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Greg,
Did you ever try the FSQ visually ?
I used a 106N many times, it was absolutely superb on all objects and exhibited excellent contrast that Taks top end refractors are renowned for.
The moon was excellent and as you would expect from such a well corrected device there was no CA to be observed.
I have never understood why anyone would say because its a flattened field device that it isnt good visually.
Clearly they never actually tried one !
I doubt you would find a better OTA for visual use in its size - equal maybe but I doubt better.
The only trick to the early FSQ106's was focus for visual, they had very short back focus (a well known issue for AP when trying to add in MOAGs, electronic focussers etc) so you needed to use the dedicated Tak FSQ diagonal and appropriate adapters in order to use it visually.
This diagonal was extremely short profile and used a negative length adapter, the diagonal optics actually protruded back into the FSQ to within a bees whisker of the 4th Petzval element.
Any standard diagonal would put the EP beyond the focal point and hence it wasn't useable.
So although the OPs post was for AP, he could certainly use it for visual and not have any regrets or downside - just make sure you have the right diagonal and the adapter that is needed to go with it as well as the low profile 1.25" compression adapter.
Rally
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