This is something I was actually interested in doing myself... but for me personally i was thinking of mapping the sky at a certain focul length with my camera.
The other thing I may be able to help with is processing power. Depending on how much we need and how long the processing will take. Currently I have two machines sitting idle 80% of the time with 3Ghz+ cpu's and 512mb RAM+.
as cventer mentioned we need soome guidelines for arc seconds per pixel aswell..
with a 300mm lens on my 300D is capturing around 0.68755 arc seconds per pixel? from the below calculations... which is 206.265/focul length. is this correct? or have i got this wrong... with this calculation then the smaller the focul length the more pixels per arc second... and that would be incorrect.. because being zoomed u need to do multiple shots to get the same areaa as a smaller F.L and therefore you are capturing more data with the larger F.L in the same area covered.
This will be a good and interesting project to work on!
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Originally Posted by cventer
Ok, no problemo
The hard way is:
Sky Coverage in arc-seconds/pixel = 206.265 / (focal length in mm) *(pixel size in microns)
Then to work out your area covered by your chip is simply a matter of multiplying your chips resolution in pixels by this number. A 300D has 3072 x 2024 pixel array. So multiply 3072 by your arc sec per pixel and you get length of sky coverage. Multiply 2024 by your arc sec per pixel and get the height.
The easy way is to download a free tool to do it for you in one step.
http://www.newastro.com/newastro/boo...camera_app.asp
Best Regards
Chris Venter |