Petzval Refractor Astrograph Lens | SVBONY SV545

Key Features

• 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.