« on: October 04, 2012, 11:40:47 AM »
I used mine with the 24-105 in moderate rain for a couple hours with no problems. I'm sure the rubber seal at the base of the lens makes all the difference in the world.
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I got a 5D Mark III last week and the first lens to undergo focus testing in my studio was that Sigma 50. I was relieved to see that it now focuses faster and more consistently. I think I dialed in +2 on the micro-adjust. Images were pretty sharp wide open and extremely sharp at f2.0.
5dmk2 and d800 same exposure time, f-stop base iso
5dmk2 developed in camera raw and DPP and d800 in camera raw so that details/information can be seen equally in the white house wall and in the white towel in front of the garden house =high lights reproduction.
Then we look in the shadows, low levels , an area is selected in the low levels and auto contrast is laid, auto contrast are showing levels , details, noise in the selected area , no personal influence , photoshop is calculating the signal level from the pixels values. This is the results of 2-3 extra stops DR in low levels. And how to use it- it is up to the photographer and the skills to use photoshop
I have lent the raw files to a number of talented members at dpreview , they have all checked and verified the results by them selves.
I think you just made a really good argument for leaving the camera set to sRGB. It's the smaller color space so if you don't see any clipping in the tiny, questionably precise histogram in sRGB, you damn well won't have any clipping in the image when processing the RAW file.
Nah it just means you crippled RAW even more than you had to (although if all you ever care about is final sRGB output I suppose not).
You know, this has me thinking (a dangerous pasttime, I know...). I've often made the argument that the in-camera jpg settings do matter if you shoot RAW, indirectly, because the in-camera settings are applied to the JPG preview image that's reviewed on the LCD and used to generate the histograms. So, to the extent that you make exposure decisions based on the preview image, histograms, or blinking highlight alert, those JPG settings matter.
I wonder...what is the gamut of the camera's LCD, would sRGB vs. Adobe RGB make a difference in color channel saturation, a difference in the histogram or highlight alert calls, etc.?