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03-03-2011, 01:53 PM   #1
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[langtitle=cs]Lens Functions[/langtitle]

Hi everybody, i am new here. I would like to buy and use some old manual lenses on my Canon 7D camera body. ... what mount is the best way for me ?

I checked for example this lens with PK ...
Pentax 75-205mm f3.8 Lens PK macro focusing Vivitar - eBay (item 200553339842 end time Mar-09-11 23:21:05 PST)

and I dont understand why is there only one ring .. it means, if i would like to focus some object I cant focusing manually?. For example if i am on 70 mm there is a fixed distance from the object... ?

What about this lens ? with M42
Pentax Vivitar 85-205mm f3.8 lens manual screw M42 - eBay (item 170587247861 end time Mar-06-11 22:17:08 PST) ....

can someone help me please .. ?

03-03-2011, 05:01 PM   #2
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The first lens you linked to is a push-pull zoom lens. It doesn't have a seperate ring for zooming - instead you zoom by pulling or pushing the lens barrel back or forth. Focusing is still done by turning the ring.
Generally I would advice you to ask your questions on a Canon forum - people there may know better which lenses suit best.
03-03-2011, 06:05 PM   #3
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Also go to the Manual Lenses Forum, based in Hungary, with questions about such manual lenses. Many Canon users there work with exactly such lenses. Good luck!

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