All I can say is that it works and I don't see any color shift in my images while using this filter.

It's exactly what I needed to watch how mums doing during shift change.

I ended up needing vertical lens shift so this projector didn't work out for me, but the picture quality and brightness was really great for the short time I tried it.

After reading a ton of reviews on all kinds of sites this one came to my attention as a contender. Two things I look for, sharpness and sharpness. It is sharp, plenty sharp considering you are putting an additional piece of glass in between your subject and film plane. I shot with my Canon 16-35 III and my 5DSr which is as good of a combo as you can find in the dlsr class in terms of resolution and sharpness. With this filter, I did not notice any real drop off in sharpness other than what i expected (hoped for) I would see with this filter. For that alone it gets to stay in my rig. As for the color shift and vignetting, yeah it gets a blue shift and a little vignetting but nothing you can't easily fix in post so if you really want you could set up a preset in LR. to clean up the color shift but really, it's not a big deal. Compared to the higher priced ND's out there, I can't see any others being THAT much better than this one. Oh and a pro tip: to get the best out of using this filter, lock up your shutter, set your focus and switch to manual focus (AF won't work with a 10 stop filter), carefully install the filter holder and then trigger your shot with a remote. The camera must stay as still as possible.

Amazing wheel, absolutely love it, i would recommend getting the shifter and changing shift knob to a real car shift knob

K and N has the best products around. With a good synthetic blend, and this oil filter, I shift up and down really smooth.

Used this K&N Filter to replace a stock Harley air filter on my FXSTC.It's an easy install.....took about 15 minutes. I noticed an immediate improvement in performance. My shift points went down a couple MPH. I didn't so much notice a lower shift point in the lower gears, but when riding 2 up with my wife, I can now comfortably go from 5th gear to 6th gear at 61 or 62 MPH without lugging the engine.....it purrs along perfectly as long as you're not climbing steep hills or needing to accelerate quickly. Before installing the K&N filter, I couldn't shift into 6th until at least 65 MPH.It's engine is definately peppier than it was before.I also checked the overall miles per gallon a number of times, and I'm up 2-3 MPG as well......so it's all good ! We took a longer ride last weekend and actually cracked 50 MPG. Typically after installing the K&N we've been running 48-49 MPG. Previously with the Harley air filters I was running at about 46 MPG.

I work third shift, 12 hours. One earbud alone lasts ALL night! I only charge then 2 maybe 3 times a week depending on usage. Absolutely worth every dime.