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Not sure I'd agree with that, for us wedding photographers we are printing high iso images on large album spreads all the time. Last album I did had a ring shot from the ceremony, shot at iso 3200, printed across a double spread, 28" wide in total (was a 10X14" album, not the largest album size by far). Viewed far closer than a similar sized print would be on a wall. This is standard never mind the wall prints, etc.
In any case, now that I have a 5D3 and shooting it alongside my 5Dc, processing in ACR, 1.5 stop...Show more →
Ah....finally someone who grasps the concept of large prints viewed from close distance. This type of final product is indeed the most demanding of all when it comes to high ISO capabilities. Often larger than a wall print, but viewed much closer, here we need the best high ISO performance available. And this is also how I usually judge the high ISO capabilities of a camera:
- I give the test images its treatment in Lightroom and - if necessary - dedicated noise removal software
- I export it to 2560 pixels wide (this is the pixels size of my 30" computer screen)
- I watch this image on that screen using "full screen" mode
The screen is about the size of a 12"-14" wedding album. I adjust my viewing distance accordingly and just see if I like what I see. With my 5Dc @3200 ISO there will be some very mild noise, but not too much provided I used good exposure and good PP technique. If the noise shows too much in flat surfaces like sky or walls, I use Photoshop to iron it out.