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Lens limitation and lens board for Pacemaker Crown Graphic 3

 
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dinoraptor



Joined: 29 May 2002
Posts: 1
Location: Bay Area

PostPosted: Thu May 30, 2002 1:02 am    Post subject: Reply with quote

I searched this web site and photo.net, but I couldn't find the lens limitations for wide angle and telephoto. Do I calculate lens limitation for telephoto based on bellow extension? In this case, it's like around 300mm lens for telephoto. Is this correct? I've a Pacemaker Crown Graphic 3x4 with knob 2x3 roll film back. Also, can Pacemaker 2x3 lens boards fit Pacemaker Crown Graphic 3x4? I've checked Midwest Photo Exchange and Brooklyn Camera, but I didn't find any used lens board for 3x4. I couldn't find Columbus Camera online at all. Does this mean I've to make my own lens board for 3x4? Thanks.
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Les



Joined: 09 May 2001
Posts: 2682
Location: Detroit, MI

PostPosted: Thu May 30, 2002 1:46 am    Post subject: Reply with quote

According to Graflex (graphic Graflex Photography 11th ed) the minimum flange focus is 1 5/8" for a 3x4 crown. which means you can focus a 65mm lens at infinity.

the longest lens Graflex suggests for the 3x4 is the 10" Tele Optar. This is a true telephoto meaning when focused at infinity the bellows draw is about 7"

If you used a normal 10" lens it would focus at infinity with 10" of bellows draw and you would have any close focus as the 3x4 has only 11 1/4" of bellows.

I'm afraid your stuck looking for used 3x4 boards. Each format used a different size and since 3x4 is a dead format, nobody is willing to reproduce new boards for it.
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45PSS



Joined: 28 Sep 2001
Posts: 3203
Location: Mid Peninsula, Ca.

PostPosted: Fri May 31, 2002 1:49 am    Post subject: Reply with quote

Columbus Camera Group is NOT a single store but a grouping of several in Columbus, Ohio.
This link to an auction of theirs has a means to contact them.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1356834374

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