EOS 5D Mark II lens adapter for non-EF lenses

[carliesw98]

Hello! 
I have a eos 5D mark ii and was wondering if there is a lens adapter to make it so I can use other lenses? Or can I only use EF lenses? 

[kvbarkley]

I am not sure what "other lenses" you are talking about but the EF lens lineup is one of the best in the world, You can choose from Canon, or there are a lot of third party options, too.

[AtticusLake]

The EF lens mount (which your camera uses) has a flange distance of 44 mm.  This is pretty long, and doesn't leave much room for an adapter from most other lens mounts.  There are exceptions; for example, you could get an adapter to use PL lenses on your camera.  These are generally big, heavy, all-manual cinema lenses, so not likely what you want.

Mirrorless lenses, like RF, RF-S, EF-M, Nikon Z, Sony E and FE, Micro Four Thirds, etc., can not work.  Generally you're safest sticking with EF lenses.

If you want to know more about lens compatibility, I wrote an article about that: https://moonblink.info/MudLake/gear/lenses

[ovdmse]

You can use adapters for EF-1,2,3 bayonets, but everywhere it will be manual optics.:
1) M42 - a huge amount of inexpensive manual optics (easy to find).
2) Pentacon Six - medium format lenses (easy enough to find)
3) Early Hasselblad mount - - medium format lenses (hard to find)

[ovdmse]

If we talk about automatic focus, then the Sigma Art fix line is worthy of attention. The rest is very far behind Canon on EF (tamrons, sigma).

[justadude]

If you go to B&H and search Lens Adaptors for EF you will find 167 different adaptor plates.  I use a handful of these for different lenses and they work well.  I mostly use my Pentax film lenses, or my older M42 lenses, but you can find adaptors to use Nikon F lenses, Sony A lenses, Olympus, Contax Zeiss, and many others.  While some of the third party lenses are fair to use, others are very unique and give a different look than you can get from Canon EF lenses.  The Helios 44M lenses being a perfect example.

The only thing you won't find are adaptors to use mirrorless lenses on a DSLR.  That's impossible to do.