MICROFILM AS CONTINUOUS TONE

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David Lyga

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Perhaps this will appeal to some out there. I recently answered an ad from the Pennsylvania Historical Society offering, for free, twelve 100 ft rolls of 35mm Kodak Imagelink HQ. I was lucky enough to get it. I tested it and was very pleased with the predictable results. First, for continuous tone results, I rate the film at an exposure index of 6. (Some will want to rate it at 12.) Admittedly the film has a rather poor latitude, meaning that taking continuous tone pictures of high contrast scenes (sunny day with shadows) will provide negatives having almost no shadow detail. That is a drawback. But for normal contrast, or, even better, for low contrast scenes, the film is superb. The resolution is astounding and the grain is non-existent. Figure on processing this film for about 60% of the time used to process Ilford's Pan F+. If the times are too short you can dilute the developer with an equal amount of water and do clip tests from that point.

Now for the bad part: the 35mm film is not perforated, meaning that the entire area (no printing is on the film) is available for image capture. But, also, that means that the film will not run in a 35mm camera normally because of the lack of sprocket holes. However, being curious and not wanting to NOT be able to use the film, I did the following. In the dark, I cut off a measured twenty inch length and gently wrapped it onto the take-up spool (attached to the film advance lever) in my Spotmatic. I did not use tape and started from the outer side of the spool (near the right edge of the camera). It took only a minute or two to do this. Then I drew the unspooled end of the film across, and over, the sprocket spool onto, and across, the film aperture area. To complete the process, with a bit of Scotch tape I taped the film onto the rewind spool; then I closed the camera back and turned on the lights. The fact that the film gently glides over the sprockets does not cause problems. The first exposure is already set up after you cock the shutter. To make each subsequent exposure you do two things: first you cock the shutter (which does not move the film a bit) then you 'rewind' one full revolution to get a nearly precise 38mm movement of the film (slightly more than the 36mm length of the negative). You get about twelve exposures this way. You can then load this standard width onto the reel of your choice for processing.

Alternatively, there might be even better possiblilties for the 2.25 square format. Again, remember that the entire 35mm width is available for image capture. I do not see why this film cannot be rolled (without paper backing) onto 120 spools (but, first build up the inner edges of the 120 spools with a flexible plastic or other material in order to allow a precise, central, 35mm width (to assure centering of the film onto the camera's larger film aperture). The film is very dimensionally stable as it is 5 mil thick. The format thus optained would be a very respectable 35mm X 56mm, yeilding a size appropriate to medium format capabilities.

I was so impressed with this capability that I decided to do some research into the purchase of additional rolls. I finally found someone who 1)does not think that microfilm is ridiculous in this digital age and 2) offers a combination of price and service that is above 'acceptable'. The firm is Inception Technologies, Inc (inceptiontech.com) and the salesman is Don Haddad: email is dhaddad@inceptiontech.com. The location is 1 Sundial Ave, Suite 214, Manchester, NH 03103. The phone is 603.222.2202 ext 212 or toll free: 877.475.2580. Yes, there is a drawback: although the Kodak Imagelink HQ film is only about $17 per 100 ft roll, it must be purchased in 20 roll quantities. BUT....there is another possiblilty here if you can buy quantity. He also sells a product called Kodak Professional Microfilm, Type One, which is simply repackaged Imagelink HQ (repackaged by Kodak, incidently) and is only $13.20 a roll (but a full fifty rolls must be purchased) for a total of $660, including UPS ground delivery within the continental US. I bought this fifty roll lot and I tested it against the Imagelink: It is the identical product and I am pleased with both the film and the service. Of course, all must be aware that film cannot be returned (as is the case everywhere) unless defective (as is everywhere).
 
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mgb74

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Here's a formula from John Brubaker that worked well with Agfa Copex microfilm (16mm) rated at ISO 50 - though it was best to avoid high contrast subjects:

Mix a Sodium Sulfite solution of 2 oz Sodium Sulfite to 1 liter of water
Mix 2.5mm of HC-110 (concentrate, not stock solution) to 200ml of Sodium Sulfite solution
Develop for 6 min at 68 degrees F with agitation every 30 seconds.

Perhaps a useful starting point
 
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AgX

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Using Microfilms for pictorial use is not ridiculous at all. You can get customized developers for that as well complete combos of film and developer. The speed of those combos is ranging from ISO 15 to 64 however.
 

dynachrome

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David, A few years ago I bought a 20 roll carton of Imagelink HQ film. Each roll was 100 feet long and the film had normal 35mm perforation. I sold 18 of the rolls at my cost to fellow photo.netters. Last year there was a thread on apug about unperforated 35mm film. A fellow apugger sent me a modified Konica Autoreflex camera. It uses a sprocketless film advance system and will provide the normal 24X36mm frame on unperforated 35mm film. At some point I will send the camera to Greg Weber to have it overhauled. The "bumper" which is part of the shutter mechanism needs to be replaced. If you would be willing to part with some of your unperforated Imagelink 35mm film I would be interested in buying some. As recently as 2008 I contacted a few microfilm sellers who still had the perforated 35mm stock. Between the apug and photo.net enthusiasts I should have enough interested shooters to split up a case of the film.
 

Ektagraphic

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I buy a roll off of someone if they jump on it....I have always wanted to experiment with mircofilm. I think the idea is so awesome!
 

bwfans

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Does anyone has any suggestion on which 35mm camera is best suited for this kind of non-perforated 35mm film?

The price is great but the use is quite limited due to non sprockets.
 

bdilgard

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There are a number of 35mm cameras suitable for this film, they are called 828 or Bantam cameras :D.
 
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David Lyga

David Lyga

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sprocket holes 'get in the way'

One of the great 'crimes' of 35mm development through the ages was the constant presence of sprocket holes (to allow a vigorous movie film that was not necessary with still cameras). As a result, each and every frame uses only 24 of the 35 precious millimeters of width. The waste is really appalling if you do the numbers. With present lenses one could have easily obtained a 35 x 36 square format if this had not been the case or an even more rational 35 x (say) 25 'ideal' 35mm format. This would have obtained perhaps 60 shots per 36 exp roll.
 
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David Lyga

David Lyga

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Converting 35mm cameras to allow transport of unperforated film I have already explained: the film is run in reverse using the rewind knob to allow film to enter the rewind spool. Cocking the shutter does not move the film because the film is not attached to the spool that is attached to the normal film advance lever, only to the rewind spool.
 

AgX

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David,

At first sight those perforated edges seem a great waste of film.

But, unless a vacuum back is used:

-) some film area has to be spared for the pressure rails, to ensure focal plane,

-) it has been stated that guiding- and "pressure"-rails combined with an inbetween recess are beneficial for film flatness (though this is hard to believe), which even uses more film area.
 
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2F/2F

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Sounds cool. I would love to run some non-perf film through my Blackbird, which shoots 36x36.
 

bwfans

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Sounds cool. I would love to run some non-perf film through my Blackbird, which shoots 36x36.

Does Blackbird use sprocket to advance the film? May be regular 120 camera like Holga will be a better idea if 35mm film cartridge can be fit inside film chamber?
 

2F/2F

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Does Blackbird use sprocket to advance the film? May be regular 120 camera like Holga will be a better idea if 35mm film cartridge can be fit inside film chamber?

It does not use sprocket holes to advance the film, but it uses them for the frame counter. You can count clicks or turns and get it to work with non-perf film.

You can rig 35mm in a Holga without too much trouble. However, Holga images don't look like Blackbird images. I highly prefer the Blackbird, myself. I had a Holga flash for a while because it was a gift from someone who bought it but did not use it. I shot a few rolls, got bored with it, and passed it on to someone else. It is still pretty new, but I have not got bored of the Blackbird yet.
 

clayne

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Here, I'll throw you guys a bone. If you want to use non-perforated 135 film, pick up a cheap Canon Rebel film camera. A good amount of them don't use sprockets for film transport. I believe the EOS Rebel X does not. Couple this with a Nikkor adapter, if desired, and you're ready to roll, non-perf style.
 

Mike Wilde

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Misissauaga
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Loading it onto 120 backing paper and running it though MF camera can give nice arty panorama, with edge markings and frame numbering superimpoed onto the final image.

I have seen good images of this from David White, who has done this, albeit with perforated conventional film.

The possibility exists with the microfilm product that there may not even be edge or frame markings.
 

Antonio Banfi

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Nov 11, 2009
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17
Location
Milan
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Large Format
Some years ago (2005) Donald Qualls told me the following about Imagelink, I cut&paste:
I've used Dilution G (1:63 from US syrup, or 2:3 from Dilution F if you have the Euro version). I shot at EI 50, because I wasn't confident of my hand holding with tiny negatives at EI 25. My best time was 20 minutes at 21 C, continuous agitation for the first full minute, then
10-15 seconds every 5 minutes. Negatives look somewhat thin (largely due to the clear base), but scan well.


Tested and worked good for me.
Regards
A.
.
 
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