Quote:
Originally Posted by JC
Thanks Shiraz;
Thats sort of what I had thought/feared, as Ive designed the shield only slightly larger (5mm) in diameter than the objective. Suppose I can do the calculations and reduce the dew shield length if necessary.
Thanks  |
or just put up with a bit of vignetting. The other thing to consider is that anything you put within the input light cone can scatter light into your optics, so if the shield does encroach into your field of view, make it black.