Home/Filters/Photometric-Filters/Baader SLOAN/SDSS r'-Filter – photometric

Baader SLOAN/SDSS r'-Filter – photometric

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€149.00

Price excl. German VAT tax (19%): € 125.21

Filter size:None

Baader SLOAN-r' Bandpass Filter, suitable from f/15 to f/1.8
SLOAN/SDSS (ugriz’) photometric filter with transmission according to SLOAN-specification
Manufactured with most advanced ion beam coating technology / Daylight-Proof
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
Equally suitable for modern CMOS cameras as well as for older CCD camera technologies

Stackable Baader Filter-Box included

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.

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This new generation of Baader Filters features:

CMOS-optimierte Baader Filter

Reflex-Blocker^™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
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 telescope-sided black 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 Photometric Filters: Dark nebulae appear in a new light 04. December 2023 Yannick Akar

Amateur Astronomers take a look through the Cloud Cover of Venus with our SLOAN Filters 09. June 2022 Michael Risch

First Light with Baader SDSS filters by S. Ziegenbalg 23. February 2022 Team Baader Planetarium

Now available: New Baader UBVRI and SLOAN/SDSS (ugriz’) Photometric Filters 12. October 2021 Team Baader Planetarium

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

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Baader SLOAN/SDSS r'-Filter – photometric

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Customer Reviews

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Top customer reviews

Zlatko Orbanic

2025-10-27 13:11:54

I recommend this product

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SLOAN/SDSS r'-Filter – photometric

I chose this filter because I do a lot of astrometry and photometry on various objects such as asteroids, comets, and various transits of extrasolar planets, which is why I chose Baader products! I'm very satisfied with your products and continue to buy other filters that I need for my deep-sky research!

I like how the filters are made and the packaging is very rigid and well made!

I have nothing to write on this subject.

FAQ - Team Baader / November 25, 20221 Answer

For (much) larger DSLR lens sizes up to 100 mm aperture you might consider our 100x100x3 mm square photometric SLOAN-Filters: https://www.baader-planetarium.com/en/filters/photometric-filters.html. Especially for work in UV, the SLOAN-U filter (#2961707U https://www.baader-planetarium.com/en/filters/photometric-filters/sloansdss-u%27-filter-%E2%80%93-photometrisch.html#425=1695) is a viable alternative to our time proven U-Venus-filters (https://www.baader-planetarium.com/en/baader-u-filter-(venus-and-uv---350nm).html") - offering a very similar transmission window but up to 100 mm sq size: https://www.baader-planetarium.com/en/sloansdss-u%27-filter-%E2%80%93-photometrisch.html There even is a clever way to hold that huge size filter in front of most any DSLR-lens by obtaining this holder and doing a minimal change that converts this holder from accepting two filters of 2 mm thickness into accepting just one filter w. 3 mm thickness - with a mere screwdriver (sorry for the german Amazon-link): https://www.amazon.de/dp/B07FL3YNHB?pd_rd_i=B08KVZ8VWT&pf_rd_p=5f9972c1-184d-4e29-822a-e867654f66c0&pf_rd_r=5T5PNXXSSA4JVTRSN3QK&pd_rd_wg=6HR08&pd_rd_w=dE1wF&pd_rd_r=e8cc1e1b-747d-4193-acdf-981d7f2e81e4&th=1
Baader Web Team / November 25, 2022
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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
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