ISO 800+ -- high noise

Started 2 months ago | Discussions thread
Jacques Cornell
Jacques Cornell Forum Pro • Posts: 11,758
Re: Please

Mark Scott Abeln wrote:

GivenToFly wrote:

Thanks very much! See below examples from outside (morning sunrise on a volcano) and indoors. Would love to hear your thoughts.

Yes they are noisy, but only if you look at them closely. They are fine for social media use and smaller prints or for screen viewing.

However, there is no need to use ISO 800 in either of these.

8.8mm, f 2.0, 1/200 second, ISO 800

1/200th second is not needed for this shot. If you have a steady hand, you could even use 1/30th second at ISO 100. You might even use a slower shutter speed if the camera has anti-shake.

8.8mm, f 8.0, 1/30 second, ISO 800

F/8 is not needed on such a small sensor in order to capture adequate depth of field. Also, you risk diffraction softening at such a tight aperture (for this sensor size). I would instead use something like f/4; that is a two stop improvement, and so you could have used ISO 200.

Excellent observations. I'll add three more. First, I wouldn't consider that level of noise problematic in, say, a 12"x18" print. Second, good noise reduction would pretty much eliminate it without negatively impacting detail. Third, the interior image is soft. Might be a mediocre lens, but it might also be the diffraction softening you mentioned.

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