Cumberland Optical, the fabricators of the finest optics in the world will now produce the same high quality optics for the individual who wants to create a personal, customized optical system.  Three sets of components are offered to accommodate your preferences and assembly capability. 

4" f/15 MAKSUTOV System

features:

BK7 precision annealed Corrector Lens

Magnesium Fluoride coatings on both sides

Protected Aluminium  Secondary spot on R2 (cx) surface

Pyrex fine annealed Primary Mirror, 4.4" diameter

Protected Aluminum coatings on front surface

Wavefront correction: 1/6 wave or better

No spherical aberration

Center hole for mounting

4" diameter clear aperture

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6" f/15 MAKSUTOV System

features:

BK7 precision annealed Corrector Lens

Magnesium Fluoride coatings on both sides

Protected Aluminium  Secondary spot on R2 (cx) surface

Pyrex fine annealed Primary Mirror, 6.6" diameter

Protected Aluminum coatings on front surface

Wavefront correction: 1/6 wave or better

No spherical aberration

Center hole for mounting

6" diameter clear aperture