2" BDS-RT Baader Diamond Steeltrack Focuser

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2" BDS-RT Baader Diamond Steeltrack Focuser

# 2957210

€ 320.00 Price excl. German VAT tax (19%): € 268.91

In Stock  


  • Baader Diamond Steeltrack (BDS-RT) for Refractors with 80 mm focus travel
  • Minimum height (as supplied – incl. 2" clamp): 78 mm
  • Minimum height (with optional S58 direct-thread adapters): 65 mm
  • Focuser weight (as supplied – incl. 2" Klemme): 1.160 g (40.9 oz)
  • Adapters available or under development to fit a wide variety of refractor telescopes

Testreview on Stargazerslounge.com

Product Questions

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Is there an RT adapter to fit a Steeltrack focuser to a Skywatcher EQUINOX 80 please?
Thanks, Paul
Question by: Paul Chamberlain on May 24, 2017 9:35:00 PM | 1 Answer(s)
Can I fit this focuser to takahashi tsa 120 with 125x1mm thread?
I can not find reduction ring for my scope. Thanks.
Question by: Piotr on Sep 2, 2018 1:24:00 PM | 1 Answer(s)
Is there an adapter for the Bresser Messier AR 127L with Hexafoc to mount the BDS RT?
Question by: Rob Hughes on Oct 19, 2018 11:07:00 AM | 1 Answer(s)
I am the owner of a Vizen ED103SWT refractor.
I would like to change the focuser with your steeltrack RT, is it possible? Wich kind of adapter is useful for?
Regards. Giorgio
Question by: Giorgio on Nov 18, 2017 7:09:00 PM | 1 Answer(s)
Do you manufacture a Steeltrack to fit onto a flat plate of larger telescopes? I need one to fit a 20" RC telescope that has a machined flat back-plate that fits flush onto the telescope and is then drilled to accommodate different equipment. Ideally we would like a Steeltrack attached to a flat plate with mounting holes that we can then attach to the telescope back-plate by four screws.
Question by: Ian Hargraves on Jun 7, 2018 5:00:00 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)
Is there an adapter which will allow me to attach the Diamond Steeltrack to a venerable Vixen 90 Fluorite? The scope I love but the focuser was always poor and now terrible!
Question by: Philip on May 12, 2017 7:43:00 PM | 1 Answer(s)
Do you have an RT Adapter with a female 82mm x 1 connection on the OTA side please? It is to fit a TS-Optics PHOTOLINE 80 mm f/7 FPL53 Apo scope (Model NUmber TSAPO80F7).
Thanks and regards
Question by: Dave Jones on Mar 21, 2018 10:02:00 AM | 1 Answer(s)


Baader RT Diamond Steeltrack on Omni XLT
Application example of BDS-SC Diamond Steeltrack
Baader RT Diamond Steeltrack with finder base and holder
The BDS-RT allows mounting of a finder base and holder (example: MQR-III #2457020)

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 RT Diamond Steeltrack
BDS-RT: 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 (#) 2957210
Weight (kg) 1.04
Focuser Travel 80 mm
Payload Capacity (kg) 6 kg
Inner Diameter / Clear Aperture (mm) 55
Shortest overall height (standard) 78 mm
Shortest overall height (w. opt. adapters) 65 mm
Reduction 1:10
Rotatable Yes
Finder base Yes
Motorized No, but can be upgraded
Special Features True diamonds form a micro-geared high precision drive system
Included Accessories Adapters available or under development to fit a wide variety of refractor telescopes
Inner Connection (lens sided) Thread, M60
Outer Connection (lens sided) Thread, Dovetail ring, M68 x 1, S88
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 Refractors
Focuser style Crayford
Focuser size 2 inch

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