OK ALL YOU full frame camera fanatics

Started Nov 14, 2012 | Discussions thread
Great Bustard Forum Pro • Posts: 39,705
Re: Answer for your "understanding"

Jim Ford wrote:

Great Bustard wrote:

But if you shot f/1.4 on one format, and then shot f/1.4 on another format, I can tell you that the resulting photo was rather different, and not only in terms of DOF (although DOF may have been the most noticable of the differences).

The above is curious!

I can't see what you can mean by the above. Apart from the obvious differing FOV of the resultant images, there would be no difference, certainly with regards to DOF. Otherwise how would the lens 'know' what format the image was going to be projected on, in advance of the light rays hitting the medium to register the image? You could tape a piece of 35mm film across (say) a full plate, and expose the composite. The only difference between the 35mm and full plate sections would be the FOV. How would the DOF or anything else be different between the two formats?

Jim

I apologize for the confusion -- I should have been more clear.  What I should have said was:

For a given perspective, framing, and shutter speed, if you shot f/1.4 on one format, and then shot f/1.4 on another format, I can tell you that the resulting photo was rather different, and not only in terms of DOF (although DOF may have been the most noticable of the differences).

I'm thinking that if you're comparing two formats, perspective and framing are two visual properties that you would hold constant between them, unless, of course, one system could achieve a perspective/framing that the other system could not, and that resulted in a "better" photo.

However, more to the point was the question I posed you:  in terms of the visual properties of the final photo, what does 50mm f/2 on 4/3 do for you that 100mm f/4 on FF does not?

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