night sky crafts

maksutov-cassegrain & schmidt cassegrain simulation

Celestron NexStar 4 SE Telescope $499.00 TE1) CELESTRON NEXSTAR 4SE TELESCOPE…

10mm Orion Sirius Plossl Telescope Eyepiece $45.99 With a wide 50-deg apparent field, our Sirius Plossl line of eyepieces provide clear, sharp images of impressively high contrast. They’re suitable all telescope types: reflector, refractor, and catadioptric. Each 4-element Sirius Plossl is fully coated with magnesium fluoride on every air-to-glass surface. Lens edges are blackened to reduce scattering of stray light and maximize contrast. Lenses a…

Celestron 52238 C70 Mini Mak Spotting Scope $98.00 Celestron C70 Mini Mak 25-75x Zoom Angled Spotting Scope, Black w/ Table Tripod 52238…

Orion Apex 90mm Maksutov-Cassegrain Telescope $229.99 With a tube length of 11 inches, a 90mm (3.5″) precision-polished fully multi-coated meniscus front lens, and solid uncompromising construction. the Apex 90 Compact Mak is a paragon of portability, optical excellence, and durability. Better still, it’s one of the most versatile scopes we offer. The Apex 90 delivers bright, high-contrast images, and with a focal length of 1250mm (f/13.9) you also g…

Orion FlexiShield for 150mm (6) Cassegrains $19.99 Every owner of a Schmidt-Cassegrain or Maksutov telescope knows what a pain dew can be. When it forms on the front corrector plate or lens, it’s usually time to call it a night. Our FlexiShield dew cap is the answer. It reduces the formation of dew, prolonging your observing sessions. It’s made of durable, flexible ABS plastic that won’t chip or break like hard dew caps. It wraps snugly around you…

Orion FlexiShield for 235mm (9.25) Cassegrains $19.99 Every owner of a Schmidt-Cassegrain or Maksutov telescope knows what a pain dew can be. When it forms on the front corrector plate or lens, it’s usually time to call it a night. Our FlexiShield dew cap is the answer. It reduces the formation of dew, prolonging your observing sessions. It’s made of durable, flexible ABS plastic that won’t chip or break like hard dew caps. It wraps snugly around you…

Choosing and Using a New CAT: Getting the Most from Your Schmidt Cassegrain or Any Catadioptric Telescope (Patrick Moore’s Practical Astronomy Series) $19.34 Choosing and Using the New CAT will supersede the author’s successful Choosing and Using a Schmidt-Cassegrain Telescope, which has enjoyed enthusiastic support from the amateur astronomy community for the past seven years. Since the first book was published, a lot has changed in the technology of amateur astronomy. The sophistication and variety of the telescopes available to amateurs has inc…

Choosing and Using a Schmidt-Cassegrain Telescope : A Guide to Commercial SCTs and Maksutovs (Practical Astronomy.) $38.02 Amateur astronomy is becoming more and more popular, mostly because of the availability of relatively low-cost astronomical telescopes of superb quality – commercially-made Schmidt-Cassegrain and Maksutovs. Rod Mollise’s book contains everything amateur astronomers need to know about these telescopes….

Geometric Optics: Theory and Design of Astronomical Optical Systems Using Mathematica® (Modeling and Simulation in Science, Engineering and Technology) $69.95 This book—unique in the literature—provides readers with the mathematical background needed to design many of the optical combinations that are used in astronomical telescopes and cameras. The results presented in the work were obtained by using a different approach to third-order aberration theory as well as the extensive use of the software package Mathematica®. Replete with workout…

Celestron 39-100x90mm Maksutov Angled Spotting Scope w/Tripod 52268-OP $239.95 Celestron 39-100x90mm Maksutov Angled Spotting Scope w/Tripod 52268-OP…

Celestron Granite 10×42 Binoculars $0 These binoculars from Celestron feature a state-of-the-art design with multi-coated Maksutov-Cassegrain optics. A 25-75x magnification and a 75x zoom enhances the optical quality with maximum contrast and color rendition.