Thanks for reviewing this TC - I will be buying one to play with on my EF 11-24 and 35mm 1.4Lii. Looking forward to that extra stop of light and cropped video with native FOVs
The only reason I can see for this product is video options that are only available in crop mode (C70?) and (potentially) a RF crop camera. Using it for stills in crop mode on a FF camera to get better aperture is cancelled out by not using the full sensor area. Maybe Viltrox know something about future crop cameras I dont.
The R5's crop 4K is amazingly good quality, which was kind of overlooked with all of the issues about full frame recording and overheating. This speedbooster would definitely well serve anyone who likes to shoot video on their R5 with EF lenses.
I saw a second hand one of these the other day for EF to M43 mount and am now researching it - my main consideration being image quality when used. I have some lovely Zeiss glass in EF mount and because these lack an aperture ring they must be controlled through the camera body and that is really the main thing I am looking for - they are all manual focus so AF performance is not a consideration. I do presently have a sigma MC-11 adapter which allows me to mount and use these lenses on my Sony A7s body - which works fine. But the idea of using the same Zeiss glass on my older Olympus OMD Em5 is appealing - as is the ability to get a field of view that is a bit more like these lenses would have on a full frame body ( though not exactly of course due to the exaggerated M43 crop factor). The Sigma adapter does not have and does not glass elements as it is designed for use on a FF Sony body.
I sure would like to have this reducer paired up with my EF 70-300L zoom on the R10/R7 cameras to see if there is an image quality hit at the long end. Gaining nearly a full f-stop is a big deal in the telephoto world even though the extra reach of the crop factor is lost. Also curious to know what the EXIF info shows in the images.
I just stumbled across an old Pentax 1.7x AF adaptor that makes old manual focus lenses become autofocus by moving the optics of the extender. Wonder if they'll ever make a speed booster like that.
@@DustinAbbottTWI yeah, I'd assume you'd have to prefocus with longer lenses similar to how you have to with the Techart Pro AF adapter, though focusing with an optical block within the adapter itself instead of the adapter moving the entire lens in and out. That would probably alleviate the "wobble" issue that the Techart adapters tend to develop over time which makes the plane of focus slight off center due to the lens being very slightly tilted at full AF extension.
for still, this is a great way to get full frame equivalent images from crop sensor camera, for instance, to use Zeiss ZF/ZE lens on E-mount via metabones adaptor.
I'm resurrecting this, Dustin, in the interest of the R7/R10. My plan is to order this as the sole EF Converter for my R7 when I order it later this month pending supply chain. I already own their M->EF for the M6 Mk II and I love it on that body. I also use the E->EF on my a6600 and I have been very pleased with that one also. I am hoping that when you review the R7, you will at least throw this on there and give a quick synopsis of what you think. I'm betting this will be a killer combination on the RF mount APS-C line from Canon.
got several questions about this adapter. 1. is the lower F number is only affecting the DOF or also the amount of light captured? 2. how many stops it will add up? 1, 2? thanks and this is a good review like always
Nice review Dustin, if Canon decides to make an R7 aps-c camera this could be handy - I presume I could use my EF lenses such as my EF135mm f/2.8 with this which make it equivalent to 153mm f/2.47 with a slight crop of 1.136 ? Is my maths correct or have I misunderstood ? If the aps-c sensor is say 30mp using this would crop it 1.136x giving 26.4mp ? Thanks Noel
Dustin, thank you for review. And forgive my ignorance, I need some help understanding. Using a full frame EF 35mm f1.4 With Viltrox Speedbooster x0.71 The lens effectively becomes a 25mm f1.0 correct? Then mounted on a Canon R5 With an APSC crop of 1.6 Effectively the end result is a 40mm f1.6 lens correct? In the end you got a 40mm f1.6?
I think you are correct. 0,71 is the reverse factor of 1,414 that is what you multiply each aperture value to get the next one. This speed booster is designed to get 1 stop aperture back (1,4) and not the apsc crop (1,5 or 1,6 in Canon)
@@andrear9500 my notion was that both Focal Length and Aperture has to be multiplied by the crop factor to get the correct effective. If what I presume to be true, then this product makes very little sense adapted to an R5 or any other Full Frame RF body. On a R5 it's better to use a regular EF to RF adapter with full sensor coverage. And crop mode if you want the extra reach of 56mm. The only sense this makes is if the user is adapting a Full Frame EF lens to an RF crop sensor body (which doesn't exist) With this adapter on a RF APSC body instead of a 35mm f1.4 becoming a 56mm f2.2, it acts as a 40mm f1.6. I think I am correct, but I am open to learning, if I am missing something.
The biggest advantage of a speed booster is really when shooting video on a camera that applies a crop factor in video. It would allow you to get the proper angle of view (roughly) and aperture even after the crop factor is applied (say, for example, 4K on the EOS R).
@@DustinAbbottTWI I have the VILTROX EF-EOS M2 Speed Booster. The internal lens corrections do not work with this. It is possible to activate them in the menu (!!!) on the Canon Eos M50. But if you check the functions in RAW recording, all remain disabled. It works with the Canon Mount Adapter EF-EOS M. When the lens corrections are activated in the menu, they are also activated in the RAW recording. Thanks very much!
I'm super curious if the video IBIS works better with wide-angle lenses through the speed booster. I know that my R5's IBIS works much more effectively on wide-angle lenses if I'm in crop mode because it essentially crops out the image wobble. So, in theory, a speed booster would force the lens wobble to the outside of the frame, making the r5's IBIS for vlogging at 16mm great again? Could you try maybe before I pull the trigger to try for myself lol
I know u mentioned video isn't quite your field but you could've / should've also tested this adapter with the autofocus efficiency when shooting video
I am sure that numerous enthusiasts who are videocentric will do full reviews in short course - they certainly did when Viltrox produced the EF - EF-M speedbooster.
What is the benefit? Isn't the crop image at f1.0 exactly the same as the full frame image at f1.4, but smaller? Same light gathered, same bokeh relative to the features of the image, just fewer megapixels.
Advantage will be if you're 1) shooting on a crop camera and want to preserve the full frame angle of view, or (more likely) 2) if you are recording 4K video that has a crop factor and want to preserve the wider angle of view with a shallower depth of field.
I appreciate and respect your opinions and expertice Dustin. I have preordered the R7 and I'll be using it with the rf100-400mm lens. What could I expect from using this speed booster with that combo? A drop in aperture at 400mm to 6.3 or 7.1? Just wondering if it might be a good addition to my kit shooting birds and wildlife. Thanks for any info and best of luck to you!
Fun fact: sigma art 40/85/105/135 and proably some more, have a huge circle of light, meaning you can cover full frame with 0.71x, making most of the lenses a real representation of f/1 and focal length reduced by 0.71x. Sigma 105/1.4 will work like 75mm f/1 full frame lens.
It’s a little more complicated than that. You would have to use it in APS-C mode, so its hardly worth doing for stills. For video, though, you would get more the natural angle of view of a 50mm lens instead of the heavy crop.
Sorry but you will not get anything to play compared to using the lens natively. What you gain with the booster you will lose by cropping. There is no free lunch. The lens produces what it produces.
Don't buy viltrox products if you using canon as if any issue will come up with your camera canon service centre people will just dismiss it saying it's because of third party product forcing you to buy canon one
This adaptor makes no sense UNLESS you absolutely need to shoot apsc (in video mode or future crop sensor rf body) Let’s be clear, a 35 mm f/1.4 adapted on a crop sensor makes a 24 mm f/1 on APSC, which is obviously equivalent to that 35 mm f/1.4. You DO NOT get the f/1 advantages on light gathering, DOF or bokeh. People should NOT buy this unless shooting cropped has an advantage, such as better 4K or on (future) cropped sensors.
The most important application at the moment will be on cameras like the EOS R that have a big crop factor for 4K. This will allow people to get the proper angle of view. It will also be useful on future RF mount APS-C cameras.
![Canon R7 with Canon Speedbooster 0.71x and EF-S lenses [ Part 2 ]](http://i.ytimg.com/vi/PdqBnlA3Djg/mqdefault.jpg)
I just ordered the Viltrox EF-R3 Pro 0.71x Focal Reducer for my R7 - as soon as it appears I give you my first impression
Sounds like fun!
That's the setup Im interested in - please report back here your imopessions of it
just wanted to ask about the R7. I am specially looking for a speed booster to use on my R7
Thanks for reviewing this TC - I will be buying one to play with on my EF 11-24 and 35mm 1.4Lii. Looking forward to that extra stop of light and cropped video with native FOVs
Exactly. Enjoy!
The only reason I can see for this product is video options that are only available in crop mode (C70?) and (potentially) a RF crop camera. Using it for stills in crop mode on a FF camera to get better aperture is cancelled out by not using the full sensor area. Maybe Viltrox know something about future crop cameras I dont.
It will definitely be handy if for when a crop sensor RF camera comes out, and definitely useful for video in some applications now
Also 4K HQ with crop on R5 does not over heat, so it could be useful for long recording 4K HQ
That could be an excellent application
The R5's crop 4K is amazingly good quality, which was kind of overlooked with all of the issues about full frame recording and overheating. This speedbooster would definitely well serve anyone who likes to shoot video on their R5 with EF lenses.
Thanks Dustin ! and of course a awesome New Year !
Thank you. Happy New Year to you, too
Is good to see that this speed booster does not affect the image quality on the corners
I found the IQ pretty good, for sure.
@@DustinAbbottTWI thanks for the great review btw 🙏
love using these on crop cameras. superfast lenses in tiny form and they are what they are, nobody notices pixels when the content is good
That’s true
With Canon Apsc (R10 & R7) now announced this speedbooster will be useful with RF lenses.
That's definitely true.
I saw a second hand one of these the other day for EF to M43 mount and am now researching it - my main consideration being image quality when used. I have some lovely Zeiss glass in EF mount and because these lack an aperture ring they must be controlled through the camera body and that is really the main thing I am looking for - they are all manual focus so AF performance is not a consideration. I do presently have a sigma MC-11 adapter which allows me to mount and use these lenses on my Sony A7s body - which works fine. But the idea of using the same Zeiss glass on my older Olympus OMD Em5 is appealing - as is the ability to get a field of view that is a bit more like these lenses would have on a full frame body ( though not exactly of course due to the exaggerated M43 crop factor). The Sigma adapter does not have and does not glass elements as it is designed for use on a FF Sony body.
That's correct.
This is perfect the canon r10 with the canon 70-200mm f4
So now I can use my beloved Sigma 18-35 f1.8 Art on my R6? Previously it automatically switched over to apsc mode and only gave me about 9mp.
I think you are still in APS-C mode, unfortunately
I sure would like to have this reducer paired up with my EF 70-300L zoom on the R10/R7 cameras to see if there is an image quality hit at the long end. Gaining nearly a full f-stop is a big deal in the telephoto world even though the extra reach of the crop factor is lost. Also curious to know what the EXIF info shows in the images.
Sounds like fun.
Very useful points on the nuances of using a speed booster
Glad it was helpful!
I just stumbled across an old Pentax 1.7x AF adaptor that makes old manual focus lenses become autofocus by moving the optics of the extender. Wonder if they'll ever make a speed booster like that.
There actually have been adapters like that recently, though they have limitations.
@@DustinAbbottTWI yeah, I'd assume you'd have to prefocus with longer lenses similar to how you have to with the Techart Pro AF adapter, though focusing with an optical block within the adapter itself instead of the adapter moving the entire lens in and out. That would probably alleviate the "wobble" issue that the Techart adapters tend to develop over time which makes the plane of focus slight off center due to the lens being very slightly tilted at full AF extension.
for still, this is a great way to get full frame equivalent images from crop sensor camera, for instance, to use Zeiss ZF/ZE lens on E-mount via metabones adaptor.
Right
Fantastic for the new R7 and R10, if you get the time Dustin please give us your feelings on that combination
It should be excellent for those, for sure.
I'm resurrecting this, Dustin, in the interest of the R7/R10. My plan is to order this as the sole EF Converter for my R7 when I order it later this month pending supply chain. I already own their M->EF for the M6 Mk II and I love it on that body. I also use the E->EF on my a6600 and I have been very pleased with that one also.
I am hoping that when you review the R7, you will at least throw this on there and give a quick synopsis of what you think. I'm betting this will be a killer combination on the RF mount APS-C line from Canon.
I've heard the same from several people. Something like this makes a lot more sense, now.
got several questions about this adapter.
1. is the lower F number is only affecting the DOF or also the amount of light captured?
2. how many stops it will add up? 1, 2?
thanks and this is a good review like always
The lower F stop affects both DOF and the light captured. It is a one stop difference.
@@DustinAbbottTWI thank you Dustin, really appreciate your prompt reply 👋
Thanks for the review, Dustin. What about video continuous auto focus? Thanks again.
The quality is always going to depend on the lens, but it seemed pretty good for the most part.
Nice review Dustin, if Canon decides to make an R7 aps-c camera this could be handy - I presume I could use my EF lenses such as my EF135mm f/2.8 with this which make it equivalent to 153mm f/2.47 with a slight crop of 1.136 ?
Is my maths correct or have I misunderstood ?
If the aps-c sensor is say 30mp using this would crop it 1.136x giving 26.4mp ?
Thanks
Noel
I don't think you would have additional crop on such a body. It should cover an APS-C image circle fine.
Hi Nice review ... have you heard about the fact that it's no more available by viltrox ??
I hadn't, no.
Will there be a review for the Viltrox EF-E ii booster?
No immediate plans. I'm booked through the end of the year already.
Dustin, thank you for review. And forgive my ignorance, I need some help understanding.
Using a full frame EF 35mm f1.4
With Viltrox Speedbooster x0.71
The lens effectively becomes a
25mm f1.0 correct?
Then mounted on a Canon R5
With an APSC crop of 1.6
Effectively the end result is a
40mm f1.6 lens correct?
In the end you got a 40mm f1.6?
I think you are correct. 0,71 is the reverse factor of 1,414 that is what you multiply each aperture value to get the next one. This speed booster is designed to get 1 stop aperture back (1,4) and not the apsc crop (1,5 or 1,6 in Canon)
@@andrear9500 my notion was that both Focal Length and Aperture has to be multiplied by the crop factor to get the correct effective.
If what I presume to be true, then this product makes very little sense adapted to an R5 or any other Full Frame RF body.
On a R5 it's better to use a regular EF to RF adapter with full sensor coverage. And crop mode if you want the extra reach of 56mm.
The only sense this makes is if the user is adapting a Full Frame EF lens to an RF crop sensor body (which doesn't exist)
With this adapter on a RF APSC body instead of a 35mm f1.4 becoming a 56mm f2.2, it acts as a 40mm f1.6.
I think I am correct, but I am open to learning, if I am missing something.
The biggest advantage of a speed booster is really when shooting video on a camera that applies a crop factor in video. It would allow you to get the proper angle of view (roughly) and aperture even after the crop factor is applied (say, for example, 4K on the EOS R).
@@DustinAbbottTWI You are correct my friend can’t wait to get one for my RP
Hello, thank you for your great review! Do canon camera's internal lens corrections work with genuine canon EF lenses?
They should. Electronic communication remains as normal.
@@DustinAbbottTWI I have the VILTROX EF-EOS M2 Speed Booster. The internal lens corrections do not work with this. It is possible to activate them in the menu (!!!) on the Canon Eos M50. But if you check the functions in RAW recording, all remain disabled. It works with the Canon Mount Adapter EF-EOS M. When the lens corrections are activated in the menu, they are also activated in the RAW recording. Thanks very much!
This speedbooster would be great on the new R7 or R10 camera's.
That's definitely true.
I'm super curious if the video IBIS works better with wide-angle lenses through the speed booster. I know that my R5's IBIS works much more effectively on wide-angle lenses if I'm in crop mode because it essentially crops out the image wobble. So, in theory, a speed booster would force the lens wobble to the outside of the frame, making the r5's IBIS for vlogging at 16mm great again? Could you try maybe before I pull the trigger to try for myself lol
I didn’t see that wobble, but I can’t say for certain as I’m out of town and can’t test further
@@DustinAbbottTWI No worries! I appreciate your willingness to do so! What lenses did you end up trying it with?
Super review, as always.
Maybe, somedays, we'll finally see a tilt/shift adaptor, or just keep dreaming.
Doing tilt or shift often requires going from a larger to a smaller mount to allow room for the shift
I know u mentioned video isn't quite your field but you could've / should've also tested this adapter with the autofocus efficiency when shooting video
I am sure that numerous enthusiasts who are videocentric will do full reviews in short course - they certainly did when Viltrox produced the EF - EF-M speedbooster.
That’s a fair point
What is the benefit? Isn't the crop image at f1.0 exactly the same as the full frame image at f1.4, but smaller? Same light gathered, same bokeh relative to the features of the image, just fewer megapixels.
Advantage will be if you're 1) shooting on a crop camera and want to preserve the full frame angle of view, or (more likely) 2) if you are recording 4K video that has a crop factor and want to preserve the wider angle of view with a shallower depth of field.
been using a viltrox ef to ef-m speed booster on M6 and it works great. this to rf version maybe just a mount variant.
Probably very similar.
I appreciate and respect your opinions and expertice Dustin. I have preordered the R7 and I'll be using it with the rf100-400mm lens. What could I expect from using this speed booster with that combo? A drop in aperture at 400mm to 6.3 or 7.1? Just wondering if it might be a good addition to my kit shooting birds and wildlife. Thanks for any info and best of luck to you!
It should be to F5.6
It won't work with the RF lens. Designed for EF lens to mount on R mount.
Fun fact: sigma art 40/85/105/135 and proably some more, have a huge circle of light, meaning you can cover full frame with 0.71x, making most of the lenses a real representation of f/1 and focal length reduced by 0.71x. Sigma 105/1.4 will work like 75mm f/1 full frame lens.
I’ve hard that before for those that have used them on Fuji medium format.
i want a booster for my r7, got sigma 18 35 1.8 art, this could be amazing for it i think. Already looks nice on my 5d mk3 at over 28mm focal.
I'm not sure if the speed booster itself won't introduce some vignetting, but worth a try
Hi Dustin, if I use this on EoS R with 50mm 1.8 will it become 50mm 1.4? Sorry if it’s a silly question. I am using only for stills please
It’s a little more complicated than that. You would have to use it in APS-C mode, so its hardly worth doing for stills. For video, though, you would get more the natural angle of view of a 50mm lens instead of the heavy crop.
Appreciate these
You’re welcome
The R7 is where this will come into its own.
Exactly. It didn't exist at the time of this review, but definitely makes more sens now.
Dustin, Brother can you can clear up if this work with the Canon EF-S 10-18mm?
Yes it will.
@@DustinAbbottTWI Thanks a Million Dustin.
Keep up the Awesome Content Brother, truly valuable insight.
I see where Viltrox has a Speed Booster Mark II. Does anyone know what was changed in the Mark II ? They appear to be marked the same on the barrel.
I totally agree on the screen points.
This was made for the C70 which has been around a while. Now the r10 and r7
It definitely makes sense on those new cameras.
@@DustinAbbottTWI unfortunately no longer available
I have the r7
Would you recommend fir this camera?
Definitely. It would allow you to use full frame lenses with their natural perspective and depth of field.
Can this work with any cine zoom lens?
Why can't these be purchased anywhere???
Because Canon has systematically shut down everything but their own products on full frame RF.
C70 is the real reason for this.
That’s probably true, but not an application I could personally test
Would it make the R7 and R10 full frame?
That's not really what happens, but it does make a lot of sense on those new platforms, to be sure.
Like Viltrox, TTArtisan, third party lenses give good performance.
There are a few that impress, for sure.
This will be deadly for wildlife when the R7 comes out.
Could be interesting - particularly the idea of possibly getting more light and thus being able to keep the ISO down a bit.
@@DustinAbbottTWI it would make my 300mm f2.8 a deadly combo for moose and bears, particularly if it has the rumored BSI sensor and IBIS.
With R7 R10 coming now... This adapter shows its worth
Agreed.
I tried speedboosters with my m50, even a viltrox one and they are pretty bad at image quality, although with some prime lenses they are acceptable
That hasn’t been my experience with this one on the R5, obviously
Excellent review Dustin. Happy New Year and stay safe !
Thank you very much.
Use it on an effing APS-C camera !!!!!
Use that speed booster on a FF camera is absurd.
Perhaps, but at the time there were no RF mount APS-C cameras (that has changed since this review).
Sorry but you will not get anything to play compared to using the lens natively. What you gain with the booster you will lose by cropping. There is no free lunch. The lens produces what it produces.
There’s some truth to that, but what the speed booster does is give you some flexibility on how you can use the lens.
Don't buy viltrox products if you using canon as if any issue will come up with your camera canon service centre people will just dismiss it saying it's because of third party product forcing you to buy canon one
This adaptor makes no sense UNLESS you absolutely need to shoot apsc (in video mode or future crop sensor rf body)
Let’s be clear, a 35 mm f/1.4 adapted on a crop sensor makes a 24 mm f/1 on APSC, which is obviously equivalent to that 35 mm f/1.4.
You DO NOT get the f/1 advantages on light gathering, DOF or bokeh. People should NOT buy this unless shooting cropped has an advantage, such as better 4K or on (future) cropped sensors.
I also want to thank you, Dustin, for your channel! It’s definitely one of my favorite photography channel! Congrats and thank you!! 😉
The most important application at the moment will be on cameras like the EOS R that have a big crop factor for 4K. This will allow people to get the proper angle of view. It will also be useful on future RF mount APS-C cameras.
@@DustinAbbottTWI I totally agree! Thanks again for your channel! It’s great!
This is no longer available. Canon just plain greedy.