I don't no what some of you are talking about saying it dose not work with sigma. It dose work with both of my Sigma 70-200mm sport and 150-600mm Sports but the Auto Focus dose not work with I don't mind and it dose not fall off. I love it and it works really well. I just got it.

There’s something simply divine about the 35mm focal length — and this lens remains the only native option for the RF mount. I’m coming from an EF Sigma 35mm F1.4 to this lens. I do miss the slightly wider aperture of the Sigma — and the additional blur it creates. But at the end of the day, this lens is pretty much just as sharp and so much smaller than the Sigma, especially once you factor in the adapter. Not-quite-macro close focusing is another major perk, and is quite useful for small animal photography. Overall, a tremendous bang for buck.

The way I use this filter is by combining it with a fast lens like the sigma 18-35mm f1.8 art. I use this filter in combination with the fast apertures to blur out the backgrounds in broad daylight without letting too much light into the picture. If I want to make it lighter or darker all I have to do is turn a ring at the edge of the filter.The only thing that gets me is when I turn it too much and it ends up unscrewing the whole filter out of the threading a little bit. But that's not a bad thing, its just a part of the experience.I bought it 8 months ago. This has been, thus far, an excellent purchase.

Fits my Pentax DSLR. It’s lightweight, and works well.

I've used this with my 35mm f/1.4 E-Mount . By far, this polarizer has not came off my lens when i took it out for travelling to Hawaii. It gave my shots more contrast, darkens the highlights to the point where I can use the image and of course, see through reflections. As a polarizer, it does what most polarizers do, I definitely would recommend this filter!Highlights:- Tiffen helps with maintaining the sharpness- Blocks reflections- Ups the contrasts in your shots and reduces highlights

I ordered the 52mm filter because the 30mm f1.4 sigma lens for sony e-mount cameras has a 52mm thread but after lens arrived, I couldn't fit it on.But after-service support was pretty helpful in telling me this

I bought this to go along with my 24mm stm pancake, 18-135mm kit lens and my sigma 18-35mm art lens. For $125 you really can't go wrong. The stm focus is loud especially compared to the kit lens which is basically silent. I paired it up with a JJC LH-68 hood and the whole package is light and small. Not sure if I need the 24mm pancake now.

I debated for some time between this and the Sigma Art series 35mm. The color and saturation are stunning with this lens-- it's on my camera now >90% of the time (with 24-70L and 135L as other options). It's fantastic for indoor low-light photos. I have no regrets about this purchase.