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Elliptical secondary flat for Newtonian telescopes with 35 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 44 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 50 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 63 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 75 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 82 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 90 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 100 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 110 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 120 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 130 mm diameter minor axis and 97 % coating.
Elliptical secondary flat for Newtonian telescopes with 140 mm diameter minor axis and 97 % coating.