Thursday, 28 June 2012

Pentax's New K-30 DSLR: First Impressions and Sample Images

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June 28, 2012
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Real world shots taken with Pentax's new mid-level DSLR
Pentax's new K-30 is one of the most interesting midl-level DSLRs around. We got a chance for some hands-on time with one of the very first production models off the line. Our full lab test will be coming soon, but for now, here's a selection of real-world sample images.

Pro photographer Michael Brian depicts the bond between humans and their dog counterparts
The International Space Station has quite an assortment of camera gear
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TECH SUPPORT
Depth Bomb
Q. My Fujifilm FinePix S4500 has some amazing capabilities, but when I set it to program mode and tried to dial in more aperture options, I found I could only get one or two. (I could get f/11 with some contortions.) According to the fine print in the manual, the aperture is controlled to some degree by neutral-density filters, not by actually changing the lens opening. Doesn’t this limit our ability to control depth of field?

A. It certainly does. But what it really limits is the ability to set shallow depth of field. The small sensors in compact cameras provide vast, often too vast, DOF. The maximum f/3.1 aperture of your S4500 is the full-frame equivalent of f/18 in terms of DOF at any given subject magnification; f/5.6 will give you the DOF of about f/32. Apertures in cameras of this type are so small that a true f/11 would essentially be a pinhole, and the resulting diffraction would seriously degrade images.



 
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