Baader 2" Diamond Steeltrack Focuser for Refractors (BDS-RT)

2" BDS-RT Baader Diamond Steeltrack® Focuser

Baader Planetarium's 2" Refractor Diamond Steeltrack Focuser gives refractors a full 3" (76mm) of velvety smooth focusing travel. Easily adaptable to popular refractors.

• Overall length fully retracted 80mm (backfocus length).
• Drawtube is fully internally baffled and blackened to eliminate off-axis stray light.
• 72mm dovetail receiver permits 360degree rotation of focuser with single-screw locking.
• Optional adapters available to fit a variety of other refractors.

All Baader Diamond Steeltrack (BDS) Focusers have the following specifications:

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 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 Steeldrive motorblock onto Diamond-NT-Steeltracks for newtonian telescopes
• 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

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

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

Technical Specifications

MANUFACTURER	Baader Planetarium
SKU (#)	2957210
WEIGHT (NETTO)	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

In the Box

• 2" Diamond Steeltrack Focuser for Refractors

Warranty & Manuals

2-Year Warranty