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

Fits and functions perfect.

I received a pair of these today and was prepared to find they did not fully tighten as a number of reviewers mentioned. Both of mine tightened well, apparently this company saw the reviews and fixed the issue.One thing that very pleasantly surprised me is that this is a bit lower profile than the Olympus foot, which makes it even nicer when you do not have to add an Arca-Swiss plate as well.Build seems to be very solid, fit and finish are very good as well.

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.

Well made, good price

Works, but feels rough. I returned it.

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 was excited to read the recent reviews that the issue with collar tightness had been resolved, so I gave it a try. The collar would barely fit onto the lens when it was aligned properly with the pins (scraping noises made me very nervous), and once it was placed on the lens it would not rotate at all. So, it's basically useless. I did some measuring with a set of digital calipers and the front-facing metal edge inside the collar is thicker than the OEM collar, so the pins don't clear the front edge far enough to make it into the rotation channel. I had no choice but to return it. Seems to be some quality control issues.

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.