JJC(2-Pack) Eyepiece/Eyecup/Eye Cup Viewfinder for Canon EOS 5D Mark III/5D Mark IV/5DS R/5DS/7D/7D Mark II/1D X/1Ds Mark III/1D Mark IV/1D Mark III Camera, Replaces Canon EG Eyepiece

The clips/hooks which hold the eyecup onto the eyepiece of the camera - the ones you release by pressing the sides of the original Canon item - are just tiny bumps which don't fulfil the purpose, so the eyecup has fallen off my 5D4 several times. The fit is similarly bad on my 7D2. Also the rubber rim comes away from the plastic too easily on one side. Not fit for purpose - one star.

I bought these as the used Canon EOS 1-DX mkii I bought was missing the eyecup. I already owned a Canon EOS 7d mkii which uses the same eyecup so I thought it would be useful to have a spare which I could use on either camera. They arrived next day using Amazon Prime. The rubber on n the eyecup is pretty decent, as soft as the Canon original i would say. The shape and size of the eyecup is also identical. So far so good. The only problem, and it's a pretty big one, is that these eyecups do not click into lace like the original Canon item. When you fit an original Canon eyecup it clicks (and therefore locks) into place. This copy eyecup just slides on and isn't locked, so it can (and does!) easily slide off when you're putting your camera into a bag, or if it rubs against your clothing. It's fine when you're holding your camera up to your face when in use, but you need to be very careful when handling your camera, otherwise these eyecups have a tendency to come off.To summarise, they fit absolutely fine, they just don't lock into place, so can easily get knocked off and lost. Needless to say, I will be buying an original Canon eyecup very soon!

When doing extra long exposures you’re told to block the light coming in from the eyepiece So I am going to block one of these with a plastic cover so I can place this on the camera when doing long exposures

Unlike the Canon original, this eyecup does not have a latch and relies only on the tightness of the fit to stay on. This is OK with care, but when carrying the camera on a strap round the neck it takes only a small movement against a coat to knock it off and lose it.

Does not clip in like Canon eye cups so they keep coming off, avoid (this is when using with 1DX MKII)