I think so, I think that reciprocity failure is an intrinsic property of the chemistry of the silver chloride/bromide in films and printing papers.
Printable View
I think so, I think that reciprocity failure is an intrinsic property of the chemistry of the silver chloride/bromide in films and printing papers.
Wow, James, I’ve never used paper that I was able to rate at 100. The best I experienced was Galaxy Hyperspeed paper which I rated at 24 (but Galaxy seems to be long gone). Hope you enjoyed the articles. I’m still learning too :)
Peter, in my exposures I’ve never added any additional time for reciprocity and the images have always come out fine. My longest exposure was a little over 60 minutes but I routinely shoot exposures 1 or more minutes long.
A couple of test shots with my new 4x5 Graflex RB Series B (scanned and inverted in PS).
https://farm2.staticflickr.com/1967/...ea448724_b.jpg
https://farm2.staticflickr.com/1949/...2d858d9a_b.jpg
I might be wrong - However I set my spot-meter at 100 ASA (ISO) and made a few test images. The best one was at f-11 1/50th of a second and ISO= 100. I was very surprised at the outcome. I think that this paper INDUSTRX is the fastest that I have aquired - and Now I Want MORE.
No paper will ever come close to ISO 100. That's just beyond the reach of a bromide emulsion.
Thanks Don. Yes, I have shot 4 mins / 8 mins around sunset since with no problem.
(Well the problem then becomes the reciprocity of the day, by 2/3rds through the exposure the EV had dropped by one and the exposure it should have had was exponentially longer :) )
https://farm5.staticflickr.com/4904/...13c6b470_b.jpg
Old track by Peter Brooks
Canham 5x7, TTH RVP at f8, pre-flashed Ilford Mutigrade IV Glossy at ISO 3. A 15 second exposure at sunrise. Scan, inverted in PS.
I'm enjoying the 'top hat' style made possible by the slow paper speed. Bah! Who needs a shutter? (I do, most of the time...)
beautiful, where is it, approximately?