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06-01-2015, 07:52 AM   #1
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Pentax 645 iso 400 vs Spotmatic iso 25

Can I say "I don't need to get a Pentax 645 to get nice 11x14 enlargements. I can use very fine grain film like Rollei-25 with a 35mm Spotmatic and get about the same results as a Pentax 645 with iso 400 film." ?
Am I missing something?

06-01-2015, 08:13 AM   #2
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Enlarging to 11x14 inches from a 24x36mm negative is stretching less image data over a large area than it would be with a 56x41mm negative. No matter what you do in 135 format, if you do the same in 645, you get more. But, if enlarging to 11x14 inches from your high-quality 24x36 negative produces the results you are seeking, you probably don't need the "more".
06-01-2015, 09:36 AM   #3
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You could rationalize not getting a 645 for that reason but you can get fine grain film for the 645 like Ektar 100 or Velvia 50. In those cases, there is going to be a noticeable difference in favor of the 645.
06-01-2015, 12:41 PM - 1 Like   #4
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Keep the spotmatic and stop trolling.

06-01-2015, 01:13 PM   #5
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Digital systems caught up to the Pentax 6X7 many years ago. Since then, the gap has widened a lot. I can do bigger prints with my k-5 than I did with my 6X7. Also, I have several stops more dynamic range available with digital. There is some tonal advantage still with B&W film, but otherwise, digital wins.
06-01-2015, 04:00 PM   #6
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Civiletti- The question had nothing to do with digital.
06-01-2015, 11:52 PM   #7
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Oops. As Emily Litella would say, "Nevermind".
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