Excelent George. I also use a pinhole camera and Fomapan will be my next film.
I have two questions, as a matter of curiosity:
1. How did you get the 50mm for a 0.3mm hole? I order a plate with 0,32mm (which I use) and I was advised to use 75mm as focal length.
2. How do you do the semi-stand? 30 seconds continuous agitation - minute 1 5 seconds agitation - minute 2 - 4 - 8 - 16 ?
Well, it is a matter of personal taste in relation to pinhole diameter, but I think that for 4x5 format 0,32mm is ideal for a focal length of 45mm - in my opinion. 45mm/0.3 = f150.
My procedure for exposure is to give an extra stop exposure by rating fomapan 100 at 50 ISO. For most conditions using 50 ISO and an f-stop of f150 will usually yield an exposure time of several seconds. You should be aware that fomapan is very prone to reciprocity and I find the following table very accurate:
http://consumptive.org/technical/Fom...ild_Effect.pdf
Finally, my semi stand method is as follows:
1. Pre-soak the film for 2 minutes at 20 degrees c (68 Fahrenheit) in plain water.
2. Empty the water and pour in the developer 1 part Rodinal to 100 parts water using gentle agitation (I.e. Swirls) for 20 seconds at the start and tap the bottom of the tank to dislodge air bubbles.
3. At 15 minutes I agitate gently again for 20 seconds and tap the bottom of the tank.
4. Finally, at 27 minutes I swirl again for 20 seconds for the final time and at 30 minutes I pour out the developer and fill the tank with plain water.
5. Pour out the rinse water after 20 seconds and fill the tank with fix. That's it.
I believe that this method of exposure and development is a gentle and very effective way of providing very printable negatives which have great shadow detail without burning out the highlights.
Thank you!
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