Baader Planetarium BDS-NT 2" Diamond Steeltrack Focuser for Newtonian Telescopes

Description

Baader Planetarium BDS-NT 2" Diamond Steeltrack Focuser for Newtonian Telescopes with 40mm Focus Travel
SKU: AA2957230
Mfr. Part: BDS-NT
Item Includes
BDS-NT 2 " Diamond Steeltrack Focuser - Baader Versabase
Description
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
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 / 1/2") 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
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
Features
Baader Diamond Steeltrack (BDS-NT) for Newtonian telescopes with 40 mm focus travel
Minimum height (as supplied - include 2" clamp): 63 mm
Minimum height (with optional S58 direct-thread adapters): 50 mm
Focuser weight (as supplied - include 2" Klemme): 1 kg (35.25 oz)
Includes Baader Versabase, for perfect fit onto most tube diameters. Optional flat mounting base also available
Specifications
Focuser Travel
1.57" (40mm)
Payload Capacity
13.2 lb (6kg)
Inner Diameter / Clear Aperture
2.17" (55mm)
Shortest Overall Height
Standard: 2.48" (63mm)
With Opt. Adapters: 1.97" (50mm)
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
Outer Connection (lens Sided)
Dovetail ring, S88
Inner Connection
Thread, Clamp, Dovetail ring clamp, M55, S58, 2" (50,8mm) (eyepiece/-Camera-Sided)
Compatible Telescopes
Newton
Focuser Style
Crayford
Focuser Size
2" (50.80mm)
Weight
2.29 lb (1.04kg)
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