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Manufacturer: Optolong
Product number: L-eXtreme1
EUR238.00new
EUR 238,00
incl. 19 % VAT (DE)
The VAT indicated refers to that applicable in Germany. After logging in, the VAT amount is adjusted to the applicable VAT of the stored delivery country. Therefore, the final price may vary accordingly.
excl. 6.95 € shipping costs (DE)
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- Details..
- Technical data..
- In the box..
- Reviews..
Optolong L-eXtreme Dualband Nebula Filter for Color Cameras
The spread of cities and the associated light pollution is a growing problem for astrophotographers. A possible solution is the use of MONO/SW cameras and narrow-band nebula filters. This is expensive and costs valuable exposure time, which is often not available.Optolong L-eXtreme filters allow the use of color cameras such as SLR or single-shot astro cameras and thus save time and money. The filters are dual bandpass filters that have been specially developed for color cameras. The important areas where important nebulae glow, such as H-alpha and oxygen (O-III), are allowed to pass almost unhindered. The rest is blocked. The filter thus represents a real alternative to narrow-band nebula photography with MONO cameras.
Optolong L-eXtreme filters offer even more contrast than the L-eNhance. The transmission is even narrower and only H-alpha and O-III are transmitted. The result is a harder contrast for maximum detail recognition.
| Filter size: | 1.25" mounted |
| Height of the cell: | 5 mm without external thread, 7 mm with M28.5 external thread |
| Substrate: | high quality optical glass (Schott) |
| Surface: | Fine-optically polished |
| Coating: | Multiple coating |
| Filter type: | Dual bandpass filter |
| Filter thickness: | 2 mm |
Which side of the filter needs to face towards the telescope?
Optolong has a good explanation on their page with a check on unmounted filters. With mounted filters, it´s easy. The side with the external thread must face the camera.Link to iOptron page: Should Optolong filters be installed in a certain orientation? (external link)
You can download the generated PDF from our own server.
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Reviews
Written by Hunn Marcel
on 2023-03-05
"Sehr gute Qualität. Ein echter bringer."
Written by Christian Wöhler
on 2022-10-05
"Den Optolong-Filter verwende ich in Kombination mit einer gekühlten QHY294C-CMOS-Farbkamera. Hierdurch lassen sich Nebel, die im H-alpha- und im OIII-Bereich strahlen, mit einer einzigen Aufnahme farbig abbilden, wobei auch bei starker Lichtverschmutzung der Kontrast zum Himmelshintergrund gleichzeitig sehr hoch ist. Im direkten Vergleich des Rotkanals der Optolong-Aufnahmen zu monochromen H-alpha-Schmalbandaufnahmen derselben Nebel ist unter vergleichbaren Beobachtungsbedingungen praktisch kein Unterschied in der Wiedergabe der H-alpha-Strukturen zu erkennen, nur dass mit dem Optolong-Filter natürlich noch die OIII-Strukturen im Grün- und Blaukanal hinzukommen. Dies habe ich bislang an NGC 6960 (dem westlichen Teil des Cirrusnebels im Schwan), dem Supernovaüberrest NGC 6888 im Schwan und dem Planetarischen Nebel Sh2-188 in der Cassiopeia testen können. Alles in allem ein hervorragender Filter für HII-Regionen, Supernovaüberreste und Planetarische Nebel, mit dem die ja immer knappe Beobachtungszeit unter guten Bedingungen optimal ausgenutzt werden kann."
