SV555 Upgraded Astro-Camera Lens

Next-gen desensitized optical design for effortless focus and pin-sharp clarity. Integrated Petzval APO structure supports $44\text{mm}$ full-frame sensors and seamless EAF auto-focusing.

F4.5–F22 Variable Aperture

Fine-tune exposure and depth of field effortlessly. Graded click-stops prevent accidental changes, ensuring parameter stability during long exposure sequences.

Seamless Mount & Filter Integration

Rear M48x0.75 thread accepts standard 2" astro-filters. Dual Vixen/Arca-Swiss plate provides rock-solid mounting on both camera tripods and equatorial mounts.

Universal M48 Threading | Fast & Secure Camera Connection

Designed with an upgraded M48 threaded mount that directly replaces traditional screw-tightening setups. It seamlessly connects to DSLR and mirrorless cameras (with matching adapter) for faster assembly, precise optical alignment, and zero wobbling during exposure.

Ultra-Stable $220\text{mm}$ Mounting System

Multi-functional handle ensures easy carrying and accessory mounting. Extended $220\text{mm}$ dovetail plate allows precise balance tuning for heavy camera setups.

Versatile Day & Night Shooting

Front M72 filter thread allows easy attachment of standard camera filters. Seamlessly transition from deep-sky astrophotography to daytime telephoto shooting.

Reversible Lens Hood | Ultra-Compact Outdoor Carrying

Features an inverted lens hood design that reverses neatly over the barrel to save essential bag space. Effortlessly pack your optic into standard camera bags for outdoor astrophotography without sacrificing front-element protection.

Verified Optical Precision | Guaranteed 0.997 Strehl Ratio

We validate every unit with individual Zygo interferometry testing before it ships, giving you factory-certified proof of optical perfection. Achieving a 0.997 Strehl ratio means maximum light throughput, needle-sharp star pinpointing, and zero guesswork about the quality of your astrophotography rig.

Apochromatic Color Control | True-to-Life Stellar Color

Precision-corrected wavelength convergence eliminates distracting purple halos and color fringing around bright stars. Enjoy ultra-clean star profiles and vibrant, natural target colors right out of the camera.

Universal Dovetail Plate | Flexible Multi-Port Rig Integration

Equipped with standard 1/4"-20 and 3/8"-16 threads plus M6 mounting slots, allowing you to seamlessly attach guide scopes and accessories without extra adapters.

Engineered Precision Dimensions | Effortless Balancing & Rig Planning

Designed with exact physical proportions—including a 220mm base plate, 90mm front diameter, and M72 objective threads—giving you complete clarity when planning your rig. Knowing precise clearance and weight balance ahead of time ensures quick, hassle-free mounting onto any equatorial mount or photography tripod.

Complete Technical Specifications | Engineered for Professional Astrophotography

Featuring a Petzval 5-element design, 44mm full-frame image circle, and FMC optics, the SV555 delivers flat-field sharpness and versatile mounting options out of the box for effortless imaging.