Honestly I've seen many images of the L-Enhance, and few have impressed me. That might be because many people who have the gear and skills to produce great images don't bother with this filter, or that the filter itself is so difficult to use that it's not worth it to get one.
I've processed a single image shot with an L-enhance on some Canon camera. In addition to the god-awful banding and pattern noises, the data was, quite frankly, crap.(the person shot it with a Reduced ED80, so he was shooting at F6.4. This coupled with non-sufficient exposure length of 3 minutes and only 3hr total integration led to a complete mess of data, even Ha)
The L-Extreme however does actually seem interesting, assuming the Oiii part is going to be of high quality, opposed to the issues with the standard Oiii filters by optolong.
The only disadvantage that I see, is that Noone knows how it performs. However I'd rather be shooting RGB than use an L-Enhance, it's not a LP filter and no Narrowband filter either, it's just not good.
IF you get a narrowband filter, get a Reducer for your scope. At least 0.8x, better even 0.65x. I've had 13 hour integrations with my unreduced ED80, and it was still a mess when stretched to reveal the faint.
To sum it up, I'd go ahead and buy it if you don't want to spend more money and time on separate filters. If reviews are good, I will sell my baader filters and buy an L-Extreme. However I doubt that they will provide similar levels of sharpness and contrast without errors, but I would be happy to be proven wrong.
Edited by Huangdi, 07 June 2020 - 10:33 AM.