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Telyt 280


ldhrads

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Received today a Telyt 280/4.8 in bayonet mount for my visoflex. Can somebody explain to me why there are 2 rings to adjust aperture?

 

Thanks

 

This is what's called a "pre-set" aperture. One of the rings has click stops and is use to limit how far the other ring can close the aperture. Set the aperture you want with the click-sopped ring, use the other ring to open to full aperture for focussing, then use the non-click-stopped ring to close the aperture to the stop pre-set by the click-stopped ring.

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