Does anyone know what happened here
Sep 5, 2017 19:10:20 #
I took 2 almost identical shots. I had the camera on Auto ISO, Matrix metering, f/5.6 and 1/125. I didn't change anything but the first shot the camera chose ISO 5600 and the second it chose ISO 1100.
Sep 5, 2017 19:13:23 #
Sep 5, 2017 19:17:41 #
Matrix metering uses scene recognition and sometimes it seems to get on the "edge" of two decisions. One micro move one way or another and it takes a different direction and uses a different exposure. Unless you see stuff like this all the time, I'd not worry about it - just a fluke. I have it happen on rare occasion and just brush it off.
Sep 5, 2017 19:21:08 #
Sep 5, 2017 19:48:34 #
BebuLamar wrote:
I took 2 almost identical shots. I had the camera on Auto ISO, Matrix metering, f/5.6 and 1/125. I didn't change anything but the first shot the camera chose ISO 5600 and the second it chose ISO 1100.
AUTO ISO happened. Never the best choice, seldom a good choice.
Sep 5, 2017 20:08:41 #
rgrenaderphoto wrote:
Yes, Auto ISO sucks.
Auto ISO works fine! But Matrix metering does not.
The problem is as Steve Perry described, and what it does is make it sometimes impossible to get adjustments to correct exposure. For example if the darker exposure had been the first shot it would have appeared that perhaps a setting of +2 Exposure Compensation would be the fix... but instead the result could be the brighter shot with even 2 fstops more brightness!
Matrix metering is for beginners, and will do something right more often than not. If always getting exposure right is critical Matrix metering should be avoided.
Sep 5, 2017 20:12:39 #
I have that happen just when switching from one metering mode to another. Doncha hate that?
Sep 5, 2017 20:41:41 #
BebuLamar wrote:
I took 2 almost identical shots. I had the camera on Auto ISO, Matrix metering, f/5.6 and 1/125. I didn't change anything but the first shot the camera chose ISO 5600 and the second it chose ISO 1100.
Auto ISO is going to adjust as the camera moves and the matrix meter sees a slightly different scene. So would auto aperture (shutter priority) or auto shutter (aperture priority) make adjustments. The scene is too much for the meter to interpret properly. Labs call this "subject failure" to avoid insulting the photographer...
Sep 5, 2017 21:07:38 #
burkphoto wrote:
Auto ISO is going to adjust as the camera moves and the matrix meter sees a slightly different scene. So would auto aperture (shutter priority) or auto shutter (aperture priority) make adjustments. The scene is too much for the meter to interpret properly. Labs call this "subject failure" to avoid insulting the photographer...
😉
Although... Some camera matrix metering systems seem to suck a lot less than others?
Looking at the subject, near ground, back ground and natural light that seemed to be available, my humble opinion is that this "was an accident waiting to happen", unless the OP is lucky/wise/wealthy enough to have purchased a body with great ISO matrix metering capabilities... And was able to hit exactly the same mark with the meter sensors, both times.
Sep 5, 2017 21:24:31 #
BB4A wrote:
😉
Although... Some camera matrix metering systems seem to suck a lot less than others?
Looking at the subject, near ground, back ground and natural light that seemed to be available, my humble opinion is that this "was an accident waiting to happen", unless the OP is lucky/wise/wealthy enough to have purchased a body with great ISO matrix metering capabilities... And was able to hit exactly the same mark with the meter sensors, both times.
Although... Some camera matrix metering systems seem to suck a lot less than others?
Looking at the subject, near ground, back ground and natural light that seemed to be available, my humble opinion is that this "was an accident waiting to happen", unless the OP is lucky/wise/wealthy enough to have purchased a body with great ISO matrix metering capabilities... And was able to hit exactly the same mark with the meter sensors, both times.
Which camera has that capabilities? Besides this is the first time it happened to me. These are not the only 2 shots. I took a total of 6 shots of the same scene and the ISO varying between ISO 4500 to 5600 except the one it dropped to 1100.
Sep 5, 2017 21:32:00 #
rgrenaderphoto wrote:
Yes, Auto ISO sucks.
No, auto ISO does NOT suck, but like every other mode on your camera, YOU have to know how and when to use it.
I'd go with what Steve said.
A camera is just a machine that measures light and measures contrast them makes some decisions.
One of your shots is framed to the right, the other to the left! I'd say in one case it read the tree and in the other, not.
Unless you don't have time, always glance at your light meter to see that the exposure is consistent! Good luck
SS
Sep 5, 2017 21:33:02 #
RWR
Loc: La Mesa, CA
BebuLamar wrote:
I took 2 almost identical shots. I had the camera on Auto ISO, Matrix metering, f/5.6 and 1/125. I didn't change anything but the first shot the camera chose ISO 5600 and the second it chose ISO 1100.
Looks like the camera fell over!
Sep 5, 2017 22:44:12 #
Hmmm....I dont see enough lighting difference in the framing to cause any Auto mode other than spot metering that would drive that big a variation. Unless the metering overweighted the exposure to the subject (the girl who is the darkest item in the frame ) in the 1st pic and samples just to her left which is the brightest item in the frame on the 2nd.
I could explain this in spot metering but not matrix.
The auto ISO on this camera may not be as good as others... I absolve the photographer of any wrongdoing :-)
...I rarely use AutoISO but usually put my camera in spot metering and tweak the settings live to get good exposure from the metering slider in the viewfinder while in manual mode....it takes practice but worth it in the long run...
I could explain this in spot metering but not matrix.
The auto ISO on this camera may not be as good as others... I absolve the photographer of any wrongdoing :-)
...I rarely use AutoISO but usually put my camera in spot metering and tweak the settings live to get good exposure from the metering slider in the viewfinder while in manual mode....it takes practice but worth it in the long run...
Sep 5, 2017 23:08:28 #
I use auto ISO almost all the time and it works fine as long as I do my part and give it a look at the right part of the subject. It also helps if I make sure I have the SS and f-stop set right.
Sep 5, 2017 23:11:30 #
SharpShooter wrote:
No, auto ISO does NOT suck, but like every other mode on your camera, YOU have to know how and when to use it.
I'd go with what Steve said.
A camera is just a machine that measures light and measures contrast them makes some decisions.
One of your shots is framed to the right, the other to the left! I'd say in one case it read the tree and in the other, not.
Unless you don't have time, always glance at your light meter to see that the exposure is consistent! Good luck
SS
I'd go with what Steve said.
A camera is just a machine that measures light and measures contrast them makes some decisions.
One of your shots is framed to the right, the other to the left! I'd say in one case it read the tree and in the other, not.
Unless you don't have time, always glance at your light meter to see that the exposure is consistent! Good luck
SS
Agreed!!! the camera took a different light reading.
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