ISO of vc paper : LUSENET : B&W Photo - Film & Processing : One Thread

I will be using vc printing paper to take a paper negative using a pin hole camera, f 360. Do you have any suggestions for a reasonable ISO rating for vc printing paper, e.g. Agfa Premium RC paper?

Louis Jensen

-- Louis Jensen (, March 27, 2002



It's going to be slow, somewhere around EI 3 or 6.

Regards, Pete

-- Pete Caluori (, March 27, 2002.

Most makers give an ANSI/ISO speed rating for their papers these days. The ISO paper speed is approximately 1000 times slower than the ISO film speed. In other words, an ISO paper speed of 500 would be rated at around 0.5 ISO in terms of film speed.

-- Pete Andrews (, March 27, 2002.

ISO 3, f360 ???? Nice experience, but you better shoot in a place where the teotonic plates don't move much. Keep us informed.

-- Roger (, March 27, 2002.

I base my paper negative pinhole images on a EI of about 6 as this is as low as my spot meter goes. Somewhere I obtained info for reciprocity multiplication factors, thought it was at but can't find it. I tend to guessimate from a known (successful) exposure for that combination of f-stop/camera. In practice, with my 5x7 pinhole I usually use 1 min exposures. Couple of weeks ago I test drove my newly constructed 8x10 and due to a larger pinhole, 30secs was perfect. Here's the result

-- Nigel Smith (,au), March 27, 2002.

bugger.. you'll have to cut'n'paste that URL :(

-- Nigel Smith (, March 27, 2002.

You forgot to enclose the URL in "quotes" Nigel.
Here's the link again.

-- Pete Andrews (, March 28, 2002.

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