







See Options
1 Year
$47.99
2 Year
$83.99
3 Year
$104.99
Need help? Ask our experts.
Review Summary
2021-09-23T16:01:21
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.
Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
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
Browse our FAQ
1.57" (40mm)
13.2 lb (6kg)
2.17" (55mm)
Standard: 2.48" (63mm)
With Opt. Adapters: 1.97" (50mm)
1:10
Yes
No
No, but can be upgraded
True diamonds form a micro-geared high precision drive system
Dovetail ring, S88
Thread, Clamp, Dovetail ring clamp, M55, S58, 2" (50,8mm) (eyepiece/-Camera-Sided)
Newton
Crayford
2" (50.80mm)
2.29 lb (1.04kg)
4047825031990
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.