steven_de_jong Posted January 9, 2017 Share Posted January 9, 2017 <p>This was in a bunch of 8x10 Deardorff stuff. Looking for a name or accurate description of what it is called. One knob opens and closes the aperture, the other one locks it.<br> Thanks<br> <img src="http://i.imgur.com/dy2FyMom.jpg" alt="" width="240" height="320" /><img src="http://i.imgur.com/i1z0vsqm.jpg" alt="" width="320" height="240" /><br> <img src="http://i.imgur.com/qRhcRyVm.jpg" alt="" width="240" height="320" /></p> Link to comment Share on other sites More sharing options...
bob_salomon Posted January 9, 2017 Share Posted January 9, 2017 It is for clamping a lens onto the camera. If you are doing critical work don't use it as there are frequently issues with these and maintaining proper lens parallism with the front standard. Link to comment Share on other sites More sharing options...
steven_de_jong Posted January 9, 2017 Author Share Posted January 9, 2017 <p>Thank you Bob.</p> Link to comment Share on other sites More sharing options...
jnanian Posted January 19, 2017 Share Posted January 19, 2017 <p>hi steve</p> <p>in addition to what bob said ...<br> it is a universal mount ( the locking iris ) that allows barrel lenses<br> and other things that might not necessarily be on a lens board that you might have .. to be mounted<br> on the camera. lots of people use + love these things, it makes using un-boarded lenses &c<br> easy to pick up and use. probably a loose mount ( iris not snug/locked well to the barrel) would make<br> the lens sag, attaching a long lens too close to the back end would not be very good, but i would not hesitate<br> to use one of these even for "serious work" if i knew its limitations ... i've always wanted one<br> since i tend to use a lot of barrel and home made lenses with a quck+dirty masonite/card stock/matboard<br> or foam core lens board or friction mounts ( even for serious work ) .. i never have the $$ for a<br> universal iris mount, which depending on its size is between 100-250$ .. ( or more )</p> Link to comment Share on other sites More sharing options...
steven_de_jong Posted January 19, 2017 Author Share Posted January 19, 2017 <p>Thanks J,<br> Didn't think it was worth much, never know till you ask.</p> Link to comment Share on other sites More sharing options...
jnanian Posted January 25, 2017 Share Posted January 25, 2017 <p>one's currently being sold on another photography-space for more than<br> i suggested they were worth :)</p> <p>as i said, some people love these things, and there always seem to be people buying them<br> ( and they don't seem to be the person who just bought one, tried it, said "ugh, why did i buy this?!" and then re-sell it. ) </p> Link to comment Share on other sites More sharing options...
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