ZM Biogon 25 2.8 on an M6

[Suede]

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I'm using the Zeiss 25mm 2.8 on my M6. The lens claims it will focus as close as 0.5m. The camera's focussing patch gives up indicating focus beyond (or 'below', might I say, meaning less than) a point and certainly indicates that the subject is not in focus. As such, not 'focusable"...?

 

Now.... If I were to set the focus ring on the lens to the minimum focus possible and have the actual distance between the subject and lens measured to 0.5, will my subject be in focus?

 

I am in a bit of a spot (read grey area) at this extreme range of the mate-ship between the M6 and the Zeiss Biogon. I'd asked someone who'd reviewed the lens and they said that the Biogon 25/2.8 would 'rock' on an M6!!

 

I'm not too clued on such issues and hope that I've been able to put my predicament across to whoever might volunteer to shed light on it....

 

Thanks, in advance, for any light that might be shed on the subject forthcoming!

[FrozenInTime]

The M rangefinder will only focus down to 0.7m.

To use the lens beyond that, say down to 0.5m, you need to scale focus.

There is a film plain datum under the film wind level : use that as your distance reference.

[Xmas]

There is a film plain datum under the film wind level : use that as your distance reference.

 

My M6 does not have a datum but the little rubber dot is close to the film plane, I'd suggest a 25mm on a rfdr is not really too useful at 0.5m, you need a SLR for that scenario. Some of the older lenses had a click stop at 1m to tell/warn you that the rangefinder was not available.

 

Noel

[kdemas]

I had no idea that the film plane marker was a "datum". See, you learn something new every day!

 

Hey Frozen, I think I've seen you before somewhere