Starizona SCT Corrector IV - 0.63X Reducer / Coma Corrector

Starizona SCT Corrector IV - 0.63X Reducer / Coma Corrector

Focal Length

The exact focal length of the reducer/telescope combo depends slightly on where in the optical path the SCT Corrector lens is placed. Nominally it will be within a few mm of the rear threads on the telescope. Changing this distance should only affect the focal length, not the optical quality. Listed below are the nominal focal lengths for the various sizes of Celestron SCT's. *

The SCT Corrector works great on standard f/10 Meade SCTs as well, we just didn't have exact data for the nominal designs of those telescopes.

* The SCT Corrector has a reduction factor of 0.63x, but the C6 and C8 are actually closer to f/11 natively, and they have a shorter backfocus compared to the larger scopes so the reduction is a bit less.  The C14 is f/11 natively.

Specifications

• 0.63x focal reduction factor
• 2.5x faster than SCT's native f/10
• 1.4x faster than original f/7.5 SCT Corrector design
• 27mm image circle
• 2" barrel diameter
• 2.5" length excluding threads
• Threaded for 48mm filters
• SCT Corrector Top Thread: M42 x 0.75mm T-thread
• Mechanical Backfocus (thread shelf to focal plane): 90.3mm (3.56”)
• Black anodized, machined aluminum housing
• Fully multi-coated optics
• 5-element optical design with extra-low dispersion (ED) glass