Hacker News Reader

All of the others seem "zoomed in". I've heard someone say it's because the others use digital stabilization, which means they have to crop the middle of the image to stabilize it against the edges, or something like that. Is that true? Because then OIS seems to significantly improve image quality in video recording as well.

View on HN

It makes sense 920 has 26mm focal length, S3 16mm, iPhone 5 33mm (equivalents). Smaller focal length - wider field of view so it makes sense that iPhone feels zoomed in. I can't see the difference for S3, though. Magic?

But even the iPhone 5 looks more zoomed in then Lumia 920, though. Look at the initial filming, when he films the other people filming him. They are bigger on the iPhone. The quality is poorer as well.

read the message above you. The lenses have different focal length. 920 gives you broader field of view so you can get wider picture and more light. iPhone doesn't. That's why iPhone looks zoomed in.

To me it looks like the "others" have far lower bitrate than the Nokia. It'd be interesting to see the originals.

OIS has the added advantage that it makes the video encoder's job easier, since there's less motion to compensate for. A stabilized video will show fewer artifacts when encoded at the same bit rate.

Reply on news.ycombinator.com