Wide Angle Lens and Landscape Photography (hyperfocal distance focusing)

[Mark Elberson]

I own the Canon EF-S 10-22mm f/3.5-4.5 and I love it. The view @
10mm is phenomenal! On your 50D set the aperture to f/8 and the
Hyperfocaldistance will be 2.19ft. If you focus on anything
reasonably close to you and then recompose almost everything in the
frame will be sharp. Heck, even at f/3.5 the Hyperfocaldistance will
be just over 5 ft! The FoV and DoF are HUGE with this lens.


All of these calculations were done using DOFMaster with a Circleofconfusion of
0.019 mm. I am not sure if that Circleofconfusion is optimized for the 50D but it should be a good starting point.

[Alan]

If you focus on anything
reasonably close to you and then recompose almost everything in the
frame will be sharp.
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Perhaps, but not likely. While the 10-22 lens is very good, it's a lot to expect from this lens, that everything will, indeed, be in sharp focus (out to infinity). It's a big demand on this lens' optics. Don't be surprised to find out that the background is not as sharp as you thought it would be.

[Mark Elberson]

Perhaps, but not likely. While the 10-22 lens is very good, it's a lot to expect from this lens, that everything will, indeed, be in sharp focus (out to infinity). It's a big demand on this lens' optics. Don't be surprised to find out that the background is not as sharp as you thought it would be.

So are you arguing that this lens is not that sharp? That's not reallyrelevantwhen discussing hyperfocaldistance.

[Alan]

So are you arguing that this lens is not that sharp? That's not reallyrelevantwhen discussing hyperfocaldistance.
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You're right, it's not relevant.