Focal length 35mm equivalent, but not F-stop?

Started Jul 24, 2014 | Discussions thread
Beachcomber Joe
Beachcomber Joe Senior Member • Posts: 1,256
Re: Focal length 35mm equivalent, but not F-stop?

Just another Canon shooter wrote:

Beachcomber Joe wrote:

Simpler?

I photograph a subject with my FF digital camera. The brightness I want in the photograph requires an exposure of 1/125 sec, F/11 at ISO 100. If I grab my old Crown Graphic, load it with ISO 100 film and shoot at 1/125 sec, f/11 the resulting photograph will have the same brightness level as the FF image. Taking a MFT camera, exposing at 1/125 sec., f/11 at ISO 100 again the resulting photograph will have the same brightness as the FF digital and medium format film cameras.

And of course, they all look the same?

As i said, they will all have the same brightness level.  Even within a format and sensor type different brands will look differently because of resolution, color rendition and noise among other things.  Between formats depth of field and other characteristics will also change.  Trying to massage numbers to render all the variables the same is a fool's errand.

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Canon EOS 6D
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