Questions tagged “lens distortion”

Ask the Unique Photo creator community — gear, technique, post-processing and more.

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384

What projection does the Sigma 8mm f/3.5 EX DG circular fisheye use?

sigmalens-distortioncanopy-photographyfisheyeprojection

Kate

7mo ago

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2

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295

Why does a fisheye lens keep a rainbow circular instead of distorting it?

lens-distortionrainbowfisheyewide-angleoptics

summerrain

1y ago

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184

Why can a wide-angle camera show pincushion distortion in air but barrel distortion underwater?

lens-distortioncalibrationaction-cameraunderwaterwide-angle

Owen

2y ago

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272

Is there a free alternative to Photoshop’s Adaptive Wide Angle for lens distortion correction?

lens-distortiondarktablegimpphotoshop-alternativesdigikam

Photography Stack Exchange contributor

2y ago

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238

Why can an 11mm fisheye and a 16mm fisheye look similar in field of view?

lens-distortionfield-of-viewfisheyewide-anglefocal-length

Photography Stack Exchange contributor

3y ago

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265

How do I convert pixels to real-world size on a flat plane at a known distance?

lens-distortioncalibrationfield-of-viewopencvmeasurement

Photography Stack Exchange contributor

3y ago

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256

Do quoted camera field-of-view specs include lens distortion?

cctvlens-distortionfield-of-viewwide-angledashcam

Photography Stack Exchange contributor

3y ago

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2

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287

Why does my 235° fisheye look squeezed when converting to equirectangular in FFmpeg?

lens-distortion360-photofisheyeequirectangularffmpeg

Photography Stack Exchange contributor

5y ago

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2

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303

Why do my RAW files show more lens distortion than the JPEG, and how should I correct it?

nikonlens-distortionlightroomjpeg-vs-rawraw

Photography Stack Exchange contributor

5y ago

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220

Do pixels correspond to a fixed real-world distance across an entire photo?

lens-distortionperspectiveopticscamera-techniquemeasurement

Photography Stack Exchange contributor

6y ago

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208

Why does my camera list a 120° angle of view when my sensor-size calculation gives much less?

lens-distortionfisheyeangle-of-viewsensor-sizefocal-length

Photography Stack Exchange contributor

9y ago

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201

How do I photograph flat artwork so the edges stay straight for print reproduction?

lens-distortiontripodartwork-reproductioncompositioncopy-work

Photography Stack Exchange contributor

9y ago

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413

What is the opposite of a fisheye lens, and are there lenses designed for pincushion distortion?

lens-distortionrectilinearfisheyewide-angleoptics

Photography Stack Exchange contributor

9y ago

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171

Does zooming in differ from cropping later, especially for portrait distortion?

lens-distortionperspectivecroppingportrait-photographyfocal-length

Photography Stack Exchange contributor

9y ago

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290

Does lens distortion change with focus distance?

lens-distortioncalibrationphotogrammetryopticsfocus

Photography Stack Exchange contributor

9y ago

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2

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253

How can I reduce sharp bends and distortion when stitching a panorama from only a few photos?

lens-distortionstitchingwide-anglehuginpanorama

Photography Stack Exchange contributor

9y ago

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131

Will a flat subject photographed straight-on have the same scale at the center and edges?

lens-distortionperspectivegeometrysmartphone-photography

Photography Stack Exchange contributor

9y ago

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2

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368

How can I estimate real-world measurement precision from a camera's resolution?

lens-distortionphotogrammetryresolutionsensor-sizemeasurement

Photography Stack Exchange contributor

10y ago

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201

How is a lens distortion model applied to undistort an image?

lens-distortionundistortioncalibrationopticsimage-processing

Photography Stack Exchange contributor

10y ago

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906

Why do smartphone wide-angle photos make objects near the edges look stretched, and why isn’t that automatically “fixed”?

lens-distortionperspectivewide-angleopticssmartphone-photography

Photography Stack Exchange contributor

11y ago

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