A fantastic filter. I had to wait a while to use it as the weather has been hindering progress. First light was on the Veil Nebula complex with a modified DSLR and Redcat 51. The first 5 minute exposure blew me away. The amount of Ha and OIII detail visible in a single image is astonishing. I had read that the filter was prone to creating halo’s around brighter stars but I’ve yet to see any halo’s in my images. I look forward to using this filter more and more as the quality it delivers speaks for itself.

Unlike most astro purchases this one arrived without clouds, 3 consecutive clear nights and a big bright moon. I inserted it between my astromodded DSLR and scope, I managed to get 5 hours of data over the first two nights of the Rosette Nebula and the quality of the subs was superb, processing the data was so easy, the result was probably the best astro picture I've ever produced. The 3rd night I tried to capture some data on IC 443 the Jellyfish Nebula, 3 hours just isn't enough on this target but what I have got looks very good, I shall be getting more data the next clear night, hopefully with less moon about.

Thanks to FLO for a very fast delivery. I tried out the filter with a ZS61 at F4.8 on the February 26th full moon night on several emission nebulae and obtained good results using exposures of 4 to 8 minutes, depending upon altitude, at ISO 800. The filter worked really well.

Amazing product. Really works in heavily light polluted skies. Highly recommended and lightning quick service as ever from FLO.

Only had a chance to use it once so far but the minute I slotted it in to my scope and looked at my real time image on my PC I could see a huge difference and the couple of objects that I did manage to shoot had far more detail and brightness.
I live in an area where there are LED Street lamps and the Optolong L-Extreme seems to just cut straight past them.

Highly recommended for anyone wanting to get great images of emission nebula, supernova remnants and the like with a OSC or DSLR.

Only had chance to use once so far due to clouds, but am amazed at the results, looking forward to using again

Due to the disruption caused by Covid, I had to wait a while before this 2" L-eXtreme filter arrived, and I've had it for a short while now but long enough to be impressed. I've reserved it for shooting while the moon is fairly well illuminated, and even shooting fairly close to the moon I get decent results. It really does manage to darken the background and help bring out faint details. Well worth the money and the wait.

Amazing results with an ASI 533MC Pro. Highly recommended, particularly if you are in a Bortle zone 8-9 like me. Getting results that I never thought possible from my site.

I use this attached between a 72mm doublet and 533mc pro OSC. Before this filter, I had to drive an hour from a bortle 9 house location to a bortle 4 wilderness, spend 3 hours there scared at darkness, and drive back home for another hour tired and sleepy. This filter saved me from wasting 2 hours on road, spending on fuel and car running costs and most importantly horror of darkness at wild. I can have 10 minute subs under intense light pollution of Doha city including white LED street lights. So far I had great results on nebulas. I can barely see a max of 10 stars with my eyes and this filter can extract nebulosity in 10 min subs.

Received order after 2 days (int'l) - extremely fast!
Will review filter after use!