Vixen NA140SS vs NA140SSf

Hi, Does any body know if there is an optical performance difference between the old Vixen model NA140SS and the current model NA140SSf? The SSf model used to come with a single speed focuser and it now comes with a 2 speed focuser at higher price. I believe that the SSf is built in China, sent to Japan for "QC inspection", stamped built in Japan before it is sent out.

What I want to know if there is an optical performance difference between the SS model and the SSf model with single speed or with 2 speed focuser versions..

Same question on CN the other day.....pretty sure the best place to get that answer is Vixen themselves.....You are correct regarding where they are made. Having seen nothing from Vixen specifically stating changes were made to the optical design or components I would guess the "improvements" were mechanical such as the dual speed.

Saied Mabrouk said:

Hi, Does any body know if there is an optical performance difference between the old Vixen model NA140SS and the current model NA140SSf? The SSf model used to come with a single speed focuser and it now comes with a 2 speed focuser at higher price. I believe that the SSf is built in China, sent to Japan for "QC inspection", stamped built in Japan before it is sent out.

What I want to know if there is an optical performance difference between the SS model and the SSf model with single speed or with 2 speed focuser versions..