ZWO ASI 120MM Mini Collimator This 20mm extension tube is

This 20mm extension tube is simply screwed into the M48 thread of either a 2" eyepiece or 2" adapter and it provides an additional 20mm optical length to your image train

Please make sure that the distance from the prism to the main camera and the tracking camera is the same

This guarantees you visibly sharp stars across some of the largest CCD chips available today

you can reduce the exposure times to less than 30 seconds - This helps to reduce the problems associated with seeing conditions and tracking errors

you can keep the sensor well cooled even at high outside temperatures

ZWO ASI 120MM Mini Collimator This 20mm extension tube isZWO ASI120 mini the compact and powerful SW astro camera and autoguiding camera. This small new planetary camera and guiding camera has improved electronics and the sophisticated software to produce the highest sharpness on the moon and planets. You can also look forward to point shaped stars during guiding, because the ASI120MM mini is a very capable and fast autoguider. The ASI120MM mini as a camera for the moon and planets: The high resolution of