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  • Sony 50mm f/1.8 SAM DT Lens for Sony Alpha Digital SLR Cameras
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Sony 50mm f/1.8 SAM DT Lens for Sony Alpha Digital SLR Cameras

by Sony
| 47 answered questions

Price: $168.00 & FREE Shipping. Details
Only 10 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
  • Small size, light weight portrait lens
  • 35mm focal length equivelant on APS-C; 75mm
  • Smooth and silent AF operation with built-in motor (SAM)
  • Closest focus distance: 1.1ft (0.34m); Maximum magnification: 0.2x
  • Please note: DT lenses are not recommended for use with the DSLR-A900

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Sony 50mm f/1.8 SAM DT Lens for Sony Alpha Digital SLR Cameras + Tiffen 49mm UV Protection Filter
Price for both: $174.30

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Technical Details

  • Brand Name: Sony
  • Model: SAL50F18
  • Lens Type: Prime lens
  • Minimum focal length: 50 mm
  • Maximum focal length: 50 mm
See more technical details

Read about our customers' top-rated lenses and cameras on our review pages: Lenses, Digital SLR Cameras, Compact System Cameras

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This item: Sony 50mm f/1.8 SAM DT Lens for Sony Alpha Digital SLR Cameras
Customer Rating (153) (68) (49) (46)
Price $ 168.00 $ 398.00 $ 448.00 $ 198.00
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com Amazon.com Amazon.com Amazon.com
Lens Prime lens Prime lens Prime lens Zoom lens
Maximum Sensor Size Compatibility APS-C / DX APS-C / DX 35mm FF APS-C / DX
Maximum Aperture Range F1.8 F1.8 F1.4 F4.0 - F5.6
Min Aperture 32 22 22 45
Photo Filter Thread Size 49 millimeters 49 millimeters 55 millimeters 62 millimeters
Minimum Operating Distance 0.34 meters 0.3 meters 0.45 meters 0.95 meters
Item Weight 0.37 pounds 0.34 pounds 0.49 pounds 0.67 pounds
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Product Details

  • Product Dimensions: 1.8 x 2.8 x 2.8 inches ; 5.9 ounces
  • Shipping Weight: 8.8 ounces (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S.
  • ASIN: B0029U0X24
  • Item model number: SAL50F18
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (153 customer reviews)
  • Date first available at Amazon.com: May 17, 2009

Product Description

Product Description

Step-up from the std. zoom kit lens and explore the world of portrait photography with the SAL50F18 lens. It has a large aperture which makes it easy to get those great portrait shots. The SAL50F18 is one of the first fixed focal length lenses in the DT series, which is designed exclusively for ? DSLRs that use an APS-C type sensor.

From the Manufacturer

Sony make . believe

DT 50mm F1.8 SAM Prime Lens

Step-up from the std. zoom kit lens and explore the world of portrait photography with the SAL50F18 lens. It has a large aperture which makes it easy to get those great portrait shots. The SAL50F18 is one of the first fixed focal length lenses in the DT series, which is designed exclusively for α DSLRs that use an APS-C type sensor.

DT 50mm F1.8 SAM Prime Lens

Technology

Circular Aperture
Distance encoder
SAM (Smooth Autofocus Motor)

Circular Aperture

When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh’ effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. α lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result.

Distance encoder

The distance encoder plays an integral part in ADI flash metering, which delivers high precision flash metering that is unaffected by the reflectance of subjects or backgrounds. The distance encoder is a lens component that directly detects the position of the focusing mechanism, and sends a signal to the CPU in order to measure distance to the subject. During flash photography, this data is very useful in calculating how much flash output is appropriate to the scene.

SAM (Smooth Autofocus Motor)

Rather than using the focus drive motor in the camera body, SAM lenses feature an autofocus motor built into to the lens itself that directly drives the focusing element group. Since the built-in motor directly rotates the focus mechanism, operation is significantly smoother and quieter than conventional coupled autofocus drive systems.

Sony make . believe

2009 Sony Electronics Inc. All rights reserved. Reproduction in whole or in part without written permission is prohibited. Sony, α and HDNA, are trademarks of Sony. All other trademarks are trademarks of their respective owners. Non-metric weights and measurements are approximate and may vary.

Customer Reviews

It is plastic, but feels well constructed to me so far.
Amazon Customer
My family portraits now pop with sharpness, great depth and bokeh.
Rick
Shutter speed indoors using just natural light (no flash!)
Christopher J. Jurado

Most Helpful Customer Reviews

145 of 148 people found the following review helpful By Christopher J. Jurado on July 17, 2009
Verified Purchase
Things I like:
1. Sharp and great colors! I've been using my kit lens for a while, and I wanted a lens for portraits. The quality of the images make it my preferred lens, and I only resort to my kit zoom lenses during events where I am unable to get close.
2. Light. Agreed that it is mostly plastic, but it is sturdy and looks good. I do not regret this purchase at all due to build quality.
3. Fast! Indoor photos can be shot by hand with natural light due to the large f1.8 aperture. Built in steady shot in every Sony Alpha makes this even better. Shutter speed indoors using just natural light (no flash!) shooting away from the windows can range between 1/8 to 1/120 of a second from ISO 100 to 400. Moving to higher ISO values (which my zooms would have done in order to get similar shots) would probably match the speed, but would have introduced much more noise.
4. Smooth bokeh. None of this hexagonal stuff you see in other lenses.

Things I don't like.
1. AF/MF switch. I have one on my camera, I don't need one on my lens. In order to attain full manual focus I need to swith both the lens and body.
2. 49mm filters. Why not the usual 55mm?
3. Not full frame. If you don't own an A900, and don't ever plan of upgrading to one - this doesn't matter to you.

I would recommend this lens to EVERYONE! It is cheap, and the quality of the images are superb! Furthermore, the fixed focal length forces a photographer to be more aware of how he/she is composing photographs. The lazy method of zooming in and out to fit the subject is no longer applicable. You have to move, and take into consideration objects around the subject. So in the end - you will be a better photographer - or a frustrated one due to the lack of zoom.
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74 of 77 people found the following review helpful By Marcin Moka on July 19, 2010
Bombarded with messages that switching to a prime will make you a better photographer, I was skeptical at first, but ultimately made the plunge.

All I can say is : wow. This lens, coupled with a Minolta f/4 (i.e. The Beercan) made me re-evaluate what my Sony a200 was capable of.

Sharp as a tack, highly capable in low light situations, punchy yet accurate colour reproduction, bokeh as smooth as butter.. and all this for less than $200? Granted, it's no Zeiss f/1.4, but it doesn't cost nearly as much either.

As an added bonus, it truly will make you a better photographer in that you will now pay infinitely more attention to framing the shot.

On a side note, I was actually impressed as to the build quality. While it is made of plastic, the fit and feel seemed considerably higher than the equivalent Canon 50mm f/1.8 Mk II and seemed smoother in AF. I guess Sony has a reputation to establish.

I also compared it to the oft-used Minolta 50 mm f/1.7. And while it pales in build quality to the venerable Minolta, I was pleasantly surprised to discover the Sony yielding much sharper images than the Minolta.
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17 of 17 people found the following review helpful By Dad2014 on May 11, 2012
Verified Purchase
Camera Used: SONY a65

PROS

Fantastic lense for taking portrait pictures. The nice blurred/soft background is superb! However, do keep in mind there is no zoom on this lense (yes, zero zoom). This is a great lense for indoor use as it lets a lot of light come into the sensor. Much better than the lense kit that comes with the SONY a65. A great use of this would be for taking baby pictures.

CONS

NOT for videos. This lense makes too much noise that during video recording you will hear a "clicking" type sound as it tries to focus. Definately not recommended and you will get annoyed during playback. Stick with the lense kit that comes with your SONY a65.

SUMMARY

If you plan to take ONLY pictures, this lense is a great buy for the price. It truly is. But if you plan to take videos and pictures, stick with the kit lense of your SONY a65 (or just remember to swap the lense). Picture quality-wise, the lense kit is not as good as this lense for portrait pictures. It's hard to describe, but more light comes in, so the pictures comes out looking better. And the blurred/soft background is fantastic on this lense. I'm keeping this lense. I can live with switching to my general purpose lense kit for videos and then switching back to this lense for really SUPERB portrait shots which is what I want to do 90% of the time anyway.

UPDATE: July 5, 2012
Updating my rating from a 4 star to 5 star because this lense survived a fall. My Sony a65, which was mounted on a tripod and set to eye-level, had this lense attached to it when it was knocked over by someone and the whole tripod fell on the hospital floor. The camera landed lense first. Both the lense and camera survived.

5 star rating for excellent picture quality and for durability!
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29 of 32 people found the following review helpful By Joseph Charles on April 19, 2011
Verified Purchase
This lens is superb for showing Depth Of Field and portraits without a flash. I've read reviews that stated the lens is made of plastic ... it is actually made of aluminum. This lens was specifically designed for the Sony alpha series of DSLR cameras. I struggled between the 1.4, 50mm lens and this one and this won out. I am in no way disappointed in my choice ... I saved some money for my next lens and I'm happy with the photographs produced through this lens.
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