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View Full Version : ISO6400 is pretty usable


brian1208
21st November 2013, 04:13 PM
Its a bit of a cold and grey day out there so I was clearing out some "deadwood" from my files and found a series of test shots with the replacement EM-1 + 9-18 at ISO6400. With minimal processing in LR5.3 RC the images are pretty good and would certainly make a useable A4 print

http://farm3.staticflickr.com/2845/10980088744_61ffb8876b_o.jpg


here's a crop from the central portion showing light and shaded areas with no noise reduction in PP

http://farm8.staticflickr.com/7301/10980212894_20b1259914_o.jpg

Ian
21st November 2013, 04:16 PM
Sorry to bang on about this but even f/8 will see some loss in sharpness because of diffraction. f/6.3 is now my preferred lower limit and that would mean a lower ISO for the same shutter speed of course :)

Ian

byegad
21st November 2013, 04:22 PM
My experience with the EPL-5 suggests you are right.

Iansky
21st November 2013, 04:23 PM
Nice and certainly shows what the new sensor coupled with good glass can deliver!

brian1208
21st November 2013, 04:23 PM
bang away all you want Ian, I'm here to learn :)

Despite that, I still think the noise level is pretty good for ISO6400 (which was what I was playing with here)

brian1208
21st November 2013, 04:32 PM
Just for you Ian, another from the sequence, shot with ISO 400 and f5.6 :)

(as I said, I was testing the replacement body under a range of conditions to see how it was performing)

http://farm8.staticflickr.com/7452/10980290656_368a0e63ec_o.jpg

David Morison
21st November 2013, 06:27 PM
But the E-M5 handled this ISO well too:

http://e-group.uk.net/gallery/data/500/PA271832.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/53831)

With Leica 14-150mm

David

brian1208
21st November 2013, 06:58 PM
that looks a nice clean shot David, I must admit that for me ISO3200 is as High as I want to go with my EM-5, and even then I would restrict the print size to 15"x10"

Two good little cameras :)

benvendetta
21st November 2013, 11:06 PM
Sorry to bang on about this but even f/8 will see some loss in sharpness because of diffraction. f/6.3 is now my preferred lower limit and that would mean a lower ISO for the same shutter speed of course :)

Ian

I wouldn't have thought that diffraction kicked in by f8 - if it does then that is a bit worrying and not very good if you are trying to maximise depth of field in say landscapes.
Time for some tests I think.

Zuiko
22nd November 2013, 12:26 AM
I wouldn't have thought that diffraction kicked in by f8 - if it does then that is a bit worrying and not very good if you are trying to maximise depth of field in say landscapes.
Time for some tests I think.

Ian has previously comprehensively tested this and diffraction does indeed feature at f8, although it doesn't exactly "kick in," it's more a case of "subtley appears." Of course, just because a little diffraction occurs doesn't mean that f8 or even f11 shouldn't be used if that amount of DOF is needed.

Ralph Harwood
22nd November 2013, 01:42 AM
Hi there Everyone!

Does anyone know if Ian did a comparative test for the onset of diffraction with olympus's smaller sensor cameras (the XZ-1, 2 or the stylus)? From my A'level physics (quite a few years ago) the amount a beam is deflected is due to the size of the hole and the wave-length of the light - with the smaller sensors having a smaller pitch between the photosites will this cause diffraction earlier or will the smaller distance from the back of the lens to the sensor negate this?

As an aside - use IR - the longer wavelengths definately diffract less!

Cheers,

Ralph.

magicaxeman
23rd November 2013, 12:42 AM
I have to disagree, for web use or a small print you can get away with it but for larger prints such as A4 my ceiling would be 3200, larger than that I would stick to ISO 1600 max.

I turned the on board noise reduction off as I found it started to smear the details and could give a "painterly" effect, taking care of it in PP via ACR I felt was the better solution.

Yes for M43 its a huge leap forward in high ISO iQ, I'm not knocking that but compared with APS-C its still noisier than some though having said that its a testament to Oly that the EM1 can out perform some APS-C camera's on high ISO performance & noise.

David Morison
23rd November 2013, 06:43 AM
My E-M1 certainly outperforms my Canon 7D in terms of noise and IQ, although the latter's noise seems slightly easier to deal with in pp.

David

Daveart
23rd November 2013, 11:54 AM
Hi I was watching a youtube LR5 seminar the other day and they showed a full frame canon image shot at 6400 iso with noise filters set to off and it was and looked noiser than the OMD EM5 images at the same iso. So don't be to quick to knock Olympus, anyway their is to much of noise issuse in digital photography Have you every seen 3200 iso in film it would make digital look clean.

Dave