I was looking for a very snug portable case so I could put the 28mm pancake lens on my Fuji X-E1 and just toss it into my purse. Effectively turning it into a very very good ultra-portable. This fit the bill perfectly and I imagine it would work for most small mirrorless cameras and while I am using a pancake, there's definitely room for a lense up to a few inches in size.

Best phone mount I have used, would recommend to anyone

Best car mount out there! not that i've tried many others, but I have used one that hooks up to the vent which isn't very sturdy and requires two hands every time you want to put your phone on it, to make sure it doesn't pop off of the vent. The steely car mount is so easy and very small. I don't like the look of those big bulky ones. My fiancé and I both have these in our cars, and just recently bought them for our mothers, who also love them!

Im using it on my Nikon 28mm f/1.8 and Nikon 85mm f/1.8. Same diameter on both lenses.

Amazing for the price ! Packaging is decent ! I used this for a Sony 28mm f2.8

Best Canon Lens, I think, it all depends on what your shooting.

I bought this filter for my Tamron 17-28mm e-mount lens and love it. I haven't noticed any major color distortion and the sharpness doesn't seem to be affected at all either. The low profile seems to negate most vignetting you may encounter, but it does show up (unsurprisingly) if you stack this with another filter like a CPL. The gold ring is a nice touch too. I would absolutely buy these again as you get great results for the money.

When I purchased this lens for my Canon Rebel xsi, I knew it would give me a cropped image equivalent to 27-64mm. I already have a 28-70 lens, that becomes about 44-115 on my Rebel. I wanted to get back the 28mm (semi-wide) view but did not want a lens that would not work on a full-frame camera as I expect to upgrade at some point. So I opted for this lens. What I didn't realize, or had forgotten, was that this lens has a close focus of 11 inches. Which means that even though on the wide end it is equivalent to 28mm, it still is capable of producing an image with a much wider perspective than a standard 28mm on a full-frame. The distortion of angles at the 17mm setting with objects up close is still significant enough to get some really unique shots. F/4 doesn't cause me any problems because when I'm indoors I just set ISO to automatic and it really doesn't impact my shooting at all. Outdoors, who needs f/2.8 with a wide angle anyway.I haven't seen any reviews that have mentioned how the close focus ability impacts the perception of wide angle. Anyway, I'm very pleased with the purchase. Only thing that could be better would be an all-metal body on the lens. It feels a bit less luxurious due to the plastic barrel.Just my 2 cents. **Also** Sounds crazy...but true...somehow my copy of this lens is close-focusing at 5 or 6 inches rather than 11. Not sure if this is normal on an APS-C camera or not, but I'm a little mystified as to how this is happening!