Products

Conforms to the Sloan Digital Sky Survey (SDSS) photometric system Includes five filters: u' (ultraviolet), g' (green), r' (red), i' (infrared), a...

Conforms to the SLOAN/SDSS y' photometric standard Designed for scientific magnitude measurements Ideal for variable star and exoplanet transit re...

Photometric filter for the SLOAN/SDSS z-s' bandpass Conforms to the Sloan Digital Sky Survey photometric system standard Enables calibrated, scien...

Standardized UBVRI Bessel passbands for scientific photometry Enables measurement of variable stars, asteroids, and exoplanet transits Precision p...

Conforms to the standardized Johnson-Cousins/Bessel B-band passband Designed for research-grade scientific photometry Advanced anti-reflection and...

Conforms to the Johnson-Cousins UBVRI Photometric System Optimized for the Bessel I-Band (Infrared) Homofocal Design for Parfocal Operation with o...

Conforms to the Johnson-Cousins-Bessel R-Band Photometric Standard Engineered for Scientific Photometry and Data Collection Plane-Parallel Substra...

Conforms to the Johnson-Cousins/Bessel U-Band Photometric Standard Designed for Scientific Photometry of Variable Stars and Stellar Classification...

Bessel V-Band Standard: Precisely conforms to the internationally recognized Johnson-Cousins-Bessel V-band for consistent, scientific-grade magni...

Enables Use of 30-42mm Eyepieces in Baader Maxbright Binoviewers Solves Image Merging Failures with Long Focal Length Designs Extends Eyepiece Bar...

Adapts Zeiss Harpia spotting scopes for 1.25" eyepieces Enables use of high-quality astronomical eyepieces Bayonet mount stays on the eyepiece for...

Securely holds standard 1.25" filters Integrates directly into T-2 (M42x0.75) threaded systems Prevents accessory tilt common with drop-in filter ...

Connects T-2 accessories to a 1.25" focuser or visual back Modern 3mm T-2 thread depth for cameras with short optical height Safety-Kerfs give ext...

BBHS® Broad Band Hard Silver coating for maximum spectral range and color fidelity User-collimatable mirror in a CNC-machined aluminum housing The...

Adapts Schmidt-Cassegrain telescopes to use 2-inch accessories Internal 2-inch filter thread for optical tube protection Securely holds heavy diag...

Adds 60mm of optical length to the light path Securely clamps 2-inch eyepieces and accessories Integrated dual 2-inch filter holder Connects to st...

Converts the Hyperion® Zoom MK III eyepiece to a native 2" barrel Joins the eyepiece body with the kit's M45 male thread Eliminates the need for a...

Connects M54 threaded accessories to any 2" focuser or adapter M54 external (male) thread provides a wide, secure connection Features Baader's Saf...

3" Losmandy D-Style Profile 250mm (10") Length Ideal for Custom Telescope Builds Black Anodized Finish Description FAQ Specifications In the Bo...

3.5 / 4nm Ultra-Narrow H-alpha, O-III & S-II Bandpasses Pre-Shifted for Fast f/3 "Ultra-Highspeed" Optical Systems CMOS-Optimized with Anti-Re...

Enables secure, rotation-proof mounting of heavy accessories Designed for the 3.5" Hedrick Focuser on PlaneWave CDK 14" to 24" telescopes Allows f...

Enables rapid exchange of heavy instrument packages Works with the Baader 3.5" Quick Changer (#1324000) on the 3.5" Hedrick Focuser Compatible wit...

Adapts C-Mount (1" x 32 TPI) threads to the T-2 (M42x0.75) system Integrates a factory-mounted UV/IR Cut Filter Provides a critical link for guide...

Connects devices with a 3" internal thread to an M68 external thread Designed specifically for FLI filter wheels and SBIG STX series cameras Enabl...