If you are using some sort of meter, it gives you infinite positioning. With
click stops, it can be hard to set an aperture colose to a click stop.
Bill pearce
----- Original Message -----
From: "Michael Wong" <mialop@xxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Tuesday, April 14, 2009 9:09 AM
Subject: [OM] [OT] Questions for enlarging lens
> Have got a Rodenstock Rodagon 80mm F4 enlarging lens from B&H. There is a
> release button, it makes aperture ring is free instead of stopped by half
> stop. What is the function for? Besides, I cannot rotate the aperture ring
> to the slowest speed --- F22. It'll stop at F16 position. Although I am
> seldom to apply F22 but wish to know why.
>
>
> Thanks all.
>
>
> ---
> Michael
> --
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