Diagonal Prism Optical Prism inside rather than a mirror which makes your image clear and sharp
1.25 inch 45 degree mirror star diagonal for any telescope with 1.25 inch connector ;not suitable for Newtonians
More comfortable viewing orientation as you observe from above; filter thread for any 1.25 inch filter;. Accepts standard 1.25 inch eyepieces
As many celestial objects; such as nebulae; radiate at other wavelengths; a considerable increase in contrast can be achieved by this; The background sky appears darker and all at once; faint details become visible
1.25 inch filter thread; each Alstar Ultra High Contrast Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the O III and H beta emission lines
Alstar Barlow Lens, 5X Short Barlow Lens 1.25 Inch 4-Element Multi-Coated | For 1.25" Telescope Eyepiece, Apochromatic Correction, Clear and Sharp Images, Compression Ring, Ultra-Short Length Accessory
SAR 647
Alstar 1.25 inch 2X Barlow Lens with M42 Thread Telescope Accessories | MultiCoated Lens, Robust Metal Housing, Camera Connect Interface, Two Fixing Thumbscrews, Extra Focuser Back Travel
SAR 89
Alstar Telescope Diagonal, 45 Degree 1.25 Inch Correct Image Diagonal Prism | Upright and Non-Reversed Image, Metal Connectors, Filter Thread, Coated for High Contrast, Telescope Accessory for Refractor
SAR 126
Alstar M48X0.75 Female to M42X0.75 T / T2 Male Thread Telescope Adapter | M48 Inner Thread to T2 Outer Thread, Connection to Eyepieces, Cameras, Telescopes, No Focusing Problems, Anodizing Aluminium
SAR 68
