Manufacturer: Baader
Product number: BA2957230

EUR 345,00


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  • On stock




rating: 5.0 of 5
  • Details..
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  • In the box..
2" BDS-NT Diamond Steeltrack® Focuser
for Newtonian telescopes

The completely new construction combines extreme durability and precision with high payload!

This focusers for Newtonians has, like the one for refractors, two auxiliary threads (M60x1 and M55x0,75) for attachment of dedicated field flatteners or focal reducers/correctors.


Additionally, the Baader NT Diamond Steeltrack allows for the mounting of miscellaneous adapters at the eyepiece side.

To a larger image, please use the right (or middle) mouse key.



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 6 kg (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 55 mm clear inner diameter, to prevent vignetting, with anti-reflection knife-edge baffles


Clamping System
S58 dovetail ring-clamp built into focusing tube for accepting optional T2 / 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: 12.5 mm / ½") included as standard
Optionally available 2" Baader Clicklock-clamp w. integrated S58 dovetail (added length: 16 mm / 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



BDS-NT Mounting instructions
on an 8" Newtonian telescope in nine simple steps

1. Remove current Focuser
2. Remove screws and spacers of BDS-NT Diamond Steeltrack®
3. Loosely mount new focuser using the old holes
4. Remove focuser from VersaBase by opening 8x hex screws
5. Use old screws and nuts for centering VersaBase plate
6. Drill four new 5 mm holes (straight to tube center) in the middle of each elongated cutout
7. Attach radial sliding bolts, fasten from inside out with hex tool as shown
8. Remove old screws. VersaBase plate is now adjustable for your needs
9. Attach Diamond Steeltrack® in prefered position, tighten 8x hex-screws

Using NT-strip-shims of Baader VersaBase for different tube sizes


The mounting instruction above was made on a 8" Newtonian - for these instruments the strip shims (adjustment spacers) are not needed. For other tube diameters, please use the strip shims between the telescope tube and the Baader VersaBase (the base of our BDS-NT Diamond Steeltrack®). You gain up to 4 mm height. Please note the self-explanatory gif to the left.

To a larger image, please use the right (or middle) mouse key.


Drawtube Travel:40 mm
Payload:6 kg
Fine focusing:1/10
Special feature:Micro-geared drive system made of diamonds
Bearing:Roller-Bearing, 10 mm width, adjustable
Clear aperture:55 mm
Telescope side connection:supplied Baader VersaBase for most tube diameters, optional flat base plate
Focus side clamping:S58 dovetail ring-clamp for accepting of S58 direct-thread adapters
Focus side eyepiece clamp (icluded):2" eyepiece clamp with hardened bronze clamp ring (length of clamp 12.5mm)
Auxiliary threads:M60x1 and M55x0.75 for attachment of dedicated field flatteners or focal reducers/correctors
Minimal total height (as delivered – incl. 2" clamp):63 mm
Minimal total height (with optional S58 direct-thread adapters):50 mm
Total weight (incl. 2" clamp):1000 g
Basic hole spacing lengthwise to tube:65 - 94.5 mm variablel
Base hole spacing transverse to tube:101 mm measured directly from hole to hole
Focuser with VersaBase
2" Eyepiece clamp
Radial sliding bolts
Strip-shims for smaller tube diameters
Screws



Recommended accessories




Adaptors

BA2957231

Baader Flat Base Plate for BDS-NT (Diamond Steeltrack for Newtonians)

Baader Flat Base Plate for BDS-NT (Diamond Steeltrack for Newtonians)

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BA2957202

Baader T2 Adapter for 2" Diamond Steeltrack

Baader T2 Adapter for 2" Diamond Steeltrack

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BA2957204

Baader M48 Adapter for 2" Diamond Steeltrack

Baader M48 Adapter for 2" Diamond Steeltrack

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BA2957206

Baader M68 Adapter for 2" Diamond Steeltrack

Baader M68 Adapter for 2" Diamond Steeltrack

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General Accessories

BA2956258

Baader 2" Clicklock Clamp for Diamond Steeltrack focusers

Baader 2" Clicklock Clamp for Diamond Steeltrack focusers

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BA2957165

Baader Steeldrive II Motor Focuser with Controll Box

Baader Steeldrive II Motor Focuser with Controll Box

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AF3-BAST

TS Motor Focus System for Baader Diamond Steeltrack Focusers

TS Motor Focus System for Baader Diamond Steeltrack Focusers

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EAF-Steeltrack

Wega Adapter Kit for ZWO EAF Motor Focus to Baader Diamond Steeltrack Focusers

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Reviews

Written by Ladislav Rauser
on 2023-08-30

"Velmi kvalitní, precizní."

Written by Bernhard Wilhelm
on 2023-01-04

"Gute Qualität hat ihren Preis! aber man ist dann aber auch nicht enttäuscht. Der Okularauszug von Baader ist mit den Standardauszügen von Skywatcher nicht vergleichbar. Das ist mal eine ganz andere Hausnummer. Solide gebaut, Präzision in Führung und Halt der Okulare und oder anderem Zubehör. Absolut empfehlenswert! "

Written by Stephane Moinard
on 2022-11-12

"Very good quality, it´s worth its price. Mounting very easy."

Written by Hubert Hautecler
on 2022-10-31

"Works very well. Smooth and no backlash"

Written by Gabriel Paunescu
on 2022-10-06

"Very good and precise this focuser. I fit it on my TS-photon 8"" F4. The only small issue is to make the holes. I should knew from begining that the base from old focuser can be used to proper fit and center the new base."

Written by Mark Dunnett
on 2022-07-01

"Solid, robust and silky smooth. I expect this focuser will be more serviceable than my previous Moonlite unit. Mark."

Written by Alexandru Canpan
on 2020-07-09

"The focuser is a nice piece of kit, it is very well designed and engineered, extremely tight tolerances and zero backlash, zero flex as advertised, i have to strengthen my OTA now because the focuser has zero flex but the tube itself flexes a bit, it will easily carry 4-5kg no sweat 😉, large focuser tube makes it even easier to collimate the Telescope and as I have a full frame camera I noticed less vignetting , basically the vignette from the focuser tube has been eliminated, now the weak link is the coma corrector but the vignettes is really negligible, easily done in post. If you need one of the best focusers for your newtonian telescope out there, this is certainly it, if budget is unlimited go for a Feather Touch, otherwise get the Baader. Clear skies everybody!"

Written by Guido Wollenhaupt
on 2020-04-30

"Sehr gute Qualität, wertig"

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