ZWO ASI174Mini USB2.0 Mono Guide Camera - ASI174MINI Equalizer 25" Dielectric Diagonal has an

25" Dielectric Diagonal has an amazing 1/10 Wave flatness dielectric coated mirror

All optical surfaces of the Maxbright® II feature a 7-layer multi-coating

Secondary Mirror Obstruction by Diameter: 28 %

There is also a high-precision scale and 10cm focusing travel

ZWO ASI174Mini USB2.0 Mono Guide Camera - ASI174MINI Equalizer 25" Dielectric Diagonal has anZWO ASI174MM Mini Monochrome Imaging Camera The mini version of the ASI174MM has a 1. 25" barrel size, making it really easy to connect to your telescope and focus, since the 174mini comes to focus at the same position as an eyepiece! With it's high dynamic range and low read noise, the ASI174MM Mini will make a good planetary imager as well as a guider. The Sony IMX174 monochrome sensor has a 1936 x 1216 pixel array in a 11. 3 mm x 7. 1 mm (1 1. 2")