Quick answer
The Vivitar 100-300mm f/5.6 Auto Tele-Zoom is a short telephoto to telephoto telephoto zoom lens covering 100-300mm at f/5.6 for the Pentax K mount. Its smaller maximum aperture favours daylight shooting and keeps the lens compact.
About this lens
A 100-300mm f/5.6 telephoto zoom lens, the Vivitar 100-300mm f/5.6 Auto Tele-Zoom is designed for Pentax K mount bodies. The range suits sports, wildlife, events and portraits.
Vivitar 100-300mm f/5.6 Auto Tele-Zoom specifications
- Brand
- Vivitar
- Mount
- Pentax K
- Focal length
- 100-300mm
- Maximum aperture
- f/5.6
- Lens type
- Telephoto Zoom
What can you shoot with the Vivitar 100-300mm f/5.6 Auto Tele-Zoom?
At 100-300mm this is a short telephoto to telephoto telephoto zoom, which typically suits:
- Portraits with a flattering perspective
- Events and weddings
- Isolating subjects from the background
- Sports and action
- Wildlife and birds at moderate distance
Its smaller maximum aperture favours daylight shooting and keeps the lens compact.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor. Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Full frame | 1.0x | 100–300mm | 6.9–20.4° | 8.2–24.4° |
| APS-C | 1.5x | 150–450mm | 4.6–13.7° | 5.5–16.4° |
Frequently asked questions
What mount does the Vivitar 100-300mm f/5.6 Auto Tele-Zoom use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Vivitar 100-300mm f/5.6 Auto Tele-Zoom?
It zooms across 100-300mm with a maximum aperture of f/5.6. That makes it a short telephoto to telephoto lens.
Is the Vivitar 100-300mm f/5.6 Auto Tele-Zoom a prime or a zoom lens?
It is a zoom lens covering 100-300mm, so you can reframe without moving. Its maximum aperture is f/5.6.
What is the Vivitar 100-300mm f/5.6 Auto Tele-Zoom equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 150–450mm on full frame, with a 4.6–13.7° horizontal and 5.5–16.4° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Vivitar 100-300mm f/5.6 Auto Tele-Zoom fit?
Any Pentax K-mount camera, including Pentax K-1, Pentax K-3, Pentax K-3 II, Pentax K-3 Mark III, and Pentax K-30 and 15 more.
Alternatives for Pentax K from other brands
All Pentax K lensesSame mount, overlapping focal range, closest maximum aperture first.
More Vivitar lenses for Pentax K
All Vivitar lensesOther 100-300mm lenses
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