Your cart is empty.
Your cart is empty.The Optolong L-eXtreme is a 7nm dual-bandpass filter which can be used with one-shot color cameras like DSLRs and CCD/CMOS astrophotography cameras. It is also more suited for fast systems. The convenience and cost effectiveness of this filter allows amateurs to image emission nebulae even in bright, light-polluted or moonlit skies. The L-eXtreme isolates the H-Alpha and Oxygen III nebula emission lines so that the contrast and signal-to-noise ratio of the nebulae are maximized. For people who are imaging in very light polluted areas or when the moon is out, the L-eXtreme is an excellent choice. The advantage of the L-eXtreme filter is that there is no light transmission between the H-beta and OIII lines (as there are no nebula emission lines there). This reduction in light pollution maximizes the nebula's signal and makes the sky background darker while imaging. Unlike the L-eNhance filter, which is a tri-band (transmits Hb, Ha, and OIII), the L-eXtreme filter is dual-band, passing just the Ha and OIII emission lines in order to deliver improved light pollution rejection. Note: For imaging galaxies and reflection nebulae, the Optolong L-Pro filter is more appropriate as this filter will reject much of the light from those objects.
john brown
2025-07-27 17:23:12
I have a red cat 51 and this filter is a game changer for deep sky objects. I have tried it on my svbony f/7 120ed and so far not much luck. I think the reviews are correct that if you are going to use this, you need a faster scope. I won't take nebula photos without it anymore.
John Richards
2025-07-03 18:43:47
Highly recommend for astrophotography. See my image for results with a Redcat 51 and ASI294MC Pro camera
Sergio
2025-06-17 10:52:01
This filter will coax out all the color of nebula in light polluted skies, a must for AF
Jeffrey Victor
2025-06-15 13:16:40
Great product does exactly what it should.
Matthew. A.
2025-06-10 15:21:02
Excellent filter. Noticeable upgrade over the Lenhance
Customer
2025-02-07 17:56:32
Â
Gerald Indra
2025-01-16 14:11:20
This filter came really quickly. It is now the second l-eXtreme I have, one for each scope setup. These are really great for limiting the captured light frequencies to 7nm or less which brings out the detail in nebulosity around emission and planetary nebula. I use these with an 8" Edge HD SCT and a Redcat 51.
Recommended Products
