Home/Filters/(Ultra-) Narrowband / Highspeed/Baader O-III Ultra-Narrowband-Filters (4nm) – CMOS-optimized

Baader O-III Ultra-Narrowband-Filters (4nm) – CMOS-optimized

3 Reviews

1 Answered Question

Please choose version to see SKU number

Price from

€262.00

Price excl. German VAT tax (19%): € 220.17

Which side should face the telescope?

Filter size:None

Baader O-III Ultra-Narrowband Filter – Premium Grade
4 nm FWHM, recommended for optical systems from > f/3.4
For highest contrast even at strongest light pollution, minimizes star size, emphasizes finest nebula detail – indispensable under Bortle 9/8/7/(6) skies
Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

Baader Narrowband-/Highspeed Filter Selector

To make it easy for you in the future to decide which kind of Highspeed (or Narrowband) filter you need for your telescope, please check our Filter-Selector, that provides you the correct individual graph based on your entriest, in which you can find the perfect filter for your telescope by f/ration and central obstruction.

Create your own FILTER-LIBRARY:

This filter - except for size 100x100x3 mm - (in case of a filter set: each individual filter) comes in a Filterbox for all filters up to 50x50mm, stackable on all sides (#2459253 , € 7,- ) , to create your individual "filter-library", offering a secure place and immediate access for all Baader-filters. Putting this "library" into a carry bag will allow you to have all your loose filters stored safely in the field and be handy always.

This new generation of Baader CMOS-filters features:

CMOS-optimized Baader Filters

Increased contrast

Ever more narrow passbands

Reflex-Blocker^™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics

FWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s/n ratio

Identical filter thickness to existing standards, with utmost care for parfocality

Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter

Each filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)

Life-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment

Further information, test reviews and image results can be found here:

Baader CMOS Optimized Filters: Unleashing the Full Potential of Astrophotography 07. August 2023 Ian Aiken

New CMOS-optimized Baader Filters 08. May 2021 Team Baader Planetarium

Don´t be misled.

These all new CMOS-optimized filters work magnificently with all existing digital camera technologies, be it CMOS or CCD. However – an owner of CCD-camera-technology will still find our previous, extremely affordable, narrowband filter technology to be fully apt for excellent imaging. But: "the Better always is enemy to the Good".

Baader O-III Ultra-Narrowband-Filters (4nm) – CMOS-optimized

Technical data not yet specified
Please choose product variant from dropdown above to see technical data of your chosen product

Customer Reviews

5.0

reviews

Tell us what you think about this item!

Top customer reviews

Anssi

2023-08-10 08:51:58

Rating

Great filter

Good transmission from corner to corner with my f/3.6 wide field configuration at least on an 28mm * 22mm sensor. The filter diameter also generously covers entire chip. This filter works very well also on my color CMOS camera as both the blue and green pixels have great QE at 500 nm. This is 3/4 of all the pixels.

The narrow bandwidth works very well for urban and rural skies

F. Meschia

2021-11-19 06:23:15

Rating

This is Baader LifeCoat!

I purchased one of the new CMOS-optimized, Ultra-Narrowband 4nm OIII filters, in 31mm size (item no. 2961401). After some disappointing results due to flats that would overcorrect my lights, I found that my filter has a dark band that correlates with the position of overcorrected portions of my subs. Baader recommended me to obtain a replacement filter, and to return my filter so that they can examine it. And now I just wanted to let you know that, following after this message my dealer has instructed me to send my filter to them, and provided me with a replacement filter, free of any charge The new filter doesn't show any visual defect, and produces very fine images. The support from Baader Planetarium, as well as my dealer, in this matter has been amazingly good and I greatly appreciate that Attached you can see my first test HOO image, produced with my Baader 3.5nm H-alpha, and with the new 4nm O-III

Frank Küber

2021-07-23 11:41:01

Rating

O-III ULTRA-NARROWBAND-FILTER (4NM) - 36mm (ungefasst)

First Light (18.7 - 22.7.2021, zunehmender Mond (55% - 98%), Standort Hochtaunus mit div. Straßenbeleuchtung): Im Gegensatz zu den Vorgängermodellen (7nm, 36mm ungefasst) und 2" gefasst (4,5nm und 7nm) im gleichen Setup (1200mm F8 APM LZOS und 82mm Riccardi Flattner, Kamera ZWO ASI 2600) keinerlei Reflexe oder Sternhalos. Definitiv eine Verbesserung. Der entsprechende Ha Filter zeigt ebenfalls eine ausgezeichnete Performance. Den SII Filter habe ich noch nicht getestet.

Waqas Ahmad / October 10, 20161 Answer

Our largest cell mounted filters measure 2" (50.8mm) in mechanical diameter (having a metric thread of M48). The optical clear aperture is 46 mm. In order to ease the adaptation of our 2" filters onto most camera lenses, we do produce a 2" filter-holder, to convert from the ASTRO-2" Standard (M48) into a more common photo-standard of SP54 mm ("SP"means this is not a metric thread). For adapting any cell mounted Baader 2 inch Filter onto a camera lens with 52mm front filter thread you will need: #2408166 Baader DSLR 2" Filter-Holder M48 / SP54: https://www.baader-planetarium.com/en/baader-dslr-2%22-filter-holder-m48sp54.html #2958052 Baader Lens-Adapter-Ring SP54 / M52: https://www.baader-planetarium.com/en/baader-hyperion-dt-ring-sp54m52-for-dtadapter-iiandiii-and-hyperion-eyepieces.html Based on the SP54 thread, we offer many more adapters for various camera threads, our so-called Hyperion DT-rings. https://www.baader-planetarium.com/en/catalogsearch/result/?q=sp54
Baader Web Team / October 11, 2016
53
6

Service & Company

Service & Company

Baader O-III Ultra-Narrowband-Filters (4nm) – CMOS-optimized

Create your own FILTER-LIBRARY:

This new generation of Baader CMOS-filters features:

Further information, test reviews and image results can be found here:

Don´t be misled.

Baader O-III Ultra-Narrowband-Filters (4nm) – CMOS-optimized

Customer Reviews

Top customer reviews

COMPANY

BLOG POSTS

ORDERS

OTHER SITES

GET IN TOUCH

Service & Company

Service & Company

Baader O-III Ultra-Narrowband-Filters (4nm) – CMOS-optimized

Create your own FILTER-LIBRARY:

This new generation of Baader CMOS-filters features:

Further information, test reviews and image results can be found here:

Don´t be misled.

Baader O-III Ultra-Narrowband-Filters (4nm) – CMOS-optimized

Recommended Blogposts

Baader CMOS Optimized Filters: Unleashing the Full Potential of Astrophotography

The new "f/2" narrowband filters from Baader in use.

Review: visual usage of the Baader OIII 6.5nm CMOS Filter

Preshift and further information concerning Baader CMOS Filters

A report on visual use of the Baader H-Beta 5.5nm CMOS filter

New CMOS-optimized Baader Filters

HALOS – viewed without prejudice

Baader Highspeed Filters – and why different f/ratios require special filters

APF-R : Absolute Point of Focus

Features of Baader Narrowband Filters

Information about Baader Filters and Filtercells

Customer Reviews

Top customer reviews