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Post by davy on Nov 14, 2013 23:10:19 GMT
a video camera...we will use the Samsung scb2000 as an example a tracking tipod mount....or static mounted camera for viewing a set piece of sky or for meteor/comet observing a connector from camera (bnc to vga)...( balun to cat5 cable) ... ( coaxial )with adapters connection to a monitor of some description/tv or to a usb capture device to a computer a telescope or a lens for the camera capture software...sharpcap freeware is a popular piece of kit...
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Post by davy on Nov 15, 2013 21:05:27 GMT
why use a video camera the modern cctv cameras are becoming more and more sensitive and this helps astronomers capture faint deep sky objects In near live viewing. the camera may need some modification before getting the best out of it,,,infra red factory fitted lens will need to be removed to allow the camera to pick up more of the spectrum we wish to capture in galaxies and nebulae (advisable to fit a infra red astronomy filter) .
the cctv converted camera fitted to a scope will allow stars to be seen live on a moniter 1 to 1.5 times more magnitude deeper than the best visual limit from given scope, so a fairly cheap scope can be used with a cctv camera and give great results.
cctv cameras are good for ..deep sky imaging...meteors,comets,fireballs,asteroids,moon,planets,solar viewing to name a few, the cctv camera acts like a fast shutter speed camera that takes very fast short short exposures, that appear as a live image.
the live image can be captured to a computer and the software should allow you to pick out the best exposures to either transfer to a program like photoshop to be touched up or to be stacked in a program like deep sky stacker (freeware).
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Post by davy on Nov 17, 2013 9:39:22 GMT
Why use video... Eyesight not as good as it used to be or impaired..you can now watch the sky via a large monitor or tv Outreach projects. ...cut down on time adjusting focus ect for a large group..use a projector snd project imagr on a wall Handicap or wheel chair bound....yet again view on a screen The weather. ..faster capture of fainter images Fed up looking st the bsck of a dslr with no live view Best of all ....it can be cheaper to start up than astrophotography
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Post by davy on Nov 21, 2013 20:49:05 GMT
Sense up /integrated/accumulation cameras are cameras that take short exposures and stack them internally to make it possible to observe faint detail in deep sky astrovideo. .having a fast exposure astrovideo cctv camera means polar alignment dosent have to be exact if used for short periods of time...so what are you looking for in a cctv camera for astronomy use... lux level 0.05 - 0.0001or better the more zeros after the point the better..sensor size bigger the better the usual is 1/3"but if you can get a 1/2" even better....sn or snr above 50db....sense up from x2 to x1024 ..adjustable shutter speed. .agc..gamma settings. .osd control..osd can now be achieved off camera now with an inline coaxial osd control box (ref reviews ) some cameras in use by forum members Samsung scb2000,, phil dyer colour (pd1)..cr6 (in reference to the six cameras carl ried found on ebay)..davy
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Post by Deleted on Nov 26, 2013 20:20:32 GMT
Why use video... Eyesight not as good as it used to be or impaired..you can now watch the sky via a large monitor or tv Outreach projects. ...cut down on time adjusting focus ect for a large group..use a projector snd project imagr on a wall Handicap or wheel chair bound....yet again view on a screen The weather. ..faster capture of fainter images Fed up looking st the bsck of a dslr with no live view Best of all ....it can be cheaper to start up than astrophotography All very good points.......... And - I would like to add - it becomes possible to have your telescope and camera outdoors and view the heavens indoors !! You may want to do this on dark cold winter nights!! I also like to find the location of objects I view on screen on my Astronomy Star maps (especially PSA) so as not to lose touch with what I am looking at. Also the "Illustrated Guide to Astronomical Wonders" book has 1 degree FOV photos of most of the main objects - I have set some of my telescope optical / camera paths to try and get as close to this as possible so I can confirm what I am looking at. At my leisure I sometimes compare my live on screen captured images with those in Giles Sparrows' giant Hubble images book "Window on the Universe" - something to aim for!! But seriously there is great satisfaction in viewing my own images and seeing objects not usually visible in my skies with a telescope alone!! Often I finish a Video Astronomy session with a quick squint through an eyepiece or naked eye roam around the sky - there is still something very satisfying about connecting with heavens in a more direct way!!
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Post by davy on Nov 26, 2013 22:50:40 GMT
Well said robin..in a electronic age its still good to do a bit of visual astronomy. .davy
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Post by Dragon Man on Nov 27, 2013 12:34:29 GMT
Absolutely correct Robin. There really is something about 'seeing it with your eye'. Even though I do Video Astronomy 90% of the time I do ONLY visual on Club nights. It keeps my eye in practice at spotting tiny faint galaxies.
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