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BAO31

Baader
in stock
O[III] filter - 1.25" - Baader


69,00 EUR
incl. 19 % Tax
excl.Shipping costs
Description

Baader 1.25" O[III] filter 1.25" O-III Filter - Nebula observation with highest contrast

O-III filter especially useful for planetary nebulae. In the O[III] line, they show their most interesting structures. But O[III] regions are also embedded in other gas nebulae. So an O[III] filter can show completely different details as an UHC filter or no filter.

The Baader O[III] filter is very narrow banded with only 8 nm FWHM. We recommend it for apterures above 200mm. It is a good addition to the broad band UHC-S filter from Baader.
Baader O[III] filter transmission curve
The transmission curve shows a small 8nm FWHM band - exactly on the O[III] line at 501 nm.

With the O[III] filter, even under worse stray light conditions in big cities, successful observations are possible. The background remains black also at big exit pupils.

The filter is dielectrically coated and aging-resistant, robust and scratch-proof. Highest image quality is guaranteed by plane-optically polished surfaces.


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