Depth of Field Ain’t so Tuff

Figure 1: The DoF (Depth of Field/Focus) equation.

Depth of Field ain’t so tuff.

Recently I needed to take some photographs of the antique glassware that my spouse collects.  This is easy with a point n’ shoot, since its depth of field is pretty good thanks to the short focal length that most point ‘n shoots have in their built-in lenses.  The point ‘n shoots usually have a wide angle (anywhere from 6 to 15 mm – but sometimes variable up to higher focal lenghs with fixed zoom offsets).

Read more about my DoF

I Suppose this VOIDS the Warranty …

Figure 1:  My Pentax K5 probably isn’t under warranty now. 

So … I guess my K5 has long been out of warranty anyway.  About a year ago the mirror-box went out of calibration. Anyway – I think that’s what happened, and I thought about sending it in for a re-cal. Subsequently the LED/Live-View screen went belly up, and finally the main board.  The cost trade-offs seemed to imply that fixing the K5 was no longer an option, so I decided I may as well take it apart and see what makes it tick.  After a dozen or so tiny little screw removals …

Read More about the K5