[8.55 x 4.9 x 1"] It is a snap to install and fits perfectly.

[8.55 x 4.9 x 1"] I use this with the Canon EF 400mm F4 DO and it is really an essential accessory for the lens. The Canon one is bulky, heavy, and is a pain to get on and off. This one is lighter, quick to get on and off, and can be put on the lens when in storage with the hood in reverse, hood on normally, or even just over the front of the lense without the hood. It stays one and does what it should. The little loop on it is also useful for attaching a cord to something like your tripod ring so you don't lose it or let it fall on the ground. This is also the most economical and reasonably priced product in the entire LensCoat line of products in my opinion. At sub $30, there should be no hesitation in purchasing this to protect your lens.

[8.55 x 4.9 x 1"] The Sony FE 2.0x Teleconverter works perfectly with my 70-200mm f/2.8 GM Lens. The teleconverter provides the extra reach that I need while maintaining excellent image quality. I look forward to creating many gorgeous photographs with this combination of lens and teleconverter! 3

[0.06 lb] Very small and sweet. Comes in an awesome, cute little case. Works perfectly, and looks nice. I use it on my 200-600mm lens and now my zoom is insanely good. Highly recommend

[8.55 x 4.9 x 1"] I purchased this for my 70-200mm f2.8 for a football game that I had field access and for which I was not sure what the weather was going to be during the game. I wanted some general protection and this was it. It comes in 3 small sections that you slide over your lens & lens hood. They all fit very snug and there was no worry that it would move or fall off at any time. As it turned out, the game night weather was clear, but very cold. I had this lens on a 2nd body with a Black Rapid strap. It was great to pull up the 2nd camera/lens and not feel the cold metal of the 70-200mm barrell. The cover does not impact your access to the focus or zoom ring. I am not sure how the cover would do in more severe weather but I like that it does give basic protection from keeping it on sling hanging from my side.

[8.55 x 4.9 x 1"] Got 2x to use with Sony FE 200-600mm f/5.6-6.3 G OSS E and my A7iii. Absolutely amazing! Great for animals, moon, and etc.very pleased with redults.

[0.06 lb] If you accept that these aren't for making really far away things closer, but rather making reasonably close things frame filling, then its a fantastic bit of kit. If it's too far to get a clean shot of with the 600mm straight out, this won't magically make that possible. Atmospheric interference, stray light, micro tremors... yeah, turning your rig into a telescope with a camera on it isn't optimal for long long distance. But if you're in that good range for the 600 and just want the subject bigger? Insanely good. Negligible IQ loss which is more than compensated for by the reduction, if not elimination, of cropping.

On the 100-400, it is just pure magic all around. Yes, it makes it an f11, but... you have an 800 mil lens in a shockingly compact form.

Just keep expectations where they should be and this won't disappoint.

[8.55 x 4.9 x 1"] I tested it with Sony a9 II on a Sony 100-400 F 4.5-5.6 lens. It makes it F11.0 Tested it mostly on Bird In Flight and also static Birds with small movement. Focus acquisition is good against flying bird against blue sky. Did not have a chance to try it against water or green foliage. Sharpness and detail are very good with the aforementioned combo.
I also tried it on a Sony 200-600 lens. It makes it to be F13.0 which puts it into diffraction zone. It works but I won't recommend using it on that lens much. I also tried it with a Sony a7R IV camera.
On the 200-600 lens the Sony a7R IV hunts at continuous focus but works with the Sony 100-400 lens. I will use it with the Sony a9 II camera and Sony 100-400 lens 99 percent of the time.

[0.06 lb] This cover perfectly fit my sony 70-200mm 2.8 g lens.I think it will prevent the lens from scratches ,dent etc to the outer painted surfaces.The zoom & focus ring are not covered.

[8.55 x 4.9 x 1"] When you pay $12,000 for a lens, you want to do all you can to protect it. LensCoat lens covers are the real deal. This is the third super telephoto lens I have covered with a LensCoat cover. All the pieces were cut to fit and the assembly process was quick and painless. Everything fit as it was intended. When you use a lens that is almost two feet long, it tends to get bumped from time to time. The LensCoat cover does an excellent job of protecting the lens from scratches and dings. I recently sold a lens that had been protected with a LensCoat cover. When the cover was removed, the lens looked like it did the day it was purchased. Besides protection, the LensCoat cover provides camouflage and a warm touch on cold days. I would not use a long telephoto without it.