-= 90D owners unite! Discuss and Post Photos

Hello all.
Got my 90D the other day and am pleased with it in almost every regard.

Just a quick question.

I took a series of shots changing the ISO in whole stops with the camera set to aperture priority.
I can see that the camera has adjusted the shutter speed and then the aperture when the Sutter speed topped out.

What I can't understand is why the images get progressively brighter as the ISO increases.
It's not a show stopper, I just did not expect to see it.

fordmondeo wrote in post #19058537
Hello all.
Got my 90D the other day and am pleased with it in almost every regard.

Just a quick question.

I took a series of shots changing the ISO in whole stops with the camera set to aperture priority.
I can see that the camera has adjusted the shutter speed and then the aperture when the Sutter speed topped out.

What I can't understand is why the images get progressively brighter as the ISO increases.
It's not a show stopper, I just did not expect to see it.

Hosted photo: posted by fordmondeo in
./showthread.php?p=190​58537&i=i20492351
forum: Canon Digital Cameras

Other of the converter software varying this, two things come to mind. What metering mode did you use? If it is heavily weighted to a small area, then perhaps the downward drift of the lens during the series had something to do with it. Also, this looks like it might be outdoors. Could it be that the cloud cover was changing during the series, but not enough to jump to a different "sunny-f/x" combo?

The 90d AF problem is real.

I've just spent about a week using a rental 90d body side by side with a 5dsR and it performed exactly the same as the one I own that is now at Canon repair. We'll see what that one looks like when it comes back.

As I've noted previously, I'm using both cameras with an EF600/4LIS II and either 1.4xii or 2xiii teleconverter. Maximum aperture with those TCs is f/5.6 and f/8, respectively, and that's at, or right next to, the maximum aperture where the AF system is rated to function. YMMV, depending on focal length and aperture of your lens.

My conclusion is based on comparison to the AF system in the 5dsR which I've been using for the past 5 years or so, making some hundreds of thousands of images and doing many microfocus adjustments (MFAs).

Compared to the 5dsR AF system, the 90d behaves oddly: when doing an MFA the same way I've done it for the 5dsR, a 5ds, 5dMarkII and a 7dII, the visible area of critical sharpness is very variable (the critically sharp plane can be easily seen to vary from front to back and everywhere in between on sets of 10 frames where I make slight manual changes to focus before hitting AF, in OneShot Mode and single point selected) and it doesn't respond to major changes in MFA setting (from +20 to -20 in 5 unit increments, the location of the critical sharpness plane remains in the same, variable, range). But, when used on live subjects, birds, it doesn't seem quite so bad (maybe that's just a consequence of it being pretty close at zero MFA and the depth of field covers it; if it was as far off as the 5dsR, which needs a 15 unit correction, it would be horrible.)

Where the 5dsR was hitting perfect focus time after time over 80 to 90% of 50 to 100 frames, the 90d might get 50% almost right. And that's with the benefit of a bit extra DOF from f/11 on most shots.

I can only conclude that the 90d has an inferior AF system and isn't up to handling my lenses the way I use them. I can also only hope that it is a software issue and a firmware update is in the works.

FrankKolwicz wrote in post #19058810
The 90d AF problem is real.

I've just spent about a week using a rental 90d body side by side with a 5dsR and it performed exactly the same as the one I own that is now at Canon repair. We'll see what that one looks like when it comes back.

As I've noted previously, I'm using both cameras with an EF600/4LIS II and either 1.4xii or 2xiii teleconverter. Maximum aperture with those TCs is f/5.6 and f/8, respectively, and that's at, or right next to, the maximum aperture where the AF system is rated to function. YMMV, depending on focal length and aperture of your lens.

My conclusion is based on comparison to the AF system in the 5dsR which I've been using for the past 5 years or so, making some hundreds of thousands of images and doing many microfocus adjustments (MFAs).

Compared to the 5dsR AF system, the 90d behaves oddly: when doing an MFA the same way I've done it for the 5dsR, a 5ds, 5dMarkII and a 7dII, the visible area of critical sharpness is very variable (the critically sharp plane can be easily seen to vary from front to back and everywhere in between on sets of 10 frames where I make slight manual changes to focus before hitting AF, in OneShot Mode and single point selected) and it doesn't respond to major changes in MFA setting (from +20 to -20 in 5 unit increments, the location of the critical sharpness plane remains in the same, variable, range). But, when used on live subjects, birds, it doesn't seem quite so bad (maybe that's just a consequence of it being pretty close at zero MFA and the depth of field covers it; if it was as far off as the 5dsR, which needs a 15 unit correction, it would be horrible.)

Where the 5dsR was hitting perfect focus time after time over 80 to 90% of 50 to 100 frames, the 90d might get 50% almost right. And that's with the benefit of a bit extra DOF from f/11 on most shots.

I can only conclude that the 90d has an inferior AF system and isn't up to handling my lenses the way I use them. I can also only hope that it is a software issue and a firmware update is in the works.

Interesting and unfortunate. We need that 7D3. Good comment about firmware. I note that v 1.1.1 is out now (already half a year old).

You said. firmware 1.1.1 is now out. Is this for the 90D?

One small leap....

FrankKolwicz wrote in post #19058810
The 90d AF problem is real.

I've just spent about a week using a rental 90d body side by side with a 5dsR and it performed exactly the same as the one I own that is now at Canon repair. We'll see what that one looks like when it comes back.

As I've noted previously, I'm using both cameras with an EF600/4LIS II and either 1.4xii or 2xiii teleconverter. Maximum aperture with those TCs is f/5.6 and f/8, respectively, and that's at, or right next to, the maximum aperture where the AF system is rated to function. YMMV, depending on focal length and aperture of your lens.

My conclusion is based on comparison to the AF system in the 5dsR which I've been using for the past 5 years or so, making some hundreds of thousands of images and doing many microfocus adjustments (MFAs).

Compared to the 5dsR AF system, the 90d behaves oddly: when doing an MFA the same way I've done it for the 5dsR, a 5ds, 5dMarkII and a 7dII, the visible area of critical sharpness is very variable (the critically sharp plane can be easily seen to vary from front to back and everywhere in between on sets of 10 frames where I make slight manual changes to focus before hitting AF, in OneShot Mode and single point selected) and it doesn't respond to major changes in MFA setting (from +20 to -20 in 5 unit increments, the location of the critical sharpness plane remains in the same, variable, range). But, when used on live subjects, birds, it doesn't seem quite so bad (maybe that's just a consequence of it being pretty close at zero MFA and the depth of field covers it; if it was as far off as the 5dsR, which needs a 15 unit correction, it would be horrible.)

Where the 5dsR was hitting perfect focus time after time over 80 to 90% of 50 to 100 frames, the 90d might get 50% almost right. And that's with the benefit of a bit extra DOF from f/11 on most shots.

I can only conclude that the 90d has an inferior AF system and isn't up to handling my lenses the way I use them. I can also only hope that it is a software issue and a firmware update is in the works.

It would be interesting to see how your 90D performs with different lenses. Is it the AF system in general, or some specific interaction with your lens/TC combos? There seems to be a lot of people here who are not having these problems. Not that I am questioning your experiences, but I am wondering about whether this experience generalizes to other situations. FWIW, I have not experienced these sorts of issues, but I don't have the EF600/4L.

cdmazoff wrote in post #19058844
You said. firmware 1.1.1 is now out. Is this for the 90D?

Yes.
https://www.usa.canon.​com …subtab=download​s-firmware

FrankKolwicz wrote in post #19058810
The 90d AF problem is real.

I've just spent about a week using a rental 90d body side by side with a 5dsR and it performed exactly the same as the one I own that is now at Canon repair. We'll see what that one looks like when it comes back.

As I've noted previously, I'm using both cameras with an EF600/4LIS II and either 1.4xii or 2xiii teleconverter. Maximum aperture with those TCs is f/5.6 and f/8, respectively, and that's at, or right next to, the maximum aperture where the AF system is rated to function. YMMV, depending on focal length and aperture of your lens.

My conclusion is based on comparison to the AF system in the 5dsR which I've been using for the past 5 years or so, making some hundreds of thousands of images and doing many microfocus adjustments (MFAs).

Compared to the 5dsR AF system, the 90d behaves oddly: when doing an MFA the same way I've done it for the 5dsR, a 5ds, 5dMarkII and a 7dII, the visible area of critical sharpness is very variable (the critically sharp plane can be easily seen to vary from front to back and everywhere in between on sets of 10 frames where I make slight manual changes to focus before hitting AF, in OneShot Mode and single point selected) and it doesn't respond to major changes in MFA setting (from +20 to -20 in 5 unit increments, the location of the critical sharpness plane remains in the same, variable, range). But, when used on live subjects, birds, it doesn't seem quite so bad (maybe that's just a consequence of it being pretty close at zero MFA and the depth of field covers it; if it was as far off as the 5dsR, which needs a 15 unit correction, it would be horrible.)

Where the 5dsR was hitting perfect focus time after time over 80 to 90% of 50 to 100 frames, the 90d might get 50% almost right. And that's with the benefit of a bit extra DOF from f/11 on most shots.

I can only conclude that the 90d has an inferior AF system and isn't up to handling my lenses the way I use them. I can also only hope that it is a software issue and a firmware update is in the works.

I don't have the 90D but I keep reading this post. It definitely touches a cord in me. The line:

".... hitting perfect focus time after time over 80 to 90% of 50 to 100 frames, the 90d might get 50% almost right."

If I replace your 90D with my 7D2 then it fits my experience almost perfectly. It's the pebble in your shoe or the itch you can't reach.

Good luck with it.

Rod

I may be totally wrong on this but after following this discussion for a while I am wondering if the whole problem is you are comparing a $1200 camera to a $5000 camera and expecting the same results. I have not experienced any focusing problems with my 90D and my 400mm L lens granted it's not the 600 nor do I use an extender. Just some food for thought. I hope you solve your problem as it seems really frustrating.
Rene

ah... thanks Archie!! Don't need it.

RodS57 wrote in post #19058981
I don't have the 90D but I keep reading this post. It definitely touches a cord in me. The line:

".... hitting perfect focus time after time over 80 to 90% of 50 to 100 frames, the 90d might get 50% almost right."

If I replace your 90D with my 7D2 then it fits my experience almost perfectly. It's the pebble in your shoe or the itch you can't reach.

Good luck with it.

Rod

OMG!! Don't let the 7D ii crowd know that their camera isn't perfect. But as the other member suggested: Get a 1DX iii and quit whining.

a few recent shots...gotta say i love using this for landscapes, the dynamic range i can pull out is great...

IMAGE LINK: https://flic.kr/p/2iY6​5GH

IMAGE LINK: https://flic.kr/p/2iXH​gRv

DreDaze wrote in post #19059434
a few recent shots...gotta say i love using this for landscapes, the dynamic range i can pull out is great...

IMAGE LINK: https://flic.kr/p/2iY6​5GH p-week18_20_0129 by andre gregoire, on Flickr

IMAGE LINK: https://flic.kr/p/2iXH​gRv p-week18_20_0149 by andre gregoire, on Flickr

Wow on the landscape!!!

Finally.. These guys are so tricky to capture.. and then not be blurry or fuzzy!!!