Quick answer
The Tamron SP 90mm f/2.5 Adaptall-2 Macro 52B is a short telephoto macro lens covering 90mm at f/2.5 for the Olympus OM mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
The Tamron SP 90mm f/2.5 Adaptall-2 Macro 52B is a manual-focus macro lens covering 90mm at f/2.5 for Olympus OM mount cameras, from the Tamron SP series. It is intended for close-up work with small subjects such as flowers and insects.
Tamron SP 90mm f/2.5 Adaptall-2 Macro 52B specifications
- Brand
- Tamron
- Mount
- Olympus OM
- Focal length
- 90mm
- Maximum aperture
- f/2.5
- Lens type
- Macro
- Format coverage
- full-frame
- Optical construction
- 8 elements in 6 groups
- Autofocus motor
- none
- Minimum focus distance
- 0.39 m
Specification source: en.wikipedia.org
What can you shoot with the Tamron SP 90mm f/2.5 Adaptall-2 Macro 52B?
At 90mm this is a short telephoto macro, which typically suits:
- Portraits with a flattering perspective
- Events and weddings
- Isolating subjects from the background
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 | 90mm | 22.6° | 27° |
| APS-C | 1.5x | 135mm | 15.2° | 18.2° |
| Micro Four Thirds | 2.0x | 180mm | 11.4° | 13.7° |
Frequently asked questions
What mount does the Tamron SP 90mm f/2.5 Adaptall-2 Macro 52B use?
It uses the Olympus OM mount, so it fits Olympus OM cameras directly and can be used on other systems through a mount adapter.
What is the focal length of the Tamron SP 90mm f/2.5 Adaptall-2 Macro 52B?
It is a fixed 90mm lens with a maximum aperture of f/2.5. That makes it a short telephoto lens.
Is the Tamron SP 90mm f/2.5 Adaptall-2 Macro 52B a prime or a zoom lens?
It is a prime lens with a fixed 90mm focal length. Primes usually open wider than zooms; this one opens to f/2.5.
What is the Tamron SP 90mm f/2.5 Adaptall-2 Macro 52B equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 135mm on full frame, with a 15.2° horizontal and 18.2° diagonal field of view. On Micro Four Thirds (2x crop) it frames like 180mm on full frame, with a 11.4° horizontal and 13.7° diagonal field of view. These figures are calculated from the focal length and crop factor.
Alternatives for Olympus OM from other brands
All Olympus OM lensesSame mount, overlapping focal range, closest maximum aperture first.
