pushing Fomapan 100

I can't seem to find Fomapan 400 here, so I'd like to try pushing Fomapan 100 (135 format) two stops. I'll be developing in D-76, which is my normal developer, so I have an idea of what it does. Does anyone have any experience pushing this film, especially with D-76?

I know the Massive Dev Chart suggests in general to mulitply the time by 2.25 for a two-stop push, but what's throwing me off is this line in the Fomapan brochure:

The nominal speed of ISO100/21 C combined with wide exposure
latitude gives very good results even with overexposures up to 1 EV (corresponding to ISO 50/18 C) or underexposures up to 2 EV (corresponding to ISO 400/27 C) (exposure value), both without any change in processing.

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Any insights are much appreciated.

Bests,
Rick

What they are saying is applicable to most B&W negative films. There is a certain amount of exposure latitude usually about 3 stops. Because of this latitude you can still get good prints without making any adjustment in the development time. However, most films are forgiving of a 1 stop underexposure and a 2 stop overexposure not the other way around. In other words when in doubt overexpose rather than underexpose.

I've used this film relabeled as Arista EDU.Ultra 100. I pushed it to 400 and developed it in Acufine for 6.5 mins. You can see the result (there was a url link here which no longer exists)

To be honest, I didn't start out to do this intentionally - I just forgot to reset my meter from 400 down to 100 before shooting that roll. I turned to Acufine as I wasn't sure how Rodinal or HC110 (the 2 choices I had at the time) would handle it.

Nathan

stet said:

I can't seem to find Fomapan 400 here, so I'd like to try pushing Fomapan 100 (135 format) two stops. I'll be developing in D-76, which is my normal developer, so I have an idea of what it does. Does anyone have any experience pushing this film, especially with D-76?

I know the Massive Dev Chart suggests in general to mulitply the time by 2.25 for a two-stop push, but what's throwing me off is this line in the Fomapan brochure:



Any insights are much appreciated.

Bests,
Rick

Click to expand...

We checked the Fomapan 100 with the AM74 developer from Amaloco photochemicals.

Fomapan 100 on E.I. 400 can be developed with AM74 1+7 for 7:30min. at 20 degrees C.
You will have some loss in schadow detail, compared with Fomapan 400 in the same developer 1+7 for 6:00min. it's slightly worser although the effective E.I. for this film will not go over iso 320. But this is not so strange if you see the curves from the Foma website:
http://www.foma.cz/Upload/foma/prilohy/F_pan_400_en.pdf

AM74 is worldwide sold under Rollei H.S. label.
For some unkown reasons this developer works very well in combination with their R3 film in the E.I. 200 - E.I. 1000 range. (1+7)

AM74 1+7 works as depth developer, dilution over 1+12 till max. 1+19 it works in the surface. It's very easy in use, not critical, long shelf life and a lot of films are going with the same developing times:
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or
http://www.amaloco.nl/pdf/am74_fr.pdf
or
http://www.phototec.de/pdf/am_74.pdf

and on request I have also a Czech/Slovak version available

Best regards,

Robert

thanks for all the responses. I've also shot first to just ask questions later, but intentionally with bad planning

I'm not a subscriber, so I can't see your photos, Nathan. How did you like it?

Robert, Gerald: Thanks for explaining that and pointing me to the docs. Having gotten used to devving to the fraction of the minute for some films and D-76 and being given precise times for pushing, I'm weirded out by that line about latitude. And even that Foma gives a range of 6-7 minutes when rated at 100.

But at least it looks like if I'm going to add time, it doesn't have to be as much as the x2.25 that the massive dev chart says, which even states that it may prove excessive. I might try 8.5, roughly 20 percent more time, and just see what happens.

I've always been lazy about doing tests, but now I can see why that may help.

well maybe in that case our Foma developing table on our website could be informative:

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and some info in the Foma catalogue:

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best regards,

Robert