![]() ![]() The narrower passbands of the L-eXtreme are especially important in blocking moonlight and broadband light pollution found in many urban and suburban centers. Asking 340 for all three, including PayPal and shipping to lower 48. It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. The 3nm isolates the nebulae's emissions into H-Alpha (red) and OIII (green-blue). Ha- 7nm Sii- 6.5nm Oiii- 6.5nm Prefer to sell the set, but depending on response, may be willing to separate. Description Product Details The L-Ultimate is a 3nm dual band filter designed to drastically reduce the effect of light pollution. Unlike the L-eNhance filter, the L-eXtreme blocks the weaker H-beta emission line at 486nm to deliver more contrast in the fainter regions of nebulae, even in light-polluted sky. Filters are in excellent/like new condition and lived in my filter wheel from time of purchase until now. The convenience and cost effectiveness of this filter allows amateurs to image emission nebulae even in bright, light-polluted or moonlit skies. The majority of nebulae have their strongest emission at these two wavelengths. 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 has a narrow 7nm passband centered on H-alpha at 656nm and a second 7nm passband centered on OIII near 501nm. The Optolong 2” L-eXtreme filter builds on the success of the renowned L-eNhance filter to deliver an even higher degree of contrast when imaging emission nebulae, planetary nebulae, and supernovae remnants. Optolongs L-eNhance filter effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of around 90. ![]() Color Correction & Minus Violet Filters. ![]() Correctors, Focal Reducers & Flatteners The filter is a powerful tool for isolating these two important nebula lines against the effect of light pollution and moonlight, and it saves time by allowing. ![]()
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