Having owned and used both a Pentax 67 system and a Mamiya 7 system I agree with Sal. Pentax 67 lenses don't come close to Mamiya 7 lenses in terms of resolution. My own resolution tests consistently gave between 25%-40% higher resolution with Mamiya 7 lenses than Pentax 6X7 when comparing the same film.
Sandy
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I found the Mamiya 7 65mm lens to be superior to the RZ 65mm lens with the floating elements. This was not the result of any rigorous testing, just looking at the results. Those were the only two lenses I had with a focal length overlap. However with the 150mm 7 lens I rarely get anything I want perfectly in focus. So there the longer RZ lenses gave me better results.
Tim Parkin and others have tested the Mamiya 7 lens to be some of the best lens ever, for any format. On the GetDPI, someone is challenging Tim for a "shootout" with the Sony A7R with image stacking (e.g. up to 60 images to extract the cleanest shadow details) vs. 8x10. Should be interesting.
The major flaw that I foresee in this 'comparison' is the time involved in creating that (60?) shot layered photograph... In most cases, I'd assume that the exposure time of the 8x10 shot will be long over before the digital fellow is finished with 1/2 the necessary shots for that layer cake...
There's always going to be those that want to argue
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It would interesting if the testers could assign points for different factors like price, scanner quality, user learning curve, etc. to make more useful practical comparisons. After all if you throw enough time, money, expertise at a test I am sure a multi-stacked and stitched digital could eventually trump 8x10 with a high end scan if you just kept adding frames until it won.
But I'm more interested in comparing single shots from more modest equipment and workflows.
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The film and digital images were fairly extensively post processed. Deconvolution sharpening etc.. Only fair to both platforms to get them optimally sharpened etc..
Still Developing at http://www.timparkin.co.uk and scanning at http://cheapdrumscanning.com
We bracketed the Mamiya 7 images but we were confident we would be OK as the depth of field covered most of the table at f/8 (about 20cm if I remember correctly). We put a video camera to the Mamiya 7 rangefinder and zoomed in (live view!) and the frame we used from this was spot on
Still Developing at http://www.timparkin.co.uk and scanning at http://cheapdrumscanning.com
Still Developing at http://www.timparkin.co.uk and scanning at http://cheapdrumscanning.com
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