Tuesday, 8 July 2014

CaK Closeup 6th July

I've done some work on my homebrew CaK filter,  and now it lets through more light than it's previous configuration.  While this allows me to take pictures with a shorter exposure time to freeze the seeing, it also allows me to increase the focal ratio.  Here I am shooting at f35 or 1400nn focal length with the 40mm scope and DMK31 camera.  While this focal length is much to long, realistically, for the 40mm; it doesn't bring any extra detail to the image that the shorter 925mm fl does, it still makes for a nice shot!