I picked this up as I'd been having trouble getting pin sharp stars, particularly with longer lenses - might be my eyesight. Either way, once you find a star to focus on, this worked fantastically well and removed any doubt that I'd focused correctly. I've ruined a few Milk Way shots in the past because of slightly out of focus shots, even though I was certain they were sharp at the time. Less guess work with the manual fine tuning = peace of mind. Highly recommended.

One of the trickiest aspects of astrophotography is focusing. Due to the low light we work in, getting perfect focus on every shot can be very hit and miss if you’re relying on your camera’s viewfinder or ‘live view’ display. Certainly for me, I really struggled to get perfect focus, often resulting in out of focus blurred shots.

Having read a number of articles about the so-called 'Bahtinov Mask’ which uses optical diffraction to align three ‘spike’ lines to achieve perfect focus. Using your camera’s ‘live view’ display to zoom in on a star, all you have to do is to adjust your focus until the central ‘spike’ sits perfectly between the two outer spikes. It really is that easy! I personally then lock down the zoom ring on my lens using sticky tape before removing the filter. You’re now ready to start shooting beautiful sharp images :-)

The MoveShootMove Star Focus filter fits to any lens with a 82mm screw thread. I purchased mine with an additional 77mm adaptor which comes in very handy if you want to use the filter with lenses like the 70-200mm, 24-70mm or 16-35mm wide angle. Surprisingly, MoveShootMove don’t offer a 95mm adaptor but I managed to pick one of these up on Amazon.

All in all, I would not hesitate to recommend the Star Focus Filter. If you struggle to achieve perfect focus then buy one today - this thing is a must.

I have now used this on numerous occasion with my sony setup it just takes all the guess work out of focusing and is quick so you can start imaging almost straight away, great product

I received my Star Focus Filter several weeks ago. I found it to be be excellent on zoom lenses but not so good on wide angle lenses. Wide angle lenses the image star is too small to get an accurate focus. If there is something else in the sky, eg a bigger object it would pay to focus on that then go to your subject.

This star focus filter makes focus on stars a breeze. Super useful. Everything this company makes are well thought out designs.

It fits the lens with the adaptor, quality seems good. Looking forward to try it.

La mejor forma de enfocar las estrellas, fácil de usar.

All in good conditions. Not used yet because high level of air pollution

Everything perfect

The Dydimium filter is very effective at reducing the impact of light pollution. Coming with an optional range of adaptors for different lens sizes means it fits every lens I have bar one - the ultra-wide angle fast lens that has a bulbous front!
In my area we certainly need something like this with major housing developments within 15Km in all directions. Just why we need to shed so much artificial light upwards by wasting so much energy is beyond my comprehension.

Trying to image something like the Comet C/2023 A3 Tsuchinshan-ATLAS, which is never that high in the sky at latitudes above 50º, was always going to be a challenge in my location but this filter certainly helped when I fitted it to my 70-200mm, f/2.8 Sigma zoom lens. I would recommend that you compensate for the reduction in light passing through by increasing your ISO by up to +1EV if shooting with a full frame camera, maybe +1.5EV for an APC-S sensor.