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Author Topic: Dual Convex Single Element on a Speed Graphic  (Read 1607 times)

David Bardes

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Dual Convex Single Element on a Speed Graphic
« on: August 27, 2014, 06:07:06 PM »
I taped a 75mm dual convex lens element on to a foam core lensboard and strapped it onto a Speed Graphic. The Focal Length is about 300mm, and the f-stop is about f4. Shutter speeds are approximate as the focal plane shutter on this early Speed Graphic has not been tested. Lots of fun!
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mcduff

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Re: Dual Convex Single Element on a Speed Graphic
« Reply #1 on: August 27, 2014, 06:29:16 PM »
Those look awesome
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check out Don's stuff at http://www.flickr.com/photos/mcduffco/

rotarysmp

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Re: Dual Convex Single Element on a Speed Graphic
« Reply #2 on: September 12, 2014, 10:30:32 PM »
I did something similar, but used both rolleinar close up lens back to back across a 3mm aperture. Made an amazingly sharp contact print on 4x5.
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Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

jojonas~

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Re: Dual Convex Single Element on a Speed Graphic
« Reply #3 on: September 15, 2014, 09:22:46 PM »
inspiring! I have good hopes for creating my own 4x5 camera in due time~
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/jonas
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