CHAMONIX 045 N1

baritato

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Aug 26, 2006

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• Jul 26, 2013

• #1

HI Guys, I got a one simple question on this camera.
On the base of camera are five holes in wich i can put the connector of front strandart, but without the focal length indication.
So now i use an 135mm lens, but i'm not sure in wich of five hole i have to put...(lol) the front standart connector. I think in the third after the measurement with a meter the distance by the rear standart and the lens shutter in this position, but i hope to give more information on it.
Thank you very much!
Gianluca

 

Mark_S

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Oct 20, 2004

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Portland, OR

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• Jul 26, 2013

• #2

It will depend both on focal length, and the distance to your subject. If you are doing landscape, focusing at infinity, then when everything is in focus your lens will be about 5 1/2 " from your ground glass, so pick the hole which would allow you to turn the focus knob and adjust either side of this. If focusing on something closer, the lens will be further away, and you will want to use one of the holes that is further from the ground glass.

 

OP

OP

baritato

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Aug 26, 2006

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• Jul 28, 2013

• #3

Thank you Mark,
so i read also in the AA's the camera book, the rule of exposure factor adjustment for bellows extra extension: F= BELLOWS EXTENSION / LENS FOCAL LENGTH, for adjusting the exposure.
Thanks a lot.
Gianluca

 

rorye

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Dec 4, 2004

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• Jul 28, 2013

• #4

Barito, I believe those numbers are squared, ie Extension 2/Focal length 2.
I learned that one the hard way!

 

OP

OP

baritato

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Aug 26, 2006

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• Jul 28, 2013

• #5

Rorye, you are right! are squared!
Thank you!