Fotodiox Pro Fusion Adapter, Smart AF Adapter - Compatible with Canon EOS (EF/EF-S) D/SLR Lenses to Select L-Mount Alliance Mirrorless Cameras with Full Automated Functions

Using this to adapt EF lenses to a Lumix S5.Doing so prevents you from using constant AF, but you should know this by reading the description.I was able to purchase a Used - Like New Canon EF 16-35 F2.8 for less than $1K, far less than the Lumix Lens at F4, which has been working great for me. Also grabbed a 50mm Canon lens.AF seems to sort things out plenty fast for me, but I only do real estate and landscape photography.When filming, I use a Ronin with focus wheel, so that's how I work around that issue.All in all, this feels very well made, is small and lightweight, and pretty much disappears behind the large canon lens. Even when the 50mm is linked up, it's very compact and easy to carry around. I should really get a 24mm prime for this, now that I think about it.Highly recommended. Having at least single AF is worth the price.

The media could not be loaded.  If you plan to purchase this adapter, consider the Sigma MC-21 again. I bought this item from a recommendation because it has a better fit (which it does), and everything seemed to be working fine for a while (I have the Panasonic S1H). Then all of the sudden, it started having issues with my Zeiss 50mm lens. The aperture does not work properly. Please see video. It will get stuck around f/4 then start moving in reverse and jump around in a strange random motion. Then it is not accurate. So the camera will say f/16 and it is really at f/4. This is not good. I reached out to amazon and was like 4 or 5 days past my 30 day return window, and they said I had to go through the company. I reached out to Fotodiox and they did send me another to try for free, but that one didn’t work either. I asked if a refund was possible and they stated I would have to get that through Amazon. Now I'm stuck with this piece of crap and will need to sell on my own. I will be buying the Sigma MC-21 and hopefully can get some of my money back from this adapter. This has been a huge headache and really I wish Fotodiox did more to help me. I would not recommend this product, especially if you have Zeiss glass. If you do buy this, make sure you heavily test with all of your glass. I don't typically write poor reviews, but this one rubbed me the wrong way.

My Panasonic shows the aperture listed for an electronic only EF lens, but it does not actually change it. I can change the aperture from the lowest or the max the lens supports (which is correctly identified) it doesn't actually change the aperture, it appears to be stuck fully open. Going to refund.

Le coffret bois présentait des sotchs de garantie coupés et le sachet d'emballage était froissé. Tout laisse à croire que la bague à déjà été utilisée, donc produit reconditionné.Quand au fonctionnement il est décevant. Mise au point hésitante et pompages fréquents. Parfois la mise au point ne se fait pas.Dommage. J'avais privilégiée cette bague au lieu de la Sigma, mais je regrette mon choix.Le firmware de cette bague peut être mis à jour par une prise USB, mais on ne trouve aucune indication sur la procédure de mise à jour. Quand à savoir la dernière version du firmware : mystère ?Sur la bague il existe un bouton Fn, mais quand l'utiliser ?Donc le bilan n'est pas favorable.