<div dir="ltr"><div><div><div><div>Greetings!<br><br></div>My name is Kevin and I'm looking for some to help with a long term art project.<br><br></div>Would you be able to post the following message on your job board?<br><br></div>Thanks so much!<br></div><div>Have a great week.<br></div><div>Be well :)<br><br></div><div>Best Regards,<br></div><div>Kevin<br><br>~~~<br>
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<p style="margin-bottom:0in">Greetings, <br><br>My name is Kevin and
I am a photographic artist in the GTA.<br><br>I was wondering if
anyone could assist in building a shutter for my shutter-less
lens.<br>This of course would be a paid job.<br><br>I'm looking to
start using a large format camera for an experimental photographic
process.<br>The problem is I don't have any shutters for my old
barrel lenses.<br><br>There are shutters being made now called
Packard shutters that are large enough for my old giant lenses, but
you can't adjust the shutter speed with accuracy. <br>Because my
lenses are so big, a focal plane shutter would need to be mounted at
the front of the
lens.<br><br><a href="https://en.wikipedia.org/wiki/Focal-plane_shutter">https://en.wikipedia.org/wiki/Focal-plane_shutter</a><br><br>Here
is an example of a dual curtain focal plane shutter which I was told
would work for my lenses.<br>Basically you have two springs holding
back fabric vertically or horizontally.<br>The front fabric curtain
is closed/doesn't let light through and the rear one is open.<br>After
a microcontroller releases the front curtain, depending on the
desired shutter speed the second/rear curtain
closes.<br><a href="https://www.youtube.com/watch?v=jQuEIwQF3SQ">https://www.youtube.com/watch?v=jQuEIwQF3SQ</a><br><br>The
design I was told to try to build is a bit different than the example
in the video.<br>Instead of a rolling mechanism to reel up the
shutter fabric (which can still be found in a big enough size), one
would just use two extension springs that pull on the shutter fabric
(one for the front fabric/curtain, and one for the rear
fabric/curtain.<br><br>Some issues I'm thinking of are vibrations
that will cause motion blur during the estimated 1/2 to 1 second exposure
and durability. Perhaps the extension spring chosen can be just
enough to move a light fabric across the front of the lens. And as
for durability, perhaps this shutter mechanism can be 3d printed or
made of lightweight wood.<br><br><br>If anyone can help build a
durable version of this please contact me
at<br><a href="mailto:toyo8x10@gmail.com">toyo8x10@gmail.com</a>.<br><br><br><br>Thanks
for reading this.<br>I hope you are well and stay well.<br><br>Best
Regards,<br>Kevin H.</p>
~~~<br><br><br><br><br><br><br><br></div></div>