TS OPTICS 2X ED BARLOW 2" Optical accessory The bar is 60mm long

The bar is 60mm long

Dust on the sensor window (seen as 'donut' shaped spots on the image)

ASI2400 Optical thickness 5mm Internal thread M54 x 0

the aluminium is sandblasted to achieve a very smooth surface finish and is anodized (hard anodizing) to increase the hardness of the material and to protect it from oxidation

TS OPTICS 2X ED BARLOW 2" Optical accessory The bar is 60mm longThe TS Optics 2x ED 2" Deluxe Barlow lens is high quality yet affordable and features an ED (extra low dispersion) element for better colour correction and contrast. The brass compression ring precisely locks your eyepiece or accessory. Its large aperture of 37mm gives a fully illuminated field without vignetting with any 2" eyepiece. The Barlow lens element can be removed and screwed directly into the 2" filter thread of any eyepiece or adapter,