[APML] Compare Tak 106 FSQ with Borg 100ED

[glenn shaw <glennshaw@alaska.net>]

Hello:

Does anybody have comparison information for mediumformat astrocameras 
using A.  the Borg 100ED system with dual focal length (f4 and f6.4), 
versus B. the Takahashi FSQ 106 f5 refractor?

I have seen gorgeous photographs using the Borg system by Jon Kolb. Are 
there any astrophotos out there taken in medium format through the Tak 
FSQ 106? One spy indicated that the FSQ might have a "hot 
spot"......does anybody know how serious this is for astrophotography?

I recognize that the helical focusing system of the Borg along with 
knife edge focuser represents a beautiful, almost foolproof system. 
Evidently, one would have a rougher time reaching satisfactory focus 
with the FSQ 106, or so I surmise?

Any information will be greatly appreciated.    Glenn Shaw

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