From the Sigma XQ lenses booklet:
The Sigma 500mm F8 has been designed to satisfy the requirements of telephotography enthusiasts and is an excellent example of what Sigma
represents. Our name "SIGMA", comes from Greek and is used in mathematics to indicate the "sum" or culmination; Sigma Lenses are the
culmination of our experience, research and development, and quality control. These qualities are reflected in the 500mm mirror lens'
capability of living up to professional standards of sharpness, contrast, and color balance. Not only is the Sigma 500mm F8 optically excellent,
but is a trim 1,100 grams, making it handholdable as well as portable. It has a large, smoothly moving focusing ring, built on lens hood, and a
high quality finish.
| Production information: | |
Announced: | 1967 |
Production status: | ● Discontinued |
Country of design: | Japan |
Original name: | SIGMA MIRROR ULTRATELEPHOTO 1:8 f=500mm |
| SIGMA-XQ MIRROR ULTRA-TELEPHOTO MULTI-COATED 1:8 f=500mm | |
Class: | Slow full-frame super telephoto prime lens |
| Mirror/Reflex lens | |
| Optical design: | |
| 35mm full frame | |
| 500mm | |
| F/8 | |
| 5 elements in 5 groups | |
| Interchangeable (T) | |
| 5° (35mm full frame) | |
| Diaphragm mechanism: | |
Diaphragm type: | Fixed |
Aperture control: | None |
| Focusing: | |
| 4m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| 1100g | |
| ⌀77×220mm | |
| Accessories: | |
| Screw-type 77mm | |
| Rear screw-type 33.5mm | |
| Built-in telescopic round |
