Zoom lens sharpness

Started Jun 29, 2012 | Discussions thread
Shop cameras & lenses ▾
Robert Cohen
Veteran MemberPosts: 3,344Gear list
Re: Zoom lens sharpness
In reply to jon404, Jun 30, 2012

Back in days of yore when I was in high school and we had a closed circuit TV studio for teaching, I used the technique of focusing with the lens zoomed in all the way, then the lens would maintain focus when I zoomed out. That was not an autofocus camera or lens.

With an autofocus camera, unless for some reason you're turning off the autofocus function, the question is academic, since the camera will refocus at whatever zoom setting you use. But I suspect that most modern still camera zoom lenses aren't designed to maintain focus the same way that TV camera lens did.

 Robert Cohen's gear list:Robert Cohen's gear list
Nikon D300 Nikon D700 Nikon AF-S Nikkor 70-200mm f/2.8G ED VR Nikon AF-S DX Nikkor 18-200mm f/3.5-5.6G IF-ED VR Nikon AF-S Nikkor 24-70mm f/2.8G ED +1 more
Reply   Reply with quote   Complain
Post (hide subjects)Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow