but it is not 'crystal clear' like a normal 'scope
598044
I have no idea how to rate this, as it is my first experience with thermal optics.  However:  (the negative)

1.  This is NOT a normal 'scope.  It highlights thermal differences.  I bought it primarily for daylight use.  It is about 58 degrees Fahrenheit.  Looking at my dogs in the open and through brush, it highlights my dogs, but not much above the surrounding foliage.  I can tell the creature is a dog when in enough view, but it is not 'crystal clear'  like a normal 'scope.  They appear a (in my case) green silhouettes but not much brighter than the other foliage.

2.  Using as a monocular, focus is not bad (turned 90 degrees clockwise).  Turned as a telescopic sight, the battery compartments are right in the way of the focus ring form.

The Positive:

Controls are easy to use and work as directed.  Perhaps not intuitive, but clear.

I may add more after using at night. but I bought it for daytime use.

TD, Ashford, (Western) Washington
3819877
The light only comes in from one side - at times is does not illuminate the whole object being viewed.  The small magnifier in the handle is very powerful has its own light, but is just not that useful.  The main magnifying lens seems to be glass, and is very clear and very nice. All in all this is a very good lighted magnifier, and feels like it is very solidly built.
635650
This scope is relatively clear, but I have not mastered the bullet drop compensator on the scope and do not care for it really. I would prefer to just have a tasco mil dot scope I think as hold overs with the mil dot are easier that adjusting a turret anyway
1576221
I didn't have high expectations so I wasn't very disappointed when I found it not to be that useful.  It might help you to determine if your 100 yards or 200 yards away, but nothing more accurate than that.  The scope is very clear but I never could get the same reading as the markers on the course except at the distances mentioned above.
345350
This is a quality product and it is well designed and built.  The image seen are very clear.  You can spend hours gazing at the stars.  However, the magnification is not as great as I expected.  In fact, this telescope actually duplicated the magnification that I get from my local Walmart telescope.  Of course, my intent was to take my viewing to the next level by buying this telescope which was suppose to be more powerful.  However, I would recommend this item for beginners.
246547
It's not as good as I had hoped it would be, but I do like it. I agree with the other reviews about fuzziness away from the center. The blue light helps a lot. It does not magnify larger than the other lenses I currently have, but it isn't any worse. Guess I'll just have to keep looking for one that really does what it says it will do.
3995670
This scope is very good.  the glass is very clear at lower powers but it starts to get very blurry around 9 power and up. It becomes too blurry to use at 16 power. I usually use it at 12 power where it is decent. This scope is on the heavy side but it has held zero well. This is a vortex product and I, have had very good luck and I really like their warranty.

Pros:
Warranty
Holds zero
Vortex quality
Adjustable objective

Cons:
Weight
Loss of clarity at higher powers
1694399
It is not completely clear. It also goes quite a bit above the eyebrows, which looks a little goofy with the blue on top, then eyebrows. But it served its purpose already for me. I got a very hard shot with a tennis ball from a short distance right onto it and it did not crack. But I may be looking for another pair with more clarity.
4044712
it mounted ok, and you could clearly see the factory sights. but once I mounted a scope on it i found it ws not square and the scope would not aline. I tried to shim it it but the front was just way higher than the back!
1324363
It's okay. Kind of hard to focus the scope on the item. I would recommend just buying a jewelry magnified scope, would honestly work better. I'm too lazy to return it as well just because it does the job a little but not worth the money.
2067274
There's no fine tuning and it is blurry at max magnification
445643
I got the 67mm version of this filter for Christmas. The build quality is good and it rotates smoothly, but......

The markings that you use to determine maximum and minimum adjustibility were not accurate. I had to loosen one of the rings that hold the glass tight and rotate the glass so the actual dimming effect matched the markings on the outside. Aslo, the glass doesn't appear to be actual optical grade glass. There's a lot of distortions in the glass when you look through just the filter. When I set it to its dimmest point, it's not uniform across the field of view when you point it at the sky. I haven't had experience with quality filters, so I don't know if this is "normal".

If you're on a really tight budget, it's okay.
3501701
I am actually disappointed with this scope, I have found it difficult to zero and maintain a steady point on my Beeman Air rifle.

There seems to be a constant shadow as well as reflection of light from both front and sides.

For the money, guess I shouldn't complain. It will go on the trainer for the grandsons and off the rifles I actually use.
4127641
I bought this scope thinking It was much bigger, I can still use it ,but I bought
a bigger one the other day.

duane
1008321
The scope was easy to mount and sight in. The only detail that is difficult is that the red dot does not have the clarity that I expected. I am not able to adjust it to see the target as I would like.
173512
Lens are not clear, used it couple of times but didn't resolves it purpose.
1871505
it is too weak to call it a magnifying glass. it is like looking through a clean window