Antlia ALP-T Dual Band 3 nm Ha+OIII 2 size extras opinie

503 EUR price without VAT: 409 EUR Shop online: ● ready for shipping  Shop in Warsaw (qty): 3 ● ready for shipping  Shop in Chorzow (qty): 1 ● ready for shipping

CHEAP DELIVERY TO EUROPEAN COUNTRIES CHECK IT OUT!

Antlia ALP-T Dual Band 3 nm Hα + OIII is a professional astrophotography filter that transmits Hα (656.3 nm) and OIII (500.7 nm) bands. The filter has been designed to work with both SLR and color cameras, as well as with monochrome cameras, where it allows you to speed up the signal acquisition process by simultaneously exposing the sensor to two of the three basic spectral lines. This filter is a perfect complement to the Antlia ALP-T Dual Band 3.5 nm SII + Hβ version, allowing you to achieve even deeper contrast and expose the photographed object from the background.

This filter is characterized by a half-width of the passbands of only 3 nm, which, combined with the full separation of the Hα and OIII bands, causes a dramatic improvement in the signal-to-noise ratio already at the stage of taking a picture, which ultimately translates into a noticeable improvement in sharpness and contrast. In tandem with high optical efficiency for the passbands goes a high optical density for the blocked range, thanks to which this filter effectively eliminates the negative impact of light pollution, allowing photography even near large cities.

Note! The Antlia ALP-T Dual Band 3 nm Hα + OIII filter is not recommended for visual observations. Under no circumstances should it be used for solar observations!

Key Features of the Antlia ALP-T Dual Band 3nm Hα + OIII Filter

• high transmittance for the Hα and OIII bands while efficiently blocking the remaining spectral lines
• recommended for use with telescopes with a focal ratio of f/4 or slower
• designed to work with digital SLR cameras, as well as monochrome and color astronomical cameras
• thin frame minimizing the risk of vignetting
• designed to work in environments with high light pollution

Technical parameters

• filter type: dual band filter
• Filter diameter: 2"
• filter thickness: 2 ± 0.05 mm
• filter shape: round
• transmitted bands: Hα, OIII
• position of the maximum transmittance peak (CWL) for the Hα band: 656.3 nm
• Full width half-bandwidth (FWHM) for the Hα band: 3 ^+0.6 _-0.1 nm
• maximum transmission for Hα band: 90%
• position of the maximum transmittance peak (CWL) for the OIII band: 500.7 nm
• Full-Width-Half-Handwidth (FWHM) for the OIII band: 3 ^+0.6 _-0.1 nm
• maximum transmission for OIII band: 82%
• blocked bands: mercury lamps (435.8 nm, 546.1 nm, 577 nm, 578.1 nm), sodium lamps (598 nm, 589.6 nm, 615.4 nm, 616.1 nm)
• equivalent optical density for blocked lines: >OD4.5 @ 300 - 1100 nm
• IR blocking range: up to 1100 nm
• quality of surface workmanship: 60/40
• manufacturing accuracy: λ/4
• parallelism: 30"
• frame: black, anodized
• frame thread: M48x0.75

Set components

• Antlia ALP-T Dual Band 3 nm Hα + OIII filter

Guarantee

24 months