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High ISO quality ?


maxofrome

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Dear user, yesterday I was at a wedding and I had the chance to use this lovely camera for some shot. I set the ISO to 800 and manage the aperture of my 90mm to obtain enough light for the shot. Indeed I am not really happy of what I see at just 800 ISO.

 

Probably my mistake is setting the camera, but looking at the file I had the same concern as at the time with the M9. Have you example of better behaviour of the M at 800 ISO and higher?

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Thanks all for the feedback. Yes let me share the complete picture. The image at this scale show no or minimum noise, that is obviously more visible on the blue jacket and in the background. 

 

 

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Guest JonathanP

Was the original underexposed and have you lifted the shadows? There's a little tell-tale green tint in the noise on the jacket. If you shot raw and use Lightroom you could try running it through my plugin (http://blog.perkins.org.uk), it might help to remove that green cast.

 

Jonathan

 

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Was the original underexposed and have you lifted the shadows? There's a little tell-tale green tint in the noise on the jacket. If you shot raw and use Lightroom you could try running it through my plugin (http://blog.perkins.org.uk), it might help to remove that green cast.

 

Jonathan

Thanks Jonathan , I will use your tips!

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ISO 800...

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I have a few secrets to pass on.   

 

M cameras have a ton of color noise,  i.e. different colored speckles.  Fix these first against procedure.  Then do the Luminescence noise which appears as grain.  

 

Magnify to 100% exactly.   Hold option or ALT key and the image goes to monochrome.  It is easier to see what you are doing.

 

Noise appears in shadows more than highlights so why destroy the highlights?  Solution is a LUMINOSITY MASK TO CONFINE noise reduction to shadow areas.  

 

You can preserve edges for the softening effects of NR by using an edge mask which looks like a pen and ink drawing.

 

Run your photo through ACR with no sharpening or NR,  open in PS as smart object, dup layer,   move it back to ACR and do the NR and basic sharpening.  Add edge mask and luminosity mask the the dup layer 

 

This is why I use PS instead of LR.  All this works really really well.

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Never got noise problems at 800 iso so far. Just shot this snap at 800 iso with 0.7 EV underexposure (C1 v8, default noise correction). There is of course a bit of noise in some darker parts of the pic but nothing to worry about IMHO. M240 is not a noisy camera below 3200 iso but there are only two stops between 800 and 3200 iso so larger underexposures can be more problematic than with cleaner cameras. 


M2409172_c1si.jpg (12MB file)

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You must always expose to the right when using high iso on any camera.

 

Failure to do that just brings noise out of the woodwork.

 

Let's see the histogram and I bet it is underexposed.

Thanks a lot for the input. I will try again soon. 

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