TS Optics 2" CLS broad band nebula filter - visual and photography
Price
69.00 €
Shipping
7.50 €
TS Optics 2" CLS nebula filter for deep sky observation and -photography
Broad band filter for city light suppression, also suitable for small aperture
This
Clear Sky-(CLS)-filter is optimized for the visual observation and
photography of deep-sky objects in urban areas. Artificial brightening
of the sky background is nearly fully blocked while stars and nebulae
keep their brightness. Contrast is enhanced.
In opposite to the UHC filter which only transmits narrow spectral
ranges close to desired lines, a CLS filter just blocks the range(s)
where undesired lines lie. As a result, there are the following
differences between the filters:
Therefore, CLS and UHC filter complement each other very well.
Fields of use
Features
Transmission range
Delivery contents
Broad band filter for city light suppression, also suitable for small aperture
Broad band filter for city light suppression, also suitable for small aperture
This
Clear Sky-(CLS)-filter is optimized for the visual observation and
photography of deep-sky objects in urban areas. Artificial brightening
of the sky background is nearly fully blocked while stars and nebulae
keep their brightness. Contrast is enhanced.
In opposite to the UHC filter which only transmits narrow spectral
ranges close to desired lines, a CLS filter just blocks the range(s)
where undesired lines lie. As a result, there are the following
differences between the filters:
a CLS filter transmits more light and is therefore better suited for
smaller instruments from 60 mm, especially at higher magnification.- CLS filter is more color-neutral, especially photographic.
a CLS filter is also effective for star clusters and galaxies, despite this is mainly the case in photographic usage.
an UHC filter provides, especially visually, significantly more contrast.
Therefore, CLS and UHC filter complement each other very well.
Fields of use
Observation of deep sky objects with telescopes from 60 to approx. 150 mm aperture
Astro imaging: background brightness is reduced significantly allowing doubling the exposure time.
Features
Substrate fine optically polished with plane parallel surfaces
Anti-reflex coatings
2" diameter and filter threads on both sides
Transmission range
The filter has two main transmission windows exactly there, where gas and planetary nebulae have their main spectrum:
[OIII] and H-Beta: approx. 95% transmission between 420 nm and 530 nm
H-Alpha: from 610 nm, the filter opens again and lets red light pass nearly unblocked.
Delivery contents
2" CLS Filter
Protective plastic case
Broad band filter for city light suppression, also suitable for small aperture
Item number
TSO-TSCLS2
Manufacturer
TS Optics
EAN
4250477902765
Weight
1.0 kg
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