Quote:
Originally Posted by silv
....
The 500mm is quite new and I'm still struggeling with the manual focus which lacks image stabilisation. That's pretty hard I can tell you and dizzy spells are guaranteed when concentrating on the life viewer while focussing... and the sweet spot is always half a mm away ...  |
There is substantial focus backlash in those lenses.. see here (last post):
http://www.iceinspace.com.au/forum/s...t=opteka+500mm