Top Rated Gear

Baader Planetarium BDS-SC 2" Diamond Steeltrack Focuser for Schmidt-Cassegrain and EdgeHD Telescopes with 30mm Focus Travel

SKU: AA2957220 MFR: BDS-SC
Earn VIP Reward Points

Key Features

  • Achieve pinpoint focus with this Baader Planetarium 2" telescope focuser for crisp, clear views.
  • Enjoy smooth, precise adjustments with the Diamond Steeltrack, perfect for astrophotography sessions.
  • Enhance your Schmidt-Cassegrain telescope with this robust focuser, supporting payloads up to 13.23lbs.
  • The 1:10 reduction ratio ensures fine-tuning capabilities, ideal for high-magnification observations.
  • Customize your setup; this versatile telescope accessory adapts to multiple connection types for flexibility.
  • Experience stable and vibration-free focusing, essential for capturing stunning celestial images with ease.
See More Product Details
FREE 2-Day 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 : Will this work with a 8" Edge HD?
Phillip S : Will this fit on a Celestron C11?
RICHARD P : Can you attach a ZWO EAF to this? Thanks.JEREMIAH J : Yes, it's what I use. Works great.

Reviews about this item

Review Summary

2025-05-04T09:44:07

Rated 4 out of 5

Poor quality control

Called Bob Luffel, the US rep for Baader, because of very rough operation when moving the focuser tube in and out just after I unboxed it. He suggested loosening the grub screw holding the gold fine focus knob very slightly away from the black coarse knob. Easy adjustment solved the issue. Works very well, smooth as can be. 4stars for poor quality control from factory, otherwise 5 for a fine product. Can't wait to install on my new Celestron 9.25 Edge.

THOMAS C.

2023-04-27T09:04:28

Rated 5 out of 5

Excellent focuser

Nice product. Easy to instal.

MICHAEL C.

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-SC Specifications

  • Focuser Travel

    30mm (1.18")

  • Payload Capacity

    6kg (13.23lbs)

  • Shortest Overall Height

    Standard: 93mm (3.66")
    w. Opt. Adapters: 80mm (3.15")

  • Reduction

    1:10

  • Rotatable

    Yes

  • Finder Base

    No

  • Inner Diameter / Clear Aperture

    55mm (2.17")

  • Special Functions

    True diamonds form a micro-geared high precision drive system

  • Inner Connection (lens Sided)

    Thread, 2", 3, 3", UNC

  • Inner Connection (eyepiece Sided)

    Thread, Clamp, Dovetail ring clamp, M55, S58, 2"

  • Compatible Telescopes

    Schmidt-Cassegrain

  • Focuser Style

    Crayford

  • Size

    2" (50.80mm)

  • Weight

    1.30kg (2.87lbs)

  • UPC Code

    4047825031983

About Baader Planetarium BDS-SC

FEATURED REVIEWS

Excellent focuser

By MICHAEL C.

Nice product. Easy to instal.

Where precision and durability meet, the BDS-SC 2" Diamond Steeltrack Focuser is a high-quality, innovative accessory designed specifically for Schmidt-Cassegrain and EdgeHD Telescopes. This stylish, user-friendly focuser boasts a 30mm focus travel, ensuring smooth and precise focusing for your astronomical observations.

The BDS-SC 2" Diamond Steeltrack Focuser is equipped with a true diamond micro-geared high precision drive system, a first of its kind. This system offers zero backlash, zero cogging, and zero flexure, outperforming conventional crayford or rack & pinion drives. The focuser can lift a payload of 6kg (13 lbs) straight up without slipping or excessive bearing preload, thanks to its robust bearing system that utilizes unbreakable Instrument Grade Roller-Bearings instead of simpler ball bearings. This ensures higher load handling with greater rigidity and accuracy.

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

The BDS-SC 2" Diamond Steeltrack Focuser is designed with a short mechanical structure to achieve the perfect balance between focuser height (backfocus) and rigidity requirements. It also includes a zero shift locking knob to precisely stop any movement without affecting optical axis adjustment.

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

The focusing drawtube of the BDS-SC 2" Diamond Steeltrack Focuser is adjustable for precise alignment of mechanical vs. optical axis. It features ultra-hard subzero coated bearing races that are precision milled and much harder than anodizing or stainless steel. The oversized 55mm inner clear diameter prevents vignetting, and the anti-reflection knife-edge baffles ensure optimal performance.

In summary, the BDS-SC 2" Diamond Steeltrack Focuser is a durable, high-quality, and user-friendly accessory for Schmidt-Cassegrain and EdgeHD Telescopes, designed to enhance your stargazing experience with its innovative features and superior performance.

Baader Planetarium BDS-SC Features

  • High-quality BDS-SC 2" Diamond Steeltrack Focuser designed for Schmidt-Cassegrain and EdgeHD Telescopes
  • Innovative, true diamond micro-geared high precision drive system for zero backlash, zero cogging, and zero flexure
  • Robust bearing system utilizing unbreakable Instrument Grade Roller-Bearings for greater load handling
  • Reversible, detachable drive block assembly for right or left hand fine-focus operation
  • Integrated S58 Dovetail ring-clamp for direct thread connection of accessories and cameras
  • Adjustable focusing drawtube with oversized 55mm inner clear diameter to prevent vignetting

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 Baader Planetarium 2" telescope focuser for crisp, clear views.
  • Enjoy smooth, precise adjustments with the Diamond Steeltrack, perfect for astrophotography sessions.
  • Enhance your Schmidt-Cassegrain telescope with this robust focuser, supporting payloads up to 13.23lbs.
  • The 1:10 reduction ratio ensures fine-tuning capabilities, ideal for high-magnification observations.
  • Customize your setup; this versatile telescope accessory adapts to multiple connection types for flexibility.
  • Experience stable and vibration-free focusing, essential for capturing stunning celestial images with ease.

What's in the box:

  • Baader Planetarium BDS-SC 2 " Diamond Steeltrack Focuser
  • Adapter
  • Baader Planetarium Warranty