Quick answer
The Tamron SP 28mm f/2.5 Adaptall-2 is a wide-angle prime lens covering 28mm at f/2.5 for the Canon FD mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
A 28mm f/2.5 manual-focus wide-angle prime lens, the Tamron SP 28mm f/2.5 Adaptall-2 is designed for Canon FD mount bodies, from the Tamron SP series. The wide view suits landscapes, architecture and environmental shots.
Tamron SP 28mm f/2.5 Adaptall-2 specifications
- Brand
- Tamron
- Mount
- Canon FD
- Focal length
- 28mm
- Maximum aperture
- f/2.5
- Lens type
- Prime
- Format coverage
- full-frame
- Released
- 1979
- Optical construction
- 7 elements in 7 groups
- Autofocus motor
- none
- Minimum focus distance
- 0.25 m
- Filter thread
- 49 mm
- Weight
- 180 g
- Length
- 37.5 mm
- Diameter
- 64.5 mm
Specification source: en.wikipedia.org
What can you shoot with the Tamron SP 28mm f/2.5 Adaptall-2?
At 28mm 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 | 28mm | 65.5° | 75.4° |
| APS-C | 1.6x | 45mm | 43.8° | 51.6° |
| Micro Four Thirds | 2.0x | 56mm | 35.6° | 42.2° |
Frequently asked questions
What mount does the Tamron SP 28mm f/2.5 Adaptall-2 use?
It uses the Canon FD mount, so it fits Canon FD cameras directly and can be used on other systems through a mount adapter.
What is the focal length of the Tamron SP 28mm f/2.5 Adaptall-2?
It is a fixed 28mm lens with a maximum aperture of f/2.5. That makes it a wide-angle lens.
Is the Tamron SP 28mm f/2.5 Adaptall-2 a prime or a zoom lens?
It is a prime lens with a fixed 28mm focal length. Primes usually open wider than zooms; this one opens to f/2.5.
What is the Tamron SP 28mm f/2.5 Adaptall-2 equivalent on a crop sensor?
On APS-C (1.6x crop) it frames like 45mm on full frame, with a 43.8° horizontal and 51.6° diagonal field of view. On Micro Four Thirds (2x crop) it frames like 56mm on full frame, with a 35.6° horizontal and 42.2° diagonal field of view. These figures are calculated from the focal length and crop factor.
Alternatives for Canon FD from other brands
All Canon FD lensesSame mount, overlapping focal range, closest maximum aperture first.
