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S
Lens ComparisonsStefano Prezioso
Lens Image Characteristics
Resolution (Sharpness)
Distortion
Vignette (Light Falloff)
Chromatic Aberration
Resolution
How “sharp” the lens is Contrast Resolving Power of
Detail
Measured and Quantified in MTF Charts
Lenses “Out Resolve” the Sensor
Distortion
Three types Pincushion Barrel Mustache
Most noticeable at edges/corners
Usually Correctable
Vignette
Amount of Light Fall Off in Lens
Increases as Distance from Center Increases
Measured in Exposure Value (EV) Stops
Correctable in Post Processing
Chromatic Aberration
Different Colors Converge at Different Points
Good Lenses are Corrected
Correctable in Post-Processing
Nikon Brand Lens Candidates
Nikkor AF-S 14-24 f/2.8 G ED
Nikkor AF 14mm f/2.8 D ED
Nikkor AF-S DX 10-24mm f/3.5-4.5G ED
Nikkor AF-S 12-24mm f/4G IF-ED DX
Sigma Brand Lens Candidates
Sigma EX 10-20mm f/3.5 EX DC HSM
Sigma AF 10-20mm f/4-5.6 DC EX HSM
Sigma AF 12-24mm f/4.5-5.6 EX HSM DG
Tamron/Tokina/Samyung Lens Candidates
Tamron SP AF 10-24mm F/3.5-4.5 Di II LD Aspherical IF
Tokina AF 12-24mm f/4 AT-X Pro DX
Samyang 14 mm f/2.8 IF ED MC Aspherical
Pricing Overview
Nikkor AF-S 14-24 f/2.8 G ED $1549
Nikkor AF 14mm f/2.8 D ED $1390
Nikkor AF-S DX 10-24mm f/3.5-4.5G ED $780
Nikkor AF-S 12-24mm f/4G IF-ED DX $900
Sigma EX 10-20mm f/3.5 EX DC HSM $649
Sigma AF 10-20mm f/4-5.6 DC EX HSM $479
Sigma AF 12-24mm f/4.5-5.6 EX HSM DG $859
Tamron SP AF 10-24mm F/3.5-4.5 Di II LD Aspherical IF
$474
Tokina AF 12-24mm f/4 AT-X Pro DX $499
Samyang 14 mm f/2.8 IF ED MC Aspherical $426
Resolution at f/8 14mm
Lens Center f/8
Edge f/8
Extreme f/8
Nikkor AF-S 14-24 f/2.8 G ED @ f/4 2212.5 2143.5 2051.5
Nikkor AF 14mm f/2.8 D ED 2176 1981 1750.5
Nikkor AF-S DX 10-24mm f/3.5-4.5G ED 2099 2038 1863
Nikkor AF-S 12-24mm f/4G IF-ED DX @ 18mm
2113 1898.5 1839.5
Sigma EX 10-20mm f/3.5 EX DC HSM @ 15mm
2144 2020 1861
Sigma AF 10-20mm f/4-5.6 DC EX HSM @ f/5.6
2181 1993 1780
Sigma AF 12-24mm f/4.5-5.6 EX HSM DG @ 17mm
2037 2000.5 No Data
Tamron SP AF 10-24mm F/3.5-4.5 Di II LD Aspherical IF
2100 1884 1479
Tokina AF 12-24mm f/4 AT-X Pro DX @ f/5.6 18mm
2104.5 1890.5 1756
Samyang 14 mm f/2.8 IF ED MC Aspherical Awesome
Superb Great
Bad Resolution Results
Nikkor AF 14mm f/2.8 D ED
Nikkor AF-S 12-24mm f/4G IF-ED DX
Sigma AF 10-20mm f/4-5.6 DC EX HSM
Tamron SP AF 10-24mm F/3.5-4.5 Di II LD Aspherical IF
Tokina AF 12-24mm f/4 AT-X Pro DX
Distortion Results
Nikkor AF-S DX 10-24mm f/3.5-4.5G ED
Very Good from 14mm-18mm
Nikkor AF-S 14-24 f/2.8 G ED 14mm: Very Slight 18mm+: Exceptional
Sigma EX 10-20mm f/3.5 EX DC HSM
15mm: Almost Perfect
Sigma AF 12-24mm f/4.5-5.6 EX HSM DG
Very Good throughout
Samyang 14 mm f/2.8 IF ED MC Aspherical
Absolutely Awful
Chromatic Aberration Results
Nikkor AF-S DX 10-24mm f/3.5-4.5G ED
Moderate
Nikkor AF-S 14-24 f/2.8 G ED Good
Sigma EX 10-20mm f/3.5 EX DC HSM
Moderate
Sigma AF 12-24mm f/4.5-5.6 EX HSM DG
Terrible
Samyang 14 mm f/2.8 IF ED MC Aspherical
Stunning
Vignetting Results
Nikkor AF-S DX 10-24mm f/3.5-4.5G ED
0.51 EV
Nikkor AF-S 14-24 f/2.8 G ED 0.2 EV
Sigma EX 10-20mm f/3.5 EX DC HSM
0.45 EV
Samyang 14 mm f/2.8 IF ED MC Aspherical
1.36 EV
DxO Optics Pro 6
Automatically corrects… everything.
Calibrated to specific camera and lens set up
Compatible with only certain lens/camera combinations
$169 for standard edition. EDU discount?
Final Picks
Sigma 10mm-20mm f/3.5 Distortion free from 14mm-20mm Sharp Decent CA and Vignetting Characteristics
Samyang 14mm f/2.8 Super Sharp Perfect CA Characteristics Bad Distortion and Vignetting
Surprise Lens
Sigma 14mm f/3.5 Older Lens (Replaced by f/2.8 version) No Profiles for Corrections (To my knowledge) Sharp, Good Distortion Characteristics Long Term Loan… Free