M4/3 Noise

Discussion in 'Four Thirds Forum' started by Frank, Feb 11, 2016.

  1. Frank

    Frank SC Rookie

    10
    Mar 12, 2013
    I love my Panasonic GX7 (touchscreen, silent, flip screen & vf, menus etc) but am stumped by m4/3 noise (& puny image stabilisation). Is noise better on any other m4/3 camera? Other wise I have to sell up kit (20mm, 43mm & oly 75mm) & return to a larger sensor boo hoo.
    I thought I should clear up a few things after receiving a pm - Most people would not find the noise very objectionable. I want to almost double the pixel dimension (ACR up-sizing) to enable good 15x20 @ 360ppi prints. So even tiny under exposure or lifting of shadows results in noise. Which can of course be treated with the Noise reduction slider but at a softening / mushy price. I come from a full frame background so am after the smoothest most noiseless possible results
    I shoot mostly 400 iso and sometimes 200 or 800. Never more than 1600.
     
    Last edited: Feb 11, 2016
  2. Ray Sachs

    Ray Sachs SC Legend

    Sep 21, 2010
    Not too far from Philly
    you should be able to figure it out...
    The GX8 and Pen-F should be marginally better, with the newer 20mp sensor. But otherwise, the sensor in the GX7 was pretty much state of the art in the m43 world for a few years. I don't know how much different the new sensor will be. I never had any issues with the noise in the 16mp sensors (the earlier 12mp were another issue - don't even THINK about trying to brighten a shadow from that sensor), but it's a relatively common complaint...

    -Ray
     
  3. Archiver

    Archiver SC Top Veteran

    619
    Jul 11, 2010
    Melbourne, Australia
    The Olympus E-M5, which shares the sensor of the GX7, has a strangely 'dirty' look in the shadows which comes from a pointillist dotting of noise. While not directly visible on first glance, it does have an almost subliminal effect which makes one think that the image is gritty and charcoalish, in a sense. This noise is far more visible when the shadows are pushed.

    I have not seen this kind of shadow/black noise in the Panasonic GM1, which has a different sensor from the E-M5 and GX7. I do use a tiny touch of luminance noise reduction in Lightroom with the GM1, but it is considerably better than the E-M5.
     
    • Agree Agree x 1
  4. Ghosthunter

    Ghosthunter boo!

    Sep 8, 2010
    London UK
    Andy
    I was talking to a Panasonic employee a few weeks ago at a show I did with them in London and he said that the key is to nail the exposure. Get that exposure correct and use a histogram if possible and you should have better files.

    Quote: I have not seen this kind of shadow/black noise in the Panasonic GM1, which has a different sensor from the E-M5 and GX7.

    The GX7 and GM1 share the same sensor and processor.
     
  5. Archiver

    Archiver SC Top Veteran

    619
    Jul 11, 2010
    Melbourne, Australia
    Ahhh, I had mixed something up. The E-M5 and the GH3 have the same sensor, which is kind of odd, given that the GH3 doesn't seem to suffer the same noise issues as the E-M5.
     
  6. Ghosthunter

    Ghosthunter boo!

    Sep 8, 2010
    London UK
    Andy
    I think it's all in the processing. You can't have everything so one company will choose one set of algorithms and the other a different set of algorithms to process the images.