Symmar-s 135mm f5.6 questions

[Ben07]

Sorry, I failed to put the link in. This discussion: http://www.largeformatphotography.in...n-bellows-draw

Thanks for the help, really appreciate it.

[pchaplo]

Would it be possible to use a helicoid to do this?

Ah, “helicoid” is the key term. No you would need a bellows if I understand you correctly.

[Dan Fromm]

Ah, “helicoid” is the key term. No you would need a bellows if I understand you correctly.

Why?

[Ben07]

Why?

Was thinking of extending the bellows and then use a helicoid for minor adjustments.

[Ben07]

Why?

Was planning to use the helicoid for minor adjustments only

[Dan Fromm]

Was thinking of extending the bellows and then use a helicoid for minor adjustments.

Thanks for answering a question that wasn't directed to you. Y'r answer raises another question. What in your project requires a bellows for gross adjustments and a helicoid for fine?

Most of us get along just fine with a bellows attached to a front standard that moves on a bed or rail. In other words, are you sure that you need the bother and expense of a getting a helicoid?

[Ben07]

Thanks for answering a question that wasn't directed to you. Y'r answer raises another question. What in your project requires a bellows for gross adjustments and a helicoid for fine?

Most of us get along just fine with a bellows attached to a front standard that moves on a bed or rail. In other words, are you sure that you need the bother and expense of a getting a helicoid?

Was planning to make a folding point and shoot and i had intend to mount different lenses on it. The bellow would be used to extend the the lens to the right length so about a 135mm distance for a 135mm lens, 90 for a 90mm etc and then focus it separately.

[Dan Fromm]

Thanks for the explanation.

[Ben07]

Thanks for the explanation.

I know it's weird, but it's gong to be fun to build.