Quote:
Originally Posted by Kirkus
So, going to focal length, just to be sure, if my focal length is 1270 and I'm using a 2x barlow, my focal length is increased to 2540, right? And a 3x barlow would increase it x3, or 3810.
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Yep that's right and the FOV will be 1/2 or 1/3 on the TouCam or equivalent to 3mm or 2mm occulars. The ultimate resolution will always be the pixel count on your camera (and the quality of the rest of your set up).
Barry