How bad can a CPL screw up your IQ

Started Feb 8, 2014 | Discussions thread
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Ron Evers
Senior MemberPosts: 1,382Gear list
How bad can a CPL screw up your IQ
Feb 8, 2014

I was out one day & came across a derelict  barn to shoot.  There were nice puffy clouds in a blue sky so I thought I would use a CPL to enhance the sky.  What is wrong here, I cannot get a sharp focus on the barn??  After puzzling for a bit I removed the filter & then perfect focus.  I put away the Marumi P.L. & forgot about it until today & decided to see if I could duplicate what happened.

Left auto focus no filter - Centre auto focus with filter - Right manual focus with filter.

Click view original please.

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The wood is clear between the knots.

 Ron Evers's gear list:Ron Evers's gear list
Panasonic Lumix DMC-G1 Panasonic Lumix DMC-GF1 Olympus PEN E-PM1 Olympus OM-D E-M5 Panasonic Lumix G Vario 14-45mm F3.5-5.6 ASPH OIS +13 more
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