Sony 28-75mm f/2.8 SAM

Sony 28-75mm f/2.8 SAM

Lens Summary

Brand: Sony

Also Known As: Sony 28-75mm f/2.8

Lens Type: Zoom Lens

Format: Full Frame / FX

Focus: Autofocus

Lens Mount: Sony Alpha

Release Date: 2009-08-27

MSRP Price: $898

Made in: Japan

Infrared Rating: Good

Production Status: In Production

Lens Description: If you use a 35mm full frame or an APS-C format camera, this award-winning lens offers an ideal balance of brightness, zoom range and image quality for a wide range of situations you're likely to encounter in everyday shooting. The fact that it features a constant, bright F2.8 maximum aperture at all focal lengths offers significant advantages for hand held and low light shooting, as well as for creating gorgeous defocused backgrounds.

Sony 28-75mm f/2.8 SAM Specifications

Lens Specifications
Lens TypeZoom Lens
Focal Length28-75mm
Mount TypeSony Alpha
FormatFull Frame / FX
Compatible Format(s)35mm Film / Full-Frame Digital Sensor DSLR (APS-C Sensor)
Compatible with TeleconvertersNo
Zoom Ratio2.67x
Maximum Reproduction Ratio1:4.5
Optical SteadyShot / AntiShake (Image Stabilization)No
Aperture Information
Aperture RingNo
Maximim Aperturef/2.8
Minimum Aperturef/32
Maximum Angle of View (Full frame or larger format)75°-32°
Optical Information
Lens Elements16
Lens Groups14
Diaphragm Blades7
Focus Information
Built-in Focus MotorYes
Direct Drive Super Sonic wave Motor (DDSSM)Yes
Internal FocusingYes
Minimum Focus Distance0.38m
Distance InformationYes
Filter Information
Filter Size67mm
Accepts Filter TypeScrew-on
Physical Characteristics
Weather / Dust SealingNo
Mount MaterialMetal
Dimensions7.75 x 9.40cm
Other Information
Available in ColorsBlack

Lens Construction and MTF Chart

Sony 28-75mm f/2.8 SAM MTF and Diagram


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Lee Davenport

I was new to full frame cameras when I purchased a Sony A99; this lens was available at a discount. I was satisfied with the lens performance, but would frequently read from the “experts” that the Zeiss 24-70 f/2.8 SSM was a better lens. Believing the experts, I bought the Zeiss with the intention of selling the 28-75. While waiting to sell my lens, I made a comparison using my own unscientific methods. I took various photos indoor/outdoor under identical conditions and found the lenses are very very close in image quality. If fact, the 28-75 frequently gave slightly better image quality at 28mm (not always) with the Zeiss giving slightly better image quality at 50mm & 70mm (not always). Frequently heavy duty pixel peeping was necessary to tell the difference; often there was none. The Zeiss contrast was consistently better than this lens. In the corners the Zeiss was consistently softer. As a result of closely examining hundreds of images, I sent the Zeiss back. I didn’t need two lenses that were nearly identical. If I had to do it over again I would have looked closely at the Tamron 28-75 f/2.8.
In this comparison, I included an old $85 Minolta 50mm f/1.7 lens. The Minolta is way too soft at f/1.7 but is very sharp between f/4.0 & f/8.0, better than both these lenses at the same f stops. Go figure.