top of page
  • Writer's pictureneil.condick

Not a lot of people know this...

Mirrorless cameras are definitely flavour of the month and it will only be a matter of time before this will be the only choice of cameras available. Canon, in particular, are dropping some of their more popular models like the 5D in favour of their R range of mirrorless cameras.

Along with this is their rather expensive RF range of lenses, although the reviews of these lenses are pretty exceptional.

However, to capture their current market they are offering an RF to EF adapter to try to encourage their followers to switch to their mirrorless range of cameras without the initial expense of buying a whole new set of lenses.

What they don’t tell you is that if you use a crop sensor lens, typically the EFS range, the adapter crops the image as the lens is normally incompatible with a full frame camera. This cropping has the effect of almost halving the cameras image size... For the Canon EOS RP this would give an image quality in line with a Canon 450D!!

Giving this limitation, it won’t be long before their followers will feel the need to upgrade their lenses. Quite a marketing ploy... 😔

43 views3 comments

Recent Posts

See All


Jan 21, 2022

Further to this blog I have just been enlightened with regards to Canons EF to RF adapter. I came across an article which clarifies the performance of the EF and EF-S lenses using the adapter.

If you fit an EF lens via the mount adapter onto an EOS R-series camera body, that lens will work exactly the same as it does on any full frame EOS camera. No quality is lost, nor is any functionality. There are, however, some features only found in the EOS R and RP models that will only operate if a compatible RF lens is fitted.

When using an EF-S lens on the EOS R and EOS RP then it also works in an identical way…


Apr 01, 2021

Thanks Neil .. will be interested in your hands on experience!



Mar 12, 2021

Interesting stuff Neil.

It's probably similar with Nikon. The Nikon mirrorless cameras are Z50/Z5/Z6/Z7/Z6II/Z7II. Of these the Z50 is crop sensor with all the others full frame. If you have crop sensor lenses in use with a Nikon crop sensor DSLR and buy the Z50 with the Nikon adapter the crop lenses work exactly as they would on the crop sensor DSLR.

But if you use the crop sensor lenses with the adapter on a Nikon full frame mirrorless you will get cropping because the lens is smaller than the full frame sensor. That is the same as if I use a crop sensor DSLR lens on a Nikon Full Frame DSLR.

I think the adapters are a good idea…

bottom of page