[Leica] Question about angle of view of half-frame cameras

[nicholsj at edge.net (Jim Nichols)]

Didier,

According to my quick math, comparing the diagonal of the two formats, the
30mm lens would give the same included angle of a 45mm lens on the full
frame image.  A 35mm lens would approximate a normal 50mm on a full frame
image.  

As a matter of  fact, I have an old Mercury single frame camera with a
rotary shutter, and it has a 35mm lens.

Jim Nichols


> [Original Message]
> From: Didier Ludwig <rangefinder@screengang.com>
> To: Leica Users Group <lug@leica-users.org>
> Date: 10/9/2004 8:09:23 PM
> Subject: [Leica] Question about angle of view of half-frame cameras
>
> I would be interested in a Canon Demi S with 1.7/30mm lens as a small 
> snapshot half frame camera, for the days I dont want to carry a M6 along; 
> and for my kids who get more and more interested in my hobby.
>
> Am I right that the focal lenth of a half frame 18x24 camera means
another 
> angle of view than the same focal length in a full frame 36x24??
>
> So the 30mm lens of a half frame camera would not capture the same frame
as 
> a 30mm lens on a regular 35mm Camera - would it now correspond to a 60mm 
> full frame shot or to a cropped 30mm full frame shot?
>
> I'm a bit confused about this - sorry if it is a stupid beginners
question! 
> Every advice is appreciated.
> Thanks!
> Didier
>
>
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