Continuation: Sensor Size, Present & Possibilities

Started Apr 10, 2013 | Discussions thread
joejack951
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Re: On DOF
In reply to Erik Magnuson, Apr 10, 2013

Erik Magnuson wrote:

neil holmes wrote:

Put it this way, on my Q that 85 is gives a 480mm angle of view....with 1.2 shutter speed and while the Q might not be a great camera at iso 6400 it does not have to be.   For MORE money, I could buy a lens that would give me aprox 480mm on FF but I would be at 5.6 at best.

Still not thinking it through.   You can use the same "factor" for both aperture and shutter speed, so you'd be trying to match a 480mm f/5.6 lens.  The Canon 400mm f/5.6 is $1400 while the 85 f/1.2 is $2200.

And the Canon 400mm f/5.6 will AF quite nicely on a Canon FF DSLR (assumption never having used one but I've never read anything to the contrary) unlike a Canon 85mm f/1.2 on a Pentax Q which will be strictly manual focus. Can the Q even adjust the aperture on the Canon lens?

Furthermore, the output from the 400mm f/5.6 is certainly going to look better next to the extreme center crop the Q uses from the 85mm f/1.2 (which as far as I know is not a lens renowned for its sharpness wide open).

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