Why did sony omit oss image stability on this lens? with oss the speed can be reduced on a kit lenses to accomplish 20mm @ f2.8.

I think you may be misunderstanding the benefits of OSS on a wide-angle prime lens. The wider the angle, the less the effect of camera shake on the image. OSS (and other stabilizing hardware/software) are most beneficial for long and/or zoom lenses. So, in other words, adding the cost, size, weight and complexity of the OSS hardware to the 20mm lens is not needed and thus adding it would far outweigh any advantages. I've taken hundreds of pictures with my 20mm (and the two adapters which make its field of view even wider) in all kinds of lighting (bright to dim) and I've never had reason to worry about camera shake. There's a technical reason why which I'll try to explain below. I have to ask...do you own a Sony camera that uses E-mount lenses? Do you own this lens? Have you ever taken photos with it? And finally, why do you ask the question? Your comment that "with oss the speed can be reduced on a kit lenses to accomplish 20mm @ f2.8" really makes no sense at all. The 20mm is not a "kit lens" and reducing the shutter speed (longer exposure) does not "accomplish" an aperture of f2.8. The bigger the aperture, the more the shutter speed can be increased (for a shorter exposure to allow the same amount of light to reach the sensor). I'm pointing out all this information because I felt the need to illustrate that your original question, and BoJo's answer, are both misleading. I hope the time I've taken to make these comments is useful to you or someone else. The SEL-20F28 is a fine prime wide-angle lens and due to that wide angle, it doesn't need OSS. There was no "omission" of a feature due to cost; there was no need for the feature. Perhaps that's the simplest answer to your question.If you look at the full line of Sony E-mount lenses, you'll see that the OSS feature is not included in the two primes below 30mm (the SEL-20F2.8 and the macro lens SEL-30M35); above that prime range and in ALL zoom lenses (which have much longer reach and narrower field of view the OSS feature is included. For example, in the prime lenses, the SEL-50F18 and SEL-35F1.8 have OSS, All the zoom lenses (e.g., SEL-18105GPZ, the SEL-1650PZ the kit lens, the SEL-55-210, etc.) have OSS because the longer the lens (i.e.., the narrower the field of view and the more magnification, the more camera shake becomes an issue). The issue is whether a lens needs the OSS at its focal range, not whether Sony decided to save money (i.e., make the lens cost less to buy--which does not necessarily equate to saving money for the manufacturer). I hope this extra bit of technical explanation helps. By the way, I think the ideas in the answer you got from "BoJo" to your question are both true and misleading because they omit the issue of field of view and its effect on camera shake. In other words, the comments are not "educated" in the sense of understanding photographic concepts and technology. BoJo's comments all relate to cost, profit margins and referring to competing camera models/makes that incorporate an anti-shake feature into the camera bodies (perhaps like Sony's Alpha line that are not "mirrorless" such as the A58 and A77II). In the "mirrorless" line of Sony Alpha cameras (with the exception of the new, bigger Full Frame A7II line) there's no room for OSS hardware in the camera body (hence the addition of OSS to the lenses), There's really no need to "ask Sony" this question; you just need to know something about lens technology that applies to all lenses regardless of their manufacturer.BoJo remarks that "(in-camera stabilization is) one of the clever advantages that camera makers who incorporate OSS into their camera bodies." That's true (and why the FE A7II line now has in-camera OSS), but the issue of the necessary increase in size of the camera body was not mentioned by BoJo. As another example, the Nikon 1 line of mirrorless cameras (a really small line of cameras with a 1-inch sensor) also use in-lens stabilization (Nikon calls it "VR" for vibration reduction) for exactly the reason I've explained...adding stabilization to the camera body makes the body much bigger, more expensive and more complex. Good luck.

What's the equivalent focus length in APS-C frame?

Sony NEX/alpha cameras are 1.5x crop factor so you multiply 20mm x 1.5 factor to get a 30mm full frame (35mm film) equivalent lens which is a medium wife angle lens. Good for general street photography.

How much flatter is this one vs the 16mm 2.8?

As far as I can tell they are the same housing size. This one has upgraded optics compared to the 16mm.

Does it have Optical Stabilisation?

If your question is about Image Stabilization. The lens does not have this feature.

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Description

📸 Elevate your frame, own the moment.

BRIGHT F 2 8 APERTURE - Capture sharp, vibrant images even in low light—your creative edge for moody, professional shots.
CRISP WIDE ANGLE MASTERY - 70° angle of view perfectly frames expansive landscapes and dynamic cityscapes with stunning clarity.
OPTIMIZED OPTICAL DESIGN - 6-element, 6-group lens configuration ensures minimal distortion and maximum image fidelity.
ULTRA PORTABLE PRECISION - Sleek 2.5-inch diameter and featherlight 69g weight for effortless carry and quick shots on the go.
SONY E MOUNT COMPATIBILITY - Seamlessly integrates with your Sony APS-C mirrorless camera for instant, reliable performance.

The Sony SEL20F28 is a compact, lightweight 20mm wide-angle prime lens designed for Sony E-mount APS-C cameras. Featuring a bright f/2.8 aperture and a 70° angle of view, it delivers sharp, vibrant images with minimal distortion thanks to its 6-element optical design. Perfect for professionals and enthusiasts seeking portability without compromising image quality.

Specifications

Brand	Sony
Model Number	SEL20F28
Model Year	2013
Optical Zoom Range	0.12 x
Lens Fixed Focal Length	20 Millimeters
Focal Length (wide)	20 Millimeters
Focal Length (tele)	20 Millimeters
Aperture (wide)	2.8 Millimeters
Min. Aperture (tele)	22.0
Lens type	Monofocal Lens
Type	Wide Angle Lens
Filter Size	49mm
Lens Configuration	6 pieces in 6 groups
Lens Mount	Sony E
Image Stabilization	No
Lens Motor Type	DCモーター
Batteries Included	No
Manufacturer Warranty Description Labor	Included
Manufacturer Warranty Description Parts	Manufacturer Warranty: 1 Year
Product Dimensions	2 x 6.3 x 6.3 cm; 69 g

Reviews

通**～

小型軽量かつボケ味が柔らかい。

やはりF2.8の明るいレンズの為、ボケ味が優秀。パンケーキらしい小型軽量で、16-50mmのパンケーキズームとは、一線を画す画質の良さ。ある程度絞ると、シャープな絵が撮れるので、これと18-200mmの望遠ズームの2本で運用できる。カメラはα6400であるが、相性も抜群である。総合評価：★★★★★

2.02.2025

頭**隊

単焦点でもAFはありがたい

価格の割に写りも良く、寄れる使い勝手のいいレンズです。単焦点でもさっと撮せるAFはありがたい。

18.01.2024

A**ー

割り切って使えば

フルサイズで使用する予定で購入しました。APS−Cなので画質面は期待していませんでしたが、やはり軽くて小さいパンケーキレンズは使い勝手が良いですね。諸々割り切って使えば良いレンズだと思います。そしてSonyさんに「もうそろそろフルサイズのパンケーキレンズを発売して欲しい」と切に願います。結構需要あると思いますけどね〜

27.01.2025

H**C

薄くて使い勝手はいい

パンケーキレンズは持ち運び重視なので薄くて良いです、フィルターも49mmですので多くのEマウントレンズで使い廻しできます。ただし、レンズフードは持ち味の薄型を壊してしまいますので利用は少ないでしょう

29.07.2014

小**色

明るいパンケーキレンズ

軽いコンパクトなレンズで持ち運びが容易、室内でも使えるので一番稼働率が高い、16mmでは広角過ぎたので買い直しました。

9.06.2023

素**ん

使いイイ。

カメラ素人の意見ですが、高画質の “写ルンです” 感覚で使える。望遠レンズを持っているならこのレンズも持っておきたいレンズだと思う。

3.06.2018

A**A

標準パンケーキレンズ

そこそこの明るさで非常に使い勝手がいいです。SONY ウルトラワイドコンバーター VCL-ECU1を装着できますよ。広角なのでボケを期待されている方には、いまいちかもしれません。

17.09.2013

浅**平

小型軽量いいです。

軽く使いやすいので、散歩のお供にしています。

2.04.2020

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