Wide angle, leaning towards Tamron 10-24mm

RioRico · 12-28-2011, 11:19 PM

Originally posted by ramseybuckeye

One thing I've had a little trouble with is focusing from 10-13mm on my K20D. It doesn't like to focus unless it is focusing close, manually or AF. Any clue as to why?

One problem with AF on the wide end is that the subject field may be too target-rich, but I haven't really been bothered with this on my K20D, neither indoors nor outside. The cure is to select the center or other AF point, which also determines Focus Confirmation when manual focusing. I generally focus manually only for hyperfocus -- see this Online Depth of Field Calculator. So at the wide end I'll set the aperture to f/5.6, prefocus to around 40cm / 16in, and have DOF from 20cm / 8in to infinity.

jeverettfine · 12-29-2011, 08:35 AM

Check out the photos on the Tamron 10-24 Club thread. There are some very nice images on the first page and some of the later ones that show how to use the forground etc.

12-29-2011, 08:35 AM	#17
jeverettfine Veteran Member Join Date: Aug 2011 Location: Austin, Texas Photos: Albums Posts: 328	Tamron 10-24 Check out the photos on the Tamron 10-24 Club thread. There are some very nice images on the first page and some of the later ones that show how to use the forground etc.

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12-28-2011, 11:19 PM	#16
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	Originally posted by ramseybuckeye One thing I've had a little trouble with is focusing from 10-13mm on my K20D. It doesn't like to focus unless it is focusing close, manually or AF. Any clue as to why? One problem with AF on the wide end is that the subject field may be too target-rich, but I haven't really been bothered with this on my K20D, neither indoors nor outside. The cure is to select the center or other AF point, which also determines Focus Confirmation when manual focusing. I generally focus manually only for hyperfocus -- see this Online Depth of Field Calculator. So at the wide end I'll set the aperture to f/5.6, prefocus to around 40cm / 16in, and have DOF from 20cm / 8in to infinity.