Thank you both - you've been most helpful.
The results I'm getting are sometimes so good I have to check to confirm I didn't have a tripod with me, but I was wondering whether I could tinker and get it even better.

Nemorino said:

Have You tested the lens with TC on a DSLR? Might be a software problem EF/RF as the RF TC works without problems. And it is unlikely both EF-TC fail at the same time.

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I have no DSLR on which to test it. The idea of removing the R-series body from the equation is a good one, though. I did try the EF extenders with 600/4 II on my EOS M6II, which I believe uses the standard EF communication protocol. Same result – bare lens is fine, extenders are F00. So while I agree that it's unlikely they both failed, I do think that's what happened.

I will meet up with someone who has an EF 1.4xIII at some point. In the meantime, as I suggested above I can use the RF 1.4x with the modified adapter, which is what I did yesterday morning.

My idea above that I could edit the EXIF and at least get DxO to use the lens profile for the 600/4II + EF 1.4xIII turned out to be possible with a fair bit of digging. Through some trial and error, it turned out that there is no need to change the Lens Model or Lens ID number in the EXIF, all that's needed is to set the Focal Length to 840.0 mm and set the Aperture to 5.6, then DxO correctly 'guesses' that the combo is the 600/4 II + EF 1.4xIII. (Took a bit longer to get there since Exiftool reports "Sorry, Aperture is not writable," because the real name of that field is fnumber.)

So, does it matter? The lens profile (albeit with the 'wrong' extender) corrects a very small amount of vignetting and barrel distortion (easier to see when dynamically flipping between the images rather than the static images below), but the lens-specific sharpening does make a noticeable difference. Could have gotten there by doing that manually, I suppose. The file with the original EXIF is on top, bottom panels are after changing the focal length and aperture in the EXIF metadata.



So at this point, it's mainly academic. I have a functional combination of 600/4 + 1.4x extender, and a working lens profile for easy RAW conversions. I could buy a used EF 1.4xIII (B&H has a 9+ copy for $300), but I don't really see much point.

I'll stick with using the RF 1.4x on the EF lens, and hope that Canon comes through with a new RF 600/4 with a switchable 1.4x soon. Canon, are you listening?!?

I will probably call Canon and inquire at some point, I think they still service the EF III extenders so I'll at least check repair costs to see if it's worth doing that before selling them, which would be an alternative to using them for juggling practice.

As expected from the observed moon flare, sun flare is pretty noticeable with RF 14/1.4. If the sun is in the sky, with the 14mm FoV there's a good chance it will be in the frame.

"Mount Auburn Sphinx"

EOS R1, RF 14mm f/1.4L VCM, 1/3200 s, f/1.4, ISO 100

Another advantage to the wide FoV, as long as you're willing to crop away half your image, is that you can avoid the keystone effect in architecture shots by keeping the camera level and still get the whole building in the (top half of the) frame.

"Mount Auburn Cemetery Chapel"

EOS R1, RF 14mm f/1.4L VCM, 1/800 s, f/4.5, ISO 100

Canon Rumors said:

Yes, there will be a light mode. It's almost ready to test out.

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Cool.

This is all very nice but...
Where is my 14mm TS-E ?
And, why not, a New FF Canonet?

Click said:

Lovely! I really like the firs one.

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Thanks, Click! I prefer it also. The second was obviously for the snowy contrast.

Canon Rumors said:

A few weeks ago it came to our attention that a new camera lens brand Vistilen was going to be launched autofocus lenses for the RF mount for both APS-C and full-frame sensors. Like most of the world, I had never heard of the brand, but it was somewhat interesting. Who is Vistilen? It looks […]

See full article...

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These lenses have been available in Vietnam for over a year (probably in other asian markets too). There are reviews on YouTube.

neuroanatomist said:

Yeah, but that lens only has an 86x zoom ratio, 9.3-800mm (18.6-1600mm with extender). A better 'deal' is the UHD DIGISUPER 122x 4K box lens that is 8.2-1000mm (16.4-2000mm with extender). That one sells for $213K (and @becceric it's 400 g lighter, weighing in at only 26.6 kg).

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Ahh... GAS. And weight savings!
I used to be that way about bicycles.
That lens does make my EF 11-24mm feel like the RF 40mm pancake!

If this turns out to be true, this would be an instant purchase for me. I've been using the old EF 180mm for years.

Zudo said:

What I want is a high quality camera that has both wide angle but also with a zoom more like the 740, with a 40X to be a high end travel camera. If they did a Powershot V3 then it needs minimum of 20x but ideally a bit more zoom. I would pay more if it had wide angle, high image quality and with big zoom; $1200 to $2000. If it was on that higher end price it would be more like a combo of the 750 & V3.

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But that new compact travel zoom camera need to have raw instead of only jpeg.

I'm new to the R1, I still have my OG R6, prior to that I used to be a 1D-X shooter.
To my surprise, apparently the R1 does not feature an in-camera trimming/cut tool to cut videos. As a wildlife shooter, I generally cut the videos in-camera, as I often need only couple of seconds from a footage and by doing so I could save up space on my hard drive. Surely, I can get around by cutting footages on my PC with a software like Loseless Cut, but I did not expect the R1 no to have that feature (lower end bodies all have that).

Also, the R1 not having waveforms is unexpected, as R5II has it.

Not being able to assign pre-capture to a button is weird, although you can get around that with different custom shooting modes. You can assign pre-recording to a button in video mode, however.

I know my R6 inside-out, the R1 is still a bit overwhelming at first, as it is highly customizable. It is definitely a most capable camera I have ever owned, though. I noticed it is far more reliable in back-lit situations than any camera I have used, I guess it has to do someting with the cross-type AF point.

Any insights from R1 users would be appreciated!

Still waiting for the unicorn to appear

erader said:

the sigma 28 f1.4 art is an outstanding lens. i did sell mine tho when i switched to mirrorless in december because i got the 24 f1.4 VCM. i shoot lots of milky way

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I miss my 28mm Art because it was the only option, and because it was so good but, to be honest, I don't miss carrying it.
I've gone full RF since 2024. Now I only keep the adapter for the case I ever need an EF lens for work.

MSH411 said:

The used market for an R7 in excellent condition is $1200 to $1300, at $800 that body would be a steal.

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MPB would obviously mark it up. that is the price to me as a seller. And I noticed a couple sites have it at 1000 now....

Hello, I am currently using a Questtel SDI-over-fiber extender with RS-485 data for serial control. I have recently switched to a Canon CR-N300 camera, which provides an RS-422 interface for control. Given the differences between RS-485 (2-wire, half-duplex) and RS-422 (4-wire, full-duplex), I would like to confirm whether it is feasible to implement an RS-485 to RS-422 conversion within the signal path and maintain reliable communication over the existing fiber extender.
Specifically, can a protocol-transparent hardware converter be used in this scenario?
Any recommendations on compatible solutions for integrating RS-422 control over the current infrastructure would be greatly appreciated.

Still hope they will give the new compact camera's also raw instead of only jpeg

Some circular examples.

Dragon said:

I agree that CE will be affected for years, but for a different reason than the implied shortage. The continuation of the AI boom is dependent on continued financing and so far a lot of the money is flowing in a loop (or not flowing at all). Nvidia invests in an AI company and then the AI company agrees to buy Nvidia GPUs, but as you say, there is no power to run the beast. They hype causes gullible investors to throw money at the AI company and by association at Nvidia, which has a completely ridiculous market cap. The timeline is too long for investor patience to last, even if there is some magic application out there that could eventually produce enough revenue to fund the monster. When the house of cards collapses, the dot com bust will look like child's play and the ensuing recession will have an effect on CE for years to come. Take pictures and invest wisely.

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I wasn't exactly intending to enumerate all the causes of the likely years-long implosion of consumer electronics.

I agree with the description of the AI "boom" as a venture capital scam, see here: https://pivot-to-ai.com/2025/08/23/...e-think-the-ai-bubble-keeps-going-until-2027/

And I think it will indeed keep going into 2027. If it was based on investment fundamentals in any way, it would already be over. It is not gullible investors exactly, but self-interested venture capital scammers (that's their only "innovation": endless fraud) AND plenty of idiots AND people just jumping on the bandwagon because the markets and institutional investors function on FOMO.

The memory and storage supply implosion right now is caused by AI "hyperscalers" (people hoarding chips for datacenters that aren't built and for which there is no profitable use) buying out the entire supply of memory manufacturers - there are only 3 meaningful manufacturers on earth for RAM, which was already a very corrupt cartel. When AI collapses, the likes of Micron will still have no consumer supply, so prices will stay elevated for some time (and they will try to keep them up even when supply increases as there is no competition).

"Crucial" is Micron's consumer business, which they've ended because they're making so much money on datacenter HBM, which is not usable for anything else (similar to crypto mining chips, which were sold to many of the exact same people pushing AI).

Smaller electronics retailers and product lines will be crushed because with DDR5 RAM at 5x price vs. a year ago and fast SSD storage at something like 3x, a lot of consumers simply stop buying certain things entirely. As I said the other day, I'd have bought a 2nd 4TB external SSD the other day, but it has doubled in price. It's something I could use, but will get around until I have absolutely no choice.

Anyways yes, the recession from the AI crash will also further implode consumer demand and buying power, added on top of the tariff nonsense and the monumentally stupid imperial ambitions in the middle east. Everything will be worse for consumers for a long time.

Reference material/comments:
Here's a more recent article on the bubble, the timeline, the years required to rebuild supply lines, and "hyperscalers" buying more chips than they can use purposefully: https://pivot-to-ai.com/2026/03/27/the-ai-bubble-and-the-global-polycrisis/. Ed Zitron has dug into the numbers a lot, and only 1/3rd of claimed data centers are actually being built: https://www.wheresyoured.at/the-ai-industry-is-lying-to-you/.

OpenAI shut down its Sora video slop model the other week; of course, video models are the pinnacle of setting money on fire. They still only make worthless memes, but they cost astronomically more to run than text or still image generators. This is one of the first real cracks in the glass.

I think the "Subprime AI crisis" analogy is a good one (Ed first brought it up in 2024, but his most recent article breaks down a ton of numbers here: https://www.wheresyoured.at/the-subprime-ai-crisis-is-here/).

mangobutter said:

Shucks, so no AF at ALL when using the 1.4x III.

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You can AF with the combination in Live View. It’s slow, but it works. Live view works at f/11 with the 2x TC as well.

It's rough. Photographers will have nothing left to buy.

Schwetzingen Garden Mosque in the Schwetzingen Palace and gardens

One of my absolute favorite places in the world! The garden is really beautiful and I got these nice (imo) pics there.


Pic 1

Copland said:

...am I the only one bothered by this unfinished, sharp-edged mounting point?

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It's never been a nuisance for me, never actually thought about it until seeing your post. The edges do have some rounding, and don't feel sharp against my skin. I'd really have to work hard to scratch myself.

I can see how that would scratch up some delicate surfaces, though. Or even becoming annoying when hand holding. But you can simply turn the collar, so the mount isn't sitting against a surface or resting in your hand.

Ended up getting the R6 mkiii for $2150 new in Taiwan.

EthenJ said:

I use my R50V for photography, and like it, but no IBIS is painful.

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UBIS is available and quite affordable for the R7.

One example of Under Body Image Staabilization:

Benro MAD49A Adventure Series 4 Aluminum Monopod

​

mb66energy said:

Most interesting minor point is: Where goes the thumb wheel?

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"In hell, where I sent her." - Po Campo, the potential new cook in Lonesome Dove, when asked in San Antonio if he had a wife he'd miss and want to go back to when the cattle drive was halfway from Texas to Montana.