Breakthrough Photography announces the all-new EF to RF filter adapter

Fast351

EOS R6
Sep 12, 2014
47
62
Minnesota
www.fast351.com
As has been stated many times previously, the electrical contacts of the EF-RF adapters are straight pass through. There are no electrical components involved. Autofocus performance will be the same as with the Canon adapters.
On my R6 the adapter shows a firmware version, so I kind of doubt it's just a passthrough. Although mine is a control ring version so maybe that's the difference.
 

addola

Sold my soul for a flippy screen
Nov 16, 2015
129
112
If Breakthrough Photography can work with the RF autofocus, then I don't what's holding back Sigma & Tamron from releasing RF-mount lenses. Samyang/Rokinon already have two RF-mount AF lenses.

Anyways, I doubt the AF would be as good as the Canon adapter.
 

bbasiaga

Canon Shooter
Nov 15, 2011
371
363
USA
Do these filters fit Canon’s drop-in adapter?
I believe they should. The filters themselves were announced a few weeks ago. It was posted here and they were to fit the canon adapter at that time. Now they make their own adapter too.

-Brian
 

PhotoGenerous

R5 + GAS
CR Pro
Apr 11, 2017
40
59
Two reasons two buy this, or at least two features it has that the Canon one doesn't, is the tripod mount and the price.

With how light the RF cameras are, it probably makes a lot of sense to have the tripod mount a little further up than at the body itself to help with balance.

The 10-24 and the wider Tilt-shift lenses in particular are pretty heavy, and they didn't come with a tripod collar like the telephoto zooms do.
 

Shellbo6901

EOS M50
Jan 16, 2015
38
8
I wish the outside could be flush with the adapter, the photos of the canon seem to be pretty good. Vs breakthrough
 

Mt Spokane Photography

I post too Much on Here!!
CR Pro
Mar 25, 2011
16,450
1,431
If Breakthrough Photography can work with the RF autofocus, then I don't what's holding back Sigma & Tamron from releasing RF-mount lenses. Samyang/Rokinon already have two RF-mount AF lenses.

Anyways, I doubt the AF would be as good as the Canon adapter.
The adaptor just passes the signal from the lens thru, it does not autofocus a lens,

That's a huge difference from building a lens that has to interact with a R camera and autofocus using the proprietary and likely patented signals. If RF signaling needs a encryption decoder , laws make it illegal to break the encrypted code. It seems unlikely that its encrypted because we'd be seeing lots of lawsuits. We know that EF works when passed to the appropriate contacts. There is something on or in the lens electronics that puts the Camera in RF signaling mode.

We saw a couple of patents for that 3 years ago, it seemed pretty simple like a signal line from the lens going high or a switch on the camera body.
 
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CvH

EOS 90D
CR Pro
Nov 19, 2014
181
76
Glass is changing the focusing distance (especially for wide-angle lenses). Clear glass is used to change it for the same amount as the actual filter would.
That doesn’t explain why the basic and control ring adapters don’t have the glass.
 

BeenThere

EOS R
CR Pro
Sep 4, 2012
1,217
642
Eastern Shore
That doesn’t explain why the basic and control ring adapters don’t have the glass.
Those two adapters are not designed to take a glass filter, so only air is in the light path. Once glass is in the light path, it has a different refraction index from air, and changes the back focus distance. So the adapter overall lengths are slightly different.
 

snappy604

EOS RP
CR Pro
Jan 25, 2017
439
301
If Breakthrough Photography can work with the RF autofocus, then I don't what's holding back Sigma & Tamron from releasing RF-mount lenses. Samyang/Rokinon already have two RF-mount AF lenses.

Anyways, I doubt the AF would be as good as the Canon adapter.
passing the signal along is pretty straight forward, how to program the signals to do what you want is a whole lot more complex, especially if you have to reverse engineer the code, its a lot of guesswork.
 

weixing

EOS RP
Jul 20, 2010
618
19
That doesn’t explain why the basic and control ring adapters don’t have the glass.
I create a simple diagram to illustrate this. The drop-in filter adapter is actually longer than the non-drop in filter adapter (basic and control ring adapters) to compensate the change of back focus due to the drop-in filter. If you use a drop-in filter without any filter, you might not be able to focus to certain distance... same reason why when you put an extension tube, you can't focus to infinity.
 

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Atlasman

I'm New Here
CR Pro
May 14, 2020
20
21
I believe they should. The filters themselves were announced a few weeks ago. It was posted here and they were to fit the canon adapter at that time. Now they make their own adapter too.

-Brian
Thanks Brian. Joseph
 

CvH

EOS 90D
CR Pro
Nov 19, 2014
181
76
I create a simple diagram to illustrate this. The drop-in filter adapter is actually longer than the non-drop in filter adapter (basic and control ring adapters) to compensate the change of back focus due to the drop-in filter. If you use a drop-in filter without any filter, you might not be able to focus to certain distance... same reason why when you put an extension tube, you can't focus to infinity.
Thanks! I thought all the ef-rf adapters are same length.
 

snappy604

EOS RP
CR Pro
Jan 25, 2017
439
301
interesting, youtubing suggested a review of ND filters, including Breakthrough and it caught my eye. While it didn't include the drop in adapter filters, it did show the differences between their X2 and X4 line (their website could use some improvements) and looks like their X4 line is pretty serious and good... which they also produce for the adapter.. so that's pretty good, but also pretty expensive ..

anyways neat video if any are interested
 

Robbie_B

CR Pro
Apr 11, 2020
6
5
I was looking for a Canon control ring adapter but they are rarer than hens teeth at the moment. However the Amazon man has just delivered a Viltrox EF-R2 control ring adapter and after an hours playing with it, all appears to be fine set to ISO for now. At £89 from Amazon UK and probably cheaper on eBay definitely worth a punt for the amateur user.
 

melgross

EOS RP
Nov 2, 2016
626
411
So...I'm assuming the clear filter is to close up the adapter for weather/dust sealing when you don't need a polarizing or ND filter. Is there any other use for it? Why do they use clear glass instead of just an empty frame? Or is the glass in the filter part of the weather sealing?

The standard and control ring adapters don't have glass, though, so...what's the deal?

I'd be tempted to remove the glass from the clear filter so I don't have anything that could reduce image quality from the lens...
The glass has likely been computed as part of the lens optics, at least on the part of Canon. Thickness, type of glass, coating, etc.
 

melgross

EOS RP
Nov 2, 2016
626
411
A question that always has to be asked about third party adapters, because it has been a problem, is build quality and quality control. Digiloyd has done testing and found that a number of third party adapters for various bodies and lenses are not parallel across the sensor, and some are off in length. It only has to be by a tiny extent to cause a oroblem with today’s high rez sensors. I’d trust Canon’s, but not sure about these.
 

melgross

EOS RP
Nov 2, 2016
626
411
Two reasons two buy this, or at least two features it has that the Canon one doesn't, is the tripod mount and the price.

With how light the RF cameras are, it probably makes a lot of sense to have the tripod mount a little further up than at the body itself to help with balance.

The 10-24 and the wider Tilt-shift lenses in particular are pretty heavy, and they didn't come with a tripod collar like the telephoto zooms do.
The tripod adapter could be useful with lenses that don’t have one. But I wish people would stop think8ng about bodice for everything. Canon’s are not expensive. Until we see some useful, critical testing on these, I’d tend to be wary. Cheap is often telling us something about that.