New adapters coming for the RF mount [CR2]

tiggy@mac.com

Pentax K-1000
Jan 20, 2014
603
410
Thetford, VT
www.ForestMetrix.com
I believe the APS-C speedbooster one is the idea I threw out a few days ago. If they're using the reduction in image circle down to the APS-C size, then you'd have a 1120mm f/8 on crop. If, on the other hand, it was a straight speed booster on full frame, you'd have a 560mm f/8 on full frame. Did I do that right?

You all might be missing the real opportunity here: 800mm f/11 + RF-S speed booster on an RF-S body. Ratchet that image circle down to 1.6 crop, and you now have an effective 1120mm f/8. In fact, that might be the primary reason those f/11 lenses exist.

 

davidhfe

EOS RP
Sep 9, 2015
302
443
And idea if this would this be an EF to RF or an RF to RF speedbooster? I guess I can see it either way...
 

padam

EOS R
Aug 26, 2015
1,011
645
And idea if this would this be an EF to RF or an RF to RF speedbooster? I guess I can see it either way...
I already wrote it down, you can't attach it to a mirrorless lens, which uses all the available space for its optics, only SLR lenses which need a separate adapter, this EF to RF adapter can be exchanged for the Speed Booster adapter.
 

flip314

EOS RP
Sep 26, 2018
280
418
I believe the APS-C speedbooster one is the idea I threw out a few days ago. If they're using the reduction in image circle down to the APS-C size, then you'd have a 1120mm f/8 on crop. If, on the other hand, it was a straight speed booster on full frame, you'd have a 560mm f/8 on full frame. Did I do that right?




For some reason my first reply went into another thread, but speedboosters work by shrinking the image circle and effectively concentrating light. It works like a reverse teleconverter. If you take an 800mm f/11 lens and shrink it from full frame, you'll end up with something close to an 800mm f8 lens on APS-C. You don't get to keep the crop factor as well as gaining the stop.

Full frame to full frame speedboosters can't really exist because the resulting image circle won't still cover the whole frame. (I suppose theoretically the tilt-shift lenses might work since the original lens has a larger image circle than full frame --though I don't know by how much-- but you'd no longer be able to shift and keep a full frame image).
 

gbc

EOS M6 Mark II
Oct 19, 2018
56
78
I'm more interested int why the R5 and R6 don't ship with at least the basic RF adapter. People have been waiting years for these cameras, and the price is a steep premium... The outlay for the R5 and even two RF lenses is over $5000. You can't include the $100 basic adapter? I feel like if the original R came with one, these should as well.
 

bhf3737

---
Sep 9, 2015
558
852
Calgary, Canada
www.flickr.com
PL to RF and EF-Cinema Lock to RF are quite probable and will allow using existing PL/EF lenses to RF mount cameras.
But speed-booster is more interesting, and an indication that RF mount camera with APS-C or Super 35 sensor is going to appear. That would be great news for video shooters or anyone who wants RF mount camera with cropped sensor.
 

adigoks

EOS 750D
Jul 12, 2020
30
37
A speedbooster from FF to APS-C/Super35 would have at least the following uses:

  • 4K with EOS R without crop
  • 4K in R5 crop mode to reduce heat output
  • Adapt EF to a hypothetical Super35 RF mount video-oriented body
  • Adapt EF to a hypothetical APS-C RF mount body
  • Shoot more manageable-sized stills with future high-res R body in crop mode
damn... what a BIG BRAIN MOVE FOR SURE if its real .

edit :
after awhile...it got me thinking... that adapter makes R5 unable to record 4K 120P no?
also it maybe more suitable for R6 cause it FF 4K also overheat hard & there is no workaround other than shooting 1080p after that. canon can introduce 1.4X Crop 4k mode in future firmware. with that & speedbooster, R6 can record longer & doesn't lose it FullFrame look.
 
Last edited:

Shellbo6901

EOS M50
Jan 16, 2015
32
6
My R didn’t come with it, but Best Buy and others gave it away if you purchased the camera. still you’d think they would include it, because mine with kit lens was still 2899 and even that was a bundle to save $500 aka 3399.99 ‍♀
I'm more interested int why the R5 and R6 don't ship with at least the basic RF adapter. People have been waiting years for these cameras, and the price is a steep premium... The outlay for the R5 and even two RF lenses is over $5000. You can't include the $100 basic adapter? I feel like if the original R came with one, these should as well.
 

Alam

I'm New Here
Dec 24, 2019
13
6
If Canon could figure out a way to adapt M-series lenses to the RF and visa versa with backfocus correction optics, I would gladly pay handsomely for one...too bad I don't think anyone else would. Haha
I would, love the efm 22 and 28 macro will be amazing with RP focus stacking
 
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AdmiralFwiffo

Terrible photographer
Feb 17, 2020
39
52
Current speed-boosters on the market won't get a full stop from boosting the 50 f/1.0; it would be cool if we could with this one, but I doubt it.
 
Jul 13, 2020
128
372
Non-video guy here, but I have a question:

If this rumor is true, and that a cinema to RF adapter is being offered, does that mean:
a) A cine line of RF lenses is never happening?​
b) Canon will not make an RF cine body?​
c) Canon is just being wise and maximizing the RF platform's appeal to sell more R mount bodies?​
d) Canon just wants to sell more PL lenses and this is a way to do it?​
e) Canon would rather monetize mount conversion into a product (adaptor) rather than a service (an actual physical mount conversion)?​

I don't know if such adaptors were expected or a very big piece of news. Which is it, and why?

- A
F: none of the above (maybe partly C)? Baffled by E: why would any company want to tear apart bodies and lenses for permanent mount conversions?! Also the mounts are not just physically different but have different power and data capabilities that require the physical space of an adapter to solve to house the circuits and the physical mount conversion. Canon could never do permanent mount changes to most products directly for this reason. Adapters are the best solution until native products are pervasive, and also sure, maybe they make a few bucks on them during the transition. There have been some pretty innovative things already like the filter drop ins and control ring that make these cooler than just adapting lenses.

I'm 100% sure a cine line of both lenses and bodies IS happening. The RF mount has more data and power pins and a better flange distance for optics. The RF glass is turning out smaller and sharper than EF by slight to decent margins, and is the line getting all the new nano focus motors. Canon offers a de-click service to remove audible clicks for the control rings which shows you they are thinking pro video use. There is no chance they will not apply RF to cinema cameras and lenses, it would be an insane waste of developed technology and marketability. The rumors are all over it, the patents too, and of course it just seems common sense that they will do this.

Canon is making all these high quality lenses and adapters early with their first big R mount cameras to give us lots of easy choices to transition from EF to RF as quickly as possible while not having any customers feel compromised while Canon transitions their incredible EF lens lineup to the new RF mount. The adapters also will cover development and release cycles of specialty lenses. I'm not going to have any issue shooting a 5D4 and R5 side by side, for example, using all EF glass and an adapter at first, or continuing for as long as I need/want to. No pressure to upgrade now, but I have the option of both EF/RF worlds. Down the road when I have enough RF lenses, which I'm sure I will gradually add one at a time, I can get a second R5 or EOS R or whatever and maybe ditch the EF cameras, EF adapter and EF glass unless there is a good reason for still keeping it by then.

Canon will need to begin filling in specialty lenses to really replace the EF mount, or get third parties to start making RF sooner than later. One area Canon is weak is astro capable landscape lenses. The EF 16-35iii was steller for coma and sharpness to the corners and could have been perfect, but had over 4 stops of vignette wide open. So I have to carry 3 different third party EF lenses to get the best night images at 14, 24, and 15-30mm (Two Samyang/Rokinon manual primes and the Tamron 15-30mm are about the best night astro landscape lenses you can get at any price). Tilt shift and a few other specialties lenses will also take a while to develop on RF.

No, I don't think Canon is playing any games, they are being more open and wise than certain past market choices to make lens and body options and combinations so easy to choose that all kinds of gear will sell, while gradually bridging the gap to RF tech.

With the 24-105, the 15-35, and the 100-500 RF glass, and a few other classic focal lengths many of us will be able to switch away from adapters sooner than later. Much different approach than Sony and others, who rolls out really expensive glass slowly on an old mount way behind their cameras, leaving many shooters using adapters for years. I'm pretty sure these adapters are a well designed and easy to cross bridge in time for EF to RF until the RF line and cameras are so mature that EF is left in honored history.
 
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Apr 15, 2020
28
14
A speedbooster from FF to APS-C/Super35 would have at least the following uses:

  • 4K with EOS R without crop
  • 4K in R5 crop mode to reduce heat output
  • Adapt EF to a hypothetical Super35 RF mount video-oriented body
  • Adapt EF to a hypothetical APS-C RF mount body
  • Shoot more manageable-sized stills with future high-res R body in crop mode
Also it could be compatible with the RED Komodo, which is a S35 camera.