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

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  • 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)
Can i get one of these to fit a GT81 WIlliams Optics 2016 model?
Question by: Jon Chard on Jul 19, 2019 10:48:00 AM | 1 Answer(s)
I have a 2 inch Baader Diamond Steeltrack RT. Can you please confirm the function of the tension brake screw? When this screw is loosened, both the coarse and fine focus knobs can be turned. However when I tighten this screw, the coarse focus knob locks, but the fine focus knob can still be turned and the drawtube and the fine focus knob move as normal. Also when I tighten this screw, focus shifts. Is this correct behaviour, or should tightening this screw lock both knobs and the drawtube. This is not clear in the manual. Thanks.
Question by: Paul Evans on Jun 28, 2019 12:02:00 PM | 1 Answer(s)
I have a GSO RC 8" and I would like to replace the focuser.
What do I need? I am very confused what focuser and how does it attach to the ota.
Thank you.
Question by: Stephen Campton-Jones on Aug 18, 2019 12:26:00 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)
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 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)
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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Alexander 340/12/2019 07/12/201915:05
  • Rating:
Grossartiger Auszug
Habe heute nacht den Okularauszug zum ersten mal benutzt und war beeindruckt wie leicht und präzise der Fokus eingestellt werden kann. Durch die Übersetzung ist der Kraftaufwand nahezu nichtig! Somit auch kaum Störung beim Scharfstellen! Das ist eine wesentliche Investition gewesen.

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