Shooting side-by side, same subject and same exact 85mm lens@ f/1.8 using Aperture Priority / Auto ISO:
My Sony A1 chooses 1/90 sec / f/1.8 / ISO 800
My R5II chooses 1/125 sec / f/1.8 / ISO 2000
I want to get the Canon to choose lower ISOs, as it should here.
I noticed the same thing happening with a different R5II body about six months ago, shooting night scenes where the Canon would always unnecessarily fast shutter speed and choose ISO thousands higher than the Sony.
I know about changing the Minimum Shutter Speed Auto setting to a slower setting, but that just ends up with a too slow shutter, resulting in blur.
(just put that Shutter Speed Auto setting down to minus one, and now I'm getting 1/50 of a second with an 85mm lens. Obviously too slow.)
Thx Mike
I'd like to get Aperture Priority to work the way it should, if possible.
Past Canon cameras (I have had most of them since the EOS 1D, and 5D days) worked properly in this area.
So the shutter is too fast, but if you let it go slower, it's too slow? My R6 has min shutter speed choices of 1/125 and 1/60. That's one stop. If you want more control over the shutter than that, you'll need to actually take control of it with Tv or M.
I use M+auto ISO 95% of the time because I want to choose those parameters for the situation without having to constantly change the min shutter speed. I might shoot something that needs 1/500, then a minute later shoot something that I can get away with 1/25.
Every other camera I have used, regardless of brand, picks 1/focal length as minimum shutter speed for Aperture Priority (to help avoid camera shake blur...).
But not this one.
R5II chooses 1/focal length x2 or x3 - then cranks up the ISO.
ronno wrote:
Every other camera I have used, regardless of brand, picks 1/focal length as minimum shutter speed for Aperture Priority (to help avoid camera shake blur...).
But not this one.
R5II chooses 1/focal length x2 or x3 - then cracks up the ISO.
No. That would be in a Program mode. In Av the shutter speed depends on the ISO you set. If you want to set some kind of safety shift that's different, but not the basic Av (or A in some systems).
ronno wrote:
Every other camera I have used, regardless of brand, picks 1/focal length as minimum shutter speed for Aperture Priority (to help avoid camera shake blur...).
But not this one.
R5II chooses 1/focal length x2 or x3 - then cracks up the ISO.
Right - that was just one example. Sometimes it choses shutter speeds way higher than is reasonable for no apparent reason.
Also ISO it chose in the above example is ISO 2000 instead of the Sony's 800.
Yes, same metering modes.
I know I can set the R5II to negative exposure compensation to somewhat remedy this - but the Canon sensor is already more noisy, so potentially having to up the exposure in post is not ideal.
Regardless, with the Sony there is a setting named ISO AUTO Min SS - which allows you to change if you want the minimum shutter speed for a given lens (focal length) to be slower or faster when in Auto ISO.
SLOWER SLOW STD FAST FASTER are the options.
Is there such a thing on the R5II? That's what I am looking for.
And I could have sworn there was something similar on my old R5.
I'm not familiar with that kind of complex AE mode. I'm fully manual or using Auto ISO (fixed aperture+shutter) with exposure compensation. Changing the ISO is least disruptive to the image.
Check the instruction manual and maybe see if Flexible Program or some other options will help. Best of luck.
ronno wrote:
Right - that was just one example. Sometimes it choses shutter speeds way higher than is reasonable for no apparent reason.
Also ISO it chose in the above example is ISO 2000 instead of the Sony's 800.
Yes, same metering modes.
I know I can set the R5II to negative exposure compensation to somewhat remedy this - but the Canon sensor is already more noisy, so potentially having to up the exposure in post is not ideal.
You don't seem to be following the logic.
Right - that was just one example. It was the example provided so expect it to be referred to. Also ISO it chose in the above example is ISO 2000 instead of the Sony's 800. OK, you are now referring to it.
Yes, we see the ISO Values. We also see the Shutter speeds.
Sony 1/90 and ISO800. Canon 1/125 and ISO2000.
So, let's say the Canon min shutter speed was reduced and therefore also 1/90. Then ISO would have been ISO1200.
Now, it's not ISO 800 vs ISO 2000, it's ISO 800 vs ISO1200, a much smaller difference.
Did you take the photos? How were they exposed?
I know about changing the Minimum Shutter Speed Auto setting to a slower setting, but that just ends up with a too slow shutter, resulting in blur. Well, if you chose 1/90, it would match the Sony.
Choderboy wrote:
You don't seem to be following the logic.
Right - that was just one example. It was the example provided so expect it to be referred to. Also ISO it chose in the above example is ISO 2000 instead of the Sony's 800. OK, you are now referring to it.
Yes, we see the ISO Values. We also see the Shutter speeds.
Sony 1/90 and ISO800. Canon 1/125 and ISO2000.
So, let's say the Canon min shutter speed was reduced and therefore also 1/90. Then ISO would have been ISO1200.
Now, it's not ISO 800 vs ISO 2000, it's ISO 800 vs ISO1200, a much smaller difference.
Did you take the photos? How were they exposed?
I know about changing the Minimum Shutter Speed Auto setting to a slower setting, but that just ends up with a too slow shutter, resulting in blur. Well, if you chose 1/90, it would match the Sony....Show more →
I am not choosing the shutter speed, I am in Ap Prio - so I am choosing the aperture.
I’ll try to make it simple:
With a 50mm on the Canon , I point it at subject at 1.8, and instead of the camera choosing 1/50 sec and the appropriate ISO, it might chose 1/200 and thus higher ISO which is noisier and less DR.
If I adjust Minimum Shutter Speed one notch down, it might choose 1/30. (Too slow)
In the above scenario the Sony would always choose 1/50 with a 50mm lens (as long as light levels allow), because focal length is 50mm. There’s no reason to go to a 1/200 and then jack up ISO with a 50mm attached.
All my prior Canons did this correctly but both of the R5II cameras I have purchased do not.
Thank you - yes that is the setting I am referring to, but it doesn’t resolve the issue.
Camera still inexplicably chooses a much higher shutter speed than necessary, and the adjustment (down one notch) just ends up going too far in the opposite direction.
ronno wrote:
Shooting side-by side, same subject and same exact 85mm lens@ f/1.8 using Aperture Priority / Auto ISO:
My Sony A1 chooses 1/90 sec / f/1.8 / ISO 800
My R5II chooses 1/125 sec / f/1.8 / ISO 2000
I want to get the Canon to choose lower ISOs, as it should here.
I noticed the same thing happening with a different R5II body about six months ago, shooting night scenes where the Canon would always unnecessarily fast shutter speed and choose ISO thousands higher than the Sony.
I know about changing the Minimum Shutter Speed Auto setting to a slower setting, but that just ends up with a too slow shutter, resulting in blur.
(just put that Shutter Speed Auto setting down to minus one, and now I'm getting 1/50 of a second with an 85mm lens. Obviously too slow.)
1/125 sounds a bit less than I might like , actually, although I'm sure if it's a static subject using stabilization you could go much lower. Only 1/2 stop different from 1/125 to 1/90, not a really big deal imo
I've never really been willing to let camera pick iso. Haven't used the R5 II but usually its not too hard to change the iso in Av, did it in the dark last night , you just get used to it.
AmbientMike wrote:
1/125 sounds a bit less than I might like , actually, although I'm sure if it's a static subject using stabilization you could go much lower. Only 1/2 stop different from 1/125 to 1/90, not a really big deal imo
I've never really been willing to let camera pick iso. Haven't used the R5 II but usually its not too hard to change the iso in Av, did it in the dark last night , you just get used to it.
Generally, when I'm shooting fast in changing light etc I'm fine with the camera choosing ISO as they are relatively low noise sensors, but WHY is it choosing 1/200 (and upping the ISO) instead of 1/focal length as Canons have in the past? And as most (all?) other cameras do?
Anyway, I'll deal with it. Just thought there may be a setting that I was overlooking, but apparently not.
ronno wrote:
Generally, when I'm shooting fast in changing light etc I'm fine with the camera choosing ISO as they are relatively low noise sensors, but WHY is it choosing 1/200 (and upping the ISO) instead of 1/focal length as Canons have in the past? And as most (all?) other cameras do?
Anyway, I'll deal with it. Just thought there may be a setting that I was overlooking, but apparently not.
I've mostly used x0D and rebels, if they have it I missed it, but is there -1/3, -2/3 etc like on EV? You mentioned a -1 setting.
Id rather have 800 of course, but iso 2000 doesn't sound too high on ff, really, unless you have a lot of event photos and NR on taking too long or something
