StarField Bahtinov Mask - 140 mm - FM-140 61 mm Refractors William Optics Product Number: D-DIG2D-C-DB

William Optics Product Number: D-DIG2D-C-DB

The mount can attach to a tripod using a 3/8”-16 thread and includes an adapter for ¼”-20 thread sizes

8 oz (590 g) Environmental Protection: Waterproof Nitrogen Filled: Yes Tripod Adaptable: Yes Carrying Case: Padded woven nylon Camera Adaptable: Yes Dimensions: 208 mm x 127 mm x 68 mm (8

Explore Scientific Nebula Filter CLS 2"

Taper brass altitude washer X1

StarField Bahtinov Mask - 140 mm - FM-140 61 mm Refractors William Optics Product Number: D-DIG2D-C-DBThis StarField Bahtinov Mask is sized for 125 mm 130 mm telescopes and fits dew shields with an outside diameter of 153 mm to 192 mm. While basic, often home made focus masks have been used for quite some time, the Bahtinov mask, with it's distinctive pattern, is unique. Invented by Russian amateur astronomer Pavel Bahtinov, this mask has quickly become the astro imager's choice for fine focusing a telescope. To use, place the Bahtinov mask in front