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Voigtlander 20mm/40mm APS-C Canon/Nikon Mount Questions
#3
[quote name='edge' timestamp='1291096342' post='4588']

I'm not sure what you mean by auto-metering.

If you use a Nikon mount via an adapter, the Canon XSi will still meter. It will be "stop-down" metering using the ap ring rather than the on-camera dial. You will lose the focus confirm in the viewfinder though. Not a problem if you focus using live view. Also the viewfinder will get dim as you stop down.

[/quote]

Depends on the adapter you have. If you have an adapter with so-called "focus confirmation chip" you will not lose focus confirmation, provided you do things in a certain order:



First you open the lens totally, and focus on the scene. Focus confirmation will help you determine focus (usually). Then you close the aperture to whatever aperture you like to use, either in Av-mode or M-mode. Then in Av-mode the camera will decide on the "correct" exposure for you, in M-mode you then set the exposure yourself, with help of the camera's metering.



Av-mode may seem a bit strange, since you can not set the aperture via the camera. But the camera will just always imagine the lens to just be open, and set the shutter speed to the light conditions reaching the metering regardless of the real aperture.
  


Messages In This Thread
Voigtlander 20mm/40mm APS-C Canon/Nikon Mount Questions - by Brightcolours - 11-30-2010, 01:22 PM
Voigtlander 20mm/40mm APS-C Canon/Nikon Mount Questions - by genotypewriter - 12-01-2010, 03:58 AM

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