Photo: Javier Perez Montes (CC BY-SA 4.0)
Quick answer
The Tamron SP 24mm f/2.5 Adaptall-2 is a wide-angle prime lens covering 24mm at f/2.5 for the M42 mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
This 24mm f/2.5 manual-focus wide-angle prime lens from Tamron fits M42 mount cameras, from the Tamron SP series. The wide view suits landscapes, architecture and environmental shots.
Tamron SP 24mm f/2.5 Adaptall-2 specifications
- Brand
- Tamron
- Mount
- M42
- Focal length
- 24mm
- Maximum aperture
- f/2.5
- Lens type
- Prime
- Format coverage
- full-frame
- Optical construction
- 10 elements in 9 groups
- Autofocus motor
- none
- Minimum focus distance
- 0.25 m
- Filter thread
- 55 mm
Specification source: en.wikipedia.org
What can you shoot with the Tamron SP 24mm f/2.5 Adaptall-2?
At 24mm this is a wide-angle prime, which typically suits:
- Landscapes and cityscapes
- Street and travel photography
- Environmental portraits and interiors
Its bright maximum aperture handles indoor and evening light reasonably well.
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 | 24mm | 73.7° | 84.1° |
| APS-C | 1.5x | 36mm | 53.1° | 62° |
| Micro Four Thirds | 2.0x | 48mm | 41.1° | 48.5° |
Frequently asked questions
What mount does the Tamron SP 24mm f/2.5 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 SP 24mm f/2.5 Adaptall-2?
It is a fixed 24mm lens with a maximum aperture of f/2.5. That makes it a wide-angle lens.
Is the Tamron SP 24mm f/2.5 Adaptall-2 a prime or a zoom lens?
It is a prime lens with a fixed 24mm focal length. Primes usually open wider than zooms; this one opens to f/2.5.
What is the Tamron SP 24mm f/2.5 Adaptall-2 equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 36mm on full frame, with a 53.1° horizontal and 62° diagonal field of view. On Micro Four Thirds (2x crop) it frames like 48mm on full frame, with a 41.1° horizontal and 48.5° 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.
