Panasonic 7-14 F4 vs Olympus 7-14 Pro F2.8

rrr_hhh wrote:

gary payne wrote:

Hey EricK

On another thread I began about a week ago regarding CA from the Pana 7-14mm on an Oly EM1, a real pro (given his website) assured me that his Pana 7-14mm was his favorite lens and he was able to shoot without CA mostly by using his free hand to block out flare. I am not sure how that would work since at 7mm the 180 degrees range will suck in anything in front of the camera (wear your best shoes). But his gallery was very very convincing.

First time I hear that CA can be corrected by shading the lens. From what I know CA is an aberration occurring due to the lens design and becoming visible in highly contrasted edges (like branches of trees against a bright sky). Flare occurs with the sun in the frame or very near of the frame. You can shade your lens from the sun, but unless the CA was located in a flare sensitive part of the frame and the two effects were cumulated, I don't think you can improve CA by shading your lens. CA for instance also occurs at the edge of two differently focused zones (aka the foreground is sharp and the background out if focus, or vice versa) : no shading IMO can take care of that.

CA however, unlike flare or the ugly purplish blobs can usually easily be corrected in postprocessing.

Yes..Most CA can be almost eliminated with the use of your hand.. EASY STUFF.. I've done it.. no problem..