Not sure what "app" you are using for reciprocity adjustments, but doing 8x10 format means that you'll probably be doing a lot of them. If you go to Ilford's website and use their adjustment formula for its films, your 15 second measured exposure adjusts to a real time exposure of about 38 seconds for HP-5+, not 51 seconds. Shooting medium format, I don't need to make these adjustments often, so I sat down with a calculator and did the comps for measured exposures from 1 to 500 seconds for both HP-5 and FP-4, then made myself a table in word processor to runoff a few copies and stash one in each camera kit.
Thanks for taking the time to look this over. I'm using the Reciprocity Timer app on the iPhone. This photo was taken with FP4+. I must have misspoke if I said HP5. I was happy with the results at 51 seconds. I'll check out Ilford's site for this info. Thanks for watching!
Per Ilford for FP-4, the adjustment for a measured 15 seconds would be about 33 seconds exposure. My prior reference to HP-5 my have been my own misunderstanding, not your misstatement.
That waterfall shot came out really well Spencer, plenty of detail and well balanced.
+Steve O'Nions Appreciate the kind words and thanks for watching!
One shot but a good one. Enjoyable video, thanks.
+Derek Winsor Appreciate it! Was a hot day, I'll be going back soon.
Very nice shot! I like the composition and the tonality
+Jakob Olszewski Thanks! It's a great venue!
Nice image Spencer, total respect for you out in that heat.
+Bill McCarroll Thanks! Looking forward to winter!
Loved the video and the photo is fantastic! Watched the video on Facebook, but it's even better on UA-cam!
+Kathryn McDaniel Appreciate it, UA-cam makes it easy to see in high def.
Not sure what "app" you are using for reciprocity adjustments, but doing 8x10 format means that you'll probably be doing a lot of them. If you go to Ilford's website and use their adjustment formula for its films, your 15 second measured exposure adjusts to a real time exposure of about 38 seconds for HP-5+, not 51 seconds. Shooting medium format, I don't need to make these adjustments often, so I sat down with a calculator and did the comps for measured exposures from 1 to 500 seconds for both HP-5 and FP-4, then made myself a table in word processor to runoff a few copies and stash one in each camera kit.
Thanks for taking the time to look this over. I'm using the Reciprocity Timer app on the iPhone. This photo was taken with FP4+. I must have misspoke if I said HP5. I was happy with the results at 51 seconds. I'll check out Ilford's site for this info. Thanks for watching!
Per Ilford for FP-4, the adjustment for a measured 15 seconds would be about 33 seconds exposure. My prior reference to HP-5 my have been my own misunderstanding, not your misstatement.