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If you are searching for the most precise motorized focuser for Borg 90FL and 107FL f3.9, this adapter allows you to connect ESATTO 3" to these telescopes. Remove the original focuser of the Borg 90FL and 107FL f3.9 and install ESATTO 3". In order to reach the focus you can use the same photo adapters that you use with the standard focuser.

Adapter ESATTO 3" for Borg 90FL and 107FL f3.9 is composed by 2 rings, one to connect the microfocuser to the carbon fiber optical tube and another one to insert the Borg reducer/flattener in the focuser.

Adapter ESATTO 3 for Borg 90FL and 107FL f3.9