Torah im Derech Eretz: The Educational Philosophy of Rabbi Samson Raphael Hirsch

Astromania Barlow Lens 2x, 2 Inch 4 Element Fully Multi-Coated Metal High Power Premium Barlow Lens, Telescope Accessory with Internal Brass Ring to Use of Both 1.25 Inch and 2 Inch Telescope Eyepiece

Alstar Barlow Lens 2X, 2 Inch Barlow Lens with Multi Coated Broadband Green Film Compatible for 1.25 Inch & 2 Inch Telescope Eyepiece, FMC ED Glass Lense Telescope Accesories with Internal Brass Ring

Skyoptikst 2" 3X Apo Barlow Lens w/1.25" Adapter - Multi-Coated 4-Element Optics

1.5X Barlow Lens for Telescope Eyepiece with Image Direction Adjustment and Dust

SVBONY SV137 Barlow Lens 2X, 1.25 Inches, Telescope 2X Barlow Lens Fully Multi Coated with Metal Body, Telescope Accessories for Eyepiece and Camera, for Astronomical Observation and Photography

Astromania Bahtinov Mask Focusing Mask for Telescopes - FM180mm for a Tube Outer Diameter (OD) from 195mm-240mm - can be Mounted with The Brass Screws Inside or Outside The drawtube

Astromania Upgraded 2.5X 2 inch Barlow Lens - 4 Elements Broadband Green Film with Fully Multi Coated, Metal Telescope Accessory with Internal Brass Ring for 2 inch & 1.25 inch Telescope Eyepiece

Solomark 1.25" 2X Barlow Lens Metal with M42x0.75 Thread Camera Interface for Telescopes