Recent content by Evan_Mathis

Totally agree. I jump between silver paper and platinum and scans of course, so for myself, i want the closest EI to what my meter read and what the result is in my developing process. That way it * should * work for pretty much whatever im. doing, but then I can adjust my process if i know...

This is super interesting to me, and thank you all for for the info, and it seems like I'm tapped in to the actual source here.... (I wish I had found this thread like 6 months ago) I was working on my own way to log / graph / compare my film processes and it started pretty simply. I had shared...

Next version will be a comparison to a more bog standard developer, probably D76

OK an update. A larger grey card made a big difference. A couple of quick notes: I did process all of these together in the same tank for the same length of time. The Massive Dev Chart recommends18min for Acros II, and 16min for Delta 100 in PyrocatHD when shot at box, which accounts for the...

The manufacturer recommends emulsion toward the sensor, so that's what I do.

For reference you can see here how close the grey card is to the reader on the densitomoeter, because that's as close as the 40mm Nokton can get and stay in focus with a 4x6 Calibrite grey card. I literally just picked up a 35mm to be able to do these sorts of comparisons so there are still some...

I went and re-read all of the previous grey card exposures shown before. it seems like the 35mm was affected more, probably because of how small the grey card is in the neg. Note to self to use a larger grey card for the next tests, as I think that's having some affect because the border on the...

Ha, you're absolutely right, and I think I've found the issue: there was a bit of packing styrofoam on the underside of the densitometer reader lens. I was trying to figure out why my readings were so inconsistent. I discovered it when I went to read the calibration wedge that came with it, and...

This is what I'm doing. I'm also testing the logging and charting app that I've got in beta so that I can compare different combinations of film, developer and processing to document their effects on the negative characteristics.

yeah at the focal rage i was at i normally compensate about 1/2 stop, which would have been expected. I'm going to run the next batch with a bigger grey card to take that variable away.

I'm metering and taking the densitometer reading from the center of the grey card. I can show you the whole strip of negatives... there's no information on the first 3 exposures of the 120 Acros wedge test. I'm only starting to get information at what should be zone 4.

that's a super valid question and the answer is no... I meter normal with aperture priority targeting +5 from the smallest fstop because I find aperture to be more reliable than shutter speed. then i work my way up to +4 from normal by increasing shutter speed once i hit the widest aperture...

Yeah the 50mm Sekor C I used with the 120 on this run is dead on with the shutter and fstop as of a year ago. The Leica had a DAG overhaul and was tested 2 months ago. The meter is is a 2 year old Sekonic 858 (rip old Digilite 328, you served me well)

And I am going to re-run this test both with Delta 100 and Acros in both 35mm and 120 at some point this weekend. I appreciate the feedback, even the less constructive stuff. Just curious if anyone had run acros(s) a situation like this with the same films in different formats before.

For clarity, I processed 5 rolls in the same developer batch. Expired 35mm Neopan SS (green), New 35mm Neopan Acros II (blue), "New" 120 Neopan Acros II (yellow), 120 Ilford Delta 100, and some ancient Rollei Retro 100 (orange). The Rollei seemed like it was a touch fast, but that was expected...