I definitely see a better contrast with bands on Saturn using this filter using a C9.25 Sct. It beat for me significantly the ZWO UV/IR filter that came with the LRGB set

After struggling with an LPS filter on my modded 700D, FLO recommended this filter for better colour balance. It's excellent! Nice clear images and stars are much easier to process, colour balance is spot on. Also a very good partner for my dual band nebula booster.

I bought this filter as part of a set of four for a full spectrum converted Nikon Z6 to allow normal photography (with this filter) and IR photography with IR Pass filters.

As soon as I received them, I put one into the Z6 but found that contrary to the Astronomic sales video the filter dropped out at the slightest nudge of the camera. I've tried other full frame Z bodies with the same results. Yes, the filters stay put in the bodies, just, but it only requires the slightest nudge for them to drop out, I certainly cannot replicate what the video shows of multiple reasonably forceful taps without dislodging the filters.

Obviously, a lens or T mount holds any filter in place so for Astrophotography or where you want to fit a lens for a whole shoot it is not a big problem. So, if you are willing to accept a loose fit they are good.

I’ve watched the install video several times to check I’ve not missed anything subtle in the fitting and have tried multiple times with the same result. There are no sprung pieces on these filters that engage with the ridges in the Z body cavity, so they rely on the size being correct for an interference fit - other manufacturers Z clip-ins have a form of spring retention on the upper edge that does work.

I did take the time to test and check all four filters received and as far as filter quality is concerned, they are great but fitting wise and staying in place is concerned they are no good for me. Other clip in filters, not Astronomik, fit and stay fitted fine, so, I have returned them and will buy alternatives. I've given three stars as the filter quality is good, but the fitting is not.

Used with my full-spectrum modified Sony a7S. I haven't carried out exhaustive tests with/without the filter, but with the filter there appears to be no star bloating due to excess infra-red light.

So happy with this filter. I bought the ZWO 533 and forgot to order a UV IR cut filter. Shooting the Iris nebula resulted in the main bright orange star near it being pinkish purple. This filter completely tightened all the stars up and corrected the colour which was slightly off too! I'm using this alongside a Canon 70-200 2.8 IS II and 1.4 III extender which generally has very well corrected optics. No halo issues, great quality as I'd expect from Astronomik.

Something to consider when looking for UV filters is if they're par focal, this can be *extremely* helpful and time saving when going between filters!