Showing posts with label microfilm. Show all posts
Showing posts with label microfilm. Show all posts

Sunday, June 4, 2017

Gone Microfiche-ing

Using expired film can be a bit of a challenge. There is usually some loss in speed, so the apparent iso (or the effective EI, if you like) is lower and it is up to you as the film adventurer to determine by how much. The rule of thumb says one stop for each decade past its expiration date. So assuming you know the expiration date and didn't just come across a random roll of film, you can use that as a starting point. Keep in mind though that 'fast' films (to me that means iso 100 and higher) will lose speed 'faster' than slow films. So if you have a roll of Ektar 25 that expired in 1997, that's 20 years (two stops lost), but since it was slow film to begin with, it probably didn't lose a full two stops. Maybe 1½ or 1 stop would be a better starting point. "So what's your point here Jimbo?", you may be asking. First, I don't really like "Jimbo", people called me "Jim" in college, but generally, it's just "James" and has been since Mr. Salyers' 4th grade class. Secondly, I'm getting there!

Periodically, I search for Kodak Dacomatic Recordak film to buy. I have some in the fridge and I really like it. So I just keep an eye out for a spool. I never find any. But then one day the search popped a result on the big auction site. It was "Recordak", but didn't say "Dacomatic". Additionally, it was 500 ft of 105 mm stock! Well, that seemed odd, so I did some more digging on the specific emulsion number (4462) and it turned out to be a completely different film (seems obvious now). This one was used for microfiche production. So it was copy film like the Dacomatic, but a different type. The price was right, so I went and bought it, hoping against hope that I could get pictures from it. It originally (expired 12/1979) was rated at iso 2.1! So, figuring that this stuff is really not very sensitive to light to begin with, I figured it probably hasn't lost that much speed even in almost 40 years, but I'll give it a stop anyway. That puts it right about iso 1. Okay, so I have an exposure starting point. How am I going to develop this stuff? It was designed with an automated proprietary development scheme in mind, so all I could find in the VERY sparse documentation was "Microfilm DEVELOPER and Replenisher". That's it. So I figured I would hit up the old stand by, Rodinal 1:100 and do a strip test to see if it would even change color. In fact it did! In about 15 seconds, it was fully developed!! So much for 60 minutes of stand development. Well, I cut a few sheets and took some of what I am certain were the best photos of my entire life and dunked them in what I had on hand, which was some homemade Parodinal 1:100 for 4 minutes. That is what I use for x-ray film and it works just fine. This microfilm however, was completely dark. Hmm... Maybe I over-exposed it? I tried again, taking more absolutely stunning photos at higher and higher speeds. Again, completely dark. So over-exposure was not the problem. It must be over-development. I cut the time in half. Still totally dark. I mean just a dark sheet of film... No image whatsoever. The strip test I did showed that the film cleared completely in the fixer, so it wasn't that the fixer was bad or the film was totally fogged.

I was just about to give up and call it a total loss, but I thought I would just try a different developer for grins. Rodinal variants have always developed anything I threw at them, including a roll of Ansco Plenachrome expired in 1949. But desperate times, you know. I had some X-tol powder laying about and that is a phenidone based developer, so I figured one last try. And this time, I would take a high contrast shot with lots of bright San Diego sky AND I would develop under red safelight by inspection. Did I mention that this film is orthochromatic? No? Well, now I have.

BAM!!!

Recordak-iso-1

I got an image! That was in X-tol 1:3 for 10 minutes. Now to see if I could get something with a few more grays in there. So I took a shot in the shade. I gave it a little more exposure because I had the bellows extended a bit, but I forgot about the reciprocity failure that was mentioned in the tech doc. The negative was very thin, but still there was a photo and it had much more scale to it. It is still quite fine grained and in 4x5 sheets that means some super fine detail can be had.

Retro Eveready Photo Cells

Now I've got about 490 feet left of this to see what I can do with this flavor of copy film. I'm looking forward to making some photos with this oddball microfilm.

Thursday, March 24, 2016

Fuji Super HR Microfilm

If you have accidentally stumbled across my blog and found yourself with nothing better to do than read it, you might know that I like to shoot expired film, and in addition I like to shoot expired non pictorial film. Non pictorial film is that film that was intended for other uses like radiography and copying documents. Recently, while perusing a large auction site, I came across some microfilm made by Fujifilm. This was truly microfilm in that it was 35mm film, but it has no sprocket holes. Most 35mm cameras need sprocket holes in the film for the winding mechanism and/or the frame spacing/counting mechanism to work. So needless to say, demand is pretty low for film without them. When I saw this film it reminded me of a 100'roll of sprocketless Konica 160 I have in the freezer that I have used in my Kodak Instamatic 500. Granted, I did have to add some spacing holes in it for the camera to work properly, but that's not too difficult. So my intention was to use this Fuji film in the instamatic. But I digress. What I want to talk about is what I actually did with this film when I got it. It is not unheard of to put 35mm film into medium format cameras and expose it edge to edge over the sprocket holes. Lots of people do that, so I thought I would do that with this film and not be bothered by the pesky hipster holes. So that's what I did. I taped it down to a 120 film backing paper. Getting it centered and straight in the dark was a challenge, but after a few tries rolling it up and unrolling it, straightening it out and re-rolling it, I finally got it all rolled up. I found it easiest to tape down the leading end, roll it onto a 120 spool and then re-roll it from the untaped end onto another 120 spool. That makes it so that you don't end up having to untape and retape the leading end because the film slid past the paper as you were rolling. I thought later of making some sort of a jig that would hold the paper flat and let me use both hands to align the 35mm film. That might be worth thinking about later. But today, I just need to show some pictures. These are full width 35mm taken in a 6x9 camera (Voigtländer Bessa) so 90mm wide. That is a fully manual camera with a viewfinder and range estimation focusing. On top of that, I had to sort of envision where the 'film' was in the viewfinder. So I was picturing a skinny mask running across the middle of the viewfinder in order to compose my shots. I got 8 shots on a roll which is good for me since I don't have a lot of patience. 36 exposures is torture. The film didn't have an iso rating marked, so I went to the googlz and found the spec sheet. From there, I found that the film's manufacturer recommends an iso of "medium". So, I figured "eh... 100??", but it expired in 2001, so I thought "ummm... 25??" So that's what I shot it at. I developed it in Adox Adonal (Rodinal) 1:100 for 60 minutes with 30 sec. initial agitation and 10 sec. agitation at 30 minutes. When I pulled the negatives out of the fixer, I thought, "Woah, that's a lot of contrast.", and it is, but not as bad as I initially thought. Most of the photos were shot in bright midday sun, so contrast is what you get. The first shot is fogged because I was taking too long to get it rolled up, but it turned out okay since it was a shot of a foggy landscape. :)

Bessa-HR20-007

This is a snake in the grass.

Bessa-HR20-006

Here are some more without the bad jokes.

Bessa-HR20-005
Bessa-HR20-001
Bessa-HR20-002

I hope you enjoy these photos. I sure had fun making them and am looking forward to having more panoramic fun with this sprocketless film.