View Full Version : Infrared LF films

David Spivak-Focus Magazine
20-Jun-2007, 22:52
A photographer acquaintance of mine was thinking about trying Maco 820 large format IR film. She has a couple of questions that she asked me if I could find some answers for:

First, has anyone tried this film? What were your results? What filter, if any, are you using to shoot IR using and what is the filter factor of that filter? Do you develop it yourself, or can you recommend a lab in NYC to develop LF IR film?

Thanks in advance for your help.

21-Jun-2007, 00:19

Brian C. Miller
24-Jun-2007, 10:38
Another Maco thread (http://www.largeformatphotography.info/forum/showthread.php?t=25212)

Sample photos thread (http://www.largeformatphotography.info/forum/showthread.php?t=23858&page=4)

Filter used is B+W 092 or Hoya R72, EI is 3 or 6, and development is Xtol 1:3 for (I think) 14 minutes. Basically, the image will be really contrasty with normal development, so any technique to bring the contrast down is OK.

When the Maco film first came out on the market I found that I had to keep the "wet" time short, as the emulsion would distort. I haven't retested that yet.

al olson
24-Jun-2007, 18:02
I have been testing the MACO IR roll film in my Bronica to see what kind of results I get before I burn my box of MACO 820 sheet film.

For or five years ago I tried MACO 820 roll film with a Wratten A and through the filter metering at EI 100. I had it processed by my lab in HC-110, dil B, according to MACO specs for 5 minutes. The image was so thin it was nearly invisible. The next roll my lab doubled the development time and the image was normal, in fact it did not appear to have an IR effect at all. I went back to Kodak HIE.

This week I shot another couple of rolls of MACO in the Bronica with a Cokin 007 filter that is supposed to be similar to 89B with a 50% cutoff at 720nm. I metered for EI 3 and EI 6 with my Sekonic. They were developed in D-76, full strength, for 8:30 minutes. (This is in accordance with the instructions printed on the inside of the box.)

The EI 6 frames are so thin that they are nearly clear. The EI 3 frames are also quite thin, but the scanner with the help of Elements pulled out quite a bit of detail. It remains to be seen how they will print.

Note that the Pagosa Peak image has pretty fair tonal range. This was the best image at EI 3. The Summitville image, also at EI 3, loses a lot of shadow detail, although the texture of the snow is preserved.

I think I will try the next roll at an EI of 1.5 and perhaps increase the development time as well.

Gary L. Quay
25-Jun-2007, 01:19
First, I tried this film with a #25 filter, developed in Clayton F76+ for 11 minutes, and got results not worth writing home about. The next time I used it, I developed it in PMK Pyro, and got some descent IR effects, but the negatives were uneven. I'm going to try HC110 next. I'm also going to invest in a darker filter. Otherwise, I'm not impressed. Yet.

As an aside, I would postulate that a good way for God to prove that he exists would be for Konica IR 750 to miraculously return to the market.


25-Jun-2007, 08:44
Use it quite a bit in 4x5 - EI for me with a 72IR filter is 6. good IR effects - don't shoot at mid day. http://www.hovation.com/assets/oldirbanch1a.jpg
Develops OK in D-76, Microphen, XTOL