EOS R ISO Setting Question
Jul 6, 2019 09:45:08 #
I have a new EOS-R with the latest firmware (1.2.0) coupled with a 24-70mm F4 L Lens. For the life of me I cannot get the ISO speed to lower than 200 and wonder if anyone knows what I am doing wrong.
Looking at the manual, I have set the ISO speed settings (on the main menu) to 50-40000 (page 89) but it still will not go lower than 200 when I am adjusting the settings.
Any ideas?
Looking at the manual, I have set the ISO speed settings (on the main menu) to 50-40000 (page 89) but it still will not go lower than 200 when I am adjusting the settings.
Any ideas?
Jul 6, 2019 09:48:37 #
You have auto lighting optimizer set or one of the other exposure controls. Turn those off in the menu. The manual tells you which ones prevent the native iso. It protects the highlights by using ISO to underexpose then applies a curve to bring up shadows.
Jul 6, 2019 13:24:06 #
By default you can't set ISO below 100 (you can but you have to change some settings) but you should be able to get 100 and not limited to 200 like you said.
Jul 6, 2019 14:13:49 #
turn off highlight tone priority, page 109: The available ISO range starts at 200 when it is turned on.
Jul 7, 2019 06:10:09 #
bleirer wrote:
turn off highlight tone priority, page 109: The available ISO range starts at 200 when it is turned on.
Yes, this will not allow you to go below 200. Works the same on my 1Dx2...
Jul 7, 2019 09:00:24 #
bleirer wrote:
turn off highlight tone priority, page 109: The available ISO range starts at 200 when it is turned on.
That was it, thank you very much, I did not see the note in the book. I was playing with the settings and left this one on.
Thanks a bunch, there is so much to learn everyday!
Jul 7, 2019 09:18:10 #
Pumble wrote:
That was it, thank you very much, I did not see the note in the book. I was playing with the settings and left this one on.
Thanks a bunch, there is so much to learn everyday!
Thanks a bunch, there is so much to learn everyday!
I keep that and the auto lighting optimizer turned off. I'd rather expose to the right and roll my own in post, and it is trying to push to the left to protect the highlights.
Jul 7, 2019 12:34:47 #
Frankly today I had to google to find out what the Highlight Tone Priority did and even Canon's own video suggested quietly that it lowered the exposure about 1/2 stop. I can now understand why they limit the ISO to 200, they need some gain out of the sensor to lower (if I'm properly thinking how the setting works). Some suggest it only affects the JPEGs but I don't believe that to be true.
Jul 7, 2019 13:21:09 #
Pumble wrote:
Frankly today I had to google to find out what the Highlight Tone Priority did and even Canon's own video suggested quietly that it lowered the exposure about 1/2 stop. I can now understand why they limit the ISO to 200, they need some gain out of the sensor to lower (if I'm properly thinking how the setting works). Some suggest it only affects the JPEGs but I don't believe that to be true.
The exposure hit I believe affects raw also, if you meter the same scene with it on and then off the histogram should look different. In a sense it is changing what % reflectance the meter treats as middle grey. If you use the histogram to expose you can compensate. The curve they apply to the image in camera would only be on jpegs. in DPP it would likely be stored as a setting but could be altered without being baked in, in Lightroom you pick your own curve.
Jul 8, 2019 00:35:05 #
Thank you for the tip. I proceeded right to the menu and turned off optimizer. I am so glad that I have the ISO settings that I like.
Jul 8, 2019 01:07:47 #
thephotoman wrote:
Thank you for the tip. I proceeded right to the menu and turned off optimizer. I am so glad that I have the ISO settings that I like.
Anytime.
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