Comments on: What in the world did my meter just do!? http://esfotoclix.com/blog1/?p=218 Technical and artistic aspects of photography Wed, 08 Sep 2010 17:48:34 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: teinby http://esfotoclix.com/blog1/?p=218&cpage=1#comment-110 teinby Mon, 10 Aug 2009 13:14:09 +0000 http://esfotoclix.com/blog1/?p=218#comment-110 thank you! I really liked this post! thank you! I really liked this post!

]]> By: machoman http://esfotoclix.com/blog1/?p=218&cpage=1#comment-109 machoman Sun, 09 Aug 2009 10:35:19 +0000 http://esfotoclix.com/blog1/?p=218#comment-109 thank you! I really liked this post! thank you! I really liked this post!

]]> By: eNoBlog http://esfotoclix.com/blog1/?p=218&cpage=1#comment-108 eNoBlog Sun, 09 Aug 2009 06:50:46 +0000 http://esfotoclix.com/blog1/?p=218#comment-108 Leon, look for next Tuesday's (August 11) blog entry. I'm still scratching my head a little, so expect it to be "rough" and rudimentary. I've been experimenting with some additional test shots which I may feature on Wednesday to show what I've learned -- which so far is, ADL helps a little, but it doesn't save you from lousy light. Leon, look for next Tuesday’s (August 11) blog entry. I’m still scratching my head a little, so expect it to be “rough” and rudimentary. I’ve been experimenting with some additional test shots which I may feature on Wednesday to show what I’ve learned — which so far is, ADL helps a little, but it doesn’t save you from lousy light.

]]> By: Boise Leon http://esfotoclix.com/blog1/?p=218&cpage=1#comment-107 Boise Leon Sat, 08 Aug 2009 22:46:22 +0000 http://esfotoclix.com/blog1/?p=218#comment-107 Jeff, The beauty of Auto ADL is that if the scene has no problems it will do nothing. It uses the exposure sensors to determine if contrast is excessive for normal JPG rendering. If it is, it will lower the exposure the appropriate amount using Matrix Metering. After the scene is captured by the sensor it analyzes the high and low values and then sets the high value contrast and low value contrast as needed to preserve the white point. It may set them higher or lower for 1 to 3 segments of the histogram curve. It tries to resolve the shadow side and the highlight parts of the picture and reduce the difference where they are next to each other. Each increment of ADL, High, Low, or Normal seems to have different rules, not just degrees of adjustment. eNo and I will be independently looking at that, soon. He works faster than I and it is very difficult to stage a still life scene to reverse engineer what is happening. My best opportunity exists in real nature and must be done with direct sunlight with a variety of clouds at a certain time of day. We have had a week of storms here in Idaho. ENo and I may be taking different routes. Right now we need a still life scene that satisfies the requirement to have measurable results over a 10 stop exposure scale. That means looking at the raw values before conversion and special raw software which will allow us to judge the headroom before the JPG conversion takes over. I keep saying we, but our efforts are completely independent. We share a common interest. Jeff,
The beauty of Auto ADL is that if the scene has no problems it will do nothing. It uses the exposure sensors to determine if contrast is excessive for normal JPG rendering. If it is, it will lower the exposure the appropriate amount using Matrix Metering. After the scene is captured by the sensor it analyzes the high and low values and then sets the high value contrast and low value contrast as needed to preserve the white point. It may set them higher or lower for 1 to 3 segments of the histogram curve. It tries to resolve the shadow side and the highlight parts of the picture and reduce the difference where they are next to each other. Each increment of ADL, High, Low, or Normal seems to have different rules, not just degrees of adjustment. eNo and I will be independently looking at that, soon. He works faster than I and it is very difficult to stage a still life scene to reverse engineer what is happening. My best opportunity exists in real nature and must be done with direct sunlight with a variety of clouds at a certain time of day. We have had a week of storms here in Idaho. ENo and I may be taking different routes. Right now we need a still life scene that satisfies the requirement to have measurable results over a 10 stop exposure scale. That means looking at the raw values before conversion and special raw software which will allow us to judge the headroom before the JPG conversion takes over. I keep saying we, but our efforts are completely independent. We share a common interest.

]]> By: johnny http://esfotoclix.com/blog1/?p=218&cpage=1#comment-97 johnny Fri, 07 Aug 2009 09:50:57 +0000 http://esfotoclix.com/blog1/?p=218#comment-97 Hello. Thank you for this great info! Keep up the good job! Hello. Thank you for this great info! Keep up the good job!

]]> By: Jeff Charles http://esfotoclix.com/blog1/?p=218&cpage=1#comment-78 Jeff Charles Wed, 05 Aug 2009 15:20:39 +0000 http://esfotoclix.com/blog1/?p=218#comment-78 It is puzzling. The fact that the D80's MM produced results that seem sort of correct for each card makes it hard to come up with a simple explanation. In any case, I'm pretty happy with my D90's MM. It does tend to give more exposure than I'd choose for scenes with a dark foreground and a bright sky, but that's correctable with EV compensation and/or PP, especially if you shoot raw. I have also experimented with ADL on Auto. It will reduce exposure to protect highlights in high-contrast scenes. Shooting raw (and not using Nikon software for PP), that's all it seems to do. It is puzzling. The fact that the D80′s MM produced results that seem sort of correct for each card makes it hard to come up with a simple explanation.

In any case, I’m pretty happy with my D90′s MM. It does tend to give more exposure than I’d choose for scenes with a dark foreground and a bright sky, but that’s correctable with EV compensation and/or PP, especially if you shoot raw. I have also experimented with ADL on Auto. It will reduce exposure to protect highlights in high-contrast scenes. Shooting raw (and not using Nikon software for PP), that’s all it seems to do.

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