| Author |
Message |
    
Steve_feldman
Tinkerer
Username: Steve_feldman
Post Number: 6
Registered: 06-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, August 01, 2010 - 04:08 pm: | 
|
Hi - I have a Yashica-Mat LM TLR with a focus problem. I can focus at any distance on the viewer ground glass, close to far, but the scale on the knob does not agree. Focusing on an object at 60 feet the focus knob reads 3-4 feet. Focus on the nearest distance shows 60 feet on the knob. Yipes! All else works fine on this camera.
Can anyone out there in TLR-land give me some advice? Hopefully it's an easy adjustment.
Thanks,
~Steve |
Foto_gaga
Tinkerer
Username: Foto_gaga
Post Number: 28
Registered: 02-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, August 01, 2010 - 05:07 pm: |
|
Sure, you move the footage scale until it agrees with the focusing, then tighten the screw to keep it that way. |
Steve_feldman
Tinkerer
Username: Steve_feldman
Post Number: 7
Registered: 06-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 02, 2010 - 01:37 pm: |
|
Hi - Thanks for your response. Can you point out where this screw is located? |
Mareklew
Tinkerer
Username: Mareklew
Post Number: 159
Registered: 03-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, August 05, 2010 - 04:31 pm: |
|
Slooooooooooooooow down here!
1) what is sharp on ground glass isn't necessarily sharp on film
2) what is sharp somewhere isn't necessarily at the indicated distance.
Sequence is: 1st get the infinity stop of focusing scale agree with film plane. 2nd get the distance scale to indicate infinity there. 3rd is to get things sharp on the focusing screen by then (by adjusting viewing lens, not so a trivial task as it sounds). Going the other way around (judging or adjusting scale by ground glass image) is only f*.*g things up bad down the road, as most often the focusing knob is right and the ground glass - wrong, not the other way around.
Check the planarity of lensboard too - bad focus scale is often an tell-tale for a front impact resulting in front standard bend -> junkie!!!
Sorry for telegraph style, I'm on a mobile+gprs, talk addiction to me...
Marek |
