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Canon closed lens mount

  
 
Hoagie058
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p.1 #1 · Canon closed lens mount


Anyone else bothered by the fact that we can’t get a Sigma 200 F2 for RF? How about the 135 1.4?
I like Canon’s usability but this type of thing makes me rethink my switch from Sony to Canon 18 months ago.



Dec 21, 2025 at 08:48 AM
garyvot
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p.1 #2 · Canon closed lens mount


This issue has been widely complained about and discussed, I think.

I happen to be very satisfied with Canon's full-frame native RF offerings, and don't particularly miss anything, but I would like to see this change on principle. We were spoiled for choice during the EF era, and it is odd not to have that same third-party support today.

RF-S is another story though. Canon has nothing but slow, kit lenses for the most part. The good news for APS-C shooters is that Canon has opened up RF-S to third parties, and we are seeing a much more interesting set of APS-C lenses from Sigma and others (just as with the M system). I don't particularly care to rely on full-frame lenses for fast aperture primes and zooms on APS-C cameras, but I think I could probably shoot the R7 full time using Sigma's offerings.

Interestingly, Laowa has just released its new 200mm f/2 in EF mount, with the intent that it be used adapted for RF. Unfortunately, this isn't really practical outside of longer focal lengths, because the differences in flange to focal plane distance would be impossible to design around--basically, you'd have to make a different lens entirely.

As far as Canon's motivations are concerned, you may find this an interesting read:

https://www.canonrumors.com/did-canon-see-the-writing-on-the-wall-with-the-rf-mount/



Dec 21, 2025 at 09:28 AM
campy
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p.1 #3 · Canon closed lens mount


If Sony came out with a full frame camera with the size and comfort in the hands that the R has it would take away 10-15 % of Canon' sales. That would make Canon change their minds about the mount.


Dec 21, 2025 at 10:01 AM
Flowernut
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p.1 #4 · Canon closed lens mount


This is making me think hard about leaving canon after 50 years starting with the FTb. To many missing lenses in their lineup. 150-600 copy someone elses if you can't figure it out yourself. Flip in 1.4x for 600 f4. It goes on and on. Then we have the lensses they did make. 70-200mm lenses that won't accept a 1.4 or 2x making we keep the EF version. Super telephotos and zooms like the 200-800 that don't accept drop in filters. A bunch of lens I don't need or want even as a gift. Glad the EF converter works so well and thank-you for one that takes drop in filters as it has been great with my EF super wide angles.

Edited on Dec 21, 2025 at 12:22 PM · View previous versions



Dec 21, 2025 at 10:43 AM
EB-1
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p.1 #5 · Canon closed lens mount


garyvot wrote:
This issue has been widely complained about and discussed, I think.

As far as Canon's motivations are concerned, you may find this an interesting read:

https://www.canonrumors.com/did-canon-see-the-writing-on-the-wall-with-the-rf-mount/


Yes, it has. I spend far more on lenses than cameras. I'm not sure if that is typical, but I wonder how much Sony is leaving on the table with all the 3rd party lenses people use instead of buying Snoy. Maybe they make up for it with sensors and other products.

EBH



Dec 21, 2025 at 10:49 AM
Hoagie058
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p.1 #6 · Canon closed lens mount


I agree. The Canon camera’s feel so much better in the hand all the way around.

campy wrote:
If Sony came out with a full frame camera with the size and comfort in the hands that the R has it would take away 10-15 % of Canon' sales. That would make Canon change their minds about the mount.




Dec 21, 2025 at 10:50 AM
AmbientMike
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p.1 #7 · Canon closed lens mount


As far as the lenses i use, Sony never made a 150-180 macro. So I'd have to adapt EF.

Same on the 200/2, Canon has that and 200/1.8, native, that you had to adapt to Sony before the Sigma came out. Sony has to allow 3rd party to try to catch up

Sony really isn't competitive on teles, no fast super teles before 2018, apparently didn't have a good 70-200/2.8 til 2021. EF 70-200/2.8 IS II came out in 2012, 80-200/2.8 decades before that, even. It's pretty ridiculous to say Canon has no lenses like people basically try to say on here



Dec 21, 2025 at 11:01 AM
Hoagie058
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p.1 #8 · Canon closed lens mount


I am far from saying Canon has no lenses. I own and use both EF and RF. The stellar reviews that this lens is receiving made me go hmmm.


AmbientMike wrote:
As far as the lenses i use, Sony never made a 150-180 macro. So I'd have to adapt EF.

Same on the 200/2, Canon has that and 200/1.8, native, that you had to adapt to Sony before the Sigma came out. Sony has to allow 3rd party to try to catch up

Sony really isn't competitive on teles, no fast super teles before 2018, apparently didn't have a good 70-200/2.8 til 2021. EF 70-200/2.8 IS II came out in 2012, 80-200/2.8 decades before that, even. It's pretty ridiculous to say Canon has no lenses like people basically try to say on
...Show more



Dec 21, 2025 at 11:07 AM
AmbientMike
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p.1 #9 · Canon closed lens mount



Hoagie058 wrote:
I am far from saying Canon has no lenses. I own and use both EF and RF. The stellar reviews that this lens is receiving made me go hmmm.



Well, okay, but it's something people have tried to say on here , quite a bit.

Id rather have the option of the Sigma, but there's the EF versions already. And I dont shoot enough portraits really, and it's too short for wildlife. So I'm not sure what I'd use it for, not something worth change brands over imo




Dec 21, 2025 at 11:52 AM
EB-1
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p.1 #10 · Canon closed lens mount


Instead of opening the lens mount to the 3rd parties, Canon should develop some additional lenses to fill any needed gaps. Obviously there are those that like the gaggle of small primes and that cramped ergo system, but if I wanted full Sony suffering I would go there.

EBH



Dec 21, 2025 at 12:12 PM
 


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Flowernut
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p.1 #11 · Canon closed lens mount


EB-1 wrote:
Instead of opening the lens mount to the 3rd parties, Canon should develop some additional lenses to fill any needed gaps. Obviously there are those that like the gaggle of small primes and that cramped ergo system, but if I wanted full Sony suffering I would go there.

EBH


Problem is they are focused more on video and gee wiz lenses rather than practical nature photography. Not keen on lenses like the 14-35 and 15-35 that need digital correction. A 300-600mm zoom coming. Oh boy, a 2x zoom. that was ground breaking 40 years ago now it should be at least 3x and realistically 4x.

Edited on Dec 21, 2025 at 12:44 PM · View previous versions



Dec 21, 2025 at 12:37 PM
Sy Sez
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p.1 #12 · Canon closed lens mount


It basically comes down to marketing strategy, and customer affordability, and additional choices.
When I switched from Minolta, I checked out both Canon's & Nikon's offering's & chose a Canon ELAN 7E for its features, but I decided to start out with a Tamron Adaptall 28-300mm Zoom lens as an affordable start.
Subsequently, I acquired all Canon glass; but if Canon had not offered 3rd party glass to begin with, I would surely have gone with Nikon.

Sony & Nikon apparently still think that any means of enticing buyers into their system is the best strategy for the long term. Canon may rethink their position when they feel it's costing them potential customers. The old "penny wise / dollar foolish" mentality.



Dec 21, 2025 at 12:41 PM
Gochugogi
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p.1 #13 · Canon closed lens mount


After bad experiences with Sigma, Tokina and Tamron, I switched to Canon years back mainly to use their lenses. So I'm not bothered at all. Between RF and EF there are too actually many choices for me. If Canon's lens catalog were much smaller or poor I might think differently. I currently own more than 25 lenses, mostly RF. I caved and bought a recent Sigma—18-50 2.8—and it's okay on my R7 but doesn't make me long for more Sigma. Some years back, I gave all my old Sigma EF mount lines to the Salvation Army. They were fine lenses but wouldn't work on any of my EF DSLR or RF cameras due to a lack of FW support (locked up when I changed aperture). Yes, they were old but my much older EF lenses from the early to mid-1990s still work well on my R series cameras.


Dec 21, 2025 at 01:11 PM
AmbientMike
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p.1 #14 · Canon closed lens mount


It's not that I don't find anything appealing about the 3rd party sony 70-180/2.8 Tamron (which has no IS.)

But I might rather have 80-200/2.8, 70-200/2.8, 70-200/2.8 IS, 70-200/2.8 IS II, 70-200/2.8 IS III, RF 70-200/2.8, RF 70-200/2.8 Z to choose from, in addition to an untold number of 70-200/2.8 3rd party ef

There are all kinds of EF 3rd party available. I'm headed out to use my Tamron 180




Dec 21, 2025 at 01:36 PM
Sy Sez
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p.1 #15 · Canon closed lens mount


EB-1 wrote:
Instead of opening the lens mount to the 3rd parties, Canon should develop some additional lenses to fill any needed gaps. Obviously there are those that like the gaggle of small primes and that cramped ergo system, but if I wanted full Sony suffering I would go there.

EBH


I think, as to the point, it's not about Canon having, or not having lens options to fill "all" the gaps.

It's more about, all else being equal, would most buyers prefer to do business with a company that offers more options, or one that offers less options.



Dec 21, 2025 at 02:05 PM
Sy Sez
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p.1 #16 · Canon closed lens mount


AmbientMike wrote:
There are all kinds of EF 3rd party available. I'm headed out to use my Tamron 180



Currently my only 3'rd party lens is an adapted Sigma 180mm 3.5 Macro.

I'm gratefully appreciative, and surprised that Canon hasn't configured my R5 to reject, and shutdown when any lens other than a canon is attached!

Maybe I shouldn't give them any ideas, as their likely to cripple the option with a mandatory firmware release,



Dec 21, 2025 at 02:42 PM
robstein
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p.1 #17 · Canon closed lens mount


I almost always use Canon glass BUT I'd like the mount open just so Canon has to work harder on their own lenses.... competition helps all users.


Dec 21, 2025 at 05:27 PM
rscheffler
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p.1 #18 · Canon closed lens mount


Hoagie058 wrote:
Anyone else bothered by the fact that we can’t get a Sigma 200 F2 for RF? How about the 135 1.4?
I like Canon’s usability but this type of thing makes me rethink my switch from Sony to Canon 18 months ago.


Those are certainly cool lenses and caused me momentary pangs of envy. But when I evaluate how I do my work, I honestly have very little need for such lenses. Sure, I could readily use them, as I shoot social events in some venues where I'm already at ISO 6400 1/320-1/400 f/2. But would a 135/1.4 truly make a worthwhile difference? I mean, I get by fine with the 135/1.8. Do I really need even more blown out bokeh? Will my clients actually care about that? I checked reviews of the 135/1.4 and image comparisons of it wide open against 1.8, and TBH, it was mostly 'meh' for me. Sure there are differences, but not enough to give me regrets about using Canon.

I'm actually way more envious of the Sony 50-150/2...

I generally like what Canon has done with RF lenses. Yes, I strongly believe they should have released their own 50-150/2 version shortly after the 28-70/2, and am baffled they haven't yet. And there certainly are still gaps in the RF lineup, at the low, middle and upper ends. But I'm also not held back from being able to do the work I need to do with what Canon's RF stable currently offers.

Other systems will always have something interesting that my current system of choice doesn't. I guess rather than a glass half empty, I'm looking at it as a glass half full that can (and hopefully will) be filled further.

EB-1 wrote:
Yes, it has. I spend far more on lenses than cameras. I'm not sure if that is typical, but I wonder how much Sony is leaving on the table with all the 3rd party lenses people use instead of buying Snoy. Maybe they make up for it with sensors and other products.

EBH


I think it's the price Sony had to pay to get a foot in the door for their early mirrorless cameras with anyone other than those wanting them as a platform onto which to adapt legacy "alt" lenses. I mean, I tried the first couple generations of a7 series cameras and AF was poor compared to DSLRs for anything moving, and the UI was not appealing at all. But despite that, Sony's strategy paid off and has put them in a very strong market position. Even if they lose some lens sales, they're still selling bodies. And I do think some aspire to upgrade to Sony lenses when they can. This was definitely the case for someone with whom I work on a few projects. He's a generation younger and was attracted to Sony, whereas the rest of us older shooters are either Canon or Nikon. He started with an a7III (I think) and the Tamron 70-180 and 28-75 combo, and it got acceptable results needed for that work. As he gained more experience, he upgraded to an a9 and Sony 70-200/2.8 v1 and noticed a huge performance boost. A lot of that will be on the a9 vs. a7III... but there's certainly an appeal to going 'full Sony' to eliminate the restrictions Sony has imposed on off brand lens compatibility. Sony isn't entirely benevolent. They're certainly using the foothold third party lenses provide via a more affordable entry point, to migrate/convert some of those users to Sony lenses, whether for access to otherwise restricted features, or due to brand image/appeal. What we don't know is how many third party lens users eventually add Sony lenses, or how many don't see the need to do so because the third party lenses already provide everything they need. And as the third parties get better, more numerous, and address more niches, there's certainly some risk for Sony that fewer will see the need or desire to buy Sony lenses. Yes they'll still sell cameras to those photographers, but like probably everyone here, I currently have a few Canon cameras, but way more lenses. And any company will want those repeat sales.

Even if Canon doesn't open up RF more fully to third party FF lens options, we still benefit from the likes of Sony doing so because the competition will prevent Canon from ignoring the world outside their walled garden. And I think we've already seen that with lenses like the 16-28/2.8, 28-70/2.8 and 200-800. Not as cheap as third party, but also optically not far off from L lenses.



Dec 21, 2025 at 07:03 PM
Mike_5D
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p.1 #19 · Canon closed lens mount




Sy Sez wrote:
I think, as to the point, it's not about Canon having, or not having lens options to fill "all" the gaps.

It's more about, all else being equal, would most buyers prefer to do business with a company that offers more options, or one that offers less options.

If starting from zero, that might be one factor among many considered. But it's not worth losing a ton of money switching. At this point Canon has a nice range of RF lenses at various price points and capabilities and I still prefer their ergonomics over someone like Sony which affects me more than the abstract idea of 3rd party lenses that could exist.



Dec 21, 2025 at 09:43 PM
EB-1
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p.1 #20 · Canon closed lens mount


Sy Sez wrote:
I think, as to the point, it's not about Canon having, or not having lens options to fill "all" the gaps.

It's more about, all else being equal, would most buyers prefer to do business with a company that offers more options, or one that offers less options.


I much prefer to work with companies that have direct or substantial indirect control over the 3rd party suppliers. That's one of the things to check with in the contracts like master supply agreements. I'm not seeing that Canon would have much if any control over the generiac lenses, so I would avoid potential compatibility issues where possible.

EBH



Dec 21, 2025 at 09:45 PM
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