67mm ND2~32 variable ND filter from K&F Concept you are asking, Front thread diameter (attach additional filter/other accessories) is 72mm, so if you need to attach lens cap, the size is 72mm, hope this helps. We care about our customers, any questions, you can ask us directly at gearfocus@kentfaith.com. All emails would be replied in 24 hours, no exception see less 

It should do, just check the OD of your lens it will have the thread size marked on it. 

It should do, just check the OD of your lens it will have the thread size marked on it. 

The size you require is usually stamped on the inside of the lens cap. 

The size you require is usually stamped on the inside of the lens cap. 

sure, 2 years warranty, any questions, pls just feel free to contact seller via gearfocus@kentfaith.com, please be assured that we always stand behind our products. 

sure, 2 years warranty, any questions, pls just feel free to contact seller via gearfocus@kentfaith.com, please be assured that we always stand behind our products. 

One size up, e.g. if you are already using a 55mm filter, you will need to use a 58mm filter if you need to overlay a filter 

One size up, e.g. if you are already using a 55mm filter, you will need to use a 58mm filter if you need to overlay a filter 

I've never used Hoya ND's, but I have GOBE, KERNEL, ZOMEI, and K&F ND filters. Out of all of them, I like the K&F the most because the colors look great out of the camera and they don't create a vignette around the edges like some of my other nd's which I hate. Because of the great out of camera colors, it gives you more to work with on post-production when you shoot on a flat profile. Also, I've used them during night photography on bulb mode to do light painting and the 4 - 6 stop ones work great for this. Overall, I think for the money the K&F filters are worth it. Awesome product!