-= 90D owners unite! Discuss and Post Photos

scdocrick wrote in post #19038246
Has anyone worked out a 90d raw route for linux?
I use Darktable with my 77d RAW files and am very happy with the results, but the 90d is a massive improvement with crop options.
Mouse hovering over the buy button on the 90d but I have to be able to work in linux with it.
Anyone using darktable with 90d?

Just incase anyone searches the forum and finds my post above...............
The answer is as follows
Use Canon DNG to convert the CR3 to DNG format - in Windows unfortunately,. Then save the files where you can get to them in Linux - Darktable will work fine with DNG. Results are great accross 7 lenses tested.

Thumb Twiddling: Decided to tweak this. Beautiful spots... eh?

The sad tale of the 90d AF problem persists. Equipment: EF600/4LISII; 2xiii teleconverter.

I thought I had this licked, but it keeps coming back to haunt me: the slight backfocus killed a day's work. A sequence of 136 frames of the same two birds were all soft where they should have been critically sharp and I could easily see that the plane of best focus was on their feet, not their heads, several inches behind the point the focus mark was aimed at. All the other frames from the day were also toast, but the backfocus error wasn't as obvious as those 136, as the othr subjects were less cooperative.

The 90d has been retired from my working gear and the 5ds and 5dsR are back in harness, doing what they always have with no issues (ignoring the lack of an articulated LCD and the extra magnification effect of the crop sensor and subsequently smaller RAW files the 90d was purchased for.)

I'll have a rental 90d to test later this week and keep you posted.

Killdeer Chick

FrankKolwicz wrote in post #19053978
The sad tale of the 90d AF problem persists. Equipment: EF600/4LISII; 2xiii teleconverter.

I thought I had this licked, but it keeps coming back to haunt me: the slight backfocus killed a day's work. A sequence of 136 frames of the same two birds were all soft where they should have been critically sharp and I could easily see that the plane of best focus was on their feet, not their heads, several inches behind the point the focus mark was aimed at. All the other frames from the day were also toast, but the backfocus error wasn't as obvious as those 136, as the othr subjects were less cooperative.

The 90d has been retired from my working gear and the 5ds and 5dsR are back in harness, doing what they always have with no issues (ignoring the lack of an articulated LCD and the extra magnification effect of the crop sensor and subsequently smaller RAW files the 90d was purchased for.)

I'll have a rental 90d to test later this week and keep you posted.

Thanks for the report and the info. Sorry to hear this, but it is good to know how the 90D performs under these conditions.

I have a rental 90d and used it a bit yesterday. So far, everything looks normal, so the problem is probably with the body as reported previously. I'll do more work with it later today and for the rest of the week. I hope it proves out and I can get a repair done by the factory.

One thing I did notice with the rental body is that doing a microfocus adjustment with the 600/2x combo was not as easy as it has been with my previous EOS bodies. Using my standard test of the last 7 years, the MFA was much more erratic, more than half of the repeated test frames did not have critical focus in the same plane and making one or two unit changes in the MFA were impossible to distinguish, although +/- 5 unit changes could be seen easily. Fortunately, on normal subjects, birds, the zero setting worked fine, with only about 20-30% of images slightly backfocussed. There may also have been an improvement in speed of AF subject acquisition compared to the defective body.

Just in case anyone has an old Sigma 300mm APO F4, These stopped working on new Canons unless they wre chipped (which was possible, but not now). Canon seems to have forgotten to mess with the old Sigma lenses and on the 90d it now works again perfectly!!! Quite possibly a bargain to be had - I will post some shots with this combination asap

scdocrick wrote in post #19055920
Just in case anyone has an old Sigma 300mm APO F4, These stopped working on new Canons unless they wre chipped (which was possible, but not now). Canon seems to have forgotten to mess with the old Sigma lenses and on the 90d it now works again perfectly!!! Quite possibly a bargain to be had - I will post some shots with this combination asap

can you stop it down though? they would always work wide open

ct1co2 wrote in post #18930910
UPS came through Friday delivering the 90D, is it was off to the Pikes Peak Regional Airshow with both the 90D and 7D2. I walked the hot ramp with the 90D and 15-85 while the 7D2 and 100-400 remained in the photo pit. The lesser weight of the 90D was very noticeable with the 15-85. The flip touch screen came in handy. Once the show was underway, I shot both bodies with both the 15-85 and 100-400. It felt good in the hand regardless of which lens. I noticed a couple of times the AF acquisition was a bit slower than the 7D2, but once it grabbed focus, it kept it. I was definitely getting what seemed like 10FPS just judging from the response and sound. The shutter sound is not as robust, reminding of the 6D2, except faster. I shot exclusively CRAW. Battery performance was great. I shot over 750 images, some with live view, and the battery is more than 1/2 charged. I shot 1k images with the 7D2, and had to change out a battery in the afternoon.

The electronic level in the viewfinder is far less robust than the 7D2 (or 6D2 for that matter). I may just turn it off as it's very simplistic. All day I felt like the viewfinder was sparse or missing something. It took me until the evening to figure out that drive mode, metering, and camera mode (AV, M, TV, etc) are not displayed in the viewfinder. Perhaps I am missing how to enable those.

The spread of the AF points was fine for me, as I tend to remain in the center portion for most of my shooting. I did use the outer points and it snapped to focus when I did.

As I go through the images, most of the throw aways are due to my error(s) with technique while slow speed panning. When I asked the camera to pan at higher speeds, such as during the F-22 demo, it did just fine.

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Your panning technique is impressive.

Waiting for your findings, as I'd be interested in coupling a (not having yet) 90d with an old Sigma 400/5,6 APO HSM.

taxon wrote in post #19057391
Waiting for your findings, as I'd be interested in coupling a (not having yet) 90d with an old Sigma 400/5,6 APO HSM.

i don't see any reason why all of a sudden newer canons would be able to stop down those ancient sigma lenses...yeah they could still work, wide open, with AF...but you're not going to be able to stop down the lens without erroring out

I agree, this is the way my 400 APO is working on xxD and I am supposing the same for 90d.
But I wait to see what scdocrick will find about his 300, who knows ...

Starling, taken today. Shot with the 1.4X on the 100-400mm, and a heavy crop (from 6960 to ~1888 px horiz). I thought for sure this one would be discarded. But it doesn't look too bad. If my calculations are correct, it's 560mm actual focal length, 896mm 35mm equiv, and 3300mm 35mm equiv after taking the crop into consideration.

The 90D is good for macro. This shot was about 3X magnification. Buffaloberry blossom.

Photo from Archibald's gallery.
Image hosted by forum (1042898)

Raspberry bud bursting. Canon 90D and MP-E65mm

Photo from Archibald's gallery.
Image hosted by forum (1042900)