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More Trains, and some thoughts on 645 format photography

I finally developed the black-and-white film from my day at the Bluegrass Railroad Museum. I used good old Kodak Plus-X 120 film developed in HC-110, a great eco-friendly developer around since the mid-1960's. Even Ansel Adams used it exclusively. I like it because of its extremely long shelf life, and I only have to mix what I need for the day instead of making a large bottle that I have to rush to use before it expires. I shot all these on a Bronica ETRS medium format 6 x 4.5 camera. It has interchangeable film backs, which means I can take one shot in B&W, then remove that film back and put another completely film back on, like color. You get 15 shots per 120 roll, as opposed to only 12 with a 6x6 square camera, or 8 with a 6x7 camera. The negative is several times larger than 35mm film, and 10's of times larger than the typical digital camera. If I scan a 6 x 45 color negative at full optical and digital resolution, my files would be 500 mb, that's 1/2 a Gig! Compare that to my Pentax DSLR that produces RAW files that are 24mb, or about 21 times smaller.