New answers tagged prints
Just a thought: If you want to see what a given image will contain in the way of detail at 3840x2160, resize the image to fit that bounding rectangle, then display it at 1:1 on your screen, making sure that an in-focus area of interest is within the "crop" of the screen. You can then see exactly what actual detail will exist at that pixel dimension, and you ...
Yes, the standard viewing situation which the DOF calculation applies to, is an 8x10 inch print, viewed at 10 inches. Circle of Confusion (CoC, see Wikipedia) is an arbitrary factor in that calculation (about how well the eye sees the magnified blurriness in the enlargement). If you print it 3 or 4 times that 8x10 size, then the allowable Circle of ...
You are correct that the standard viewing criteria used by most DoF calculators can be inaccurate when considering large prints or high resolution displays. Your best bet is to bracket your focus/aperture or check your image at the maximum possible enlargement using the rear LCD of your camera.
For signed/numbered prints, I've used a white "gel pen" that showed up against the not-light content. I think a rubber stamp is pointless. People are paying for (or appreciating in a gift) hand touches: you approve that individual print and hand sign it.
On the print itself you'll want the print number ( #/edition number if you ever decide to do limited runs), your signature, title of work, date printed. The sticker idea is a good one for your metal prints or etch the details in to ensure permanent placement <- I'd recommend the latter. You really don't need anything extra unless your client requests a ...
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