If like me you like to switch between objects, then this is a great addition to have, and as I am fortunate to have a permanent setup, this avoids the obvious swapping of filters as you change object, thus eliminating the possibility of dust getting into the setup.

I use OSC cameras, so with five slots, this allows me to move from Narrowband to a Moon filter!

Setup is very easy and works well with, ASCOM and PC and ASI AIR Pro ( note with the ASI air, lack of ability to rename the slots, so have a plan!)

I bought this to compliment my ASI533MC as I want to be able to swap between a UV/IR filter and the Optolong L-eXtreme filter without introducing dust into my system. The system is well sealed and does not offer any open spaces to allow dust in so long as the rest of the imaging train is affixed.

ZWO include a screwdriver so you don't need to use any other tools to open up the filter wheel. On the inside, there are numbers against each filter slot which corresponds with the index position within whatever software you use to drive the filter wheel. Once I installed my filters, I wrote down the filter position and filter type onto a sticky label and affixed to the outside of my filter wheel so I can remember which filter is where (more on this later). The 1.25" filters are a perfect size for the ASI533MC as the filter wheel is attached directly to the camera.

The system plays nicely with my ASI Air Pro as you would expect. At arms distance the filter wheel makes zero noise when indexing. Sadly, the ASI Air software doesn't allow you to freely name your filter (there's options for L, Dark, R, G, B, S, H, O etc) so right now the L-eXtreme is shown as "2" to indicate the index position number, hence why I put the sticky label on the filter wheel!

All in all, this filter wheel is well worth the money and I cannot see any downsides.

Solid, compact and very quiet in operation. Have used with Astronomik filters without issue.

Great product, absolutely silent and smooth operation, fair price and fast delivery by First light optics to germany. Many thanks!

Bought this to use with Optolong and ZWO filters together with my ASI1294MC Pro .
Really excellent filter wheel and would highly recommend it.

It's hard to get something as good for this money. Very good build quality and works perfectly with my ASIAIR. Highly recommended.

Pretty solid piece of kit. Does exactly what it says on the tin. Price is a bonus. I’ve this attached to an ASI 1600MM and a ZWO OAG. All fits together nicely and worked straight out of the box.

Very solid build quality and comes complete with various extras such as thread adaptors and washers/screws for unmounted filters etc. Even a screwdriver! Small and quite light. Fits nicely with my 1600mm cool. Usual great service from FLO. Very happy customer.

This Filterable proved an Ideal replacement for my old Atik Unit. I could not get a driver to install. Even Atik support had no solution. Perhaps Windows 10 could not accommodate the device.
However, the ZWO was a joy to install, it took about five minutes, and job done.
The price was pleasing too, I only needed a 5 filter one, and this little fellow suited both my requirement, and my wallet.
Thanks to FirstLightOptics too for a great service too.
Staff always ready to advise.

The filter wheel is perfect for narrowband filters, very smooth on the filters switch, and very well done !. Very solid aluminum, ! the only problem is! , if same filters have more them 3mm high , the filter wheel will don’t work becouse the filters wheel will be stuck and do not change filters , in my case : I buy from China a UHC for my small light aberration, was a nice filter but dint fit , , my new choice was Astronomik filters and perfect choice , Ps: ty FLO and crew for the advices and support ,