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Objective Lens


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#1 Bill Totolo

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Posted 05 November 2007 - 06:33 PM

Can anyone tell me why this lens doesn't require a focus ring?
I'm sure it has something to do with being an "objective lens" but I can't find any info in the AC manual or by searching the forums.

Thank you
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#2 chuck colburn

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Posted 05 November 2007 - 07:41 PM

Can anyone tell me why this lens doesn't require a focus ring?
I'm sure it has something to do with being an "objective lens" but I can't find any info in the AC manual or by searching the forums.

Thank you


It's in what's called barrel mount or that is to say just the basic lens housing with an aperure control ring. A focusing mount could be added to this or it could be used that way on a set of bellows or whatever. It's f2.0 not f20
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#3 Bill Totolo

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Posted 06 November 2007 - 02:05 AM

It's in what's called barrel mount or that is to say just the basic lens housing with an aperure control ring. A focusing mount could be added to this or it could be used that way on a set of bellows or whatever. It's f2.0 not f20


Thanks Chuck,

So as it stands, where is the focus set?
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#4 chuck colburn

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Posted 06 November 2007 - 12:27 PM

[quote name='Bill Totolo' date='Nov 5 2007, 11:05 PM' post='202237']
Thanks Chuck,

So as it stands, where is the focus set?

[/quote

Nowhere. It's just an optical group that can have whatever focusing configuration and lens mount you want put on it.
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