The resulting photos were satisfactory for snapshots but might not satisfy a demanding professional. > But its possible to browse the camera using the -shell mode, and gphoto 2 identify the camera, port, etc. ![]() I found that focusing is faster with these lenses than with a conventional manual-focus zoom. Remarks: -> The zoom lens do not open it all. 24l-Auto-Reserveonderdelen-813-2139/ T21:29:24-05:00 daily 0.1. Popular Science reviewed Vivitar's two auto focus lenses in the July 1988 issue and this to say: The lenses used a Honeywell Corporation TCL detector (an early phase detection sensor) to determine focus. The autofocus system was powered by batteries in the lens and had supported autofocus modes: one for stationary subjects and one for continuous tracking of moving subjects. The lenses were available in a variety of fixed camera mounts. Hey, I understand, theres no such thing as a free lunch. A lot of people looked at it, but the fact that it was so cheap compared to other similar lenses put people off. ![]() It was significantly cheaper than most other big name extreme wide angle zoom lenses. ![]() The Vivitar 28-70mm f/3.5-4.8 MC Auto Focus Zoom was one of two auto focus zoom lenses marketed by Vivitar to retrofit conventional, non-autofocus cameras. When I worked selling cameras there was a Vivitar 19-35mm zoom lens with EOS mount sitting on the shelf forever.
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