View allAll Photos Tagged Subframing

The constellation of Cygnus has a lot of interesting things to photograph and covers a wide areas of the night sky. In this image you can find NGC 6910 aka Rocking Horse Nebula, which is a loose collection of stars. You can find SH2-108 the Butterfly Nebula. The dominant star is yCyg.

 

Semester S50

724 ten-second subframes

I took this photo with a Sony A7III camera, attached to an Orion 80mm ED doublet refractor, and mounted on a Celestron CGX-L.

I only took 8 subframes for stacking. More is usually better.

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Photographed from mid-town Toronto, Canada

* Temperature -6° C. the first night; 0° C. the second night; -4° C. the third night

 

This three-frame assemblage shows how the appearance of the Moon changes from one night to the next, as the terminator (the dividing line between day and night) moves from right to left across the visible face of the Moon. On average, the terminator moves across the Moon's face about 12.7° per 24 hours, as the Moon orbits planet Earth once per month.

 

The time difference between the right and middle frames was 25 hours, and between the middle and the left frames was 28 hr, 20 min.

 

In the right frame, the Moon is 96.2% illuminated by the Sun; in the middle frame, the illuminated portion has decreased to 90.6%, and in the left frame the illuminated portion is 82.1%.

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Nikon D810 camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope (explorescientificusa.com/products/152mm-apochromatic-refr...), mounted on Sky-Watcher AZ-EQ6 SynScan mount (ca.skywatcher.com/_english/02_mounts/02_detail.php?sid=65).

 

1200 mm focal length, f/8

 

* ISO 100 or 125, multiple stacked 1/250 sec. exposures

 

Subframes stacked in Registax

Processed in Photoshop CS6

(brightness, contrast, colour desaturation, sharpening, image rotation)

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First light with QHY294C OSC / one-shot color/ camera . Testing for best setting and best capturing software but weather not cooperating, nice hot beautiful summer days but hazy nights. For this stack, I choose only 23 subframes, 60 sec each from 100 's using SubframeSelector in PixInsiaght. I hope I'II grab more and reprocess image soon. All processing done in PI included StarMask, all bright stars saturated so I did not touch them. This camera is so sensitive and captures so many bright stars especially on Milky Way take so much time to process. I used a Sequence Generator, When I am using SharpCup I am not relaxed because is downloading all the time video frames and crushing often.

 

Many people are familiar with the night constellations, but for some reason I have a mental block and don't organize the sky that way. I prefer taking images like the one above in a wide field to help me understand the positions of deep space objects.

 

NGC 2903 probably isn't on anyone's dance card. I spotted it while using the Dwarf 3 app on my iPhone (a new feature). Instead of finding a deep space object in a catalog, I held my cellphone to the sky to display objects on the screen in real time. Then I tapped on one (in this case NGC 2903) and let the Dwarf do the rest.

 

Dwarf 3 Smartscope

300 thirty-second subframes | 60 gain.

 

Click to zoom in.

Backside of Trollbeads silver pendant Naughty Dragon, designer Søren Nielsen.

Back in the 50', people would regularly hit the road embarking their little families out for a WE, also for holidays or just go picnic, for doing so they needed spacious cars. This relic, standing in the backyard of a repair-shop, awaiting better days, just reminded me of those hopeful times :-)

 

The Panhard Dyna Z is a lightweight motor car produced by Panhard of France from 1954 to 1959. It was first presented to the press at a Paris restaurant named "Les Ambassadeurs" on 17 June 1953 and went into production the following year. In 1959 it was replaced by the Panhard PL 17.

 

Panhard was one of the world's oldest auto manufacturers and since 1945 had become known for producing economical cars. Panhard, like Citroën, considered itself a leader, not a follower of automotive trends, and the Dyna Z featured an impressive array of unusual engineering choices.

 

In 1955 Citroën had taken a 25% holding in Panhard's automobile business and during the next two years the national dealership networks of the two businesses were integrated. This gave Citroen and Panhard dealers an expanded market coverage, incorporating now a small car, a medium-sized saloon and a large car range. It gave the Panhard Dyna Z, during its final years in production, a level of market access that its predecessor had never enjoyed. Sales benefited.

 

The Dyna X was replaced by the more streamlined Dyna Z in 1954. This was later developed into the similar PL 17, launched in 1959, in an attempt to conform to the styles of the time.

 

Like its predecessor the Dyna X and the Panhard Dynavia concept that influenced its design, the Dyna Z's body was originally aluminium with steel tube subframes front and rear joined by steel plate reinforcements in the sills. The decision to use aluminium sheeting for car bodies had been taken at a time when a sudden drop off in demand for fighter planes had left the producers with a glut of the metal, but in subsequent years the relative cost advantage of sheet steel had increased steadily. Other sources emphasize an underlying error with the original costings for the model which had taken no account of the off-cuts from the aluminium coils after the blanks for the body panels had been cut from them. Jean Panhard's explanation to a sympathetic interviewer concludes with the observation that "nobody wanted to buy offcuts except at a ridiculously low price, this difference was our profit margin." In Summer 1954 the cost penalty of persisting with aluminium bodywork had become financially unsustainable, and from September 1955 the Dynas Type "Z1" switched to steel bodywork, even though the door shells, trunk/boot and hood/bonnet were at this stage still made of aluminium. The switch to a sheet-steel body shell, attributed to "various setbacks" ("nombreuses déboires") with the aluminium body of the earlier Type Z1, imposed an instant weight penalty of 123 Kg. and had to be accompanied by a substantial redesign of the front suspension and a change to the shock absorbers, though cost savings were too late to avoid the need for Panhard to sign their ultimately suicidal refinancing "agreement" with Citroën in April 1955.

 

By 1958, only the bumpers, the fuel tank, the engine cooling shroud and most of the engine and transaxle cases were aluminium, but the weight was still quite low for a relatively comfortable six-seater saloon, when compared with narrower competitor models from Peugeot and Simca. Its unusual and very modern design gave it a unique combination of space, ride comfort, performance and fuel economy at a very competitive price. But reliability suffered and fuel prices were not high enough, even in France, for people to put energy efficiency first. The car also suffered from some engine and wind noise. The Tiger version had a racing inspired engine and a full cooling shroud.

 

History

Panhard was originally called Panhard et Levassor, and was established as a car manufacturing concern by René Panhard and Émile Levassor in 1887.

 

Early years

Panhard et Levassor sold their first automobile in 1890, based on a Daimler engine license. Levassor obtained his licence from Paris lawyer Edouard Sarazin, a friend and representative of Gottlieb Daimler's interests in France. Following Sarazin's death in 1887, Daimler commissioned Sarazin's widow Louise to carry on her late husband's agency. The Panhard et Levassor license was finalised by Louise, who married Levassor in 1890. Daimler and Levassor became fast friends, and shared improvements with one another.

 

These first vehicles set many modern standards, but each was a one-off design. They used a clutch pedal to operate a chain-driven gearbox. The vehicle also featured a front-mounted radiator. An 1895 Panhard et Levassor is credited with the first modern transmission. For the 1894 Paris–Rouen Rally, Alfred Vacheron equipped his 4 horsepower (3.0 kW; 4.1 PS) with a steering wheel, believed to be one of the earliest employments of the principle.

 

In 1891, the company built its first all-Levassor design, a "state of the art" model: the Système Panhard consisted of four wheels, a front-mounted engine with rear wheel drive, and a crude sliding-gear transmission. It would remain the standard until Cadillac introduced synchromesh in 1928. This was to become the standard layout for automobiles for most of the next century. The same year, Panhard et Levassor shared their Daimler engine license with bicycle maker Armand Peugeot, who formed his own car company. Source Wikipedia.

Manufacturer: Carozzeria Pininfarina S.p.A., Cambiano - Italy / Lancia Automobiles S.p.A., Turin - Italy

Type: Flaminia Pininfarina Coupé 3B 2.8 Tipo 826 030 SN

Production time: October 1962 - October 1967

Production outlet: 1,085

Engine: 2775cc V-6 pushrod OHV, V-60deg

Power: 140 bhp / 5.400 rpm

Torque: 221 Nm / 3.000 rpm

Drivetrain: rear wheels

Speed: 181 km/h

Curb weight: 1520 kg

Wheelbase: 108.3 inch

Chassis: box-shaped frame with longitudinal bars and subframe for the front axle and engine and a semi-selfsupporting steel unibody

Steering: worm & roller

Gearbox: four-speed manual (lying behind the differential ) / all synchromesh / steering column shift

Clutch: hydraulic single dry plate disc (lying behind the differential)

Carburettor: Solex C35 P 3-12 3-barrel and electrical Bendix fuel pump

Fuel tank: 56 liter

Electric system: Marelli 12 Volts 45 Ah

Ignition system: distributor and coil

Brakes front: Dunlop 11.5 inch hydraulic discs

Brakes rear: Dunlop 12 inch hydraulic discs

Suspension front: independent double trapezoidal wishbones,sway bar, coil springs + hydraulic telescopic shock absorbers

Suspension rear: De Dion setup transaxle (double “hinge” axle), Panhard rod, sway bar, semi-elliptic leaf springs + hydraulic telescopic shock absorbers

Rear axle: live

Differential: hypoid

Wheels: 16 inch

Tires: 175 x 400 Michelin X / Pirelli Cinturato S

Options: Saxomat semi-automatic transmission with automatic clutch

 

Special:

- The body was designed and built by Pininfarina, based on the Battista Farina's “Florida II” show car of 1957.

- The name "Flaminia" is derived from an ancient Roman road.

- It was a quality built car with quality materials like aluminum (i.a. doors, fuel tank, B-pillar panels), brass nuts, walnut (i.a. dashboard, internal trim) and narrow gaps between parts.

The iron railing of the Pfluger Pedestrian Bridge frames beautiful downtown Austin, Texas.

FlickrFriday theme is: #Subframing

This is a six-panel mosaic of the Moon a few hours before it was full. Each panel is the best 40% of 600 subframes in luminance.

 

Peter

Equipment: ZWO ASI174MM, f/3.3 reducer, 12inch f/10 SCT, EQ8 mount

Dumbbell Nebula taken from my backyard @ Tiny , Ontario, Canada . Through my TS APO 130 mm refractor with ASI294MC camera .Stack of 120 subframes x120 seconds exposure time each and processed in PixInsight .I used STC ASTRO DUO - Narrowband Filter .You can see easy hot gas bubbles and shockwaves distribution . Nebula with stars coming soon as possible I

* Ugh, ... mud on my tires ....!

 

Manufacturer: Lancia Automobiles S.p.A., Turin - Italy

Type: Beta Coupé 1600 Tipo 828 1a Series

Production time: mid-year 1974 - mid-year 1975

Production outlet: 1,978

Engine: 1592cc straight-4 Fiat Twin Cam 828AC.000 DOHC

Power: 108 bhp / 6.200 rpm

Torque: 135 Nm / 4.500 rpm

Drivetrain: front wheels

Speed: 180 km/h

Curb weight: 1010 kg

Wheelbase: 92.5 inch

Chassis: box frame with subframe and self-supporting aluminum uni-body

Steering: rack & pinion

Gearbox: five-speed manual (transversely in-line) / all synchromesh / floor shift

Clutch: single dry plate disc

Carburettor: Weber 34 DMTR21 / Solex C34 CIC-1

Fuel tank: 51 liter

Electric system: 12 Volts 45 Ah

Ignition system: distributor and coil

Brakes front: 9.88 inch hydraulic discs

Brakes rear: 9.88 inch hydraulic discs

Suspension front: independent MacPherson struts, parallel transverse links, lower wishbones, sway bar, coil springs + internal telescopic shock absorbers

Suspension rear: independent MacPherson struts, multi-link, parallel double lower wishbones (A-arm, control arm), sway bar, coil springs + internal telescopic shock absorbers

Differential: helical axle drive 4,214:1

Wheels: 5½J x 14 inch

Tires: 175/70 SR 14

Options: ZF power steering

 

Special:

- The Beta (1972-1984) was the company's first new model introduced by Lancia after it had been taken over by FIAT in 1969.

- Vincenzo Lancia used letters of the Greek alphabet for his early cars, like Alpha, Beta, Gamma, etc., and as such, Beta had been used on two previous vehicles.

- This 2+2 Coupé, designed in-hous led by Aldo Castagno (Lancia) and Pietro Castegnero (from Carozzeria Pininfarina S.p.A., Cambiano - Italy, but acting as styling consultant), is based on a shortened Berlina chassis (100 inch) and has also the first ever multi-link rear suspension used in a mass produced car, designed by Sergio Camuffo.

- The Beta Series was assembled in Turin (Italy) and in Pamplona (Spain).

HM Coastguard team preparing for training exercises, Arinagour, Isle of Coll

-Equipment-

Scope: TS-Optics 94/414 EPDH (414mm focal)

Camera: ZWO ASI533MC Pro at -15°C

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher NEQ5

Filter: Optrolong L-eXtreme

 

-Acquisition-

Light : 131x300s (11h)

Dark-100x300s Flat-50 Bias-100

Date : 9, 10, 11 November 2021

Location : France-Alsace Bortle 4/5

 

-Software-

Carte du Ciel, N.I.N.A, Phd2 , PoleMaster and PixInsight

Ez Processing Suite from darkarcon

darkarcon website : darkarchon.internet-box.ch:8443/

 

-Pre Processing each panels in PixInsight-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Drizzle x2

Dynamic crop

 

-Processing

 

DBE master Light

Split L,R,G,B layer from Master light

 

__L__

Ez_Deconvolution

Ez_Denoise

Ez_Soft Streatch

UnsharpedMask

LocalHistogramEqualization

 

__RGB__

Linear Fit

BackgroundNeutralization

PhotometricColorCalibration

Ez_Soft Streatch

Starnet++

CuvesTransformation with mask

A lot of curves...

SCNR star mask

Bring back stars with PixelMath

 

__LRGB__

LRGBCombination

Final CurvesTransformation

Ez_Star Reduction

Save as jpg

 

Clear Skies !

Manufacturer: Carozzeria Pininfarina S.p.A., Cambiano - Italy / Lancia Automobiles S.p.A., Turin - Italy

Type: Flaminia Pininfarina Coupé 3B 2.8 Tipo 826 030 SN

Production time: October 1962 - October 1967

Production outlet: 1,085

Engine: 2775cc V-6 pushrod OHV, V-60deg

Power: 140 bhp / 5.400 rpm

Torque: 221 Nm / 3.000 rpm

Drivetrain: rear wheels

Speed: 181 km/h

Curb weight: 1520 kg

Wheelbase: 108.3 inch

Chassis: box-shaped frame with longitudinal bars and subframe for the front axle and engine and a semi-selfsupporting steel unibody

Steering: worm & roller

Gearbox: four-speed manual (lying behind the differential ) / all synchromesh / steering column shift

Clutch: hydraulic single dry plate disc (lying behind the differential)

Carburettor: Solex C35 P 3-12 3-barrel and electrical Bendix fuel pump

Fuel tank: 56 liter

Electric system: Marelli 12 Volts 45 Ah

Ignition system: distributor and coil

Brakes front: Dunlop 11.5 inch hydraulic discs

Brakes rear: Dunlop 12 inch hydraulic discs

Suspension front: independent double trapezoidal wishbones,sway bar, coil springs + hydraulic telescopic shock absorbers

Suspension rear: De Dion setup transaxle (double “hinge” axle), Panhard rod, sway bar, semi-elliptic leaf springs + hydraulic telescopic shock absorbers

Rear axle: live

Differential: hypoid

Wheels: 16 inch

Tires: 175 x 400 Michelin X / Pirelli Cinturato S

Options: Saxomat semi-automatic transmission with automatic clutch

 

Special:

- The body was designed and built by Pininfarina, based on the Battista Farina's “Florida II” show car of 1957.

- The name "Flaminia" is derived from an ancient Roman road.

- It was a quality built car with quality materials like aluminum (i.a. doors, fuel tank, B-pillar panels), brass nuts, walnut (i.a. dashboard, internal trim) and narrow gaps between parts.

Canon 500N & ef 28-80mm, Fomapan 400 in xtol1:1

Seestar S50

 

393 ten second subframes - polar alignment

City of Wells Steam Loco - East Lancashire Railway

Prague, Czech Republic

Crop of flic.kr/p/2oZQ87j

 

Western Veil is a part of the Cygnus Loop, a large supernova remnant (SNR) in the constellation Cygnus.

This nebula is located aroud 2400 light years from Earth 😮

 

Full resolution on www.astrobin.com/77ml6b/0/

 

Ha= 64x300s

Oii= 62x300s

R=15x30s

G=12x30s

B=12x30s

 

Total time : 10h49'

 

-Pre Processing-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Image Integration

Drizzle x2

 

-Processing-

 

Star Alignment

Dynamic Crop

Dynamic Background Extractor

Linear Fit Oii to Ha

 

___L layer___Ha

BlurXterminator

NoiseXterminator

EZ Soft Stretch

 

___RGB layer___SHO

EZ Soft Stretch Oiii

Combine Ha and Oiii in Pixel Math (ForaxX palette)

R=(Oiii^~Oiii)*Sii + ~(Oiii^~Oiii)*Ha

G=((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii

B=Oiii

CurveTransformation

Color Saturation

Final Curves

NoiseXterminator

Save as JPEG

 

Clear skies !

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Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto)

* Temperature 11° C.

 

* Total exposure time: 8 minutes.

___________________________________________

 

Description:

 

High in the northern hemisphere summer and autumn sky our home galaxy, the Milky Way, runs through the constellations Cepheus (left side) and Cygnus (right).

 

This area of the sky is riddled with glowing red clouds of hydrogen gas, numerous star clusters, and areas of dark foreground gas that obscures the light of millions of stars beyond.

 

Above and to the left of centre is the bright circular red gas cloud IC 1396. For a close-up view of this nebula made with a 540 mm focal length telescope later the same evening, click here:

www.flickr.com/photos/97587627@N06/30787835700

 

One of the most distinctive gas clouds is the aptly named "North America Nebula", just below and a little right of centre. For a close-up view of this nebula made with a 300 mm lens, click here:

www.flickr.com/photos/97587627@N06/29220929561

 

For a version of this photo WITH labels, click on the right side of your screen, or click here:

www.flickr.com/photos/97587627@N06/30348287793

___________________________________________

 

Technical information:

 

Sigma 50 mm f/1.4 DG HSM ART lens on Nikon D810a camera body, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head

 

Eight stacked frames; each frame:

50 mm focal length

ISO 2500; 1 minute exposure at f/4; unguided

(with LENR - long exposure noise reduction)

 

Subframes registered in RegiStar;

Stacked and processed in Photoshop CS6 (brightness, contrast, levels, colour balance, colour desaturation)

******************************************************************************

Comet C/2022 E3 (ZTF) I imaged this remotely from Spain 31st December 2022 4:30am with Epsilon 180ed and ZWO ASI2400MC pro. Exposure time was 45mins total using 60s subframes.

Cheers

Peter Shah

Hasselblad 500 on Kodak Gold 200

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Photographed from mid-town Toronto, Canada, at 21.05 EST (Moon altitude: 61° | Sun 42° below the horizon)

* Temperature -10° C.

 

The weather has been so bad in southern Ontario for the last almost two months that tonight was the first time since Nov. 22 that I have had the telescope out under a clear sky!

 

The Moon, in its waxing gibbous phase and 78% sunlit, was riding high over Toronto tonight, just four nights before the total eclipse of the Moon this coming Sunday night. It was quite cold, but there was no wind to blow the telescope around, so I was able to get very clear, high resolution base images from which to make this image.

______________________________________________

 

Nikon Z7 camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope, mounted on Sky-Watcher AZ-EQ6 SynScan mount.

 

Best nine of twelve identical stacked frames - each frame:

● 1253 mm focal length

● ISO 100, 1/250 sec. exposure, f/8

 

Subframes stacked in Registax

Processed in Photoshop CS6

(cropping, brightness, contrast, colour desaturation)

***************************************************************************

******************************************************************************

Photographed at Algonquin Provincial Park, Ontario, Canada, between 03.10 and 03.38 EDT

(285 km by road north of Toronto)

* Altitude of nebula at time of exposures: 31-34°

* Temperature -2° C.

 

* Total exposure time: 13 minutes

* 540 mm focal length telescope

 

For a version of this photo WITH LABELS, click on your screen to the RIGHT of the photo, or click here:

www.flickr.com/photos/97587627@N06/30004438900

___________________________________________

 

Description:

 

I cannot think of a more famous or more often photographed and observed object in the night sky than M42 & 43 in the constellation Orion. This nebula is visible to the unaided eye smack in the centre of the sword of Orion, hanging down from Orion's three-star belt.

 

From Wikipedia:

"The Orion Nebula ... is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. It has a mass of about 2000 times the mass of the Sun."

 

For more information about this object, click here:

en.wikipedia.org/wiki/Orion_Nebula

 

For another photograph of this nebula made in March 2017, click here:

www.flickr.com/photos/97587627@N06/32743247300

___________________________________________

 

Technical information:

 

Nikon D810a camera body on Teleview 101is apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount using an ADM Accessories side-by-side saddle

 

Main body of the nebula:

Thirteen stacked frames; each frame:

540 mm focal length

ISO 3200; 1 minute exposure at f/5.4; unguided

(with LENR - long exposure noise reduction)

 

Centre of the nebula:

Eight stacked frames; each frame:

540 mm focal length

ISO 2000; 15 seconds exposure at f/5.4; unguided

 

Subframes registered in RegiStar;

Stacked and processed in Photoshop CS6 (levels, brightness, contrast, colour balance, sharpening)

******************************************************************************

The Rosette Nebula consists of an open star cluster and a large emission nebula. It is a few degrees east of the star Betelgeuse in the sky. Although I have captured it many times in wide field shots of the area around Orion, I never made a dedicated effort on the nebula itself before this. The light used here was all from the 656 nm line of hydrogen emission. I might go back later and add an oxygen channel, but I thought this result was worth sharing.

 

I shot this mosaic over seveal nights from 2022-01-28 through 2022-02-01. It's a five panel mosaic, with stacks of 2 minute exposures for each of the five tiles, ranging from 31 up to 54 subframes. Imaging was done with a Celestron Edge HD 925 with Hyperstar and an Atik 414-EX monochrome CCD with an Atik H-alpha filter. Preprocessing in Nebulosity; mosaic compilation and other processing done in PixInsight.

The Wester Veil with more data 7,5h

This is the first time I use this method on pixinsight, (HOO combination).

 

-Equipment-

Scope: TS-Optics 94/414 EPDH (414mm focal)

Camera: ZWO ASI533MC Pro at -5°C

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher EQ5

Filter: Optrolong L-eXtreme

 

-Acquisition-

Light : 90x300s (7,5h) at Gain:101 Offset:49

Dark,Flat,Offset

Date : Take on 5 night from 06/13/2021 to 07/12/2021

Location : France-Alsace Bortle 4/5

 

-Software-

Carte du Ciel, N.I.N.A, Phd2 , PoleMaster and PixInsight

All Processing in Pixinsight

Use EZ_Processing Suite(by darkarchon) in Pixinsight

ForaxX Color combination thecoldestnights.com/

 

-Pre Processing-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Drizzle x2

Crop the black bands from the stacking

 

-Processing-

 

Dynamic Background Extraction

Split RGB Channels

Combine 70% of green and 30% of blue into 'Oiii'

Rename R to Ha

EZ_SoftStretch Ha and Oiii

Pixelmath: HOO combination with ForaxX expressions

R = Ha

G = ((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii

B = Oii

Curve Transformation ( RGB/K, Hue, Saturation,...)

SCNR (Green 40%)

EZ_HDR

EZ_Star Reduction

 

Clear skies !

Some of the 50000 or so starlings that return each day at dusk to roost on the metal subframe of the pier - Aberystwyth, Ceredigion, Wales

passer-by records a street music band on her mobile phone

***************************************************************************

Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto)

between 23.10 and 23.13 EDT

* Altitude of comet's head at time of exposures: ~12°

* Temperature 17° C.

 

* Total exposure time: 1.25 minutes

* 660 mm focal length telescope

___________________________________________

 

Description:

 

This comet has been touted as the brightest in a generation. The last comet that I can remember being this bright was Comet Hale-Bopp in 1997, which was undoubtedly the best comet that i will have seen in my lifetime.

 

This visitor to the inner solar system was discovered on March 20 this year by astronomers during the NEOWISE mission of the Wide-field Infrared Survey Explorer (WISE) space telescope (hence the name of the comet). It reached naked eye visibility this month, and I finally got into a dark sky - with no Moon in the sky to wash out the fainter outer reaches of the tail - on July 17.

 

In this view we see the bright head of the comet at the left side, with the broad yellowish dust tail fanning out to the right, and the fainter, narrow bluish plasma or ion tail bordering the dust tail at the top.

 

At the time of this photo, Comet Neowise was 78 million km (0.52 astronomical units ("AU") - the distance from Earth to the Sun) from the Sun, and 109 million km (0.73 AU) from Earth, and shone at a brightness of third magnitude, with a 10 degree tail.

___________________________________________

 

Technical information:

 

Nikon D810a camera body on Tele Vue 127is (127 mm - 5" - diameter) apochromatic astrograph, mounted on Astrophysics 1100GTO equatorial mount

 

Five stacked frames; each frame:

660 mm focal length

ISO 3200; 15 sec. exposure at f/5.2; unguided

With long exposure noise reduction

 

Subframes stacked in RegiStar;

Processed in Photoshop CS6 (levels, brightness / contrast)

***************************************************************************

Taken at the Victoria & Albert Museum, London, and inspired by the Saul Leiter Exhibition at The Photographer's Gallery

Manufacturer: Lancia Automobiles S.p.A., Turin - Italy

Type: Beta Coupé 1600 Tipo 828 1a Series

Production time: mid-year 1974 - mid-year 1975

Production outlet: 1,978

Engine: 1592cc straight-4 Fiat Twin Cam 828AC.000 DOHC

Power: 108 bhp / 6.200 rpm

Torque: 135 Nm / 4.500 rpm

Drivetrain: front wheels

Speed: 180 km/h

Curb weight: 1010 kg

Wheelbase: 92.5 inch

Chassis: box frame with subframe and self-supporting aluminum uni-body

Steering: rack & pinion

Gearbox: five-speed manual (transversely in-line) / all synchromesh / floor shift

Clutch: single dry plate disc

Carburettor: Weber 34 DMTR21 / Solex C34 CIC-1

Fuel tank: 51 liter

Electric system: 12 Volts 45 Ah

Ignition system: distributor and coil

Brakes front: 9.88 inch hydraulic discs

Brakes rear: 9.88 inch hydraulic discs

Suspension front: independent MacPherson struts, parallel transverse links, lower wishbones, sway bar, coil springs + internal telescopic shock absorbers

Suspension rear: independent MacPherson struts, multi-link, parallel double lower wishbones (A-arm, control arm), sway bar, coil springs + internal telescopic shock absorbers

Differential: helical axle drive 4,214:1

Wheels: 5½J x 14 inch

Tires: 175/70 SR 14

Options: ZF power steering

 

Special:

- The Beta (1972-1984) was the company's first new model introduced by Lancia after it had been taken over by FIAT in 1969.

- Vincenzo Lancia used letters of the Greek alphabet for his early cars, like Alpha, Beta, Gamma, etc., and as such, Beta had been used on two previous vehicles.

- This 2+2 Coupé, designed in-hous led by Aldo Castagno (Lancia) and Pietro Castegnero (from Carozzeria Pininfarina S.p.A., Cambiano - Italy, but acting as styling consultant), is based on a shortened Berlina chassis (100 inch) and has also the first ever multi-link rear suspension used in a mass produced car, designed by Sergio Camuffo.

- The Beta Series was assembled in Turin (Italy) and in Pamplona (Spain).

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Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto)

* Temperature 11 degrees C.

 

Total exposure time: 15 minutes.

* 540 mm focal length telescope

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Description:

 

This is a large and quite faint emission nebula and star forming region over 100 light-years across, located about 2,400 light-years away in the constellation Cepheus. It is energized by the bright, bluish central multiple star. The very small Elephant’s Trunk nebula (IC 1396A) is inside the dark elongated globule just to the right of centre.

 

From one web site: "The brightest star (38,000 times brighter than the Sun) ... [at the lower left edge of the nebula] is mu Cephei. It is a red supergiant star with a diameter larger than the orbit of Saturn, some 2536 times the diameter of the Sun. It is one of the largest stars we know of. Also called Herschel’s Garnet Star, mu Cephei is a variable star that varies in magnitude from 3.4 to 5.1 over a period of approximately 730 days."

 

For a view of this same nebula made with a 200 mm lens on July 1 of this year, click here:

www.flickr.com/photos/97587627@N06/28078652915

 

For a version of this photo WITH LABELS, click on your screen to the RIGHT of the photo, or click here:

www.flickr.com/photos/97587627@N06/31041148481

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Technical information:

 

Nikon D810a camera body on Teleview 101is apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head

 

Fifteen stacked frames; each frame:

540 mm focal length

ISO 6400; 1 minute exposure at f/5.4; unguided

(with LENR - long exposure noise reduction)

 

Subframes registered in RegiStar;

Stacked and processed in Photoshop CS6 (brightness, contrast, colour balance, levels)

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