Archived posting to the Leica Users Group, 2007/04/11

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Subject: [Leica] 21 % 24 Lenses
From: luisripoll at telefonica.net (Luis Ripoll)
Date: Wed Apr 11 14:20:44 2007
References: <200704102256.l3AMsA4Z032498@server1.waverley.reid.org> <461C631F.7070004@verizon.net>

Stan,

In my opinion your theory is not exactly, the diagonal of 24 x 36 is
something more than 45 mm, and for this reason a lens around 50 mm is
considered as "normal", if the diagonal of the M8 sensor is 32mm, IMO this
minds that the normal lens would be one in between 35 mm and 28 mm, this is
a different concept of your theory. A different thing is the angle of view
of a lens, a 50mm on 24x36 mind's that at a distance of 5 meters you catch
an horizontal field pof 3,5 meters, with a 90 mm you rich the same
horizontal field at 9 meters, with a 135 , at 13,5m and with a 35mm at 3,5
m.

Saludos cordiales
Luis   

-----Mensaje original-----
De: lug-bounces+luisripoll=telefonica.net@leica-users.org
[mailto:lug-bounces+luisripoll=telefonica.net@leica-users.org] En nombre de
Stan Yoder
Enviado el: mi?rcoles, 11 de abril de 2007 6:25
Para: lug@leica-users.org
Asunto: Re: [Leica] 21 % 24 Lenses

I did the math on the diagonal of the 18x27mm sensor of the M8. Turns out to
be 32mm near enough, which is what the 24 becomes on an M8. So the 24 is the
theoretical "normal" for the M8. However, the 50mm 'normal' lens on 35mm
film cameras would be better matched by a 28mm on the M8 (=37mm.)

Actually, the 28 framelines of the M8 VF include slightly more than the 50
lines of my M2's VF.

And, since a 35mm lens is/was the functional 'normal' with film for many of
us, a 21mm lens would be the near-equivalent on an M8.

Or am I all wet?

Stan Yoder
Pittsburgh

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Replies: Reply from hoppyman at bigpond.net.au (G Hopkinson) ([Leica] 21 % 24 Lenses)
In reply to: Message from s.yoder at verizon.net (Stan Yoder) ([Leica] 21 % 24 Lenses)