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FSQ

From SharedSkies

The FSQ optical assembly is the wide field telescope tandem with the RC24, and the focusing optics of the small Littrow echelle used for stellar spectroscopy.


The FSQ-106ED uses two ED (extra-low dispersion) glass elements based on the classic two-doublet Petzval design. It provides very low levels of aberration and image sizes less than a single pixel of the CCD camera which is used with it:

Aperture: 4.2" or 106 mm

Focal ratio: f/5

Focal length: 530 mm

Focal plane scale: 0.108 degrees/mm or 389 "/mm


FSQ 106 Light Path