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Post by Deleted on Oct 22, 2015 2:45:59 GMT
I hope to get a few answers about this cam before I order it, if somebody has one and can answer some basic questions. I was told the view would be like looking through a 6mm lens on my scope, Can I back that off or is it set for that "zoom" all the time? Any suggestions on the newest choice, there is two, 1. Higher sensitivity , 2. More Color. Which would you choose and why?
I maybe getting into the whole Field of view subject here. FOV. As I am slow, please forgive my ignorance ! But you teach me how to fish and I will never starve !
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Post by davy on Oct 22, 2015 12:44:20 GMT
The camera acts as a 6mm lens.. so if you can imagine looking at all objects with your scope with a 6mm lens this is the view/ field of view you will have.. no changes can be made at scope to change this via focusser.. what you can do is add a focal reducer between the scope and camera.. by doing this you make the scope have a faster f number and depending on how much focal reduction, will vary your fov and increase it.
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Post by davy on Oct 22, 2015 12:57:13 GMT
As ken has said the smaller the scope the better..so we are looking a short tube . .and a aperture of 60,70,80mm..these scopes give a fast light gathering and a wide field of view. what we all will agree on is that no one scope can fill all your needs , if you wish to look at different objects in the night sky 2.. if its galaxies and nebula ..short fast scope and slow shutter speeds ..sense up function 3.. planets/moon depending on view required. . fast shutter..webcam.high f number scope
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Post by Rick in NWArk on Oct 22, 2015 14:33:53 GMT
The effective focal length of your scope and the properties of the chip determine the field of view / image scale / "magnification" of your setup.
Effective focal length is your native scope focal length (80mm F/6 scope is 480mm for example), plus any modifications. Modifications include a Barlow (increases effective focal length) focal reducer (reduces, obviously) and any spacers or extension tubes used.
The properties of the chip include the number of pixels and the pixel size.
Both of the Micro cameras have the same chip properties, so both cameras will give you a field of view of 34.95 minutes x 26.18 minutes for an 80mm F/6 scope (480mm) with no focal adjustments. In comparing to eyepieces, it's a little hard because modern eyepieces are engineered to give larger fields of view - so it is probably handier to refer to the image scale : how relatively large does an object appear.
I hope this helps!
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Post by Deleted on Oct 22, 2015 15:36:21 GMT
Thanks guys! It does help a huge amount and as in what to be expecting to see and what I can achieve with what I have.
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