Crop Factors

Started Sep 20, 2008 | Discussions thread
hbx2004
Veteran MemberPosts: 3,162
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Re: No such thing...
In reply to Sean Nelson, Sep 21, 2008

Hi Sean,

Sean Nelson wrote:

hbx2004 wrote:

The point is:
AP-S cameras do crop (by factor), thus we can apply "focal length
multiplier".
P&S cameras don't crop -we use focal length (35mm) equivalence for
easier understanding only.

What about a 4/3 camera? It has a sensor which is about half the
diagonal of a full 35mm frame. It's interchangeable lenses are
designed specifically to cover the smaller sensor size. Does it
crop?

To avoid cropping (and size/weight/cost, of course), new 4/3 lenses were designed for 4/3 sensor -so why should they deliver cropped result? Cropped, compared to what?

But, we use to say, that 4/3 lens has 35mm equivalence factor 2.0 -so we know, for example, 14mm on 4/3 has the same view angle as 28mm lens on 35mm camera.

AFAIK, "crop factor" term can only be used for APS-C cameras -because they can use FF lenses (on smaller than FF sensor).

This leads me to another question... New Panasonic G1 is micro4/3, where normal 4/3 lenses can be used via adapter. What are the consequences? Nobody mentioned any...

I'll take a look in Panny forum..

Greetings,
Bogdan
--
My pictures are my memories
http://freeweb.siol.net/hrastni3/

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