2" BDS-SC Baader Diamond Steeltrack® Focuser

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2" BDS-SC Baader Diamond Steeltrack® Focuser

# 2957220

€ 316.81 Price excl. German VAT tax (16%): € 273.11

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  • Baader Diamond Steeltrack® (BDS-SC) for Schmidt-Cassegrains (EdgeHD) with 30 mm focus travel
  • Minimum height (as supplied – incl. 2" clamp): 93 mm
  • Minimum height (with optional S58 direct-thread adapters): 80 mm
  • Focuser weight (as supplied – incl. 2" Klemme): 1.040 g (36.7 oz)
  • Includes 2" and 3.3" adapter to fit all C14/C11/C9¼/C8/C6/ OTA’s

Product Questions

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Please, where in this focuser should my f/6.3 Celestron focal reducer (CFR) go? Currently, my imaging train would be:
C11 --- (¿CFR?) --- BDS-SC --- (¿CRF?) --- ASI174

Question by: Martin on May 25, 2017 10:41:00 AM | 1 Answer(s)
Hi, I would like to know if the 2" BDS-SC Baader Diamond Steeltrack® Focuser fits to my NexStar SE SCT 6".Best Regards Fermín
Question by: FERMIN GOMEZ on Feb 3, 2019 12:35:00 AM | 1 Answer(s)
Do you think that 2" BDS-SC Focuser can replace the Zero Image Shift Microfocuser on 10" LX-200-ACF (GPS + AutostarII / Dated 2009) from Meade ? Or can you propose another solution with fine-focus mechanism, even it is in manual mode ? Thank you very much for your answer.
Question by: Manuel on May 12, 2018 10:14:00 PM | 1 Answer(s)
Do you know if we can use the BDS-SC with the Celestron Edge HD focal reducer for Edge HD 8"?
Question by: Stefan Broquet on Mar 24, 2017 12:20:00 PM | 1 Answer(s)
Can the Baader Diamond Steeltrack® (BDS-SC) Focuser for Schmidt–Cassegrains be used with Maksutov–Cassegrains (specifically Orion Optics (UK)'s OMC200 (https://www.orionoptics.co.uk/OMC/omc200maksutovca.html)? If so, I'll order the focuser straight away! Many thanks. – Peter Gill
Question by: Peter B. J. GILL on Nov 6, 2019 1:43:00 PM | 1 Answer(s)
In one of the questions above, you recommend placing the 0.63x reducer/corrector after the Steeltrack focuser. Which adapter would I need to thread the reducer/corrector directly to the Steeltrack focuser?
Question by: Darren on Mar 31, 2019 8:06:00 AM | 1 Answer(s)
Does the S58 dovetail mean that the steeltrack effectively has a rotator built in? I mean, if I use an S58 dovetail to M48 adapter for example to thread into my imaging train, I could then clamp it down onto the steeltrack in any chosen orientation of the camera?
Question by: Paul B. on Mar 11, 2019 9:26:00 PM | 1 Answer(s)
I have a BDS-SC/HD which I am using on a Meade LX-85 6" ACF with a Pentax KP camera attached via a T2 adapter. It works very well, thank you.

My question is, will your UHC-S / L-Booster-Filter 2" fit internally in the BDS-SC/HD? If not, do you have another method to use the UHC-S filter with the setup mentioned above?
Question by: Mike Herdering on Sep 2, 2020 12:44:00 AM | 1 Answer(s)
What screws on the steeltrack sc focuser allow for the adjustment of rotation of the focuser after installation . Are these the screws marked as number 3 on the instruction manual. Thank you.
Question by: Daniel on Aug 3, 2019 2:31:00 AM | 1 Answer(s)
Do you have adapters for Takahashi Mewlon or CN212?
Thanks in advance.
Question by: Eric on Sep 8, 2017 7:44:00 AM | 1 Answer(s)
Can I confirm that the focuser can be easily rotated to frame a desired field of view? The "specifications" section indicates that it is rotatable, but I see nothing in the instruction manual to indicate how this is achieved.
Question by: Darren on Mar 22, 2019 1:54:00 PM | 1 Answer(s)
I would like to know 1) if and how I can fit this focuser to my Skywatcher MAK127 (bought ~2 years ago) ; do I need some kind of adapter ? will the original focusing knob at the visual back of the MAK still be accessible ?
2) same question for Skywatcher MAK180
Thanks a lot !
Question by: Frank on Sep 3, 2017 3:25:00 PM | 1 Answer(s)


Baader SC Diamond Steeltrack on Celestron Mount
Application example of BDS-SC Diamond Steeltrack®

General Specifications for all Baader Diamond Steeltrack® (BDS) focusers:

Drive system

  • True diamonds form a micro-geared high precision drive system never accomplished before
  • In comparison to conventional crayford or rack & pinion drives, this micro-geared movement has zero backlash, zero cogging, and zero flexure
  • Diamond Steeltrack® 2" focusers lift a payload of 6kg (13 lbs) straight up, without slipping, without excessive bearing preload (bearing preload can be increased further if necessary)
  • Bearing system utilizes unbreakable Instrument Grade Roller-Bearings instead of simpler Ball Bearings - handles higher loads with greater rigidity and accuracy. No Teflon-pads anywhere
  • 1:10 Stainless Steel fine-focus mechanism, ready for attachment of the optional Diamond Steeldrive temperature-compensating motor drive system
  • Detachable drive block assembly is reversible for right hand or left hand fine-focus operation and for attaching the Diamond Steeldrive motor block
  • Shortest possible mechanical design achieves optimum balance between focuser height (backfocus) and rigidity requirements
  • Zero shift locking knob to precisely stop any movement without affecting optical axis adjustment

Baader Diamond Steeltrack Adapters
Multiple Adapters available for shortest possible connection to most cameras / eyepieces
Multiple  Telescope-Adapters
Mounting of BDS-Adapters on the example of BDS-NT Diamond Steeltrack®

Clamping system

  • S58 Dovetail ring-clamp built into focusing tube for accepting optional T-2 / M48 / M68 and other S58 direct-thread adapters to enable direct thread connection of accessories and cameras without 2" clamp
  • 2" eyepiece clamp with hardened bronze clamp ring (length of clamp: 12.5mm / ½") included as standard
  • Optionally available 2" Baader Clicklock-clamp w. integrated S58 dovetail (added length: 16mm / 5/8")
  • Two auxiliary threads (M60x1 and M55x0,75) cut into the RT & NT focusing-tube for attachment of dedicated field flatteners or focal reducers/correctors

Baader SC Diamond Steeltrack
BDS-SC: all views
Imaging / Eyepiece projection
Imaging / eyepiece projection on the example of BDS-RT Diamond Steeltrack

Focusing Drawtube:

  • Each bearing individually adjustable for precise alignment of mechanical vs. optical axis
  • Ultra-hard subzero coated bearing races – precision milled and much harder than anodizing or stainless steel
  • Oversized 55mm inner clear diameter, to prevent vignetting, with anti-reflection knife-edge baffles

Additional Information

Manufacturer Baader Planetarium
SKU (#) 2957220
Weight (kg) 1.04
Focuser Travel 30 mm
Payload Capacity (kg) 6 kg
Inner Diameter / Clear Aperture (mm) 55
Shortest overall height (standard) 93 mm
Shortest overall height (w. opt. adapters) 80 mm
Reduction 1:10
Rotatable Yes
Finder base No
Motorized No, but can be upgraded
Special Features True diamonds form a micro-geared high precision drive system
Included Accessories Includes adapter to fit all C14/C11/C9¼/C8/C6/C5 OTA’s
Inner Connection (lens sided) Thread, 2" (50,8mm), 3,3", UNC
Inner Connection (eyepiece/-camera-sided) Thread, Clamp, Dovetail ring clamp, M55, S58, 2" (50,8mm)
Optional Accessories Baader Steeldrive temperature compensating motor drive system
compatible telescopes Schmidt-Cassegrain
Focuser style Crayford
Focuser size 2 inch

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3 Item(s)

Peter 166/06/2019 16/06/201900:22
  • Rating:
Die perfekte Ergänzung zum Mark V Großfeld-Binokular
Da für ein Mark V Großfeld-Binokular an einem SC-Teleskop der 2“ Glaswegkorrektor 1,8x nötig ist, war ich auf der Suche nach einer Möglichkeit einen Focalreducer einzubinden um ein helleres Bild zu erhalten. Der Baader Diamond Steeltrack ermöglicht in Verbindung mit einem T-2 Zenitspiegel mit geringer optischer Länge auch einen 3,3“ Reducer zwischen Teleskop und Okularauszug zu verwenden ohne den fokussierbaren Bereich zu verlassen. Ich habe über den S58-ClickLock für den Baader Diamond Steeltrack den 2" Glaswegkorrektor 1,8x für Refraktoren und SC's angeschlossen, der dadurch vollständig im 2" BDS-SC Baader Diamond Steeltrack Okularauszug verschwindet. Hier ist auch noch genug Platz für einen 2“ Filter am Glaswegkorrektor. Mit dem Glaswegkorrektor ist ein T-2 Zenitspiegel verbunden, an dem das Mark V Großfeld-Binokular befestigt ist. Das Binokular wird sicher gehalten und lässt sich gut fokussieren.
  • Die Länge ist so gewählt, dass der Glaswegkorrektor 1,8x gerade hineinpasst und noch genug optische Länge zur Verfügung steht. Über die S58 Direktadapter lassen sich auch 2" Zenitspiegel bzw. Zenitprismen über den M68 Adapter ohne zusätzliche Optische Länge anschließen.
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Ingo 120/05/2019 01/05/201909:14
  • Rating:
für die Ewigkeit
Aufgerüstet wurde ein SC 9.25 mit Hinblick auf die Astrometrie/Photometrie. Mit dem OAZ umgeht man natürlich das bekannte Spiegelshifting und ermöglicht wirklich schweres Equimpent einzusetzen. Ich werde vermutlich nicht auf 6,5kg kommen, aber bei 3 kg hat man gute Reserven und vorallem einen sicheren Fokus im Zenit. Auch ein evtl. großer Hebel bei horizontnaher Beobachtung macht dem OAZ nichts aus. Was aus der Produktbeschreibung nicht hervorgeht, aber in der Bedienungsanleitung nachzulesen ist, sind die Gründe der Wartungsfreiheit und die Möglichkeiten der Justierung. Wenn man das gelesen hat wird einem klar, was für ein qualitativ hochwertiges und langlebiges Produkt man vor sich hat. Die Justiermöglichkeit bietet über die bereits perfekte werksseitige Justierung hinaus, dem (über)ambitionierten (Hobby)Astronomen auch noch die letzten "Hundertstel" rauszuholen. Für die visuelle Beobachtung überflüssig, für photographische Beobachtung im Highend eine Option.
  • Ausbaufähigkeit bzgl. Fokusierer, Tragfähigkeit, Verarbeitung
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Patrick 88/03/2017 30/03/201708:56
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Baader Diamond Steeltrack BDS-SC
I bought the BDS-SC to use with my C9.25 HD and I tested it on several occasions. I have to say it's an absolute joy to focus with the BDS. It runs very smoothly and allows very fine adjustments. It is big difference to the built-in focuser. The BDS allowed me to re-focus much quicker e.g. when switching to a barlow lens. I find it very convenient that it can be turned without unscrewing anything.

The BDS is a very solid build and holds also long imaging trains firmly attached. Both 2" and 3.3" threads fit to the C9.25 HD with or without adapter that came with the telescope, respectively. There are minor imperfections on the inner threads assumingly from clamp attachment during electroplating.

All in all I am very happy with the BDS and I think it's well worth the price.
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