Quick answer
The Tamron 300mm f/5.6 Adaptall-2 is a telephoto telephoto lens covering 300mm at f/5.6 for the M42 mount. Its smaller maximum aperture favours daylight shooting and keeps the lens compact.
About this lens
This 300mm f/5.6 manual-focus telephoto prime lens from Tamron fits M42 mount cameras. It brings distant subjects closer for sports, wildlife and events.
Tamron 300mm f/5.6 Adaptall-2 specifications
What can you shoot with the Tamron 300mm f/5.6 Adaptall-2?
At 300mm this is a telephoto telephoto, which typically suits:
- Sports and action
- Wildlife and birds at moderate distance
- Compressing distant landscapes
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 (adapted mount, so sensor size depends on your camera). Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Full frame | 1.0x | 300mm | 6.9° | 8.2° |
| APS-C | 1.5x | 450mm | 4.6° | 5.5° |
| Micro Four Thirds | 2.0x | 600mm | 3.4° | 4.1° |
Frequently asked questions
What mount does the Tamron 300mm f/5.6 Adaptall-2 use?
It uses the M42 mount, so it fits M42 cameras directly and can be used on other systems through a mount adapter.
What is the focal length of the Tamron 300mm f/5.6 Adaptall-2?
It is a fixed 300mm lens with a maximum aperture of f/5.6. That makes it a telephoto lens.
Is the Tamron 300mm f/5.6 Adaptall-2 a prime or a zoom lens?
It is a prime lens with a fixed 300mm focal length. Primes usually open wider than zooms; this one opens to f/5.6.
What is the Tamron 300mm f/5.6 Adaptall-2 equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 450mm on full frame, with a 4.6° horizontal and 5.5° diagonal field of view. On Micro Four Thirds (2x crop) it frames like 600mm on full frame, with a 3.4° horizontal and 4.1° diagonal field of view. These figures are calculated from the focal length and crop factor.
Alternatives for M42 from other brands
All M42 lensesSame mount, overlapping focal range, closest maximum aperture first.
