Specifications#
- Brand
- Sony
- Model
- DT 50mm f/1.8 SAM
- Lens type
- Portrait / short tele prime
- Focal length
- 50 mm
- Maximum aperture
- f/1.8
- Image circle
- APS-C (23.5×15.6 mm)
- Mount(s)
- Sony / Minolta A-mount
- Projection
- Rectilinear
- Autofocus motor
- smooth (SAM)
- Lensfun correction profile
- Yes — distortion/vignetting/TCA
Equivalent focal length on different cameras#
Field of view and depth-of-field equivalence when this lens is used on bodies with different sensor sizes (natively or via an adapter).
| Camera format | At 50 mm | Equiv. aperture (DoF) |
|---|---|---|
| APS-C | 75 mm · 32° | f/2.7 |
| APS-C (Canon) | 80 mm · 30° | f/2.9 |
| Micro Four Thirds | 100 mm · 24° | f/3.6 |
Depth of field & background blur#
Computed on its native APS-C format (CoC 20 µm). “Blur @2 m” is the size of an out-of-focus point at infinity, as a percentage of frame width, with the subject at 2 m — a simple bokeh index. Full table: 50 mm f/1.8 on aps-c.
| Focal | Aperture | at 1 m | at 2 m | at 5 m | at 10 m | Hyperfocal | Blur @2 m |
|---|---|---|---|---|---|---|---|
| 50 mm | f/1.8 | 2.7 cm | 11.0 cm | 70.0 cm | 2.86 m | 71.1 m | 3.0% |
| 50 mm | f/4 | 6.0 cm | 24.5 cm | 1.59 m | 6.90 m | 32.0 m | 1.4% |
| 50 mm | f/8 | 11.9 cm | 49.6 cm | 3.43 m | 20.3 m | 16.0 m | 0.7% |
Handheld & night-sky limits#
NPF assumes typical 20–24 MP sensors (≈6 µm pixels on full frame, ≈3.9 µm on APS-C, ≈3.3 µm on Micro Four Thirds).
| Body | Min. handheld shutter (longest focal) | 500 rule at 50 mm | NPF at 50 mm, f/1.8 |
|---|---|---|---|
| APS-C | 1/80 s | 7 s | 4 s |
| APS-C (Canon) | 1/80 s | 6 s | 3 s |
| Micro Four Thirds | 1/100 s | 5 s | 3 s |
Compatible cameras#
Bodies in our database with a native Sony / Minolta A-mount mount. Full-frame bodies switch to an APS-C crop with this lens.
- Sony Alpha 77 II 2014
- Sony Alpha 58 2013
- Sony Alpha 37 2012
- Sony Alpha 57 2012
- Sony Alpha 65 2011
- Sony Alpha 35 2011
- Sony Alpha 290 2010
- Sony Alpha 33 2010
- Sony Alpha 55 2010
- Sony Alpha 580 2010
- Sony Alpha 390 2010
- Sony Alpha 450 2010
- Sony Alpha 560 2010
- Sony Alpha 230 2009
- Sony Alpha 500 2009
- Sony Alpha 550 2009
- Sony Alpha 850 crop mode
- Sony Alpha 330 2009
- Sony Alpha 380 2009
- Sony Alpha 900 crop mode
- Sony Alpha 200 2008
- Sony Alpha 350 2008
- Sony Alpha 300 2008
- Sony Alpha 700 2007
- Sony Alpha 100 2006
- Konica Minolta Maxxum 5D 2005
- Konica Minolta Maxxum 7D 2004
- Minolta Maxxum 7000 crop mode
- Sony Alpha 77
- Sony Alpha 99 crop mode
- Sony α99 II crop mode
- Sony Alpha 68
- Pentax 645 crop mode
Adapt it to other systems#
Similar lenses#
Frequently asked questions#
Is the Sony DT 50mm f/1.8 SAM full frame?
No — it is designed for APS-C sensors. On a full-frame body it vignettes or triggers crop mode.
What is the Sony DT 50mm f/1.8 SAM equivalent to on APS-C?
Its focal length is already the real value for APS-C: 50 mm frames like 77 mm on full frame.
What is the Sony DT 50mm f/1.8 SAM good for?
As a portrait / short tele prime it suits head-and-shoulders portraits with flattering perspective and creamy backgrounds.
Sources & licences#
- Lensfun lens database — CC BY-SA 3.0
Last updated October 03, 2026 · How we calculate · Sources