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Antlia ALP-T 2 Inch Dual Band Narrow Band Nebula Filter - H-Alpha and O-III - - 5 nm

Name: Antlia ALP-T 2 Inch Dual Band Narrow Band Nebula Filter - H-Alpha and O-III - - 5 nm
Brand: ANTLIA
SKU: ALP-T-2
Price: 555 EUR

The 2" narrow band nebula filter allows nebula photography with extreme contrast with MONO and COLOR cameras - light pollution is no longer an issue.

2" low profile filter mount with M48x0.75 thread

Suitable for telescopes and lenses with a focal ratio of f/3 and slower

Optical Schott base substrate

Blackened edges to avoid internal reflections

Extremely narrow bandwidth of only 5 nm for maximum contrast

Precise transmission in H-alpha and in O-III

Filter thickness 2 mm

Supplied in convenient plastic transport box

Manufacturer: ANTLIA

Product number: ALP-T-2

EUR 555,00

incl. 19 % VAT (DE)

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excl. 6.95 € shipping costs (DE)

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Antlia ALP-T 2 Inch Dual Band Narrow Band Nebula Filter - H-Alpha and O-III - - 5 nm

The 2" narrow band nebula filter allows nebula photography with extreme contrast with MONO and COLOR cameras - light pollution is no longer an issue.

2" low profile filter mount with M48x0.75 thread

Suitable for telescopes and lenses with a focal ratio of f/3 and slower

Optical Schott base substrate

Blackened edges to avoid internal reflections

Extremely narrow bandwidth of only 5 nm for maximum contrast

Precise transmission in H-alpha and in O-III

Filter thickness 2 mm

Supplied in convenient plastic transport box

Details..
Technical data..
In the box..

Antlia ALP-T Dual Band 5 nm Narrow Band Nebula Filter for B/W and Color Cameras

Antlia designed this 5 nm dual line-pass filter for one-shot color cameras (OSC), DSLRs and mirrorless system cameras. However, it can also be used as a narrow-band filter for mono cameras to save valuable shooting time and produce extremely high-contrast luminance shots, even in moonlight and near cities.

The ALP-T dual-band filter passes red H-alpha light (656.3 nm) and green O-III light (500.7 nm) and blocks all other wavelengths. In particular, the unwanted wavelengths of light pollution and airglow are blocked. This allows you to take deep deep sky images even in moonlight and from close to the city. The signal-to-noise ratio is greatly increased, allowing you to bring out even the faintest nebulae.

Astrophotographic results obtained with this filter on Astrobin

Here you can find some astrophotographs made with this filter: Link to Astrobin

The quality features of Antlia narrow band filters at a glance:

High light transmission and smallest bandwidth to maximize contrast.

Steep spectral profile minimizes halos around bright stars

Single substrate to eliminate internal reflections

Usable in light-polluted areas and dark locations

Extends exposure time in moonlight conditions

Antlia narrowband Pro filters can be used with low signal loss down to f/3 systems

All Antlia narrowband filters are blackened at the edges to prevent internal reflections of stray light

Superior optical reliability reduces image post-processing effort

Substrate:	Schott optical substrate
Filter thickness:	2 mm
Cell:	Low-profile metal cell with M48x0.75 filter thread
FWHM:	5 nm
CWL:	656.3 nm (90%), 500.7 nm (82%)
Surface quality:	S/D (scratch/dig)= 60/40 (Refer to MIL-O-13830)
Surface accuracy:	Lambda/4 or better

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Reviews

Written by Walter Schreiner
on 2023-03-24

"Geht bei Vollmond richtig gut, Sterne ohne Hallo, bin in die Ecken sauber"

Written by Christoph Dombrowski
on 2023-02-17

"Sehr gute Wirkung bei Mondlicht. Getestet mit Canon EOS RP und R10 an ES 102/714mm und Askar 200mm."

Written by Christian Höferlin
on 2022-11-03

"Ein Filter der hält was er verspricht, vor allem hat man nicht mit Halos um die Sterne zu kämpfen wie bei der Konkurenz."

Written by Christian Koll
on 2022-01-20

"Einwandfreier Filter, keine Halos bei hellen Sternen. Halte ich für den aktuell besten Dual-Schmalbandfilter!"

Written by Ralf Schäfer
on 2022-01-11

"Ich habe den Antlia ALP-T Filter nun ein paar mal ausprobiert. Einige male bei normaler Lichtverschmutzung hier im Ruhrgebiet (mitten aus einer Großstadt heraus)und einige male war zusätzlich der Mond am Himmel (Halbmond). Der Filter hält was er verspricht. Der recht schmale Banddurchlass von 2 x 5nm unterdrückt hervorragend und zuverlässig die Lichtverschmutzung und das Mondlicht. Schwache DeepSky-Objekte in Ha und OIII sind dann mit einer OSC-Kamera recht schnell und gut sichtbar. Die mechanische Verarbeitung des Filter ist top und die Beschichtung(die tatsächlich goldfarben glänzt) auch. Der Filter lässt sich gut reinigen. Ich habe den Filter auch an einem APO-Teleobjektiv an einer OSC-Kamera getestet. Das Objektiv hat sogar F2.8 und ist extrem lichtstark. Der Filter funktioniert hier auch. Es kommt genügend Signal durch. Beispiel: B33 ""Pferdekopfnebel. Bei 30 Sekunden Belichtungszeit und F2.8 bei 300mm Brennweite des APO-Teleobjektivs und hohen Gain (ASI-Einstellung ""High"" = 240) wird B33 problemlos auf einem Einzelbild(natürlich mit Image-strech) abgebildet und ist sofort sichtbar. B33 ist auch sehr gut zum prüfen, ob der Filter Halos an hellen Sternen erzeugt. Im gleichen Bildausschnitt von B33 ist ja der recht helle Stern Alnitak. Kein Halo sichtbar. Ich bin sehr zufrieden mit dem Filter und kann ihn trotz des hohen Preises empfehlen. Der Unterschied zu anderen Duo-Narrowband-Filtern mit z.B. 2 x 12nm Durchlass ist deutlich merkbar. "

Written by Lutz Kirchner
on 2022-01-08

Im Vergleich zum Optolong L-eXtreme besserer Kontrast und keine Halos bei helleren Sternen. Getestet in Kombination mit einer ZWO ASI 2600 MC Pro.

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Antlia ALP-T 2 Inch Dual Band Narrow Band Nebula Filter - H-Alpha and O-III - - 5 nm

Antlia ALP-T Dual Band 5 nm Narrow Band Nebula Filter for B/W and Color Cameras

Astrophotographic results obtained with this filter on Astrobin

The quality features of Antlia narrow band filters at a glance:

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