Brian Kimball

Brian Kimball

Lives in United States Mammoth Lakes, CA, United States
Joined on Oct 17, 2010
About me:

JMT 2013, 2014, 2021 (hopeful)
PCT 2017
Roper's SHR 2019, 2020, 2021 (hopeful)

Brian Kimball's recent activity

  • LR is the only one I know of that will output a Linear DNG.  Everything else I can think of outputs TIF or JPG. 120 images?  That's a lot.  Is there a lot of redundancy?  Can you eliminate ...
  • Nice.  Much superior to the first.  The right conditions make all the difference. How would you feel about carefully cloning out the cement access panel on the right side of the pond, as well as ...
  • [...] 10-15 years ago Trey Ratcliff and others popularized HDR processing while also adding some really crazy experimental tonemapping and calling that HDR. Everyone associated the crazy tones with ...
  • You know, about 30 years ago I was a young teenager active on USENET. I distinctly recall one particularly aggressive person who responded to most people with “Reading comprehension problems? ...
  • i have never seen him say that. Yes, if the sensor is not iso invariant.  If the sensor is truly iso invariant, it doesn’t make a difference. There is no situation, no camera (that I’ve ever seen), ...
  • Not necessarily at all. It depends on how you setup your JPG settings and your EVF settings. It’s primarily for flash photography in dim settings where the EVF might show a black screen but you ...
  • Playback histograms and blinkies are based on the JPG. Live histograms and blinkies on mirrorless cameras or in live view are based on the EVF video feed.  This presents an additional problem when ...
  • David’s post is an excellent summary of ETTR and the motivations behind it.  I’ve had my differences with David in the past but I’m very happy to say he is consistently doing an excellent job of ...
  • I've wished for that in the past, and others pointed out that an ETTR metering system won't be able to tell the difference between specular reflection highlights (that should blow out) and actual ...
  • Here's a PDR vs ISO graph for a bunch of m4/3 Panasonics and the 50r: https://www.photonstophotos.net/Charts/PDR.htm#FujiFilm%20GFX%2050R,Panasonic%20Lumix%20DC-GH5,Panasonic%20Lumix%20DC-GX9,Panas ...
  • Yeah, as I learned more I realized it's pretty handy.  Definitely saves your highlights and DR.  Now I'm left wondering why Fuji stopped and nobody else is doing it.  Dual gain?  Fine, have your ...
  • Merely that nearly every single time I saw someone knowledgable explain digital ISO in an "advanced" way, they were focusing on the implementation details of sensor electronics, not the nuances of ...
  • Good post. I think it's also worth distinguishing between "how is ISO implemented in camera electronics" vs. "what is ISO according to the standard" I can tell you that as a layman trying to ...
  • Yeah, I'm familiar with these issues.  I shot fuji X for about 5 years and am well aware of the strife over SOS vs REI.  It's one of the (many) reasons why I decided last year to set some money on ...
  • Honestly I missed it too when posting it originally. It’s a long article. Worthy of multiple reads until it sinks in. I’ve probably read through it 5 or 6 times. I could probably benefit from more ...
  • Digital ISO is a challenging subject. The latest version of the standard, ISO 12232:2019, defines three separate and different terms that can be used to describe a digital still camera's sensitivity: (1) ...
  • Darn. For anyone confused, that non shouldn't have been there. Should have read The easy approach to ISO invariance is "don't meaningfully improve noise at higher ISOs. Just make things brighter"
  • I don't mind; it seems to help.  I just wonder if whatever Aptina/Sony is doing with dual gain could eventually turn into tri-gain, quad-gain, etc., and then we're back to this weird situation ...
  • They are in a scene-referred sense.  Raw levels respond linearly to scene brightness. I don't follow.  Can you expand on this?  I'm happy to listen. Yeah but I think this is figurative, overly ...
  • Indeed.  The easy approach to non ISO invariance is "don't meaningfully improve noise at higher ISOs.  Just make things brighter"  This can be seen in modern Fuji GFX50 sensors that are "ISO ...
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