Sink Development Push/Pull Charts

As I get more organized, I am starting to create some push/pull times for development based on film stock and developer. These calculations are related to developing sheet film in a large tank or tray. Development times for small formats (35mm / 120) will be different. I plan to update with more stocks and chemical recipes as I go. In the charts below, n is the recommended normal development time at 68°F. The +/- of n is the amount needed to push/pull based on the Zone Metering difference between highlights and shadows (roughly 20% per). There are many methods for determining the n and many variances within similar methods. So, you may read many different things on the web. But this is how I have been doing this, and I have been very happy with the results.

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Pulling Ilford HP5 Plus

Ilford HP5 Plus 400 (4x5) is very new to me, but I have heard how well it works with portrait work and how nicely you can push and pull it. This weekend I wanted to put it to the test by shooting a situation where I would need to pull it in development. I ended up shooting a few situations (just three different shots) and developed each sheet differently (ranging from n-0 to n-2 development times), but this turned out to be my favorite example.

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Return to Film

Today I received my first set of scans from Richard Photo Lab in California. These scans are my test rolls from the Hasselblad 500c (color shots) and from the 1950 Rolleiflex TLR (B&W shots). The color was Kodak Portra 400 and the B&W was Fuji Neopan 100. I have to say, I am quite impressed with the results!

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