Will a 8x10 Tachihara with 150mm Schneider lense out perform a 617 Linhof with 90mm lense in regards to image sharpness?
Will a 8x10 Tachihara with 150mm Schneider lense out perform a 617 Linhof with 90mm lense in regards to image sharpness?
That is a very wide lens for an 8x10. But other factors will come into play -- mostly how well (flat) the film sits in the cameras and how large one is going with each type of negative.
My two cents' worth -- and you may have change coming!LOL!
Vaughn
I would be using Fidelity metal back double sided film holders on the Tachi and print size as large as 2500mm wide.
What will the viewer-print distance be?
As close as they can possibly view the work and still focus!
8x10. To get 2500 mm wide from an 8x10 neg needs 10x enlargement. To get 2500 mm wide from 6x17, and never mind about height, needs around 15x.Originally Posted by stefanmaxart
15x that will stand close scrutiny is more than you can reasonably hope to do.
Too many undefined variables to possibly answer your question. Both lenses will likely be diffraction limited by f22, possibly f16. What is your subject? Is it two dimensional (or approximately two dimensional)? Or, is it something with a leading foreground that will require either camera movements, or stopping down significantly to get the desired depth of field? The Tachihara has the advantage of camera movements to change the plane of focus. The Linhof does not.
The selection of film and developer will also have a potentially significant impact on final print resolution. For large factors of enlargement, the film may very well be the limiting factor in the perceived sharpness of the final print. As already pointed out, the grain will be 1.5x larger in the print from the Linhof than the print from the 8x10. That may, or may not (depending on the other factors) be the limiting factor in perceived sharpness of the final print.
The Linhof will be faster and easier to use and less susceptible to wind induced vibrations, but that won't be a factor if you’re shooting in a studio, or other controlled situation.
Personally, for making huge prints, I believe there is no substitute for big film or a large format scanning back. I find large grain in prints very distracting. Not everyone shares this bias.
Kerry
What's better, apples or oranges?
I would have said the 617 but having shot some 8x10 for a recent camera comparison test I can confirm that an 8x10 is capable of getting pixel level detail at 4000dpi - however, for what you want, the 617 will get 90% of the way there for 40% of the effort. Unless you are going to use the whole 8x10 in the future, I would recommend the 6x17. But - you will get better results out of the 8x10 if you put in the time to learn how to use it and there is quite a lot to learn if you want 4000dpi scanned files (or darkroom enlargements) out of it.
Just to show - here is a sample from an 8x10 shot scanned at 4000dpi using a Fujinon 240A at f/16 - this makes a 40,000 x 32,000 pixel, 7.4Gb file
http://static.timparkin.co.uk/static...le-4000dpi.jpg
Tim
Still Developing at http://www.timparkin.co.uk and scanning at http://cheapdrumscanning.com
Tim, just to be clear, is that a 100% crop from a 40,000 x 32,000 pixel image?
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