All 3 filters for me are very useful. The stand alone ring wasn't sure how much I'll actually be using it however, but surprisingly I just leave it on my lens unless it's pretty inclement weather, which again I use the UV filter as a protective layer for use the glass. Personally I haven't found that the UV filter does much other than protect my lens and as the glass in my lens is so high quality I don't leave it on as it could degrade the photos, so I use the stand- Alone ring. I didn't notice any deterioration when using the UV filter, so no complaints. However, as mentioned, I only use it to protect my lens. The CPL filter works wonders and the ND filter is great for long exposer shots. The combination with the magnetic touch makes this absolutely flawless. would recommend.

I own quite a few K&F Concept Products. They provide quality products without the hefty price tag we're used to see in the photography world.

Let's talk about the filters individually first. All 3 filters are of top quality, at least on this price point/tier, as we're used to get from K&F Concept products:

-The CPL Filter has no color shifting and performs as expected.
-Same with the ND1000, although i don't use 10-stop filters that often (my most used filter is a VND Nano from K&F Concept) during my test it worked well, no cross present, even while using step-up rings.
-The UV Filter has no color shifting and the main purpose these days of the UV filter is to protect the lens surface, BUT, It is where this VERY MINOR issue this kit has: The magnetic ring holder.

The magnetic ring holder works great with the ND and the CPL, just not as good with the UV Filter, but it is not by ANY MEANS bad or i'd call it unsecure, at least not on the 82mm filter size version, your mileage may vary depending on the kit size you got as the magnetic surface may be different for your version, just the grip doesn't feel as tight as it does with the other two filters and there is a TINY bit of play, but not enough to warrant losing a star over it, i mean if you shake the camera at full strength you may drop it, but on regular usage i do not see it just falling off the ring holder.

As the sum of all parts i'd say this was almost perfect. This kit complements my VND ND2-400 and includes everything i need to cover all my filters along my step-up rings. The UV filter thing doesn't make it lose a star, but maybe half, so i'd say 4.5 but since there's no option for that if i had to decided between 4 or 5 stars, i'll go with 5.

These are so easy to use and the quality is fantastic - both the build quality and the picture quality. I can't see any colour cast whatsoever from both the CPL & ND filter. I think you would really need to pixel peep to see any sharpness difference, and even then I'm not sure there is.
Being able to attach the filters to both the UV filter and filter ring is really clever - I keep the UV on my 24-70 F4 and the filter thread ring on 16-35 F4 so it makes it even faster to clip on the filters no matter what lens I use.
Since the ND isn't variable, there's no dark X. And no vignetting at 16mm, unlike when I use my square filter set.

The downsides that I see at the moment:
- You can't replace the filter thread on its own, so if you break or lose it, you have to buy a new set. I contacted support but was asked to pay $16 for delivery of a new thread....
- The range of NDs isn't as big as a square filter system (yet) and again I'm not sure if you can buy them as singles or whether it's just part of these kits

I really like the microscope. It's an art to use one. You have to really take your time. Or get some more light. It's like photography. It is a wonderfully made. Microscope. I've been able to see all kinds of new things. It is well made. It works fantastic. I can't wait to test more of their products. Thank you. It's been a joy.

They are very easy to use and the quality is fantastic - both build quality and image quality. I don't see any color from the CPL filter and ND filter. I think you'd really need to pixel peep to see any difference in sharpness, and even then I'm not sure there is. Being able to attach the filters to both the UV filter and the filter ring is really smart - I keep the UV on my 24-70 F4 and the filter thread ring on 16-35 F4 which makes the clip even more fast filters, no matter what lens I'm using. Since the ND is non-variable, there is no dark X and no vignetting at 16mm, unlike my set of square filters. The downsides I see so far:

Kentfaith Mini Microscope

The microscope arrives in the manufacturers box and contains:

1 x Handheld Microscope
1 x Carry Pouch
1 x Screwdriver for Battery Insert
5 x Pre - Pre-Prepared Microslides
1 x Instruction Manual Sheet.

Firstly you must insert 1 x AAA battery (not included) using the mini screwdriver included in the box.

The microscope is an ideal size for small hands to hold and to slip in your pocket too and is very light weight but actually feels a quality built product.

The already prepared slides ready to use are of a fly mouth, piece of leaf, leg of a bee, piece a tree and a section of a mouse tail (ewwwww)

This pocket travel microscope is brilliant as a first kit because it its simple to use, an on off button for the LED light, one dial to focus and one dial to zoom in and out, a very non complicated toy with educational fun integrated in one.

K&F makes some of the finest UV Filters for the price. The ring also includes grooves so you can take off the filter easily. I would definitely recommend it to people who have expensive lenses and want a peace of mind.

These are so easy to use and the quality is fantastic - both the build quality and the picture quality. I can't see any colour cast whatsoever from both the CPL & ND filter. I think you would really need to pixel peep to see any sharpness difference, and even then I'm not sure there is.
Being able to attach the filters to both the UV filter and filter ring is really clever - I keep the UV on my 24-70 F4 and the filter thread ring on 16-35 F4 so it makes it even faster to clip on the filters no matter what lens I use.
Since the ND isn't variable, there's no dark X. And no vignetting at 16mm, unlike when I use my square filter set.

The downsides that I see at the moment:
- You can't replace the filter thread on its own, so if you break or lose it, you have to buy a new set.