Sony DT 50mm F1.8 SAM vs Sony E 50mm F1.8 OSS
Better figure, where one is clearly better
| SonyDT 50mm F1.8 SAM | SonyE 50mm F1.8 OSS | |
|---|---|---|
| Overview | ||
| Released | June 2009 | December 2011 |
| Optics | ||
| Lens type | Prime | Prime |
| Focal length | 50 mm | 50 mm |
| Maximum aperture | f/1.8 | f/1.8 |
| Minimum aperture | f/22 | f/22 |
| Optical construction | Six elements in five groups | Nine elements in eight groups |
| Diaphragm | Seven blades; circular aperture | Seven rounded blades |
| Angle of view | 32° on APS-C | 32° APS-C |
| Mount and compatibility | ||
| Mounts | Sony A | Sony E |
| Image circle | APS-C | APS-C |
| Image circle detail | Designed for APS-C A-mount cameras; 75 mm equivalent field of view | APS-C coverage; 75 mm equivalent field of view |
| Teleconverter support | Sony 1.4× and 2× teleconverters unsupported | Not compatible with Sony E-mount teleconverters |
| Focus and stabilisation | ||
| Autofocus | Yes | Yes |
| Minimum focus distance | 0.34 m | 0.39 m |
| Maximum magnification | 0.2× | 0.16× |
| Optical stabilisation | – | Yes |
| Autofocus detail | Built-in SAM (Smooth Autofocus Motor); direct manual focusing unsupported (OpticalLimits) | Internal motor and internal focusing; no specific drive designation published in read maker feature page |
| Focus distance detail | Focus ring rotates during autofocus and the inner barrel extends when focusing (OpticalLimits) | 0.39 m minimum focus; electronically coupled manual-focus ring |
| Magnification detail | 0.20× maximum reproduction ratio | 0.16× maximum magnification |
| Stabilisation detail | Sony describes use with A-mount camera-body stabilisation | Optical SteadyShot; Sony specifies approximately four stops, not guaranteed under every shooting condition |
| Design | ||
| Filter diameter | 49 mm | 49 mm |
| Maximum diameter | 70 mm | 62 mm |
| Length | 45 mm | 62 mm |
| Weight | 170 g (better) | 202 g |
| Controls | AF/MF switch (Photo Review) | Manual-focus ring; focus mode and optical stabilisation selected on the camera |
| Filter detail | 49 mm non-rotating filter thread (OpticalLimits) | – |
| Dimensions detail | 70 mm maximum diameter × 45 mm length | 62 mm maximum diameter × 62 mm length; aluminium-alloy exterior and internal focusing |
| Weight detail | Approximately 170 g, maker lens weight | Approximately 202 g lens; separate hood and caps excluded |
| Lens hood | No lens hood supplied | ALC-SH116 round bayonet hood |
| In the box | – | ALC-SH116 hood, front cap and rear cap; no case listed |
| Release detail | Sony specifies 25 June 2009 availability in Japan; its US announcement describes July availability. | Photography Blog’s contemporaneous 24 August 2011 US-price launch report specifies December availability; Imaging Resource’s later exact review corroborates end of 2011 release. Sony Japan delayed its local launch after Thai floods and finally specified 9 March 2012. Exact global first day unconfirmed. Sony Hong Kong added the black finish from September 2013; it is a colour configuration, not another generation. Two full independent reviews: Sony Alpha Lab Jay on NEX-5N, mostly corrected JPEG samples, and Sony Alpha Blog Marc Alhadeff on Alpha 6000. Their corner-sharpness judgments differ across bodies/tests. Unconfirmed ED glass/motor subtype in third-party descriptions omitted |
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