View allAll Photos Tagged testing
Testing my 3D printed camera
Goodman Zone
Mamiya Sekor 50mm f/6.3
RB67 back modded for 35mm panoramas
Kodak Vision3 250D/5207
Test shot with my new Canon L lens... it's horrible weather and I'm doomed to shoot crap at home. I manually focussed that photo in live view while holding it with my hands. D:
Did a quick flash diffusion test with my Tamron 90 lens at 1:1 of a test subject using my normal coke can diffuser on a bracket mounted 430Ex vs using a diffused Opteka 600 twin macro flash ( shot here www.flickr.com/photos/lordv/5577399335/ ). Far prefer the light from the single diffused flash with it's much larger ddiffuser head.
Testing Graphic Novel filter (for Gmic)
For setting used see www.gimpchat.com/viewtopic.php?f=11&t=972
All the parts of the system are now connected. The initial tests were done with the valves removed and a voltmeter used to check that the HT and LT voltages appeared on the right pins. Since they did, the valves could be safely fitted.
The amplifier seems to work, touching the input connection with a screwdriver blade produces noise in the earphone. But the microphone doesn't do anything.
Fatigue test on high-strength steel mooring chain.
For more information please visit www.twi-global.com/capabilities/integrity-management/fati...
If you wish to use this image each use should be accompanied by the credit line and notice, "Courtesy of TWI Ltd".
Testing one, two and now, three.
Radio frequency testing has begun on the first Orion spacecraft that will fly around the Moon for the Artemis 1 mission, just two weeks after thermal and environmental tests were completed at NASA’s Plum Brook Station in Ohio, USA.
Electromagnetic compatibility or EMC testing is routine for spacecraft. All electronics emit some form of electromagnetic waves that can cause interference with other devices. Think of the buzz that speakers give out right before an incoming call on a mobile phone.
Spacecraft electronics can cause similar interference, but out in space such interference can have disastrous consequences, so all systems must be checked before launch.
EMC tests often take place in a special shielded room constructed of metal walls and doors and foamy spikes (aka absorbers) that block out unwanted external electromagnetic radiation, like ESA’s Maxwell chamber at its technical site in the Netherlands.
Though not an EMC chamber, Plum Brook’s thermal vacuum chamber is made of aluminium that does provide electromagnetic shielding, making it a suitable substitute.
To test electronics, the spacecraft will simulate a flight in realistic conditions with most of its subsystems and equipment powered and in operational mode.
The electronics are first tested for compatibility in this electromagnetic shielded chamber. Equipment will be switched on to test whether they do potentially disturb one another.
In the second round of tests, electromagnetic fields will be applied using antennas around the spacecraft to test the susceptibility to interference from external sources. The Orion capsule is equipped with electromagnetic field sensors to take measurements as the disturbance frequencies are injected into the chamber.
While all subsystems are a potential source of radio frequency noise, of particular interest are the transmitters that intentionally generate radio frequencies. These can easily disturb other equipment sensitive to electromagnetic noise, like GPS receivers, tele-command modules and other communication elements.
ESA experts are on site monitoring all tests alongside NASA colleagues as Orion moves closer to its first flight without a crew around the Moon.
Find more in depth coverage of all things Orion on the blog.
Credits: NASA
John Deere 8360RT (lead tractor) under test at the University of Nebraska Tractor Test Laboratory. The instrumentation vehicle (yellow) and following tractor provide loading for the test. Part of the test involves multiple laps around the lab's concrete oval track. I took this photo while visiting the Lester F. Larsen Tractor Test and Power Museum in Lincoln Nebraska. tractormuseum.unl.edu/
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P/S: Vui lòng không xóa watermark và credit khi sử dụng ảnh bìa, không thay tên vào ảnh bìa, 1 số quote và hình ảnh trong quá trình tìm kiếm không rõ nguồn, nếu tác giả hoặc bạn xem ghé ngang xem có thể góp ý để mình ghi chú nhằm tôn trọng tác giả :)
Fatigue test on high-strength steel mooring chain.
For more information please visit www.twi-global.com/capabilities/integrity-management/fati...
If you wish to use this image each use should be accompanied by the credit line and notice, "Courtesy of TWI Ltd".
A toy? Not really, this lens can really deliver amazingly sharp results!
--- Lessons learned:
+ best way to get the grips is to use the lens with the cam (in liveview) tethered to a tv set via DVI
+ the lens should not be used on maximum tilt -- you cannot get sharp results with this adjustment
+ the two lenses in the Lensbaby are not coated, backlight will lead to overlit blurry results ...
+ This is a 50 mm lens, minimum object distance is approx 0,6 meters ...
+ shots were take with the 4.0 aperture, ... 5.6 has a wider sweet spot, but less wow effect
+ works fine in Av-Mode
--- This is how focusing works:
Point the optical axis of the lens **exactly** towards the spot you want to focus; adjust focus ring - if possible in zoomed liveview mode.
--- This is how it not works:
Leave the lens as-is (no tilting); try to focus on an object in the corner of the image via turning the focusing wheel.
--- One problem I came across:
The 5DMkII works fine with this lens in Av mode, even better with additional liveview, but does *not* adjust exposure in *zoomed* liveview! => Firstly wait for exposure adjustment, then zoom in, adjust focus, if possible, zoom out again, shoot. :-)
Photos here were shot using old Canon FL/FD lenses mounted onto the new compact mirrorless full frame Sony Alpha A7 released on November 13, 2013 in Japan. The lenses are all manual focus due to the fact they are old legacy prime lenses. The Canon lenses used for this test:
FD 35mm, f2
FL 50mm, f1.4
FD 135mm, f3.5
FD 135mm, f3.5 (with PL filter)
This photo was taken using the portrait focal length, FD 135mm, f3.5 lens.