ULF > Macro options?

[cpjfox]

Hi All,

Long time listener first time poster (I think).

I’m looking at building a static camera in my dark room for 40x50” tintype. Searches have yielded me several options for that kind of coverage, but I want to go bigger than macro, 2:1 or more. Head shots are my thing and I want to go big.

Does anyone have any ideas?

[Tin Can]

I have made 3-1, 11/14 X-Ray contact prints

I will post prints tomorrow

[ridax]

The larger the magnification, the shorter a focal length is sufficient to cover the format. With an image twice bigger than life-size, a 600mm f/9 CZJ Apo-Tessar is enough to cover 40x50". But this way, you sacrifice the perspective. Myself, I avoid taking head pictures with less then 6 feet between the subject and the lens. For 40x50", that means the need of a 1200mm focal length.

[Tin Can]

I have shot 800 SF and very sharp 900 Jena f9

I had a hole in my DR wall to outside for the 800

Time

[cpjfox]

I have shot 800 SF and very sharp 900 Jena f9

I had a hole in my DR wall to outside for the 800

Time

Good to know I’m not insane in my plan to turn part of my DR into a camera haha. I’d love a mobile setup like Ian Ruhter but while I learn the intricacies of the wet plate process I’ll settle for building a partition inside my DR and make that the camera.

[Drew Bedo]

Full Disclosure: I don';t know what I am talking about.

OK, with that said, I recall an old technology used in education where a "projection microscope" was set up to project an image onto a screen or wall so that a group of students could all see whatever it was on the slide. This would have been a ratio much larger than 2:1 right?

Can this basic scheme be used to project a larger image than would normally be thrown by a lens? And yes, light will be an issue..

[Dan Fromm]

Full Disclosure: I don';t know what I am talking about.

OK, with that said, I recall an old technology used in education where a "projection microscope" was set up to project an image onto a screen or wall so that a group of students could all see whatever it was on the slide. This would have been a ratio much larger than 2:1 right?

Can this basic scheme be used to project a larger image than would normally be thrown by a lens? And yes, light will be an issue..

Hmm. Yes, you could use a lens to project an image on a convenient surface such as a wall and then photograph it. I don't see a good reason to do this. The lens can also project an image on a sensitized surface such as film in a camera. The direct way seems much better.

FWIW, the "photograph an image projected on a surface" approach is used by some fanciers of tiny format digital cameras. They claim this is large format photography.

[Tin Can]

Most of us should remeber school slide show with much larger glass plates then 35mm and MF

I buy some made long ago

or NOS never used, let me repeat NOS




I need a new high rez DIGI wall projector

My last one is too old, 2003

[cpjfox]

I just stumbled on this while researching apo-tessars, by a forum member Dr Klaus Schmitt, unfortunately all the focal lenses are too short, but an interesting resource none the less.

http://www.macrolenses.de/

Does anyone have any information regarding the close focus of the big apo-Tessars? 900/9 and 1200/11

[cpjfox]

How long ago did you go to school? ;-)

Found this one from the late 1800’s

http://www.earlyphotography.co.uk/site/entry_V61.html