Re­duce dis­tor­tion and fring­ing

You can use Cap­ture NX-D to cor­rect com­mon lens-re­lated prob­lems in a click

NPhoto - - Niko Pedia Nikon Capture NX-D -

1 CAM­ERA AND LENS COR­REC­TIONS

Click here to sum­mon the Cam­era and Lens Cor­rec­tions panel.

2 AUTO DIS­TOR­TION CON­TROL

Tick this box. You will also need to set the drop­down menu be­low to On. Cap­ture NX-D will then read the photo’s me­ta­data to dis­cover what lens and fo­cal length were used to cap­ture the shot so that it can coun­ter­act any lens-in­duced geo­met­ric dis­tor­tion.

3 COM­PARE IMAGES

When fix­ing pho­tos, it helps to be able to com­pare the edited ver­sion with the orig­i­nal, es­pe­cially when coun­ter­act­ing geo­met­ric dis­tor­tion. To see both ver­sions of the photo, click on the Multi icon and pick Com­pare Be­fore and Af­ter Images. To re­move bar­rel dis­tor­tion, Cap­ture NX-D has to warp the im­age and this can cause a slight change in com­po­si­tion. Here we’ve lost the top edge of the frame.

4 SHOW GRID

The Im­age>Show Grid com­mand sum­mons an over­lay grid. This grid is es­pe­cially use­ful when at­tempt­ing to iden­tify geo­met­ric dis­tor­tion caused by a wide-angle lens. As the hor­i­zon­tal and ver­ti­cal lines are per­pen­dic­u­lar and straight, you can see if a build­ing’s walls are straight or curved. In our un­pro­cessed im­age the build­ing’s hor­i­zon­tal lines curve up near the middle and down to­wards the edges – that’s bar­rel dis­tor­tion. In the cor­rected ver­sion of the shot, the build­ing’s hor­i­zon­tal lines are straighter.

5 VI­GNETTE CON­TROL

The light en­ter­ing the edge of a lens isn’t as bright as the light en­ter­ing the cen­tre. This uneven ex­po­sure can cause the edges – and par­tic­u­larly the cor­ners – of the frame to be darker than the middle. To lighten up dark cor­ners, tick this box and drag the slider right. This will re­sult in a more evenly ex­posed sky in a land­scape, for ex­am­ple. Drag left to darken the cor­ners of the frame.

6 PF FLARE

This tool can be used to re­duce ring or cir­cu­lar flare pro­duced by bright lights.

7 FISH­EYE

This sec­tion will be­come ac­ces­si­ble if Cap­ture NX-D de­tects that a fish­eye lens has been used to take your shot. When coun­ter­act­ing the ex­treme dis­tor­tion pro­duced by a fish­eye lens you can choose to crop out the edges that fea­ture no data, or fill them with a cho­sen colour.

8 IM­AGE DUST OFF

This en­ables you to browse to a ‘dust off’ ref­er­ence im­age taken by your Nikon. Cap­ture NX-D can then an­a­lyse the dust in the ref­er­ence im­age and so re­duce it in a RAW photo. This saves you the has­sle of man­u­ally re­mov­ing dust us­ing the Auto Re­touch Brush.

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