This adapter can be used on all uncooled ASI cameras to reduce the back focus distance to about 5mm.
This allows to reach the focus on telescopes that have an extra short back focus such as the Coronado PST. Just unscrew the original cover and screw on the low profile nose.
Please note: when you open the camera to install this adapter, make sure that the camera is on a flat surface with the lens/protecting window pointed upwards. This will reduce the chance for dust to drop above the sensor.
PS: this cover can not hold the protecting window of ASI174MM/MC. It is suggested to install an external 1.25" filter to protect the sensor from dust.