JJC Tripod Collar Mount Ring, Compatible with Canon EF 70-200mm f/4L /EF 70-200mm f/4L is/EF 70-200mm f/4L is II USM Lens, Replaces Tripod Ring A-2

I buy this for someone he really love it the quality and everything is great about it

The ring attaches easily and has a firm grip and does exactly what it is supposed to do. Worthwhile product was sent quickly and well packaged.

I was skeptical regarding tripod collar given the large difference between what I paid for the item and what Canon was asking for theirs. So I was then pleasantly surprised when the item arrived. The color was a great match. The collar firmly held the lens. It was indeed metal construction. My only complaint was the finish. It has small bubbles or dabs of extra paint that impair the overall quality of the item. The flaws are not so extreme such that the flaws are readily apparent. No one would likely notice the finish flaws when mounted on a camera and tripod. Yet even with the poor quality finish, I would buy this item again, particularly given the low price. The Canon price is just too hard to justify.

I bought this ring for my canon 70-200mm F4. The rings performs very well. It fits tight and secure. It is the best alternative to the original ring considering the price. The material is very sturdy and the color is basically identical to the lens. Unlike other reviews, this ring does not have any play and feel very secure. I use the ring to support the lens and my Xsi camera. I have done 3-5 minutes exposures, and I did not notice any movement or flexing of the camera at all.

I just took delivery of this tripod mount ring so I haven't used it in the field yet. It looks nicely made, it opens and closes easily and it's easy to put on the lens and take off. The color matches the lens perfectly. My problem is that when the ring is mounted to the tripod (a Gitzo 1325) with the lens in the ring and on the camera (a Canon 5D Mark II) it's easy to induce a little forward-backwards motion of the ring by gentle hand pressure. The motion isn't at the connection between the ring and the tripod, it's movement of the ring itself, apparently coming at the clamp used to open and close the ring. It isn't a lot, maybe a few millimeters, but it's definitely there and it isn't hard to create. This may be the same thing that Thomas Burnside noted in his review.The problem appears to exist because the ring clamp doesn't close quite tightly or firmly enough despite tightening it as much as I can by hand. Or maybe it's just the material used to make the ring as Thomas Burnside suggested in his review. But when when the ring and lens are mounted to the tripod everything should in my opinion be rock solid. I shouldn't be able to easily move the ring/lens back and forth by hand as I can. I don't have a Canon ring to compare so I don't know if the same movement exists with it or not. But if not then maybe that explains the huge price differential between this ring and the Canon ring.Despite this movement the camera and lens are still balanced over the tripod better than when there's no ring and the camera is attached to the tripod. So it may be that the movement described above will have no practical effect. But then again maybe it will.

Haven’t had a chance to actually use this yet, but I’m pretty sure I’m gonna enjoy it

I looked high and low to find a canon tripod ring replacement for my 70-200mm f/4. I hated spending a hundred bucks or more for a canon, and it was suggested to me that I buy a third party. I liked the idea. I found this and the description states it is metal, as well as several of the reviews. Upon receiving it I have found out that it is not metal, nor is it anywhere close to a quality product. The only good this is that it has an almost exact paint match to the canon white.The tripod socket is too shallow, barely letting my Manfrotto QR plate fully tighten; the plastic construction is wobbly (makes for a great solid mount huh?), the interior lining marred my lens after ONE turn while on a tripod, and the latch screw is difficult to operate.I will be trying the opteka, and hoping that it is higher quality, if not I will give up on third party tripod rings.Buyer beware! You get less than you pay for here...

This collar will hold the lens on a tripod head and allow you to carry it around attached. It did this fine for a few hours over a couple of city walks. Perhaps it would eventually let me down, but I will never know as this collar has been removed from the lens. I own the 70-200 2.8 I which has a metal collar. This Rainbowimagine collar is plastic and feels cheap. The screw knob feels as if it is going to snap off each time it is tightened or untightened. Not that big of a deal since it hasn't at this point. My biggest complaint and the reason I have now purchased the OEM Canon collar is due to the vibration that causes blurry pics. I use mirror lockup with a 2 second delay which has yielded some shake / blurry images. Also, when bracketing shots the images are never aligned. The 2.8 collar is solid and has never had the blur issue when bracketing or using the 2 second delay.I do not recommend this collar for landscape photography.