First class service as usual, not used the said item yet but it came very well wrapped and has a nice little case to keep it in. Well pleased.

Usual first rate service from First Light Optics. Fast delivery. Product arrived well packaged and safe. Works perfectly. I'm a real fan of this company and highly recommend.

Nice filter, works well on the moon, didn’t really help bring out details of Mars. I used one half in my Barlow lens, the other half in my eyepiece.
Thus rotating the eyepiece varied the light coming through

The moon with my 10 inch dob can be very bright, and this filter is very good at dimming the moon. Because you can adjust how much of the light you want to let in, you can adjust the brightness so you won't loose detail while the image not being too bright. I give it 5 out of 5 stars because of the price and functionality, but in the beginning it can be a little annoying to remove the eyepiece each time you want to either dim or brighten the image.
Overall I would recommend it because of its price and flexibility.

I have used several ND filters with small telescopes for looking at the moon and they do a decent job. On my 12" Newtonian the Moon is painfully blinding with most ND filters I have tried. This is only filter that works, the double polariser allows you adjust the amount of light transmitted to the eye with no noticeable colour cast or reflections. To make Lunar viewing a pleasant experience again, at it's lower settings it also takes the edge of the glare from Jupiter making it easier to pick out details.

I using a single eyepiece you need to guess a little with setting but you can separate the filter allowing you to put one half in a Barlow or comma corrector (if you have one that accepts a filter) and the other on an eyepiece, this gives finger tip control of the filter as you move from fully illuminated parts of the moon to the terminator.