The author of the finest book you'll ever read on photo restoration
(including Katrin Eisman's work which is really saying something)
<http://www.amazon.com/Digital-Restoration-Start-Finish-photographs/dp/0240808142/ref=sr_1_1?ie=UTF8&s=books&qid=1246240456&sr=1-1>
Highly recommended... even if you don't do restoration work.
Here's his self-promotional blurb. All that black hair in the 1991
photo is now gray. I think he's actually Moose's cousin.
<http://ctein.com/whoami.htm>
Chuck Norcutt
John Hudson wrote:
> Who is this "Ctein" character ? Sounds like a made up persona.
>
> jh
>
>
> ----- Original Message -----
> From: "Jan Steinman" <Jan@xxxxxxxxxxxxxx>
> To: <olympus@xxxxxxxxxxxxxxxxx>
> Sent: Sunday, June 28, 2009 8:52 PM
> Subject: Re: [OM] More on DOF and focal length (by Ctein)
>
>
>> From: Chuck Norcutt <puhpxabephgg@xxxxxxxxxxxxxxxx>
>>
>> Very timely. Jan and Mike should find this interesting. Here's
>> more on
>> DOF and focal length (by Ctein) from The Online Photographer:
>> <http://theonlinephotographer.typepad.com/the_online_photographer/2009/06/depth-of-field-hellthe-sequel.html
>
> I'm still willing to be convinced, but not by this article.
>
> Ctein writes: "I moved the camera to keep the on-film magnification
> [the same]..."
>
> He cheated. He clearly changed his position, and thus, the
> perspective. Sure, that changes DOF! But it would have changed it no
> matter the focal length.
>
> I will be convinced if he stands *at the same point* and shoots with
> the 25mm and 300mm lenses and a crop of the former to match target
> sizes shows DOF different than the latter. But I've actually done that
> to satisfy my own curiosity, and the DOF was identical.
>
> SUMMARY: if you move back and forth, it isn't the focal length that's
> changing DOF, it's the perspective.
>
> I'm still willing to be convinced, but you'll have to come up with
> something better than Ctein's article. :-)
>
> :::: There is no hope for any of us outside of a community. — Mike
> Ruppert ::::
> :::: Jan Steinman, EcoReality http://www.EcoReality.org ::::
>
>
>
--
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