Opteka 500mm f/6.3 Reflex Telephoto Mirror Lens
The Opteka 500mm f/6.3 is a 500mm f/6.3 lens designed for T-Mount mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Opteka 500mm f/6.3 Reflex Telephoto Mirror Lens
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Lens Overview — Opteka 500mm f/6.3
Key Features — Opteka 500mm f/6.3
500mm Fixed Focal Length: Provides substantial reach for distant subjects like wildlife, sports, and celestial objects from a fixed position.
Reflex Mirror Design: Catadioptric (mirror) optical construction keeps the physical length of the lens compact relative to its 500mm focal length.
f/6.3 Fixed Aperture: A fixed aperture throughout, which is typical of mirror lens designs and should be factored into exposure planning.
T-Mount Interface: Universal T-Mount base makes the lens adaptable to Canon EF, Nikon F, Sony E, Micro Four Thirds, and many other camera systems using inexpensive adapters.
Full-Frame Coverage: Image circle covers full-frame sensors, so the lens can be used on both full-frame and crop-sensor bodies without vignetting.
Manual Focus Only: Fully manual focus operation suits deliberate shooting styles common in wildlife, astronomy, and landscape photography from a tripod.
Lens Specifications — Opteka 500mm f/6.3
| Spec | Detail |
|---|---|
| Use Cases | Wildlife, Birding, Astrophotography, Sports, Travel |
| Lens Type | Telephoto |
| Format | Full Frame |
| Zoom/Prime | Prime |
| Focal Length | 500mm |
| Maximum Aperture | f/6.3 |
| Camera System | DSLR |
| Lens Mount | T-Mount |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 95mm |
Description — Opteka 500mm f/6.3
The Opteka 500mm f/6.3 Reflex Telephoto Mirror Lens is a 500mm fixed focal length super telephoto prime built around a T-Mount interface for broad camera system compatibility. With a maximum aperture of f/6.3 and a full-frame image circle, it delivers substantial reach across both full-frame and crop-sensor bodies. Weighing just 705g, it is a manageable option for a lens in the super telephoto category.
Focus is fully manual — there is no autofocus system — making it best suited to stationary or slow-moving subjects where the photographer has time to dial in focus precisely. Image stabilization is not present, so using a tripod or monopod is highly recommended to keep images sharp at this focal length. The lens accepts 95mm front filters, giving photographers control over exposure and light management. The T-Mount design means a separate adapter is needed for your specific camera body, but this also makes the lens adaptable to many different systems.
Pros — Opteka 500mm f/6.3
- ✓500mm super telephoto focal length provides substantial reach for distant subjects
- ✓Full-frame coverage (lensFormat: Full Frame) means no crop-related vignetting on any sensor size
- ✓Relatively lightweight at 705g for a 500mm prime lens
Cons — Opteka 500mm f/6.3
- ✗Manual focus only — no autofocus support, which can make tracking moving subjects difficult
- ✗Maximum aperture of f/6.3 is relatively modest, limiting performance in lower light conditions
- ✗No image stabilization, increasing the need for solid camera support at 500mm
Videos — Opteka 500mm f/6.3
a6500 with 500mm Mirror Lens? Stabilized beast or junk? — Pulse of Polaris