Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Learning
Photography Q&A
Highlight Overload and Dynamic Range.
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="voxmagna" data-source="post: 496112" data-attributes="member: 38477"><p>I tried it and it just seems to drag the exposure down automatically together with the mid and low lights, It seems to work like auto EV. It's fine to keep the high lights from blowing out completely but it's not changing the curve. Curiously when I bring these difficult images into post and apply their 'auto exposure' corrections, they leave or set the highlights on the 256 bit limit and bring up the bottom end. I expected the camera to do that in its auto modes but it doesn't. I think the exposure system is very limited to simply averaging over a small area and adding in a peak clip detector for the Highlight Weighted feature. It isn't sampling a large number of pixels in the frame and bending the tonal curve. I have no problem with what the exposure modes do in the small areas they measure, it is what happens to the overall scene.</p><p></p><p>I'm going to do some comparisons with RAW and jpeg images where there is a marginal highlight clip to see if and how much headroom I actually get with RAW compared to JPEG and whether the camera preview display for clipping represents RAW or jpeg. If I can get a grayscale test card I can also see if the scene modes are doing anything clever.</p><p></p><p>Of course in all of this, larger dynamic range on the camera is useless if output can't be printed or displayed. But newer monitors are improving and achieving wider contrast range than before.</p></blockquote><p></p>
[QUOTE="voxmagna, post: 496112, member: 38477"] I tried it and it just seems to drag the exposure down automatically together with the mid and low lights, It seems to work like auto EV. It's fine to keep the high lights from blowing out completely but it's not changing the curve. Curiously when I bring these difficult images into post and apply their 'auto exposure' corrections, they leave or set the highlights on the 256 bit limit and bring up the bottom end. I expected the camera to do that in its auto modes but it doesn't. I think the exposure system is very limited to simply averaging over a small area and adding in a peak clip detector for the Highlight Weighted feature. It isn't sampling a large number of pixels in the frame and bending the tonal curve. I have no problem with what the exposure modes do in the small areas they measure, it is what happens to the overall scene. I'm going to do some comparisons with RAW and jpeg images where there is a marginal highlight clip to see if and how much headroom I actually get with RAW compared to JPEG and whether the camera preview display for clipping represents RAW or jpeg. If I can get a grayscale test card I can also see if the scene modes are doing anything clever. Of course in all of this, larger dynamic range on the camera is useless if output can't be printed or displayed. But newer monitors are improving and achieving wider contrast range than before. [/QUOTE]
Verification
Post reply
Forums
Learning
Photography Q&A
Highlight Overload and Dynamic Range.
Top
