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Baader UHC-S / L-Booster Filter

Baader UHC-S / L-Booster Filter
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Choose Filter Size: 1.25Choose Filter Size: 2Choose Filter Size: 50.4mm round unmountedChoose Filter Size: 50mm square unmounted
Price:  £57.00
List Price:  £70.00
(Inc. 20% VAT)
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Product Code:  B2458275
Manufacturer:  Baader Planetarium


Premium deep sky nebula filter from Baader Planetarium. Optically polished.

The Baader UHC-S manages to improve on the contrast of the typical broadband or so-called "Deep Sky" filters.  Sky background is darker, and contrast of emission nebulae are noticeably improved, the high transmission, sharp cutoffs, and more moderate 60nm passband of the Baader UHC-S filter retains a more natural view, yet significantly boosts overall contrast.

A common misperception is that deep sky viewing is limited to low powers, and image resolution is not as important as in planetary observation.  In reality, high magnifications are very common and useful in studying fine details, particularly for the brighter diffuse and planetary nebulae.  Baader UHC-S filters can take high magnifications, and stars retain their pinpoint sharpness.

Freedom from Ghosts and Halos:  Baader Planetarium's filters have always been halo and ghost free.  Baader balances each dielectric coating stack to avoid the ghosts and annoying halos that plague other mfgr's filters.

Stackability:  Unlike most other filters, Baader Planetarium  filters are truly designed to be stacked and combined.  This is possible due to the high optical quality and highly efficient anti-reflection multicoatings.  The ability to combine filters opens up many interesting possibilities, permitting  unique spectral characteristics unachievable with any single filter.

Special Filter Cell:  Baader's special filter cell design offers unique features that enhance their reliability and usability.  Though difficult to produce, the ultra-thin filter cell results in the maximum possible clear aperture, in order to minimize vignetting (1¼" Filter clear aperture is 27mm!, 2" Filter aperture is 45mm).  The special threading has been designed to fit the wide variety of eyepieces and accessories (there is significant variation between the 1¼” filter threading used by eyepiece and accessory manufacturers).  The front 'crown' of the filter incorporates milled notches which make handling and threading the filter a more secure operation in the dark. 

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