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..immagine di prova fatta con il Takahashi TSA102,con spianatore della TS adattato al Taka mediante la realizzazione di due anelli filettati,magistralmente realizzati dal mio amico tornitore Gabrielli Licio,della ditta RG di Fano (PU)...
somma di 10 frames da 480 secondi a 400 sio,15 dark,35 flat,e 10 bias...
la foto non è stata curata nell'elaborazione,ma vuole essere una prova di come lo spianatore faccia il suo compito,e cioè di restituire puntiformità stella fino ai bordi estremi,e dal risultato sembra che le mie aspettative siano state rispettate,giudicate voi...
spero sia di gradimento.
Four pane mosaic image of globular cluster M13 taken by Nik Szymanek with the Faulkes Telescope North. RGB filters.
M13 Globular Cluster
RGB: 10X300, 10X30
Camera: QHY9C
Telescope: SkyWatcher PRO 80ED
Mount: Takahashi NJP
Location 3RF CSAC
Date: March 26, 2014
M13, the Great Hercules Cluster. Shot the night of June 17th from the front patio in St. Charles. Fourteen frames, 200 seconds each, guided on G11 mount with the 8" f/5.5 mirror made while in High School in the 1960s. A humid but stable night. Cropped to 50%, producing the equivalent image scale of a 2200mm focal length. Baader MKIII coma corrector. Captured with StarShooter Pro V1 single shot color CCD.
Another version of M13. I'm experimenting with exposures and stacking. From 10 30-second images at 2000 ISO. Stacked in CCD Stack. It is simple to work with but I haven't decided it I would want to buy the full version.
It's often concerned me that my stars always seem to be devoid of colour, so I thought I'd make a small change to my processing steps and came up with this. The original is here. I'd really appreciate some feedback on this because I've been staring at this for hours and my eyes have gone funny. There's certainly more colour in it (there's very little in the original), but I'm not sure if it's overdone or a little too forced. There seem to be an awful lot of blue stars about!
25 May 2011
200p, EQ5 unguided
Nikon D70 full spectrum prime focus
29 x 60sec
iso 1600
darks, bias and flats.
Stacked in DSS processed in CS5
M13 - Seestar collaboration - data from myself and Tim Honisett of the ASE. 7.56 hrs total expsoure time over a few days in May 2025
M13 Globular Cluster
LRGB: 10X120s unbinned 1X1
Camera: QHY22
Telescope: William Optics Star 71
Mount: Takahashi EM-11
Location: Cherry Hill Observatory
Date: June 22, 2015
M13 - The Great Hercules Cluster. This 11.65 billion year old formation of stars is one of the most impressive globular clusters in the northern hemisphere. Containing over 300,000 stars packed into a 145 light year sphere, the center of this object is 500 times more concentrated than its outer perimeters.
Technical Details:
- Explore Scientific ED80
- Focal length: 480mm
- Celestron AVX mount
- Canon EOS M3 with CHDK
- 11 lights, 5 darks, ISO 800, 20 sec each
- altogether: 3:40 min exposure
- Processed with DeepSkyStacker and Affinity Photo
M13 Globular Cluster in Hercules
4/27/09
15 x 5 minute subs
darks
flats
ISO 400
Canon 450D modded
TMB 130SS F7 Refractor
Guided w/TMB 80SS and Autoguider
Celestron CGE Mount
Post Processing Nebulosity II
Vixen R200SS
Starlight Xpress, SXVF-H16
Astronomik Typ 2c RGB filters
Astronomik CLS as Luminance
L:25x300s, 21x180s unbin
R: 17x240s bin 2x2
G,B: 17x180s bin 2x2
M13, Globular Cluster. Taken with Celestron 1100HD and CGEM DX. Used QSI 640wsg camera with lodestar guide camera.
9 shots of luminance at 1x1 bin at 10 minutes each and 6 shots each of RGB at 2x2 bin at 5 minutes each. Processed with DeepSkyStacker and GIMP 2.6. RGB exposure was a little too long resulting in some star bloating.
M13 reprocessed by Buzzer without flats or bias frames
Kappa Sigma 2.00%205%20iterations%20Processed
QHY8 Gain 1% Offset 130
25 subs 300 seconds, with flats and bias
TMB 130SS
Autoguided with Orion Auto Guider on TMB 80SS
CGE PRO Mount
Stacked with DSS, Pre Processed with Nebulosity II
Post Processing PS4
This is my first image with SkyWatcher Esprit 150ED.
The field is quite flat with my KAF8300 based camera and the color correction was excellent.
Date: Sep 11, 12 and 14, 2014
Location: Merritt, BC
Takahashi TSA-102 f/6
AP Mach1GTO
QSI683WSG
R - 5 X 5 minutes (-25C)
G - 5 X 5 minutes (-25C)
B - 5 X 5 minutes (-25C)
Synthetic luminescence is used as L.
Image acquisition: Sequence Generator Pro
Processing: PixInsight
Just a quick shot using my new filterwheel. 12X60 second subs for Luminance and each RGB frame was 5X60 second exposures. I croped like this becuse i was having alignment problems in DSS tonight and cant be bothered to spend the time fixing :-)
EXIF - 220X30" (1h50'), Gain 120, f5
Calibration: Flats - 60, Darks - 60
Camera: ZWO ASI294MC Pro (cooled to -10°C)
Filter: Astronomik L-2 - UV IR Blockfilter 1,25"
Main optics: Sky-Watcher Explorer 200P
Mount: Sky-Watcher EQ6-R Pro
Guiding: Artesky UltraGuide 70 + ZWO ASI120MM Mini
Controller: ZWO ASIair Pro
Electronic focuser: ZWO EAF
Software: DeepSkyStacker + Pixinsight + Photoshop
Location: Bilice, Sibenik, Croatia
Vc200l sbig st2000xm
REPROCESS something to do.. waiting for clear sky
no chance to use the new camera yet :o(
Great Cluster in Hercules M13
Camera: EOS T4i - Baader modified
Scope: Takahashi FSQ 106
Mount: Paramount GT1100
Arguably one of the most photographed and largest globular clusters in the northern hemisphere. In this cropped image, both galaxies NGC6207 and IC 4617 are visible upper left of M13.
M13 as seen in Menlo Park.
This is a collection of two nights of data taken with the Mak. I started with a stack of 50 lights and let DSS select the best 80% - leaving 40 lights to use. Was using the Pentax K10D with the cooler set to -10C - giving CCD temps of 15-16C. Ambient temps these evenings were about 15C so this effort neutralized the camera heat. Also, it was cool and damp enough to cause concerns for dew, so I used the dew heater at the lowest setting. Interestingly, this seems to help with the focus shift due to temperature.
I looked deeply at the darks that I'd captured earlier in the week and realized that they were also flawed with light leaks. Back to the drawing board for those files. Also, I looked at my efforts of using cold darks for bias to try to eliminate the amp glow. That's not so great, either, so I'm using my old bias files as well. Using these two major changes to the stacking set gave much smoother, lower noise back grounds.
It also helps that I'm dealing with an object that is mostly point source rather than extended, just the kind of target that the Mak will excel on with the high f ratio.
Once I brought the file into PI, I ran DBE, ACDNR (which gave some surprising results), masked stretch, curves, and a histogram stretch. I'd have liked to do more to drive the noise floor lower, but I think that most of what's remaining is because of the local light pollution.
Tracking for the night was problematic. I had the mount set to use .8x guide rate and I believe that this made it hard for Maxim to guide without oscillation. Thus, all the stars are elongated by about 1 pixel. Now that I think about it, I probably should have run that step to compact it a little. Drift was still not perfect - polar alignment is within 30arc seconds of true north.
I'm still testing, but so far this seems to work well. More trials are coming. I'm finding light leaks and stopping them when I can. I'm also working on the power budget. Letting everything run with the dew heaters, camera power, cooler, etc until sunup uses about 40-50 Amp Hours. This is 50-60% of the capacity of my battery and I don't like draining it that much. Recharge times take too long and I can't sustain that kind of dependence on daily recharges while at GSSP.
Here's the image resolving data from PI:
Image Plate Solver script version 1.51
============================
Referentiation Matrix (Gnomonic projection = Matrix * Coords[x,y]):
+0.000006205388 -0.000212175788 +0.245648531490
+0.000212053604 +0.000006270321 -0.408066179228
+0.000000000000 +0.000000000000 +1.000000000000
Resolution ........ 0.764 arcsec/pix
Rotation .......... 91.668 deg
Focal ............. 1458.00 mm
Pixel size ........ 5.40 um
Field of view ..... 48' 5.4" x 30' 53.3"
Image center ...... RA: 16 41 44.354 Dec: +36 25 45.93
Image bounds:
top-left ....... RA: 16 42 57.245 Dec: +36 01 15.52
top-right ...... RA: 16 43 05.027 Dec: +36 49 18.49
bottom-left .... RA: 16 40 24.493 Dec: +36 02 10.01
bottom-right ... RA: 16 40 30.693 Dec: +36 50 13.53
============================