Choose this product ONLY if you are also ordering a new Binotron 27. If only ordering an OCS A45, use that product page with a price of $249.00
 
The OCS A45 was designed due to demand! FAST DOBS  have very steeply converging light cones coming off the secondary mirror. Since the OCS Optic must go deeply into the converging cone to allow the Binotron 27 to reach focus, we made an optic that simply cannot be any larger in clear aperture and still be held securly in an anodized aluminum cell. The picture speaks for itself. Used with the Binotron-27 Super System, this optic grabs those outer peripheral rays missed by the OCS A37 and produces a brighter image. Alone this optic costs $249.00. Add it to a new Binotron 27 order and recieve a $100.00 discount! Please see "OCS A45 For New Binotron" under "products" (this product listing) and order it there IF you are also ordering any Binotron 27 Super System. A new Binotron 27 order must be placed to recieve this $149.00 option price.