Questions tagged “lens testing”

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

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182

Why would a fisheye lens test sharper at the edges than in the center?

sonyfisheyelens-testingsharpnessmtf

Photography Stack Exchange contributor

4y ago

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156

Why are my teleconverter test shots soft, and how should I test lens sharpness properly?

tripodlens-testingsharpnessteleconvertermanual-focus

Photography Stack Exchange contributor

6y ago

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205

Why do DxOMark corner-sharpness results differ between Canon- and Nikon-mount versions of the Sigma 24mm f/1.4 Art?

sigmalens-testingwide-anglesharpnesscanon-vs-nikon

Photography Stack Exchange contributor

8y ago

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411

How can I properly test whether a lens is decentered, and do these corner crops indicate a problem?

samyanglens-testingwide-angledecenteringsharpness

Photography Stack Exchange contributor

8y ago

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327

How can I test a camera or lens at infinity focus in a small room?

lens-testingopticsfocusinfinity-focusimage-quality

Photography Stack Exchange contributor

8y ago

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170

How can I test sharpness across the full field of a 180° fisheye lens?

fisheyevignettinglens-testingsharpnessmtf

Photography Stack Exchange contributor

8y ago

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2

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92

Do these FoCal results suggest a Canon 70-200mm f/2.8L IS II has an astigmatism or alignment problem?

autofocuscanonlens-testingtelephoto-lenseslens-repair

Photography Stack Exchange contributor

9y ago

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2

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148

How can I tell if my Pentax DA 18-135 is defective or just soft at some settings?

lens-sharpnesslens-testingfocuszoom-lenspentax

Photography Stack Exchange contributor

10y ago

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198

How can I determine the actual f-number of an unmarked aperture stop on a manual lens?

aperturelens-testingmanual-focus-lensescanon-fdexposure

Photography Stack Exchange contributor

10y ago

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2

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164

Why can the same lens score much lower on a newer camera body in DxOMark tests?

micro-four-thirdsdxomarklens-testingsharpnesscamera-comparison

Photography Stack Exchange contributor

11y ago

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2

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237

Why can the same lens show different vignetting on different camera sensors?

sony-a-mountsensorvignettinglens-testingwide-angle

Photography Stack Exchange contributor

11y ago

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2

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192

How can I tell if a new lens is a genuinely bad copy?

warrantylenseslens-testingsharpnessimage-quality

Photography Stack Exchange contributor

11y ago

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2

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213

How can I create consistent sample photos to compare cameras or lenses?

distortionlens-testingtechniquecamera-comparisonimage-quality

Photography Stack Exchange contributor

12y ago

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142

How can I measure lens vignetting without special equipment?

vignettinglens-testingopticsdiymeasurement

Photography Stack Exchange contributor

12y ago

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199

How can I properly compare two lenses at home?

lens-comparison50mmlens-testingsharpnessimage-quality

Photography Stack Exchange contributor

13y ago

0

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2

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164

How can I check whether my lens was damaged after bumping it into a window?

canonpoint-and-shootlens-testinglens-damageimage-quality

Photography Stack Exchange contributor

13y ago

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2

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365

Why do MTF charts use 10 lp/mm for contrast and 30 lp/mm for resolution?

lensesresolutionlens-testingcontrastmtf

Photography Stack Exchange contributor

13y ago

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2

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283

How do MTF50 measurements compare with a manufacturer's MTF chart?

canonlens-testingsharpnessmtfimage-quality

Photography Stack Exchange contributor

13y ago

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141

What does lens centering quality mean?

lenseslens-testingopticssharpness

Photography Stack Exchange contributor

14y ago

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170

Can DxOMark lens scores be compared across camera systems?

lensesbuying-advicecamera-systemsdxomarklens-testing

Photography Stack Exchange contributor

14y ago

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