ZWO ASI220 mini autoguider

ASI220MM Mini camera integrates an SC2210 1/3″ sensor (7.68 mm x 4.32 mm). This camera has 1936 x 1096 pixels. The pixel size is 4 μm x 4 μm.  This camera provides 12bit ADC and its QE peak is over 92%.

ASI290 mini is designed for precise guiding. 4 um pixel size can give you high resolution. Better sensor technology and larger pixels means it has more sensitivity and less noise, resulting more sensitive camera. It means you can guide on much fainter stars (larger number of stars) then with previous models.

Mini camera is very suitable for OAG, it can have much bigger focus range than normal ASI cameras. Never to worry about that guide camera can not focus with main camera at same time.

USB 2.0 Port: Mini camera has one USB2.0 type C port. Type C port is very popular in mobile phones, it will not care about positive side and negetive side of the adapter.
ST4 Port: Can connect mini camera direct connect to auto guide port of mount.