Quick answer
The Tamron SP 135mm f/2.5 CF Adaptall-2 is a short telephoto telephoto lens covering 135mm at f/2.5 for the M42 mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
This 135mm f/2.5 manual-focus short-telephoto prime lens from Tamron fits M42 mount cameras, from the Tamron SP series. The focal length is a classic choice for portraits and details.
Tamron SP 135mm f/2.5 CF Adaptall-2 specifications
- Brand
- Tamron
- Mount
- M42
- Focal length
- 135mm
- Maximum aperture
- f/2.5
- Lens type
- Telephoto
- Format coverage
- full-frame
- Released
- 1979
- Optical construction
- 4 elements in 4 groups
- Autofocus motor
- none
- Minimum focus distance
- 1.2 m
- Filter thread
- 58 mm
- Weight
- 410 g
- Length
- 84 mm
- Diameter
- 68 mm
Specification source: en.wikipedia.org
What can you shoot with the Tamron SP 135mm f/2.5 CF Adaptall-2?
At 135mm this is a short telephoto telephoto, 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 | 135mm | 15.2° | 18.2° |
| APS-C | 1.5x | 203mm | 10.2° | 12.2° |
| Micro Four Thirds | 2.0x | 270mm | 7.6° | 9.2° |
Frequently asked questions
What mount does the Tamron SP 135mm f/2.5 CF 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 135mm f/2.5 CF Adaptall-2?
It is a fixed 135mm lens with a maximum aperture of f/2.5. That makes it a short telephoto lens.
Is the Tamron SP 135mm f/2.5 CF Adaptall-2 a prime or a zoom lens?
It is a prime lens with a fixed 135mm focal length. Primes usually open wider than zooms; this one opens to f/2.5.
What is the Tamron SP 135mm f/2.5 CF Adaptall-2 equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 203mm on full frame, with a 10.2° horizontal and 12.2° diagonal field of view. On Micro Four Thirds (2x crop) it frames like 270mm on full frame, with a 7.6° horizontal and 9.2° 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.
