SVBONY SV545 Petzval Refractor Astrograph Lens - W9317B

Advanced 3G5E Petzval APO Design Our 3-group, 5-element triplet Petzval APO structure ensures superior optical consistency and portability compared to complex 6-group all-separated designs—delivering exceptional sharpness with a simpler, more reliable form. Built-in Flat Field for Perfect Frame Featuring a native flat-field design, it eliminates the need for external correctors—saving cost and setup time while providing edge-to-edge star clarity right out of the box. Integrated Focus with EAF Readiness The one-piece helical focuser comes pre-equipped for Electronic Auto Focuser (EAF) mounting—enabling smooth, automated fine-tuning during imaging, unlike separate manual focus systems. Universal Compatibility & Easy Integration Designed with standard threaded interfaces and ample back focus, it seamlessly connects to DSLRs, astronomy cameras, and filter wheels—streamlining your imaging train without adapters. Robust Build for Demanding Conditions With an all-metal body, protective lens coatings, and sealed construction, it performs reliably in humid or dusty environments—made for lasting performance under the stars. Package Includes: Astro APO Camera Lens EAF Mount Kit Handle with integrated Vixen Finder saddle Dovetail plate Camera Angle Adjuster 2" Filter Holder (assembled with the Lens) Plastic Lens Cover M48 Metal Lens Cover Soft Padded Case Wrench& Screw Instruction Manual Model SV545 Objective Type Petzval Design（5 Elements in 3 Groups) Aperture 45mm Optic Coated FMC Focal Length 203mm Focal Ratio f/4.5 Focuser Helical Lockable 360º rotator Yes Mount Type Dovetail Plate Back-end connection M48x0.75 male thread Estimated weight 2750g