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CZ Planar f/2.8 80 mm


pavel_l.

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<p>Hi all.<br>

I have a question for the owners of CZ Planar f/2.8 80 mm. I noticed that the depth-of-focus catch button does not work if f-stop set to between f4 and f2.8 (same behavior as during f2.8 position.) I can't find any reference describing this functionality. Is this normal?<br>

Cheers.</p>

"... Our perception of the world is a fantasy that coincides with reality."

Chris Frith.

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<p>That is normal, I have a couple of CZ lenses (C T*) and the depth of field catch button starts to work from 1 stop from fully open (i.e. f4.0 for the 80 F 2.8, 5.6 for the 150 f 4.0).<br>

Having said that, you can just close one more stop, between f5.6 and f4, press the depth of field button and then open one stop to f 3.5 and you will be able to evaluate the effect, which I presume will be insignificant, as Rodeo Joe said previously.</p>

 

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