Home Lenses Sony DT 50mm F1.8 SAM Sony
Released June 2009
A 170 g APS-C A-mount short-telephoto prime with F1.8 aperture and a built-in SAM autofocus motor.
Compare with another lens Compare with… Sony DT 35mm F1.8 SAM (2010) Sony DT 30mm F2.8 Macro SAM (2009) Sony 50mm F1.4 (2006) RF 20-50mm F4L IS USM PZ (2026) RF 14mm F1.4L VCM (2026) RF 7-14mm F2.8-3.5L FISHEYE STM (2026) RF 45mm F1.2 STM (2025) RF 85mm F1.4L VCM (2025) RF 75–300mm F4–5.6 (2025) RF 20mm F1.4 L VCM (2025) RF-S 14–30mm F4–6.3 IS STM PZ (2025) RF 16–28mm F2.8 IS STM (2025) RF 24mm F1.4 L VCM (2024) RF 50mm F1.4 L VCM (2024) RF 70-200mm F2.8L IS USM Z (2024) RF 28–70mm F2.8 IS STM (2024) RF 35mm F1.4 L VCM (2024) RF 200–800mm F6.3–9 IS USM (2023) RF 24-105mm F2.8 L IS USM Z (2023) RF-S 10–18mm F4.5–6.3 IS STM (2023) RF 10–20mm F4 L IS STM (2023) RF 28mm F2.8 STM (2023) RF 100–300mm F2.8L IS USM (2023) RF 24–50mm F4.5–6.3 IS STM (2023) RF-S 55–210mm F5–7.1 IS STM (2023) RF 135mm F1.8 L IS USM (2023) RF 15–30mm F4.5–6.3 IS STM (2022) RF 24mm F1.8 MACRO IS STM (2022) RF-S 18–150mm F3.5–6.3 IS STM (2022) RF-S 18–45mm F4.5–6.3 IS STM (2022) RF 1200mm F8L IS USM (2022) RF 800mm F5.6L IS USM (2022) RF 100–400mm F5.6–8 IS USM (2021) RF 16mm F2.8 STM (2021) RF 14–35mm F4 L IS USM (2021) RF 100mm F2.8 L Macro IS USM (2021) RF 400mm F2.8L IS USM (2021) RF 600mm F4L IS USM (2021) RF 70–200mm F4 L IS USM (2021) RF 50mm F1.8 STM (2020) RF 85mm F2 MACRO IS STM (2020) RF 100–500mm F4.5–7.1L IS USM (2020) RF 600mm F11 IS STM (2020) RF 800mm F11 IS STM (2020) RF 24–105mm F4–7.1 IS STM (2020) RF 85mm F1.2 L USM DS (2019) RF 70–200mm F2.8 L IS USM (2019) RF 15–35mm F2.8 L IS USM (2019) RF 24–240mm F4–6.3 IS USM (2019) RF 24–70mm F2.8L IS USM (2019) RF 85mm F1.2 L USM (2019) RF 28–70mm F2 L USM (2018) RF 35mm F1.8 MACRO IS STM (2018) RF 24–105mm F4L IS USM (2018) RF 50mm F1.2 L USM (2018) EF 70–200mm f/2.8L IS III USM (2018) EF 70–200mm f/4L IS II USM (2018) EF 85mm f/1.4L IS USM (2017) EF-S 35mm f/2.8 Macro IS STM (2017) EF-S 18–55mm f/4–5.6 IS STM (2017) EF 16–35mm f/2.8L III USM (2016) EF-S 18–135mm f/3.5–5.6 IS USM (2016) EF 24–105mm f/4L IS II USM (2016) EF 35mm f/1.4L II USM (2015) EF 50mm f/1.8 STM (2015) EF 24–105mm f/3.5–5.6 IS STM (2014) EF-S 24mm f/2.8 STM (2014) EF-S 10–18mm f/4.5–5.6 IS STM (2014) EF-S 55–250mm f/4–5.6 IS STM (2013) EF-S 18–55mm f/3.5–5.6 IS STM (2013) EF 24–70mm f/4L IS USM (2012) EF 35mm f/2 IS USM (2012) EF 24–70mm f/2.8L II USM (2012) EF 24mm f/2.8 IS USM (2012) EF 28mm f/2.8 IS USM (2012) EF-S 18–135mm f/3.5–5.6 IS STM (2012) EF-S 55–250mm f/4–5.6 IS II (2011) EF-S 18–55mm f/3.5–5.6 III (2011) EF-S 18–55mm f/3.5–5.6 IS II (2011) EF 70–200mm f/2.8L IS II USM (2010) EF 100mm f/2.8L Macro IS USM (2009) EF-S 15–85mm f/3.5–5.6 IS USM (2009) EF-S 18–135mm f/3.5–5.6 IS (2009) EF 24mm f/1.4L II USM (2008) EF-S 18–200mm f/3.5–5.6 IS (2008) EF-S 55–250mm f/4–5.6 IS (2007) EF-S 18–55mm f/3.5–5.6 IS (2007) EF 50mm f/1.2L USM (2007) EF 16–35mm f/2.8L II USM (2007) EF 70–200mm f/4L IS USM (2006) EF-S 17–55mm f/2.8 IS USM (2006) EF 85mm f/1.2L II USM (2006) EF-S 18–55mm f/3.5–5.6 II (2005) EF-S 18–55mm f/3.5–5.6 II USM (2005) EF-S 60mm f/2.8 Macro USM (2005) EF 24–105mm f/4L IS USM (2005) EF-S 10–22mm f/3.5–4.5 USM (2004) EF-S 17–85mm f/4–5.6 IS USM (2004) EF-S 18–55mm f/3.5–5.6 USM (2003) EF 24–70mm f/2.8L USM (2002) EF 16–35mm f/2.8L USM (2001) EF 70–200mm f/2.8L IS USM (2001) EF 100mm f/2.8 Macro USM (2000) EF 70–200mm f/4L USM (1999) EF 35mm f/1.4L USM (1998) EF 24mm f/1.4L USM (1997) EF 135mm f/2L USM (1996) EF 200mm f/2.8L II USM (1996) EF 28mm f/1.8 USM (1995) EF 70–200mm f/2.8L USM (1995) EF 50mm f/1.4 USM (1993) EF 85mm f/1.8 USM (1992) EF 200mm f/2.8L USM (1991) EF 50mm f/1.8 II (1990) EF 35mm f/2 (1990) EF 100mm f/2.8 Macro (1990) EF 80–200mm f/2.8L (1989) EF 85mm f/1.2L USM (1989) EF 24mm f/2.8 (1988) EF 28mm f/2.8 (1987) EF 50mm f/1.8 (1987) NIKKOR Z 70–200mm f/2.8 VR S II (2026) NIKKOR Z 24–105mm f/4–7.1 (2026) NIKKOR Z DX 16–50mm f/2.8 VR (2025) NIKKOR Z DX MC 35mm f/1.7 (2025) NIKKOR Z 24-70mm f/2.8 S II (2025) NIKKOR Z 28-135mm f/4 PZ (2025) NIKKOR Z 35mm f/1.2 S (2025) NIKKOR Z 50mm f/1.4 (2024) NIKKOR Z 35mm f/1.4 (2024) NIKKOR Z 28-400mm f/4-8 VR (2024) NIKKOR Z 135mm f/1.8 S Plena (2023) NIKKOR Z 600mm f/6.3 VR S (2023) NIKKOR Z 180-600mm f/5.6-6.3 VR (2023) NIKKOR Z 70-180mm f/2.8 (2023) NIKKOR Z DX 24mm f/1.7 (2023) NIKKOR Z DX 12-28mm f/3.5-5.6 PZ VR (2023) NIKKOR Z 26mm f/2.8 (2023) NIKKOR Z 85mm f/1.2 S (2023) NIKKOR Z 600mm f/4 TC VR S (2022) NIKKOR Z 17-28mm f/2.8 (2022) NIKKOR Z 400mm f/4.5 VR S (2022) NIKKOR Z 800mm f/6.3 VR S (2022) NIKKOR Z 400mm f/2.8 TC VR S (2022) NIKKOR Z 28-75mm f/2.8 (2022) NIKKOR Z 100-400mm f/4.5-5.6 VR S (2021) NIKKOR Z 24-120mm f/4 S (2021) NIKKOR Z DX 18-140mm f/3.5-6.3 VR (2021) NIKKOR Z 40mm f/2 (2021) NIKKOR Z 28mm f/2.8 (2021) NIKKOR Z MC 105mm f/2.8 VR S (2021) NIKKOR Z MC 50mm f/2.8 (2021) NIKKOR Z 50mm f/1.2 S (2020) NIKKOR Z 14-24mm f/2.8 S (2020) NIKKOR Z 24-50mm f/4-6.3 (2020) NIKKOR Z 70-200mm f/2.8 VR S (2020) NIKKOR Z 24-200mm f/4-6.3 VR (2020) NIKKOR Z 20mm f/1.8 S (2020) NIKKOR Z DX 16-50mm f/3.5-6.3 VR (2019) NIKKOR Z DX 50-250mm f/4.5-6.3 VR (2019) NIKKOR Z 58mm f/0.95 S Noct (2019) NIKKOR Z 24mm f/1.8 S (2019) NIKKOR Z 85mm f/1.8 S (2019) NIKKOR Z 24-70mm f/2.8 S (2019) NIKKOR Z 14-30mm f/4 S (2019) NIKKOR Z 50mm f/1.8 S (2018) NIKKOR Z 24-70mm f/4 S (2018) NIKKOR Z 35mm f/1.8 S (2018) AF-S NIKKOR 500mm f/5.6E PF ED VR (2018) AF-S NIKKOR 180-400mm f/4E TC1.4 FL ED VR (2018) AF-S NIKKOR 28mm f/1.4E ED (2017) AF-S NIKKOR 70–200mm f/2.8E FL ED VR (2016) AF-S NIKKOR 105mm f/1.4E ED (2016) AF-S NIKKOR 24-70mm f/2.8E ED VR (2015) AF-S NIKKOR 200–500mm f/5.6E ED VR (2015) AF-S NIKKOR 24mm f/1.8G ED (2015) AF-S NIKKOR 500mm f/4E FL ED VR (2015) AF-S NIKKOR 600mm f/4E FL ED VR (2015) AF-S NIKKOR 20mm f/1.8G ED (2014) AF-S NIKKOR 400mm f/2.8E FL ED VR (2014) AF-S DX NIKKOR 18–300mm f/3.5–6.3G ED VR (2014) AF-S NIKKOR 35mm f/1.8G ED (2014) AF-S DX NIKKOR 18-140mm f/3.5-5.6G ED VR (2013) AF-S NIKKOR 800mm f/5.6E FL ED VR (2013) AF-S NIKKOR 28mm f/1.8G (2012) AF-S NIKKOR 85mm f/1.8G (2012) AF-S DX Micro NIKKOR 40mm f/2.8G (2011) AF-S NIKKOR 50mm f/1.8G (2011) AF-S NIKKOR 35mm f/1.4G (2010) AF-S NIKKOR 24–120mm f/4G ED VR (2010) AF-S NIKKOR 85mm f/1.4G (2010) AF-S NIKKOR 24mm f/1.4G ED (2010) AF-S NIKKOR 16–35mm f/4G ED VR (2010) AF-S DX NIKKOR 35mm f/1.8G (2009) AF-S NIKKOR 50mm f/1.4G (2008) AF-S NIKKOR 14–24mm f/2.8G ED (2007) FE 400mm F4.5 GM OSS (2026) FE 600mm F6.3 GM OSS (2026) FE 8–14mm F3.5 Fisheye G (2026) FE 100–400mm F5.6–8 OSS (2026) FE 100–400mm F4.5 GM OSS (2026) FE 28-70mm F3.5-5.6 OSS II (2026) FE 100mm F2.8 Macro GM OSS (2025) FE 50–150mm F2 GM (2025) FE 16mm F1.8 G (2025) FE 400–800mm F6.3–8 G OSS (2025) FE 28–70mm F2 GM (2024) FE 85mm F1.4 GM II (2024) E PZ 16-50mm F3.5-5.6 OSS II (2024) FE 16-25mm F2.8 G (2024) FE 24-50mm F2.8 G (2024) FE 300mm F2.8 GM OSS (2024) FE 16–35mm F2.8 GM II (2023) FE 70-200mm F4 Macro G OSS II (2023) FE 50mm F1.4 GM (2023) FE 20-70mm F4 G (2023) E 11mm F1.8 (2022) E 15mm F1.4 G (2022) E PZ 10-20mm F4 G (2022) FE 24–70mm F2.8 GM II (2022) FE PZ 16-35mm F4 G (2022) FE 70–200mm F2.8 GM OSS II (2021) FE 14mm F1.8 GM (2021) FE 24mm F2.8 G (2021) FE 40mm F2.5 G (2021) FE 50mm F1.2 GM (2021) FE 50mm F2.5 G (2021) FE 35mm F1.4 GM (2021) FE 28-60mm F4-5.6 (2020) FE 12-24mm F2.8 GM (2020) FE 20mm F1.8 G (2020) E 70-350mm F4.5-6.3 G OSS (2019) E 16-55mm F2.8 G (2019) FE 35mm F1.8 (2019) FE 200-600mm F5.6-6.3 G OSS (2019) FE 600mm F4 GM OSS (2019) FE 135mm F1.8 GM (2019) FE 24mm F1.4 GM (2018) FE 400mm F2.8 GM OSS (2018) E 18-135mm F3.5-5.6 OSS (2018) FE 24-105mm F4 G OSS (2017) FE 100-400mm F4.5-5.6 GM OSS (2017) FE 12-24mm F4 G (2017) FE 16-35mm F2.8 GM (2017) FE 100mm F2.8 STF GM OSS (2017) FE 85mm F1.8 (2017) E PZ 18-110mm F4 G OSS (2016) FE 50mm F2.8 Macro (2016) FE 70-200mm F2.8 GM OSS (2016) Planar T* FE 50mm F1.4 ZA (2016) FE 50mm F1.8 (2016) FE 70-300mm F4.5-5.6 G OSS (2016) FE 24-70mm F2.8 GM (2016) FE 85mm F1.4 GM (2016) FE 90mm F2.8 Macro G OSS (2015) Distagon T* FE 35mm F1.4 ZA (2015) FE 24-240mm F3.5-6.3 OSS (2015) FE 28mm F2 (2015) FE PZ 28-135mm F4 G OSS (2014) Vario-Tessar T* FE 16-35mm F4 ZA OSS (2014) FE 70-200mm F4 G OSS (2014) Vario-Tessar T* FE 24-70mm F4 ZA OSS (2014) E PZ 18-105mm F4 G OSS (2013) Sonnar T* FE 55mm F1.8 ZA (2013) 70-200mm F2.8 G SSM II (2013) Sonnar T* FE 35mm F2.8 ZA (2013) Vario-Tessar T* E 16-70mm F4 ZA OSS (2013) Planar T* 50mm F1.4 ZA SSM (2013) E 20mm F2.8 (2013) E 10-18mm F4 OSS (2012) E 35mm F1.8 OSS (2012) E PZ 18-200mm F3.5-6.3 OSS (2012) E 18-200mm F3.5-6.3 OSS LE (2012) E 50mm F1.8 OSS (2011) Sonnar T* E 24mm F1.8 ZA (2011) DT 16–50mm F2.8 SSM (2011) E 55-210mm F4.5-6.3 OSS (2011) E 30mm F3.5 Macro (2011) E 16mm F2.8 (2010) Vario-Sonnar T* 16-35mm F2.8 ZA SSM (2009) Vario-Sonnar T* 24–70mm F2.8 ZA SSM (2008) Vario-Sonnar T* DT 16–80mm F3.5–4.5 ZA (2007) Planar T* 85mm F1.4 ZA (2006) Sonnar T* 135mm F1.8 ZA (2006) 70–200mm F2.8 G (2006) 50mm F2.8 Macro (2006)
Mount Sony A
Focal length 50 mm
Max aperture f/1.8
Stabilisation –
Weight 170 g What reviewers say Both tests find strong central detail, low lateral colour fringing and wide-open corner shading that improves by F2.8. OpticalLimits finds strong stopped-down edges on an Alpha700; Photo Review finds softer edges using an Alpha850. Both describe audible autofocus and light plastic construction. OpticalLimits also finds longitudinal colour fringing and no direct manual focusing; Photo Review finds close-background blur busier than distant backgrounds.
From photozone.de , photozone.de and photoreview.com.au
Optics
Lens type Prime
Focal length 50 mm
Maximum aperture f/1.8
Minimum aperture f/22
Optical construction Six elements in five groups
Diaphragm Seven blades; circular aperture
Angle of view 32° on APS-C Mount and compatibility
Mounts Sony A
Image circle APS-C
Image circle detail Designed for APS-C A-mount cameras; 75 mm equivalent field of view
Teleconverter support Sony 1.4× and 2× teleconverters unsupported Focus and stabilisation
Autofocus Yes
Minimum focus distance 0.34 m
Maximum magnification 0.2×
Autofocus detail Built-in SAM (Smooth Autofocus Motor); direct manual focusing unsupported (OpticalLimits)
Focus distance detail Focus ring rotates during autofocus and the inner barrel extends when focusing (OpticalLimits)
Magnification detail 0.20× maximum reproduction ratio
Stabilisation detail Sony describes use with A-mount camera-body stabilisation Design
Filter diameter 49 mm
Maximum diameter 70 mm
Length 45 mm
Weight 170 g
Controls AF/MF switch (Photo Review)
Filter detail 49 mm non-rotating filter thread (OpticalLimits)
Dimensions detail 70 mm maximum diameter × 45 mm length
Weight detail Approximately 170 g, maker lens weight
Lens hood No lens hood supplied
Release detail Sony specifies 25 June 2009 availability in Japan; its US announcement describes July availability. Pros and cons Pros + F1.8 maximum aperture+ 170 g lens weight+ 0.34 m minimum focusCons − APS-C coverage only− Plastic lens mount
