Manufacturer: Baader
Product number: BA2458396

EUR 175,00


incl. 19 % VAT (DE)  
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excl. 6.95 € shipping costs (DE)  
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Product expected to be available from 01.01.2025

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  • Details..
  • Technical data..
  • In the box..
2" OIII Filter - 10 nm Narrowband
For extreme contrast enhancement when observing nebulae


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


The Baader OIII filter is very narrow banded with only 10 nm FWHM
We recommend it for apertures above 200 mm. Below, only low magnification is possible. It is a good addition to the broad band UHC-S filter from Baader.


Baader OIII filter transmission curve
The transmission curve shows a small 10 nm FWHM band - exactly on the OIII line at 501 nm.
With the OIII 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.
Surface:plane-optical polished
Coating:hard coated
Bandwidth:10 nm at 501 nm
Filter thread:2"
Socket material:aluminum
Low profile filter cell:height only 6 mm
Substrate thickness:2 mm
- 1 filter in plastic box


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Reviews

Written by Jens Hinrichsen
on 2019-10-03

"Top O-III Filter, meine erste Wahl für Nebel, die in dieser Linie leuchten, denn das Bild ist sehr kontrastreich. Getestet unter gutem dunklen Himmel auf La Palma und in den Alpen."

Written by Marcel Müller-Goldkuhle
on 2017-09-03

"Deutliche Kontraststeigerung, Objekte wie Schleiernebel oder Sichelnebel erscheinen in ganz neuem Licht. "

Written by Dirk Fahrendholz
on 2016-10-04

"Hochwertiger Schmalbandfilter für den optischen Einsatz zum Auffinden von Nebelregionen."