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Forum: Digital Processing, Software, and Printing
02-15-2019, 11:47 AM
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I took a look at my old version of Photoshop and it handles the 100dpi 4x3 meter file just fine (over 200MB files). It uses "bicubic" interpolation and since you're only going for about twice the dpi, that should work fine. Granted you don't get details that wern't there to begin with, but interpolation does perform well to help it look that way as long as not too much interpolation is done (as in this case).
As Wheatfield stated, you need top notch lenses, a good tripod, and solid support (no wind or shaking ground). Also, this is an excellent application for the K-1 pixel shift mode which will boost effective resolution by eliminating interpolation from the Bayer mask (for your future work).
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Forum: Digital Processing, Software, and Printing
02-15-2019, 09:39 AM
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Usually if you send your full resolution file to a print service they will up-rez it to fit the size print required (and will usually print around 300dpi). Unless your client really needs a native resolution of 100 dpi, the K-1 file will up-rez to about 42 dpi (with a left/right side crop) at the size you stated. That's not too bad and should be suitable for viewing. You may have more issues with lens resolution than with up-rezing.
You can do the up-rezing yourself in Photoshop but not sure if it will handle that large of an output file. Try a center section of one of your photos and take a look.
Best bet as suggested is to try a sample on one of more of your photos and see what the client says (don't tip them off that they lack the full 100 dpi native resolution before you get approval).
Your other alternative is to stitch several K-1 shots to get a truly 100dpi native resolution result (as you surmised). That would also help overcome lens resolution issues.
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