3 Bonus tips from the PP team...

Tim, Dan and Louise rec­om­mend their favourite hid­den cam­era func­tions for you to try out.

Practical Photography (UK) - - Hidden Camera Features -

Ev­ery lens on the mar­ket is op­ti­cally im­per­fect in one way or an­other, which can have a sig­nif­i­cant im­pact on your im­ages. Un­for­tu­nately, you can’t do much about a lack of sharp­ness, but you can ac­cu­rately cor­rect a host of other is­sues, and you can do it in-cam­era. We check out three of the most com­mon prob­lems – vi­gnetting, lens dis­tor­tion and chro­matic aber­ra­tion – to the right. Your cam­era cor­rects these us­ing lens pro­files, which hold info on ex­actly how each lens model per­forms at ev­ery fo­cal length and aper­ture set­ting, and com­pen­sates for this with im­pres­sive pre­ci­sion. Lens cor­rec­tions are only ap­plied to JPEGs – RAWs need cor­rect­ing in edit­ing soft­ware.

WITH LENS COR­REC­TION

The cor­ners of the frame ap­pear darker than the cen­tre, a de­fect es­pe­cially com­mon at wider aper­ture set­tings. LENS DIS­TOR­TION VI­GNETTING Straight lines near the edges of the frame ap­pear to bow ei­ther in­wards or out­wards, de­pend­ing on the lens.

TIP 1 TIM BERRY FIX DIS­TOR­TIONS WITH LENS COR­REC­TION

CHRO­MATIC ABER­RA­TION Ar­eas of con­trast are of­ten fringed with pur­ple and green lines. This tends to be more com­mon on cheaper glass.

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