Archived posting to the Leica Users Group, 2008/09/23

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Subject: [Leica] S2 hits Photokina
From: red735i at earthlink.net (red735i@earthlink.net)
Date: Tue Sep 23 20:04:14 2008

And to make THAT worse, the amount of "acceptable" vignetting is a 
relatively undefined value.

What you can be sure of is that leica will tell us, when they are ready....

I think it was Steve or Doug that mentioned that it is feasible that R 
lenses could work 100% with an adapter, But with a smaller useable sensor 
area.......like in 24x36mm.  I think this was a good input.

Wee will have to wait...

Frank

-----Original Message-----
>From: Tom Schofield <tomschofield@comcast.net>
>Sent: Sep 23, 2008 10:17 AM
>To: Leica Users Group <lug@leica-users.org>
>Subject: Re: [Leica] S2 hits Photokina
>
>Even within the circle you see on the paper, there are degrees of  
>brightness, which we call vignetting, that are a judgment call as to  
>what degree of vignetting you will accept as being the "image circle".
>
>Tom
>
>
>On Sep 22, 2008, at 8:33 PM, red735i@earthlink.net wrote:
>
>> Not to beat around the bushes:  Wrong.
>>
>> Yes, an lens creates a circular inmage circle.
>> The way to think about this is to place a circle on a sheet of paper.
>> Over it, place 2 small black pieces of paper... one 24x36mm the  
>> other, 36mm square.  You will see that the basic issue is the  
>> DIAGONAL of the sensor, not an edge dimension.
>>
>> try it out physically, then you will never be confused about image  
>> circle and coverage.
>>
>> Frank
>>
>>
>> Now a technical question...the image from a lens is an image circle
>>> correct? Not a rectangle, correct?  Now a 35mm piece of film is a
>>> rectangle so to make a larger sensor all one really would need to  
>>> do is
>>> to make it square, 35mm square, and you'd have a larger sensor and  
>>> still
>>> be able to use existing lenses, or am I WAY off on my thinking?
>>>
>>
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>
>
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Replies: Reply from ken at iisaka.org (Ken Iisaka) ([Leica] S2 hits Photokina)
Reply from robertmeier at usjet.net (Robert Meier) ([Leica] S2 hits Photokina)