Archived posting to the Leica Users Group, 2010/02/11

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Subject: [Leica] IMG: My lens-test window
From: photo at frozenlight.eu (Nathan Wajsman)
Date: Fri, 12 Feb 2010 07:00:01 +0100
References: <4B7482CB.60300@gmx.de>

Hi Douglas,

You need some colour to check for chromatic aberration, ?no? :-)

Otherwise, quite good. I am sure it helps that the cars are not moving very 
fast :-)

Cheers,
Nathan

Nathan Wajsman
Alicante, Spain
http://www.frozenlight.eu
http://www.greatpix.eu
http://www.nathanfoto.com

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On Feb 11, 2010, at 11:20 PM, Douglas Sharp wrote:

> Who needs lens-test cards? :-)
> 
> A shot through my office window today:
> 
> http://gallery.leica-users.org/d/203014-1/_MG_0702.jpg
> 
> Car number plate on the left = edge sharpness
> A brick wall in the background = centre sharpness, contrast
> Twigs and branches = chromatic aberration, fringing, sharpness and contrast
> Snow = white balance
> Shield on lamp-post = right-edge sharpness
> Cyclist?s face = flesh tones
> The whole shot = depth of focus (I focused on the plate of the VW Golf in 
> the middle)
> 
> I think this Soligor 35-80 zoom might be a keeper, it seems to work well 
> enough at f5.6 and 80 mm, light and compact too :-)
> 
> A similar test with a Tokina 35-105 proved that the lens barks :-(
> 
> Technical data: shot with a Canon 20D, 1/320, ISO equivalent 800 through a 
> slightly grubby windowpane
> 
> All I need now is some sun to try it out again in decent weather at ISO 
> 100.
> BTW: winter,snow and dull weather have now been with us here in Hannover 
> since the 18th of December - and I'm gradually getting sick of it.
> 
> Cheers
> Douglas
> 
> _______________________________________________
> Leica Users Group.
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In reply to: Message from douglas.sharp at gmx.de (Douglas Sharp) ([Leica] IMG: My lens-test window)