Just look up "thread turning tool" on ebay (without the quotes). It's a lathe tool.
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
Lenses arrived from Thorlabs, along with the snack pack they always include.
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
I'll edge blacken the lenses.
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
I just dry fit the lenses to see what it'd (tack bonded in place with NOA 61). Imaged a light bulb 15 ft away onto my notebook and it forms a nice sharp image. Iphone picture compression doesn't quite do it justice.
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
Not satisfied with that, I made a camera obscura of sorts out of a soda box (which my wife drinks, ripping the boxes open like a grizzly bear) to measure focal length and view image from more distant objects.
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
Close-up of the focused image.
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
Looking good! It will be really interesting to see a portrait, when you have it complete.
Thanks.
Flange focal length (distance from the outside mounting flange to image plane) measures ~ 165mm. Reversed, focal length measures 200. Very rough measurements of course. Maybe I'll have a 2-step zoom
Next I'll either pull the optics to machine the slot for the waterhouse stops, or make a lensboard to mount it to my camera. Slow and steady, or go for broke? Decisions, decisions...
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
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