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i once 3d printed a 620 film spool because i couldn't find a second one for my brownie 620 jr. i tried printing it standing up but it fell over and was useless, so i printed it laying down, it came...

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https://www.youtube.com/watch?v=pNEyIt0yqUU
http://cdn.makezine.com/make/scannercamera.pdf

i have found a convertible lens is a good solution (i have a Schneider Symmar 210 mm f5.6 Convertible)
you only have to carry one lens but if you need a longer focal length you can have it.
also...

i have never seen x-ray that big, the largest i have seen are 14x17 and 14x36

you could cut this in half
http://www.bhphotovideo.com/c/product/894178-REG/MultiTone_mol162025_MultiOrtho_16_x_20.html
or you could use regular photo paper.

it looks like edge effects from using a small tray to me.
was the path/road that color?

+1
a bike and trailer or a cart is necessary for really heavy stuff or long distance.

im not an expert but they look like the same optical design to me, both are (from the subject) cemented biconvex - planoconcave , air gap, cemented planocovex - biconcave - planocovex, air gap with...

just got this last weekend at the PHSC sale.
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http://leicrom.es/?/Idioma/CAS/Seccion/Inicio/Categoria/Scanner/-1/Ver/Imagenes

http://petapixel.com/2013/03/04/hacking-a-rolleiflex-tlr-to-shoot-fujifilm-instax-instant-photos/
this guy put instax film in plate holder, a similar thing might work in a sheet holder (only if you...

most xray is double sided so it doesn't need notches.

i am a bit embarrassed to share this
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most of the time this room is a bathroom, the enlarger is a durst m600 i got from value village the counter is just big enough for 3 8x10 trays and the...

has anyone mentioned this,
http://www.re-inventedphotoequip.com/ULF%20Lens.html

i should cover just about anything.

i doubt it would work for normal photography.

you are right, its circle is 4 feet 8 inches

http://www.re-inventedphotoequip.com/Data.html
this 1000mm has about a 3foot circle, might be ok

you want a positive one, this will explain it better than i can.
http://www.nightlase.com.au/education/optics/lenses.htm

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it looks like what ever it was it didn't affect the area under the tabs in the holder so i think it happened while it was in the holder.

some 110 snapshots taken with a spykids 110 toy camera on Lomography Color Tiger 200
scanned with a smartphone, that is where the strange distortion comes from (i can't figure out how to hold the...

You could certainly 3d print the standards for a odd format.
the biggest problem is the printable area, consumer printers are probably too small.
you would probably want to add the rail after...

http://www.shapeways.com/model/1327840/pinh5ad-the-3d-printed-4x5-pinhole-camera-kit.html?materialId=6

this is a 3d printed 4x5 pinhole, i assume you could do something similar with a real lens.

Does anyone have any experience with these fake Cokin P filters on ebay like this one (there are a lot of sellers)...