SVBONY SV545 45mm f/4.5 Petzval APO Astrograph Lens
SVBONY SV545 45mm f/4.5 Petzval APO Astrograph Lens
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SVBONY SV545 45mm f/4.5 Petzval APO Astrograph Lens
The SVBONY SV545 is a premium 45mm f/4.5 Petzval APO astrograph lens engineered for wide-field deep-sky imaging. With a precision 3-group 5-element Petzval optical design, it delivers a naturally flat field with excellent correction and edge-to-edge pinpoint stars, eliminating the need for an external field flattener.
Its 44mm full-frame image circle makes it ideal for modern astronomy cameras, mirrorless systems and DSLR astrophotography, while the ultra-lightweight 980g OTA design makes it perfect for portable star trackers and travel imaging setups.
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✔ 980g travel-ready astrograph
Key Features
- 45mm f/4.5 Fast Optics: Excellent for wide-field nebulae, star fields and Milky Way mosaics.
- Petzval APO Design: 3-group 5-element layout with built-in field flattening.
- 44mm Full-Frame Coverage: Fully compatible with full-frame and APS-C cameras.
- 980g Lightweight OTA: Ideal for travel astrophotography and tracker mounts.
- Integrated Helical Focuser: Smooth manual focusing for precision control.
- CAA Rotator: Lockable 360° framing adjustment for perfect composition.
- M48 Rear Interface: Supports 2" filters and common astronomy camera accessories.
- FMC Coatings: High transmission with reduced reflections and better contrast.
Built for Portable Wide-Field Imaging
At only 980g OTA weight, the SV545 is one of the best choices for portable astrophotography rigs. It pairs beautifully with harmonic mounts, lightweight equatorial systems and star trackers, making it ideal for travelling to dark sky sites or building an airline-friendly imaging setup.
The fast 202.5mm focal length makes it perfect for large targets such as the North America Nebula, Heart and Soul, Rosette, Andromeda and Milky Way panorama mosaics.
Technical Specifications
| Optical Design | 3-group 5-element Petzval APO |
|---|---|
| Aperture | 45mm |
| Focal Length | 202.5mm |
| Focal Ratio | f/4.5 |
| Image Circle | 44mm Full Frame |
| Coatings | Fully Multi-Coated (FMC) |
| Focuser | Integrated helical |
| Rotator | Lockable 360° CAA |
| Rear Thread | M48 x 0.75 |
| Filter Support | 2" filters |
| Weight | 980g OTA only |
What’s Included
The SV545 includes the optical tube, mounting hardware, carry bag, dovetail support components and accessories supplied by SVBONY for immediate setup and imaging.
Why Choose the SV545?
The SV545 is designed for astrophotographers who want premium full-frame optical performance in an ultra-light portable format. Its Petzval design keeps the imaging train simple, the 44mm image circle supports large sensors, and the low weight makes it one of the best travel astrographs in its class.
For users building compact rigs around portable trackers, mirrorless cameras, cooled CMOS cameras and remote dark-sky travel systems, the SV545 is an outstanding choice.
