View Single Post
Old 21-06-2013, 04:24 PM
DIYman (Doug)
Registered User

DIYman is offline
Join Date: Aug 2011
Location: Kalamunda
Posts: 44
Matching pixel size with focal length

Hello all
I feel a bit foolish about asking this but despite reading a lot of info on the net about the importance of matching pixel size with FL I cannot say that I have a 'cast iron' understanding.

My scope has a FL of 2286mm and one CCD supplier suggested I need an imager that has 5.4um x 5.4um pixel size. However, when I ran some formulas it looks like I will need about 10um.

As way of background, I am primarily interested in deep sky imaging. The place where I do my photography has average to good seeing most of the year and light pollution is not that bad as I am in transition zone between suburban and rural. Lastly, I am leaning towards a monochrome CCD as I would like the capacity do narrow band imaging.

Since these things are not cheap I would appreciate some impartial advice as to what size pixels would suit deep sky imaging with my scope. (I have read enough to know that size does matter.)

Reply With Quote