The telescope manufacturer William Optics offers very high-quality apochromatic and achromatic refractors which are very well suited to visual observation, and especially to astrophotography.
William Optics
Flat GT
$ 381.00
ready for shipping in 3-5
weeks
William Optics
Flattner Flat61A for Z61
$ 335.00
ready for shipping in 24
h
William Optics
Adjustable Flattener Reducer Flat6AIII
$ 335.00
ready for shipping in 3-5
weeks
William Optics
Flattener Flat68III
$ 1,010.00
ready for shipping in 3-7
days
William Optics
Adjustable Flattener Reducer Flat7A
$ 990.00
ready for shipping in 3-7
days
William Optics
Flattener Flat73A for ZenithStar 73
$ 335.00
ready for shipping in 24
h
William Optics
Flat6A III Special Edition FLT91
$ 497.00
ready for shipping in 3-5
weeks