Recent content by outofzone

I understand your point. The data is actually surprisingly accurate. If I develop two wedges with different exposures, they match up really well in the overlapping parts. Edit: Sometimes Step 21 doesn’t represent base+fog, so I always measure it separately. The numbers might get shifted in your...

Just a few days ago I drew this and printed it a couple of times. My darkroom uses a cloth on one side, and the ventilation creates negative pressure that pulls it inward. I wanted to prevent that with the vents. You have to find out how many bendings (5) and the distance (4mm) between them...

I’m not always using the same exposure when I shoot the step wedge. Sometimes the exposure changes because I tweak the sensitometer setup, and sometimes I intentionally expose differently depending on the film speed (e.g., ISO 50 vs ISO 400) to make better use of the wedge’s range. Both...

Hey Rene, thank you so much for your work! It´s great I would like to request the option to have different logH for each curve.

A lot of time has passed since my last post. There were some major real life events (moving, building a new darkroom, and other personal stuff), but I’m finally ready again to continue. Thanks again for all the input so far! New toys In the meantime, i picked up some new tools Techkon TD120...

Today I tested the Foma100 in 7min FX-55 I am still a bit confused about the lack of density, but the curve from "the naked photographer" also end at d=1,8. So I guess this is just the film. I will move forward to finding the times for Kentmere 400. Tested with Nikon F90X, Foma100, FX-55...

@pentaxuser As I have a couple rolls of exposed Kentmere 400 with different EI, I may divert soon to another method. I just like the idea of using a step wedge to get so much information from a small piece of film. In my head I only must get one “real” number from a Zone? Exposed frame with a...

Thanks Koraks for your answer as well. I did the drying method to figure this out. The resolution with the ISL Sensor gets a bit low with higher density. I plot the calibration data in excel and use a formula to calculate the density of the negatives. The result is almost perfectly...

Thanks, Milpool for your reply. I have to say I struggle a bit to understand all of your answer. I’m new to this topic, can you recommend some articles/books to learn in more detail? I got most of my information out of the “Basic Photographic Sensitometry Workbook” from Kodak. About the...

Intro I like to share my journey so others can hopefully profit from it as I did with other Forum posts and websites. I would also love some feedback and help with interpretation of the data. The goal I like to have the ability to create H-D curves. With them I want to get the right development...