Quad Band Pass 48mm

Codice articolo: SJ-QBP48

This filter for astrophotography lets the important lines Ha, OIII, Hb and SII pass, it closes the gap between narrowband and broadband nebula filters.

Suitable for photographing galaxies, reflection nebulae and star clusters, not just emission nebulae
Transmission from 460 nm to 513 nm (H-Beta and O-III) - 53 nm bandwidth
Transmission from 640 nm to 688 nm (S-II and H-Alpha) - 48 nm bandwidth
Well balanced color display, ideal for color cameras but also for high-contrast luminance images
Particularly suitable for objects such as galaxies, star clusters but also for gas nebulae with a natural appearance
Ideal when a broadband nebula filter provides too little contrast and a narrowband filter appears too unnatural
A filter for almost all applications in the deep-sky range
Modern anti-reflection coating suppresses halos, the filter can also be used close to the chip.

Sightron Quad Band Pass Nebula Filter M48x0.75 - 2" mount
The filter is exciting for all astrophotographers who are looking for a universal filter for almost all deep-sky objects, but for whom the contrast of a broadband nebula filter is not sufficient. The quad-band filter reliably suppresses stray light and allows exposure times that are many times longer than without a filter with a corresponding increase in contrast. This also makes it possible to take pictures of galaxies close to cities. The filter lets through all four wavelengths of interest for astrophotography (H-Beta, O-III, H-Alpha and S-II). The result is not only natural-looking nebulae and galaxies, the star colors are also reproduced well.

Is the Sightron Quad Band Pass a narrowband or broadband nebula filter?
The filter can be assigned to both categories. Its transmission band is significantly narrower than that of a typical broadband nebula filter, but with a bandwidth of around 50nm it is significantly wider than a narrowband filter. It bridges the gap between the two filter types. We at Teleskop-Service think that this filter is a very good universal filter for astrophotography, a filter for everything!

Halos around bright stars are suppressed
A modern anti-reflection coating suppresses the disturbing halos around bright stars. This means that the filter can also be used close to sensors, for example between the corrector and sensor.

Thread: M48x0.75 - 2" filter thread
Glass thickness: 1.5 mm
Technology: Interference filter
Diameter of the filter glass: 49 mm
Mount: made of aluminum