"Equivalence" demonstrated: Canon 5D and Panasonic GX1

Started Apr 27, 2013 | Discussions thread
pavinder
Regular MemberPosts: 213
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Re: "Equivalence" is not "Equivalence" - try a new terminology.
In reply to Great Bustard, Apr 29, 2013

Great Bustard wrote:

I asked earlier today:

http://www.dpreview.com/forums/post/51372996

In terms of the visual properties of the final photo, what parameters do you think are "more equivalent" than the parameters I have used [photos with the same perspective, framing, DOF, shutter speed, and display size]?

From where I sit, I find it ironic that so many would be happy to define "Equivalent" as photos with the same AOV and exposure, despite the fact that they would have rather different visual properties.

What do you think?

Of the parameters you used, I'd class perspective, framing and DOF as visual properties.  But shutter speed and display size are technical properties.

Personally I think one needs to choose between

a) visual properties (DOF, framing, bokeh, etc), and

b) technical properties (noise, camera settings, quantum stuff).

Of the parameters you used, I'd class perspective, framing and DOF as visual properties.  But shutter speed and display size are technical properties.

Shutter speed is a technical point.  As are focal length, aperture, ISO and all other camera settings.

One can look at two photos, compare them aesthetically and declare them "visually equivalent" without ever needing to know the shutter speed, aperture or focal length etc., yet alone amount of captured light and so on.

It makes little sense to me to arbitrarily define some visual properties as important and relegate others as not important to the discussion.

But if the discussion is kept to aesthetic vs technical then it becomes much easier.

I also completely agree that it's baffling how people could class photos with the same AOV and exposure as "equivalent" even if they look completely different.

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