Question for the techies: EOS R with one of the adapters = full usage of APS C lenses like Sigma 50-100 1:1.8 ?

[axtstern]

Sure the 28-70 1:2.0 sounds nice but for the beginning I would like to go with the Sigma 1.8 Zooms I own.
Any chance of the EOS R and it's flange distance being the vehicle to make all my APS C lenses full frame capable?

 

[Kit.]

They won't be full frame capable, but you can extract more than the APS-C image from them if the quality of the corners (vignetting, softness) is not a concern to you.

 

[axtstern]

Uh... yes ... even worse. Found this:

https://www.dpreview.com/news/49858...=marquee&utm_campaign=traffic_source#_ednref1 When attaching an EF-S lens via any of Canon’s new R-series mount adapters, the new EOS R automatically switches to APS-C crop mode.

 

[Kit.]

I don't think it recognizes these lenses as "EF-S".

 

[Sharlin]

All third-party lenses for Canon APS-C are EF, not EF-S. They just have a smaller image circle. You can already mount any of them to any existing Canon full-frame camera, and the same should hold for the R (with the RF-EF adapter).

 

[jsmjr]

Uh... yes ... even worse. Found this:

When attaching an EF-S lens via any of Canon’s new R-series mount adapters, the new EOS R automatically switches to APS-C crop mode.

What's the source? And what does "crop mode" even mean? (I can guess... it might save an image file with the smaller dimensions. Does it also switch to a magnified view in the EVF?)

 

[Deleted member 378664]

What's the source? And what does "crop mode" even mean? (I can guess... it might save an image file with the smaller dimensions. Does it also switch to a magnified view in the EVF?)

Can't remember where I read it, but in Crop mode one has "only" 11,6 Mpixels left. Don't know, if the view in the EVF will be magnified. Could imagine Yes, but only with lenses that are recognized as EF-S.

 

[axtstern]

Found that line on the DPreview article which introduced the three adapters

 

[axtstern]

So I assume that the camera can identify the Canon EFS Lenses but will not detect the Sigma and Tamron APS C Designs