Verdict: 4.5 stars Perspective Efex is a really nice addition to the DxO Nik Collection 3. It offers geometric perspective, distortion and tilt-shift corrections in a simple, user-friendly interface.
Lens corrections – digital
No lens is perfect. All lenses display aberrations to some degree, including distortion, chromatic aberration (colour fringing) and vignetting (corner shading). These are worse with cheap kit lenses or zooms, and eliminating them optically is both difficult and expensive.
So it's often more effective to put up with these slight optical imperfections in the original lens design and fix them digitally instead.
An increasing number of programs now offer automatic lens corrections which can identify the lens used to take a shot and apply a specially-calibrated correction profile from that lens. The better the software, the better the corrections and the more lenses are supported.
DxO Optics Pro was the first in this field (now DxO PhotoLab), though Lightroom's lens corrections are really good too and Capture One Pro has profiles for a large number of consumer and professional lenses. These are probably the top three simply because they are RAW conversion tools you'd use at the start of your image-editing workflow anyway, but there are plenty of other programs which will fix your lens defects for you too.
Aberrations, or optical imperfections, exist because no lens is optically perfect. Almost all lenses show aberrations from the ‘perfect’ image.
There are a handful of basic tweaks you just know you’re going to want to apply to each image.
Verdict: 4 stars DxO ViewPoint 3 is a very effective and useful add-on for DxO PhotoLab but perhaps less useful these days as a plug-in for Lightroom and Photoshop, given that these have pretty good perspective correction tools of their own. ViewPoint also faces competition from the new and very similar Perspective Efex plug in that’s part of the DxO Nik Collection 3.
Keystone correction is usually used to fix converging verticals in architectural shots – that’s the most obvious use for the Capture One keystone correction tools – but this vertical keystone correction isn’t the only kind you’ll need. Keystone distortion happens when you tilt the camera relative to your subject, and this can mean horizontal tilt […]