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Optolong L-Extreme 7nm Dual Narrowband Filter (H-Alpha and O-III) (2")
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Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
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Purchase options and add-ons
Brand | Optolong |
Photo Filter Thread Size | 48.04 Millimeters |
Coating Description | Multi Coating |
Photo Filter Effect Type | Enhancing |
Water Resistance Level | Not Water Resistant |
Product Dimensions | 2"L x 2"W |
About this item
- Dual H-Alpha/O-III 7nm narrowband filter
- Allows for imaging in bright man-made light pollution and moonlit conditions
- Most useful for One-Shot Color cameras
- Take color images without needing to combine images with multiple filters
- Use for taking images of emission nebulae
Frequently bought together
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This Item Optolong L-Extreme 7nm Dual Narrowband Filter (H-Alpha and O-III) (2") | Recommendations | dummy | dummy | dummy | dummy | |
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Price | $306.00$306.00 | $217.60$217.60 | $249.00$249.00 | $171.16$171.16 | $159.99$159.99 | $198.00$198.00 |
Delivery | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | — | Get it as soon as Tuesday, Apr 2 |
Customer Ratings | ||||||
Sold By | StarPal | StarPal | StarPal | StarPal | SVBONY Direct | StarPal |
thread size | 48.04 millimeters | 48 millimeters | 0 millimeters | 1.25 inches | 2 inches | 48 millimeters |
photo filter effect | Enhancing | Enhancing | Enhancing | Enhancing | Nebula, Polarizer | Enhancing |
water resistance | not water resistant | not water resistant | not water resistant | not water resistant | not water resistant | not water resistant |
Looking for specific info?
Product Description
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.
Product information
Product Dimensions | 2.95 x 2.76 x 0.79 inches |
---|---|
Item Weight | 1.55 ounces |
ASIN | B08BWTFZ22 |
Item model number | 139 |
Customer Reviews |
4.7 out of 5 stars |
Best Sellers Rank | #95 in Telescope Filters |
Date First Available | June 26, 2020 |
Manufacturer | Optolong |
Country of Origin | China |
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Reviewed in the United States on July 20, 2023
Reviewed in the United States on February 15, 2022