Quick answer
The Tamron SP 90mm f/2.5 Adaptall-2 Macro 52BB is a short telephoto macro lens covering 90mm at f/2.5 for the Pentax K mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
This 90mm f/2.5 macro lens from Tamron fits Pentax K 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 52BB specifications
- Brand
- Tamron
- Mount
- Pentax K
- 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 52BB?
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. 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° |
Frequently asked questions
What mount does the Tamron SP 90mm f/2.5 Adaptall-2 Macro 52BB use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Tamron SP 90mm f/2.5 Adaptall-2 Macro 52BB?
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 52BB 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 52BB 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. These figures are calculated from the focal length and crop factor.
Which cameras does the Tamron SP 90mm f/2.5 Adaptall-2 Macro 52BB 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.
