RF adaptor

[BryanShaw1]

I'm looking at purchasing an R6 with an adaptor so I can continue to use my existing lenses. I am told that the Canon adaptor is only good for EF lenses, but I see on Amazon that the Viltrox adaptor is good for both EF and EF-S lenses. Any information gratefully received.

[Waddizzle]

I believe the Canon adapter also works with EF-S lenses. I know R5 has crop modes, but I am not sure about the R6.

In any case, only use the Canon adapter. It seems to have a better physical fit than third party adapters, and it is guaranteed to work with all Canon gear.

[ebiggs1]

"In any case, only use the Canon adapter."

I, also, would strongly advise getting the Canon adapter.  It is always best to keep your Canon gear all Canon if possible.

[Tronhard]

Since you asked, I have the R6 and a Canon EF adapter.  I attached an EF-S 18-135 IS STM unit to the R6 via the adaptor, without any changes to the menu system and it worked ok, applying the crop function to reduce the FoV and image size accordingly.

Apologies if you know this already, but the APS-C will cause the camera to auto crop the image by a factor of 1.6, and also reduce the pixel count by a factor or about 2.56 (crop factor squared) from 20MP to around 7.7MP , so you are losing a lot of pixel density by using APS-C lenses - see p855 of the R6 manual. 

It is for that reason that I, and a lot of other long lens shooters who want the reduced FoV, would like to see a crop-sensor R7 with something like a 40MP sensor that would give a pixel density to the equivalent of cropping a 104MP sensor down to APS-C FoV.

[BryanShaw1]

Thanks for your reply. I am interested to know your circumstances for wanting to reduce the FoV.

[Tronhard]

I hope the attached link to an article I wrote will provide what you are looking for.  If you have any questions or queries please do respond.

My article on Focal Length, Crop Factor, Field of View and Pixel Density 

[ebiggs1]

Trevor, 

That's a fine article but I will take exception with. a "crop" sensor camera it does not crop anything. It only appears to crop if you intend on comparing it to a 35mm sized camera.  Most people today do not even think that and have to be told they have a crop sensor camera. All cameras give exactly what you see in the view finder or LCD.  They are all essentially full frame cameras.

I know some manufacturers tend to keep this falsification going, too. If you never intend on owning or using a FF camera, it is totally confusing and useless.  If you are an advanced or even just a hobbyists and have several bodies I suppose you can make a case for comparing equivalent focal lengths. However, IMHO, totally unnecessary which is born out by the fact guys that use medium or large format gear don't do it. Although they certainly could but would have to use an "enlargement" factor.

[BryanShaw1]

A very interesting article - thank you.

As I understand it, the FoV is determined by the FL (using equivalency or not).

If commited to a FF camera due to the other benefits of the R6, then the answer would be to use a longer lens or even a converter to negate the reduction in pixels. Also with a FF, a 2 x extender means 2x, rather than the 1.? something with a crop sensor.

[BryanShaw1]

What's a crop mode?

[ebiggs1]

"What's a crop mode?"

It is supposed to correct for the difference in AOV between a FF, or 35mm, camera and one with a smaller sensor.