How to reach the 55mm back focus with ASI cameras?
The back focus is advised by the telescope manufacturers.
Since most telescopes have 55mm back focus, we are providing the detailed guidelines for all our cooled cameras.
Please be noted that these are just examples for 55mm back focus, you need to know the back focus of your reducer and flattener first and then arrange the adapters.
Notice: About small format, 174, 178, 385, 290, 224, 185, etc. The pacakge does not include some adapters, please take a look at the diagram of package list in product description.