Filmwasters

Which Board? => Photo Essays => : David Bardes August 27, 2014, 06:07:06 PM

: Dual Convex Single Element on a Speed Graphic
: David Bardes 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!

: Re: Dual Convex Single Element on a Speed Graphic
: mcduff August 27, 2014, 06:29:16 PM

Those look awesome

: Re: Dual Convex Single Element on a Speed Graphic
: rotarysmp 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.

: Re: Dual Convex Single Element on a Speed Graphic
: jojonas~ September 15, 2014, 09:22:46 PM

inspiring! I have good hopes for creating my own 4x5 camera in due time~