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

Easy to install and use. Check diameter of your handlebar first, though.

I need it to fit a 2" diameter opening and it's for 3"

Excellent large diameter mike for the price. You would have to spend at least 4X more to do any better.

I was going to get a Polaroid version but the price for postage was almost as much as the filter. So happy I stumbled upon this one! It's worth mentioning that this filter is perfect for a wide-angle lens (It works great with my Panasonic Lumix 12-35mm F2.8), since the outer diameter is much larger than the inner diameter (on the 58mm filter I bought anyway) and that minimises vignetting. I can't get the exact outer measurement but it's somewhere in the 65mm range and I wouldn't recommend stacking an extra filter on the end of this anyway. If you need even more ND reduction, put a filter before it instead. The Color cast is minimal, and can easily be tuned on post if you shoot in RAW, or even calibrated with the camera's "white balance" before shooting. Even though I can see *very slight* ripples in the glass when light reflects off it, I see zero distortion on the captured image. Build quality is great, feels sturdy and is well machined.

Yes, this thing blows. In a good way. I would say it blows as hard as a compressed air can at full capacity. The opening of the long nozzle of this blower is .75CM in diameter, compared to the 1mm hole in a compressed air can and thus in actuality, it moves way more air volume. The short nozzle is even smaller in diameter and thus should blow an even more focused beam of air. It beats an air-can in that it can sustain this power for many minutes. An air-can will either get cold and loses power, or simply runs out of gas. There's also a small LED light pointed where you're blowing, a welcome addition. There are 3 speeds and also a nozzle with a brush-end.One tiny gripe here that is more of a surprise IMO is that one of the 4 attachments is an air nozzle for inflating things such as beach balls, air mattresses, etc. The manual depicts a cap piece for this attachment, it is missing in my box. Regardless, I was not expecting this attachment from the get-go and the cap is unnecessary.I also think there should be some sort of a filter to keep dust from entering the mechanism, These is only a non-removable plastic screen to keep out large objectsAlthough it may be perhaps a bit pricy, $60 @ time of writing, I find it priced competitively to other options here. I'd give this 4.5 stars.

Product works well. The first issue is that it can’t mount to the larger diameter on the frame. I could only mount it to the handlebar. Also it would be nice if it could swivel up and down with phone attached not just the ball that turns the phone around. If you have a pop out button mounted on the back of your phone that gets in the way. Maybe you should have 2 slides for top and bottom.

Folded diameter is about 8 inches which makes it possible to take on most outings.