Archived posting to the Leica Users Group, 2007/01/11

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Subject: [Leica] Re: pixel density
From: henningw at archiphoto.com (Henning Wulff)
Date: Thu Jan 11 12:25:47 2007
References: <200701111333.l0BDUUW5029716@server1.waverley.reid.org> <724FDD310638E147AD8E509D15FFB73183F47F@exchange.microassist.local> <3cad89990701110933ha6362dfkcd2c3db8ba8b61c@mail.gmail.com> <F0F12715-84E4-43C4-8F7F-5D7EA351C8BE@mac.com> <p0623090ec1cc2a1ed35e@[10.1.16.144]> <811AEFEA-E39C-4909-BD56-7F03EE2202EC@mac.com> <p0623090fc1cc3f8bd8fa@[10.1.16.144]> <EE587604-DC76-485F-83A5-36DE78094DD2@mac.com>

At 1:32 PM -0600 1/11/07, Lottermoser George wrote:
>Could you elaborate on this thought.
>
>Regards,
>George Lottermoser
>george@imagist.com
>
>
>
>On Jan 11, 2007, at 1:26 PM, Henning Wulff wrote:
>
>>pixel density of the 20D for telephoto stuff.

The 20D is an 8mp camera, but compared with the 5D it has a smaller 
sensor by a factor of about 2.5 (somewhat less than 1.6 squared). So 
a full size sensor such as the 5D would need about 20mp to have the 
same number of pixels per square in. (pixel density) as the 20D.

That means that if I take the 560 telyt and shot the same subject 
with the 20D and the 5D, and then crop the 5D image down to the same 
area as that of the 20D (to get the same angle of view), I'd wind up 
with 12.8/2.5 or about 5mp. So compared with what the 20D gives me in 
telephoto shots, shooting with the 5D is like shooting with a 5mp 
camera

This means that shooting with the 20D gives me a small resolution 
advantage for telephoto shots. Also it's smaller, lighter, faster, 
and I can get more shots on a card. :-)

The 5D is better for normal and wide shots, for dof control, low 
light etc, but the 20D has its place.

-- 
    *            Henning J. Wulff
   /|\      Wulff Photography & Design
  /###\   mailto:henningw@archiphoto.com
  |[ ]|     http://www.archiphoto.com

Replies: Reply from imagist3 at mac.com (Lottermoser George) ([Leica] Re: pixel density)
In reply to: Message from snasta at microassist.net (Sanjay Nasta) ([Leica] RE: LUG Digest, Vol 33, Issue 549)
Message from jayanand at gmail.com (Jayanand Govindaraj) ([Leica] RE: LUG Digest, Vol 33, Issue 549)
Message from imagist3 at mac.com (Lottermoser George) ([Leica] RE: LUG Digest, Vol 33, Issue 549)
Message from henningw at archiphoto.com (Henning Wulff) ([Leica] RE: LUG Digest, Vol 33, Issue 549)
Message from imagist3 at mac.com (Lottermoser George) ([Leica] RE: LUG Digest, Vol 33, Issue 549)
Message from henningw at archiphoto.com (Henning Wulff) ([Leica] RE: LUG Digest, Vol 33, Issue 549)
Message from imagist3 at mac.com (Lottermoser George) ([Leica] Re: pixel density)