Open Box ES Field Flattener For f/5 to f/7 Refractors Color Camera One ED (extra-low dispersion) glass

One ED (extra-low dispersion) glass element is incorporated to effectively reduce chromatic aberration

and the bodies of the eyepieces/filters are unmarked

allowing it to achieve 13 stops of dynamic range

or scratches

It is the color version of the ASI2600MM Pro

Open Box ES Field Flattener For f/5 to f/7 Refractors Color Camera One ED (extra-low dispersion) glassCondition: This is an open box return in excellent condition. The outer body is unmarked and the optics are clean. Though, this is missing and does not include the M48 adapter. Otherwise it is practically new and includes the original box. Description: This is a field flattener for refractor type telescopes with a focal ratio of f 5 to f 7 Causes no change to the telescope focal length 2 inch barrel to easily attach to a two inch focuser Fully multi