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[Why am I selling this great telescope? Because when the FS-128 was designed in the 1990s, Takahashi considered it unnecessary to provide a flattener for the film and smallish CCDs then in use. I am now using an STL 11k CCD camera with a 36 x 24mm chip and a flattener is needed to achieve round stars at the edges of the large field.
If you get the 4 inch focuser (from Texas Nautical) (US$895) you can use the FS152 flattener which comes up on Astromart every now and then (US$695) and you should get round stars to the corner with an FS128. I had an FS152 and did that and it had round stars to the corner with an STL11.
Greg.
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