18-55 vs 16-45?

[Paul]

Thanks Brian.

Regards,
Paul


On 15/01/2007, at 8:41 PM, Brian Dunn wrote:

>
> My particular 16-45 is quite a bit sharper than the 18-55 at 28mm,  
> and they
> are comparable in sharpness at 50mm.  The 16-45 has noticably  
> better contrast
> at either focal length.
>
> The 16-45 also has comparable sharpness and better contrast than an  
> M 28 f2.8
> prime which I have here.
>
> The 16-45 seems to have comparable contrast and not as much  
> resolution as my A
> 50 f1.7 prime.
>
> I tested these by making paper print outs with a row of digits in  
> 72 point
> font, followed by another row in 48 point, 36 ... and all the way  
> down to 6
> point.  These are placed across the room and photographed with the  
> camera at
> 180th and aperture 5.6, on a tripod with self timer mirror release,  
> plus
> flash.  Several shots are taken with manual focus to be sure that  
> the focus
> is correct.  I also made it a point to zoom in, focus, then zoom  
> out to the
> final focal length before tripping the shutter.  You can look at  
> each line of
> numbers and see where they get unreadable.
>
>
> Brian
>
>
> -- 
>
> Brian Dunn Photographic
> http://www.bdphotographic.com
>
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