Re: Use of X-ray film: technical discussion with example images
Quote:
Originally Posted by
Rubud
Some quick tests using my 4x5 pinhole.
AGFA Curix Ortho exp 2005 @ EI 64 developed 7mins, Kalogen 1:100 using a MOD 54/Patterson tank.
The films came out fogged but scanable though I'm unsure whether it's age, unsafe safelight or that my blackout hasn't completely blacked out the newly erected street lights facing where I cut the film. The writing on the second has me stumped.
I'm relocating to the laundry (no windows) and have adapted Daniel's/Jason Lane's idea of utilising a 3w red LED bulb filtered through a red lighting gel equivalent to a GBX filter. Hopefully I'll have some answers.
Attachment 232377
Attachment 232378
Attachment 232379
Attachment 232380
Old badly stored Film?? Try processing a sheet no exposure; should be clear as scotch tape if the film is good; sometimes damage can add to an image. Depends
Yep that safelight looks mighty mighty deep red, just like mine. You can lay pennies on the film periodically, to test it's tolerance exposure to the safelight. Also it's bright enough to see film shadow detail as it is developing. Developing by inspection, I lift a sheet up to examine it by safelight
Re: Use of X-ray film: technical discussion with example images
Quote:
Originally Posted by
Daniel Unkefer
Old badly stored Film?? Try processing a sheet no exposure; should be clear as scotch tape if the film is good; sometimes damage can add to an image. Depends
Yep that safelight looks mighty mighty deep red, just like mine. You can lay pennies on the film periodically, to test it's tolerance exposure to the safelight. Also it's bright enough to see film shadow detail as it is developing. Developing by inspection, I lift a sheet up to examine it by safelight
Thanks very much for your suggestions (and for sharing your safelight idea). My first inclination is that the film is old (there was one batch where the emulsion peeled off as soon as it got wet). The chap who gave it to me did say that it had been sitting around the storage area for some time. Once I've got the laundry completely light tight I'll cut a sheet in darkness for the tank and then do some safelight tests. If the worst case turns out to be age related I'll be content and will work around it as I do with other expired film.
2 Attachment(s)
Re: Use of X-ray film: technical discussion with example images
It looks as if my earlier issues are more the result of unsafe lighting than old film. In my new environment (Laundry) & safelight setup, I cut a sheet in total darkness, loaded one into my Patterson tank and did a safelight test strip on another in 2min increments for 10 mins, loading the tank in total darkness. Developed in Kalogen 1:100 7mins. I can't see any discernible difference between the blanks which are both a giant improvement on my previous efforts (I was using my computer monitor as a lightbox so the left may look a little darker from the angle I photographed).
Attachment 232417
Attachment 232419 (Scanned using an Epson V850)
Re: Use of X-ray film: technical discussion with example images
Pulled out the 5x7 and some Carestream x-ray film to practice and check exposure with my hot lights. Next week there is a "Roaring 20's" themed event I am attending and I'm going to do some fun portraits of attendees dressed in period style using the Eastman View #2 and Verito 8 3/4." In fact I just checked and according to an online database the Verito was made in 1924, and the Eastman produced through the mid 20's, so very period correct, other than the film! :)
The test image, of my wife, wide-open and at 1/10:
https://blogger.googleusercontent.co...v22-meg-2s.jpg
Re: Use of X-ray film: technical discussion with example images
Nice. I am discovering 5x7 myself.
https://live.staticflickr.com/65535/...b6460973_b.jpgSONY DSC by Nokton48, on Flickr
This is the Fiskar Cutter Jim Galli directed me to. Bought cheaply on Ebay, got four new 45mm blades at the local fabric store. Great cutter! I see why he likes it! Here is my cutting setup, set up for cutting 18x24cm sheets from the huge roll of 24cm Agfa Aviphot. Same emulsion as Rollei 400s, basically. Identical if not the same. Has some slight Infared effect that is very pleasing. I've been shooting this film as Rollei 400s in fresh 70mm, and I like it. Between the Mammo Film, Agfa Aviphot, and Fuji HRU I am all set for cheapo 8x10 size shoots. Something I can do in winter times. I have eight 18x24cm original olde wooden Sinar Film Holders that are perfect for shooting this stuff. If I contact print on 8x10 paper, it makes a nice wide black border that I like.
Of course I have to spin the plastic cylinder of film so it is oriented for easy cutting. I will set up some wooden stops to hold the biggie roll so it doesn't slide around in the dark. That's about it for now
The Fiskar's blade goes into 45 pivot mode so no way to scratch the film. Good design
1 Attachment(s)
Re: Use of X-ray film: technical discussion with example images
I had an issue I posted about a few days ago- black dots on the photos. I eliminated everything and it ended up being the film, probably due to poor storage. I did allow it to get to 80F and could have been too humid.
I’m now trying agfa cp-gu m from cxs. I tried some overcast shots today and it appears to be iso 25 (with d76 1:6 9.5min with hangers)
Here’s a shot from yesterday. Attachment 232608
Re: Use of X-ray film: technical discussion with example images
I also would like to share that I’m using a rotatrim m24 to cut down 8x10s to 4x5. I have two paper safes. One I fill with the sheets I’ll cut. I start by setting the cutter to 125mm and cut down the half sheets, store them in the other paper safe. Once that’s complete, I turn the lights on, adjust the cutter to 110mm, then go back and cut the rest of the film to size and put in a 4x5 box. I recently got a kodak model d safelight which came with the GBX2 filter. I found it had a 75w(!) bulb but it still doesn’t fog.
Edit: I need to run fog tests.
2 Attachment(s)
Re: Use of X-ray film: technical discussion with example images
I've been using a Carl A3 rotary trimmer using magnets as a guide for cutting down paper & film. One magnet is at 4in in the top and another at 5in on the bottom. It's an idea I stumbled on recently but it seems to work.
Attachment 232676
Re: Use of X-ray film: technical discussion with example images
Very good idea!
I have a roll of magnet tape, I use for ULF
I keep 2 cutters for film cut usage only, in a dust free metal drawer
Thank you
Quote:
Originally Posted by
Rubud
I've been using a Carl A3 rotary trimmer using magnets as a guide for cutting down paper & film. One magnet is at 4in in the top and another at 5in on the bottom. It's an idea I stumbled on recently but it seems to work.
Attachment 232676
Re: Use of X-ray film: technical discussion with example images
Quote:
Originally Posted by
Corran
Pulled out the 5x7 and some Carestream x-ray film to practice and check exposure with my hot lights. Next week there is a "Roaring 20's" themed event I am attending and I'm going to do some fun portraits of attendees dressed in period style using the Eastman View #2 and Verito 8 3/4."
And...some results! Well, I cheated though. I recently purchased a 200mm and 250mm Imagon set and I put the 200mm in a Copal 3 shutter I have here collecting dust. Works on the 5x7 and soft focus is nice, but noticeably wider than the Verito, which I needed for group shots. I should've switch to the Verito for this image, but my friend wanted to take a photo of my wife and I dressed up for the occasion, so I just used what was on the camera at the time as I had only about a minute to set this up and show her how to trigger the shutter.
Cropped square though - 5x7 Eastman #2, 200mm Imagon, on Carestream x-ray film:
https://blogger.googleusercontent.co...asy-0986ss.jpg