From: dj_nme on
Robert Spanjaard wrote:
> On Sat, 15 May 2010 17:08:28 +1000, dj_nme wrote:
>
>>> What I don't understand is why the Sony 16/2.8 is so big considering
>>> the small front element???
>>> http://a.img-dpreview.com/previews/SonyNEX5/Images/NEX-5_with_16mm.jpg
>>>
>>>
>> It's probably more of an aesthetic choice by the designer to "blend" the
>> lens tube into the mount; it would probably look a little odd to see a
>> "stepped-in" or (perhaps) a conical shaped lens tube.
>
> Probably true. And it _is_ stepped down a bit. Check the filter thread/
> hood mount.
>
>

Not really stepped down, as it allows the lens hood to be the same
diameter as the lens barrel and so that it still looks like a continuous
tube, even with the hood attached.
The only wider bit is the knurling on the focus ring .