Haoge LMR-OM415 Lens Collar Replacement Foot Tripod Mount Ring for Olympus M.ZUIKO Digital ED 40-150mm F2.8 PRO,90mm F3.5 Macro is PRO Lens Built-in Arca Swiss Type Quick Release Plate

I bought this foot specifically for the Arca-Swiss grooves and for the possibility that the foot/plate could be removed and reversed. Haoge implied that it could and I'm happy to report that it is easy to do and remounts solidly in the reverse direction. Having it in "reverse" enables me to mount the lens+TC+camera body in balance on my Wimberley Mono Gimbal. It brings the CG of the lens right over the foot, which you can't do with the original Olympus tripod foot. Just try sitting the lens+body combo on the Olympus tripod foot on a flat surface. It'll tip backward. With this easy mod, the rig will sit level, which means the CG is over the foot. You need only a 3 mm Allen wrench. Easy peasy.Update: Some reviewers complained that the collar does not clamp tightly enough to keep the lens from rotating. I found that to be true. The clamping screw comes to a stop, but the lens can still rotate. But, I found out why and solved the problem. See the first photo and read the following:I was using the collar with my 40-150 Pro today and found to my dismay that when I tightened the knob on the collar, it wouldn't stay in position. It could still revolve. Some reviewers had mentioned this on Amazon, but I hadn't noticed it. I took the collar off and examined it closely. In the gap in the collar where the thumbscrew clamps I could see that there was a washer that kept the clamp from closing all the way. I unscrewed the thumbscrew as much as I could to expand the gap, and could see that there was a C-clip on the screw that got in the way. I was able to slip a small screwdriver into the gap and pop the C-clip off (careful, it'll fly, so watch out where it goes). After I removed the C-clip, the clamp will now close all the way and the collar clamps down tightly on the lens. But, without the C-clip, the thumbscrew could fall out if loosened all the way, so you'll have to keep an eye on it.Another update: my friend pointed out that if the foot is reversed, it will interfere with the body of the Olympus EM1X. He's right, the protruding grips of the X don't allow the reversed foot to rotate freely. Although it won't balance as well on the Mono-gimbal, I put the foot back in its original position facing forward. The good thing is that it's easy to put it in the position that works best for you. :-)

I am using this Haoge collar and foot on an OM 90 mm Pro macro ASIN B0BT287LP6. The fit is fine. The unit seems well made with a plastic internal "slide bearing" on the inside of the collar so as not to damage the lens cosmetics. The collar tightening knob is made of plastic and not engraved; I suspect that the plastic will fracture and fail with time. Note that on heavy lenses for which I replace the feet (such as the OM 150-600 ASIN B0CS4F5YZP using a Wimberley AP-608 ASIN B0741CMPRB), I personally would not trust a low cost replacement such as this one. However. the OM 90mm macro is much less weight and much less torque than the OM 150-600 and thus this Haoge should be satisfactory. If there is a failure with use, I will attempt to revise this review.

I purchased this lens collar for my OM 90mm Macro. It fits perfectly and gets the job done. It's lightweight and well made. Money well spent.

I recently bought a used Olympus 40-150mm f/2.8 lens. I used the Olympus lens collar that came with the lens and I was unhappy with it. With the Olympus lens collar, it did not have an Arca Swiss compatible groove, and I needed to attach an Arca Swiss compatible quick release plate to the lens collar, and the QR plate kept slipping.I bought the Haoge LMR-OM415 to replace my lens collar, and it works great. The Haoge collar has Arca Swiss compatible grooves in it mounts the lens securely. It is also nice that the Haoge lens collar is less tall than the Olympus collar, which helps when packing lenses into full camera bags.

Doesn't fit my 40-150pro lens. I don't know if I was sent the wrong product but I even took the screw completely out to try open it wider but it's too small. Dont want to damage my lens forcing it on. Highly disappointed

As other reviewers have experienced, my collar fit well on my lens. I'm using this on OM 90mm F3.5 macro. That lens has enough magnification and focuses close enough that, unlike my Oly 60mm F2.8 macro, a tripod is really needed for most of what I shoot. I WISH OM systems would have included one ... but I'm seeing that pattern a lot with this new OM thing.So this collar fits a definite need. It fit well to the lens, and seems very high quality. I would HIGHLY recommend this collar if you want to use the 90mm macro to it's full potential. The price, I thought, was good.It fit well to my lens - snug, but not too tight. It holds firmly and the tightening knob feels smooth, suggesting the threads are cut well. It moves smoothly into and locks well into my tripods - the arca plate is well within standard tolerances. I like the size of the foot - allows me a bit of adjustment on the tripod if I need it and feels like I've got "room" ... I'm not gripping right at either end of it.I did notice, as other reviewers have, that it is not as smooth as could be desired when rotating the lens in the collar. There is a slightly gritty feel that isn't present with Olympus collars on my other lenses. In closely inspecting the inside of this collar, there are no burs or other flaws. However the finish (ie "paint") is a bit textured vs my other collars. Not much, but a bit. Soooo.... I took some 1200grit sandpaper and wet-sanded the inside of the collar. I then ran some polishing compound on this with a rag, by hand. I did break out a dremel tool and buffing pad - just a bit by hand. I then rubbed some wax on it, leaving a veeeery light coat. That helped a lot. However, there was still a bit of "scratch" to my feel - slight, but there. It did not leave any mark at all on the lens, so NOT a real problem, just not 100% smooth. I took a fine diamond stone and slightly chamfered the edges where the collar is split, where the tightening knob is, and then sanded and polished those edges a tad. That did the trick. It now goes on smooth and the lens rotates very smoothly without any grit/grinding but still locks down firmly.I do NOT think there was any problem with my collar. And I'd even say that the finish was 95% perfect. I'm just picky, I just wanted that last 5%. After the above work, I'd say it's 99% of what the Oly collars I have on another lens do. I'm very happy that it only took some minor work to make this into a "as good as Oly" collar, so this is NOT a knock against this product.If you want a perfectly smooth collar and are NOT willing to do a little work, maybe skip this and shell out the $$$ for an OM or used Oly collar somewhere. If you are willing to do a little simple manual work, save $ for the effort, and end up with a solid collar, I highly recommend this collar without reservation.