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Canon EF-S 17-55mm f2.8 Question

snegron7
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p.1 #1 · p.1 #1 · Canon EF-S 17-55mm f2.8 Question

I have a Canon EF-S 17-55mm f2.8 that I used maybe twice since purchasing it new.

I would hate to get rid of it because it is a super sharp lens, and I regret having sold nice lenses in the past (like my Canon EF 16-35mm f4.0L).

So, I have 2 questions:

1. Will it fulky work on my R6II with an EF/RF adapter? (Will the AF and metering work and will my R6II recognize it as a smaller "EF-S" lens?)

2. If I were to buy an R7, will it work flawlessly and completely (with EF/RF adapter of course)?

Sep 17, 2024 at 11:14 AM

osidesurfer
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p.1 #2 · p.1 #2 · Canon EF-S 17-55mm f2.8 Question

Yes, the 17-55mm it worked on my EOS R when I tried it, no issues. It will automatically put the camera in crop mode, so you don't need to do anything extra. I mounted it to see if it would be sharper at 2.8 with the better autofocus on a mirrorless camera. My copy wasn't.

Sep 17, 2024 at 11:30 AM

fraibert
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p.1 #3 · p.1 #3 · Canon EF-S 17-55mm f2.8 Question

The 17-55/2.8 should work perfectly on any of the R cameras (including the R7), with an adapter. Personally, some brief testing on my R5 + official Canon adapter (with control ring) worked great.

Using an EF-S lens does automatically enter crop mode on the full frame cameras. So on a R6II that means 9.3 MP images, per the manual. (Only on the R5 series among current Canon full frame bodies does crop mode reach a "respectable" 17 MP.)

As an additional data point, Christopher Frost on YouTube tested the 17-55/2.8 on a R7 and it held up pretty well. Link:

Those results suggest that the lens should have should have solid performance on any of the R full frame bodies in crop mode (remember: none exceed 17 MP in that mode) and also do well in APS-C bodies downstream of the R7--the R7's 32.5 MP sensor is extremely demanding (higher pixel density than a R5--IIRC it has the density of something like a 80 MP full frame sensor) so R7 testing will tend to show lens weaknesses that sensors with lower pixel densities may not exhibit. I certainly found the 17-55 worked well on my 7DII at 20 MP, which was the highest resolution EF APS-C body.

In fact, in optical terms the Christopher Frost review makes me feel the 17-55 is reasonably competitive with the most similar official APS-C RF mount lens, the Sigma 18-55/2.8 C. However, the Sigma is smaller and more compact, plus has a more refined package (doesn't require adapter and has a modern aesthetic instead of the Canon EF "gold ring" midtier build).

Sep 17, 2024 at 02:08 PM

garyvot
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p.1 #4 · p.1 #4 · Canon EF-S 17-55mm f2.8 Question

A good copy of the EF-S 17-55mm f/2.8 IS is still a good lens and will work on R bodies.

The only caveat I can share with you is that on the R7, this lens is known to show softening due to increased shutter shock in the middle shutter speed ranges. The only way to really avoid this is to stick to electronic shutter or to EFCS in H or slower (not H+) drive modes.

It is unclear exactly why this occurs with this lens in particular, but I would encourage you to test it all out if you should acquire an R7.

Sep 17, 2024 at 02:21 PM

Gochugogi
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p.1 #5 · p.1 #5 · Canon EF-S 17-55mm f2.8 Question

The EF-S 17-55 2.8 IS USM worked well on my R7 if I stayed in electronic shutter mode. In mechanical shutter, it had the worse shutter shock I have seen—worse than my Olympus Pen! Horrid. Shit of shit. Dung of dung. Oddly, my RF-S 18-150 is fine in mechanical shutter mode.

For me the EF-S 17-55 2.8 IS USM was more of a 18-55 lens. At 17mm, save for the center of the frame, it was really soft about 25% into the frame from the edges, even at F8 it only improved a little. I loved it on my low rez EOS 7D and 70D but found it heavy and unbalanced on the more petite R7. I've owned two of them and they were pretty much the same in terms of optical performance and compatibility with the mechanical shutter. I sold mine a few months back. Could only get about $300 for it, albeit mint. I'd rather have the Sigma 18-50 2.8.

Sep 17, 2024 at 02:23 PM

steamtrain
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p.1 #6 · p.1 #6 · Canon EF-S 17-55mm f2.8 Question

snegron7 wrote:
I have a Canon EF-S 17-55mm f2.8 that I used maybe twice since purchasing it new.

I would hate to get rid of it because it is a super sharp lens, and I regret having sold nice lenses in the past (like my Canon EF 16-35mm f4.0L).

So, I have 2 questions:

1. Will it fulky work on my R6II with an EF/RF adapter? (Will the AF and metering work and will my R6II recognize it as a smaller "EF-S" lens?)

If you're accepting the crop from 24Mp it's not about sharpness anymore, as there aren't enough pixels to capture a lot of detail anyway.

snegron7 wrote:
2. If I were to buy an R7, will it work flawlessly and completely (with EF/RF adapter of course)?
I would rather buy the RF 24-105mm f/4.0 L or the upcoming 28-70mm f/2.8 for your R6II.

Just sell the old lens. Or keep it for emotional reasons, but whatever you do, if you own the R6II, it can never keep up with that R6II and a good full frame lens.

Sep 22, 2024 at 02:13 PM

lighthound
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p.1 #7 · p.1 #7 · Canon EF-S 17-55mm f2.8 Question

This thread has inspired me to dig-out my EF-S 17-55 to try on my R5 one of these days. I almost forgot I had that lens it's been so long since I used it. Hopefully I'll find it to be a hidden gem once I dust it off and give it a go.

Sep 25, 2024 at 10:31 AM

MintMar
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p.1 #8 · p.1 #8 · Canon EF-S 17-55mm f2.8 Question

garyvot wrote:
A good copy of the EF-S 17-55mm f/2.8 IS is still a good lens and will work on R bodies.

The only caveat I can share with you is that on the R7, this lens is known to show softening due to increased shutter shock in the middle shutter speed ranges. The only way to really avoid this is to stick to electronic shutter or to EFCS in H or slower (not H+) drive modes.

It is unclear exactly why this occurs with this lens in particular, but I would encourage you to test it all out if you should acquire...Show more →

Never heard of this before (well this lens was not on my radar due to high price since its introduction

), is there some good article on this? Now that this lens can be had in second hand for a third of the new price in those old times, I bought one and it works well on my SL2.

Sep 25, 2024 at 11:33 AM

Michael Messin
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p.1 #9 · p.1 #9 · Canon EF-S 17-55mm f2.8 Question

I have an EF-S 17-55 on my R10 and my R7 and they work perfectly. I had a 17-55 I used on my 7D when I had it but sold it when I went full frame only. When I bought my R10, I wanted a fast lens (since I shoot available light indoors most of the time) and, since the price had fallen to $400 for a used 17-55, I bought one for my R7. When I got the R10, I bought a second one for it. I use the R7 and R10 for different purposes and I got tired of switching which camera I had it mounted on. I’m very happy with how they work with my cameras. I have never mounted the 17-55 on my R6 II.

Oct 05, 2024 at 05:29 PM

Gochugogi
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p.1 #10 · p.1 #10 · Canon EF-S 17-55mm f2.8 Question

MintMar wrote:
Never heard of this before (well this lens was not on my radar due to high price since its introduction

), is there some good article on this? Now that this lens can be had in second hand for a third of the new price in those old times, I bought one and it works well on my SL2.

The shutter shock is easy to test: shoot a series of images with tripod with mechanical shutter and then the same settings with e-shutter. I've owned two copies of the EF-S 17-55 2.8 IS USM since 2006 and loved it on my 40D through 90D. It was starting to show its weaknesses with the 32MP CMOPS of the 90D but still was very sharp save for 17mm. On my 7D it was horrid with mechanical shutter but fine with e-shutter. I suspect the R7 shutter is more abrupt in order to maintain 15FPS and those vibrations somehow resonate in the EF-S 17-55 2.8 IS USM. Maybe the Canon adapter contributes to increased resonance? Oddly, no problems with shutter shock with the kit lens—RF 18-150—or the RF 100-400 (or other lenses I tried).

The other oddly with the EF-S 17-55 2.8 IS USM happens during movie servo. It jerks and makes strange squealing sounds on the audio track. I sold my EF-S 17-55 2.8 IS USM to MBP last Spring and went native.

Oct 05, 2024 at 10:31 PM


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