Patrick Murphy

Lives in United States Orlando, United States
Works as a Public relations, The Famous Company
Has a website at
Joined on Dec 20, 2001
About me:

Current: Sony A7RV, a6400, 16-35mm FE, 28-70mm FE, 24-240mm FE, 50mm 1.8; Tamron 28-200. Godox flashes:three AD100, two AD200, two V860II, TT350, XPro. Past equipment includes Sony A7III, Sony A7RII, Sony A7S, A7, A77, A55, A33, Canon 40D, 30D, 20D, 10D, Sony DSC-F717, DSC-F707, Canon S100 Digital Elph, Olympus C-800L (Feb. 1997!).


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On article Sony Alpha 7R II: Real-world ISO invariance study (358 comments in total)

The ISO 100 shot seems to have grainier noise than the ISO 6400 shot. I see this when looking at the full-size (100%) widget view in a number of areas, such as the windows and bricks at the building corner, as well as the area above the black car at left.

Is this related to the ISO invariance, or to some other factor such as the RAW processing software used or shot-to-shot variations?

Based on what DPReview presented here, it would seem that push processing on the A7Rii does have a penalty in increased or grainier noise. So this, plus the RAW conversion artifacts, IMHO would be a reason to normally photograph at the camera's indicated exposure, or perhaps just one or two stops darker if you're trying to preserve some important highlights. Am I missing something?

Link | Posted on Aug 24, 2015 at 16:12 UTC as 103rd comment | 1 reply
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