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Old 21st August 2019
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ISO limits for prints

This in my view is a breath of fresh air: they’ve effectively applied real-world image standards to the runaway technology led rat-race. The methodology can be criticised in various ways (and I’m sure the tech wonks will find ways to do so) but it is a decent attempt at objectivity.

https://www.imaging-resource.com/art...h-iso-showdown

I wonder what % of guys buying a Sony A7Riv this year will ever print anything, never mind larger than 10 x 8”?
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Old 21st August 2019
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Re: ISO limits for prints

I agree Mark I read that last night and thought the same. Their article about the EM1X is also an interesting read.
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Old 22nd August 2019
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Re: ISO limits for prints

That is a useful article Mark, thank you.

The ISO sensitivity of some newer cameras is quite remarkable, but aside from whether anyone will actually print images captured at ISO 51,200, the quality of available light in these conditions usually means that one is effectively restricted to B&W.

I am more interested in the ability to take good 'clean' images at (say) ISO 3,200 or 6,400 than at some of the stratospheric ISO values discussed in the article. After all, it wasn't so long ago that HP5 pushed to ISO 800 was pushing the boundaries of acceptable grain for general photography.

Having seen the results form my son's D850 I would also say that was capable of producing very good prints well beyond the ISO 6,400 claimed in the article.
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Old 22nd August 2019
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Re: ISO limits for prints

Quote:
Originally Posted by Naughty Nigel View Post
That is a useful article Mark, thank you.

The ISO sensitivity of some newer cameras is quite remarkable, but aside from whether anyone will actually print images captured at ISO 51,200, the quality of available light in these conditions usually means that one is effectively restricted to B&W.

I am more interested in the ability to take good 'clean' images at (say) ISO 3,200 or 6,400 than at some of the stratospheric ISO values discussed in the article. After all, it wasn't so long ago that HP5 pushed to ISO 800 was pushing the boundaries of acceptable grain for general photography.

Having seen the results form my son's D850 I would also say that was capable of producing very good prints well beyond the ISO 6,400 claimed in the article.
Yes, I can certainly get better results than they list there for my E-M1ii (and by extrapolation to similar bodies for my Sony A7S and Fuji X70) but by use of a raw processor and when necessary, selective sharpening and noise reduction. They do make the point that they are relying only on the in-camera jpeg engine - incidentally I wouldn't be at all surprised if Oly, Panny and Fuji's in-camera conversions are significantly better than Canon & Nikon's.

At least it is one point of comparison, and it's repeatable by different testers.

I use the A7S a lot for low-light and night-time street photography and I have got perfectly usable A4 prints in monochrome at 51200, but a touch of grit usually suits it and I wouldn't use it for other genres at that level! 25600 is actually very good, and often so in colour as long as the light is interesting and the colours in the scene are harmonious. Sony's in-body jpegs are often horrible, incidentally.

One of the A4 prints in my successful LRPS panel was taken in a metro station at 3200 on the X70 (16Mp X-trans APSC sensor), and it actually needed no special noise processing at all.
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Assorted legacy lenses, plus a Fuji X70 & a Sony A7S.
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