Don't be confused by what this adapter does and doesn't do. Many reviews and answered questions are misleading. Just to be absolutely clear, this adapter works with the Panasonic Lumix G7 body and Canon EF lenses, NOT Canon EF-s lenses. If your lenses have the RED dot, them this adapter will work for you. If they have the WHITE dot, then you will not be able to focus the lens when mounted and should not bother with it.K&F has a good product here. The ir build quality is very good and the adapter fits very snug on the camera and Canon lenses. K&F's description of the product is also accurate... it's for EF lenses. Just be advised that this is a mechanical adapter... it has NO electronics and your Lumix G7 will not be able to auto-focus an EF lens nor will it be able to adjust the aperture. Once an EF lens is mounted, you are on your own in the camera's manual mode only.Once you mount a lens on the G7, you will need to go into C mode (custom) on the settings dial and toggle down to turn ON the setting that allows the camera to operate without a lens. That will allow the shutter to operate. Unfortunately, the adapter does not come with instructions so this isn't obvious.Sadly, my EF-S lenses are the smaller ones that I wanted to use with the G7 and that is why I bought the adapter. Shame on me for not realizing that they are not what it was made for. Don't make the same mistake.
Well machined and made. It's a simple pass through adapter so don't look for "speedbooster" functionality. It won't work with any of my Canon STM lenses (no communication so no focus) but if you have a manual lens, this will do the trick. The only manual lens I have that won't focus to infinity is the Tokina 11-16 so just be aware if you are thinking about this adapter for that lens. It will focus closer than infinity but not to infinity. Works great for my Canon L lenses though. No brainer for a quick and dirty adapter.
Quality build. Works great with most of my Canon lenses, except the nifty fifty, which only works in a quasi-lens whacking mode. Something about the alignment on the lens doesn't permit the focus ring to have an effect when attached to my G7. I've seen other reviews that say it works with their 50mm, others say it doesn't; I'm one of the unlucky ones. Still, well worth the price - it's quick to attach, solid, and feels like it will last a long time.EDIT 3/31/18: After toying around a bit, I've found a way to get this to work with my Canon 50mm. It involves attaching the lens to my T3i, obtaining focus, and then reattaching the lens to my G7. Sometimes the focus ring works, sometimes not, but after attaching the 50mm it will be in focus, though only at the exact focal distance (100mm for me due to 2x crop factor). I like this product enough that I ordered a few older Canon EF lenses, so I'm still a happy customer.
I bought this to mate my Olympus OMD EM1 (Mark1) with my Canon EFS 55-250 and EFS 10-22 lenses. Works well. Gives me a 500mm equivalent on my Micro43 camera (when using the 55-250mm lens). Great $20 investment!