Top Rated Gear

Baader Planetarium BDS-NT 2" Diamond Steeltrack Focuser for Newtonian Telescopes with 40mm Focus Travel

SKU: AA2957230 MFR: BDS-NT
Earn VIP Reward Points

Key Features

  • Achieve pinpoint focus with this 2" Diamond Steeltrack Newtonian telescope focuser.
  • Enjoy smooth, precise adjustments with the 1:10 reduction ratio for optimal clarity.
  • Upgrade your Newtonian telescope with this robust focuser, supporting up to 13.2 lbs.
  • Customize your setup with versatile inner connections for eyepieces & cameras.
  • Rotate the focuser for comfortable viewing angles during long astronomy sessions.
  • Experience superior precision with true diamonds forming a micro-geared drive system.
See More Product Details
Special Order?Estimated to Ship: 09/09/2025
Free Shipping

See Options

1

Protect your gear with Adorama Protect.* Learn more

1 Year

$47.99

2 Year

$83.99

3 Year

$104.99

Available to U.S. customers only.

Need help? Ask our experts.

Overview
Compare
Specs
Protection
Q&A

Questions & Answers

Shopper : Why Did You Choose This?RICHARD L : i heard good reviews and want to upgrade mine. I will let you know how it works for meForrest M : This Crayford focuser is by far the smoothest operating focuser going. I come from a precision manufacturing background and this thing is #1. You will not be dissapointed.MICHAEL N : To replace a sloppy ORION focuser

Reviews about this item

Review Summary

2021-09-23T16:01:21

Rated 5 out of 5

Dual speed diamond

Very nice focuser , just what I needed ! Not to hard to install and adjust . much easier to focus with my 65 year old eyes .????

Dan J.

Select a plan in the Add Protection section above and purchase with this product by clicking “Add to Cart”.

image-protection

TRUSTED PROTECTION PLANS, EXCEPTIONAL SERVICE.

Invest In Your Gear and Peace Of Mind!

Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.

Repair or Replacement

Repair or Replacement

If we can’t fix it, we’ll replace it at no additional cost.

Accidental Damage

Accidental Damage

Protect your product from drops, spills, and more.

Peace of Mind

Peace of Mind

Enjoy your gear without fear. We have you covered!

Failure Protection

Failure Protection

When regular use of your product over time results in mechanical or electrical failure.

Zero Deductible

Zero Deductible

We will never charge you a deductible after the purchase of a plan.

Customer-Focused Support

Customer-Focused Support

Our claims process is simple & easy and our customer service team is happy to help.

Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500

Baader Planetarium BDS-NT 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)

  • UPC Code

    4047825031990

About Baader Planetarium BDS-NT

FEATURED REVIEWS

Dual speed diamond

By Dan J.

Very nice focuser , just what I needed ! Not to hard to install and adjust . much easier to focus with my 65 year old eyes .????

From the renowned brand Baader Planetarium, the BDS-NT 2" Diamond Steeltrack Focuser for Newtonian Telescopes with 40mm Focus Travel is a durable and high-quality piece of astronomical equipment. This innovative focuser is designed with a true diamond micro-geared high precision drive system, a first in the industry. Unlike conventional crayford or rack & pinion drives, this advanced system eliminates backlash, cogging, and flexure, ensuring smooth and precise adjustments.

The Diamond Steeltrack 2" focuser is capable of lifting a payload of 6kg (13 lbs) vertically without slipping, thanks to its robust bearing system that uses unbreakable Instrument Grade Roller-Bearings. This superior system offers greater rigidity and accuracy, handling higher loads without the need for excessive bearing preload.

Equipped with a 1:10 Stainless Steel fine-focus mechanism, this focuser is ready for the optional Diamond Steeldrive temperature-compensating motor drive system. The drive block assembly is detachable and reversible, allowing for both right and left-hand fine-focus operation.

The BDS-NT 2" Diamond Steeltrack Focuser boasts the shortest possible mechanical design, striking the perfect balance between focuser height (backfocus) and rigidity requirements. It also features a zero shift locking knob, allowing you to stop any movement precisely without affecting the optical axis adjustment.

The focuser's clamping system includes an S58 Dovetail ring-clamp built into the focusing tube. This allows for the direct thread connection of accessories and cameras without a 2" clamp. The focuser also comes standard with a 2" eyepiece clamp with a hardened bronze clamp ring.

The focusing drawtube of the BDS-NT 2" Diamond Steeltrack Focuser is designed with individually adjustable bearings for precise alignment of mechanical vs. optical axis. The ultra-hard subzero coated bearing races are precision milled and significantly harder than anodizing or stainless steel. With an oversized 55mm inner clear diameter, this focuser prevents vignetting and includes anti-reflection knife-edge baffles for optimal performance.

In summary, the BDS-NT 2" Diamond Steeltrack Focuser for Newtonian Telescopes with 40mm Focus Travel is a user-friendly, stylish, and innovative solution for precise telescope focusing.

Baader Planetarium BDS-NT 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

Warranty Information

This product has a limited warranty of 24 months for parts and 24 months for labor.

Key Features

  • Achieve pinpoint focus with this 2" Diamond Steeltrack Newtonian telescope focuser.
  • Enjoy smooth, precise adjustments with the 1:10 reduction ratio for optimal clarity.
  • Upgrade your Newtonian telescope with this robust focuser, supporting up to 13.2 lbs.
  • Customize your setup with versatile inner connections for eyepieces & cameras.
  • Rotate the focuser for comfortable viewing angles during long astronomy sessions.
  • Experience superior precision with true diamonds forming a micro-geared drive system.

What's in the box:

  • BDS-NT 2 " Diamond Steeltrack Focuser
  • Baader Versabase