Quote:
Originally Posted by JA
Hi Greg,
If photographic lenses are not out of the question for you then, around the focal length range you've indicated (~500mm in your examples) there are a few quality (used) manual lenses you could consider, which:
1. fall within your weight limit,
2. include (by design) a flatterner and
3. are faster (or could be used stopped down for even better IQ).
Unless of course, telescope it must be. In which case: Back to normal programming - 
Best
JA |
I have a number of good lenses. In fact for the last several months I have been imaging with a Pentax 645 double ED F4 lens stopped down to 58mm.
Its a good performer. The 67 300mm F4 EDIF will also work on a 16803 chip. The 645 may.
Greg.