TESTAR 30mm f/4 MINI GUIDE SCOPE tripod extension The QHY 268C has zero

The QHY 268C has zero amplifier glow no matter how long the exposure is

5 e (@ 30 dB)

Hole diameter: 40 mm

Right: OAG PRO with IMX174 sensor showing much less vignetting

The secondary mirror is oversized in order to have a fully illuminated field and to avoid any vignetting

TESTAR 30mm f/4 MINI GUIDE SCOPE tripod extension The QHY 268C has zeroThe Testar 30mm Mini Guide Scope has a focal length of 120mm and a focal ratio of f 4. The objective is a fully multi coated achromatic doublet for a greater optical precision. The mini dovetail bar can be firmly mounted on any standard finder scope bracket so you do not require any extra piggy back dovetail bar on your telescope. The base of the finder scope includes a 1 4" female thread for a wider compatibility among telescopes. The focus is