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JoeVanCleave
07-17-2006, 03:17 PM
This image is intended as a test of a Rodenstock 105mm, f/4.5 Omegon enlarging lens, for use in a future homebuilt box camera. I used my Speed Graphic as a test platform, with a homemade lens board for the enlarging lens, fashioned from thin model aircraft plywood, and lined on the inside with black adhesive craft felt.

I also intend to use paper negatives, my usual recipe: Arista's grade 2 paper, preflashed for 5 seconds.

This image was taken in my front courtyard, under brilliant morning sun. 2 second exposure onto Arista grade 2, preflashed 5 seconds, using lens cap on the enlarging lens as a shutter. I open the lens aperture to f/4.5 for focussing and composition, then stop down all the way to f/22 for the exposure. My meter indicates 1/2 second, with an assumed EI of 6, but I can only consistently time a lens cap style shutter for 2 seconds or longer.

I've also included a second image, detail in the upper left corner of a flower bud. Not a great composition, but this lens, with paper negatives, shows promise. Attached files http://f295.f295.org/uploads/flowerpot001a_9772.jpg (http://f295.f295.org/uploads/flowerpot001a_9772.jpg)

JoeVanCleave
07-17-2006, 03:19 PM
Here's the detail in the flower bud, upper left corner. You can see fibers or "hairs" on the stem. If I'd scanned this higher than 600dpi there would be more detail on this enlarged crop.

Both images are inverted scans from the paper negatives, no additional adjustments made. Attached files http://f295.f295.org/uploads/flowerpot001b_1255.jpg (http://f295.f295.org/uploads/flowerpot001b_1255.jpg)

retroshooter
07-17-2006, 03:31 PM
It is nice to see someone else shooting paper negatives with glass. I spent the morning working on tryin to raize the iso of paper. Alas the development time is so long that it is counter productive.

I like the pictures very much/

JoeVanCleave
07-17-2006, 03:31 PM
And here's a crop from the leaf at lower center. You can see I almost overexposed the highlights, but there's still some detail visible.

You can also see "hairs" on the plant stem (I know there's some fancy botanical term for these), as well as dust and debris on the leaf. Attached files http://f295.f295.org/uploads/flowerpot001c_8731.jpg (http://f295.f295.org/uploads/flowerpot001c_8731.jpg)

stormy
07-18-2006, 04:23 PM
Astounding detail on these Joe!