Sony 16-50 vs. Tamron 17-50 Distortion Comparison at 16mm. vs. 17mm.

Distortion Comparison # 377/380
Distortion Comparison
Sony 16-50 vs. Tamron 17-50
at 16mm. vs. 17mm.
	Distortion Tests by Sinan Ozturk

Barrel Distortion is optical flaw of a lens which causes straight lines in the photo look slightly curved outwards. Its much more apparent in wider focal lengths and zoom lenses and gets worse in the bottom or top of the photo, rather than center. It becomes apparent when skyline is photographed so we do barrel distortion tests with a clear skyline shot.

In the first comparison, skyline in the very bottom of the photo because this is where barrel distortion is worse for any lens.

In the second shot skyline is in the very center of the image where barrel distortion's effect is the least apparent.

In the third shot, skyline is in the 1/3 or 2/3 of the photo (golden rule) where distortion is same for both.

Red line in the photos are added in post production to show where skyline would suppose to be if lens were flawless with no distortion. The closer the real skyline to the red line, the better the lens and more apart the skyline from the red line, worse distortion the lens has.

For more information about this distortion tests, please read our distortion test guidelines.

Photo_627Sony 16-50 DT F2.8 SAM

against

Photo_636 Tamron 17-50 F/2.8

F11.0

1/250

100

16mm.

F11.0

1/320

100

17mm.

Photo by Sinan Ozturk

EXIF

Photo_628Sony 16-50 DT F2.8 SAM

against

Photo_637 Tamron 17-50 F/2.8

F11.0

1/200

100

16mm.

F11.0

1/200

100

17mm.

Photo by Sinan Ozturk

EXIF

Photo_629Sony 16-50 DT F2.8 SAM

against

Photo_638 Tamron 17-50 F/2.8

F11.0

1/125

100

16mm.

F11.0

1/125

100

17mm.

Photo by Sinan Ozturk

EXIF

Barrel Distortion Comparison
You can select 2 lens to compare their barrel distortions side by side:
against

Distortion Tests

Carl Zeiss 24-70 F2.8 ZA SSM (at 24mm.)	Carl Zeiss 24-70 F2.8 ZA SSM (at 70mm.)	Carl Zeiss Jena MC Flektogan 35mm F2.4 (at 35mm.)
Carl Zeiss Jena Pancolar 50mm �F1.8 (at 50mm.)	Cosina 19-35mm F3.5-F4.5 (at 26mm.)	Cosina 19-35mm F3.5-F4.5 (at 35mm.)
Minolta 24mm F2.8 (at 28mm.)	Minolta 28-70mm. F2.8 (at 28mm.)	Minolta 28-70mm. F2.8 (at 50mm.)
Minolta 28mm. F2.8 (at 28mm.)	Minolta 35-80mm F/4-5.6 (at 35mm.)	Minolta 35-80mm F/4-5.6 (at 75mm.)
Minolta 50mm F/1.4 (at 50mm.)	Samsung 10mm f3.5 (fisheye) (at 10mm.)	Samsung 18-55mm OIS F/3.5-5.6 (at 18mm.)
Samsung 18-55mm OIS F/3.5-5.6 (at 50mm.)	Sigma 10-20mm. F/4-5.6 (at 11mm.)	Sigma 10-20mm. F/4-5.6 (at 20mm.)
Sigma 12-24 F4.5-5.6 DG (at 12mm.)	Sigma 12-24 F4.5-5.6 DG (at 24mm.)	Sigma 17-70 F/2.8-4 DS Macro HSM (at 17mm.)
Sigma 17-70 F/2.8-4 DS Macro HSM (at 50mm.)	Sony 16-105 F3.5-5.6 DT (at 16mm.)	Sony 16-105 F3.5-5.6 DT (at 50mm.)
Sony 16-50 DT F2.8 SAM (at 16mm.)	Sony 16-50 DT F2.8 SAM (at 50mm.)	Sony 18-55 F3.5-5.6 SAM (at 18mm.)
Sony 18-55 F3.5-5.6 SAM (at 50mm.)	Sony 35mm DT F/1.8 SAM (at 35mm.)	Sony 50mm F1.8 SAM DT (at 50mm.)
Sony RX100 mk2's Lens (at 10mm.)	Sony SEL PZ 16-50 F/3.5-5.6 OSS (at 16mm.)	Sony SEL PZ 16-50 F/3.5-5.6 OSS (at 50mm.)
Tamron 17-50 F/2.8 (at 17mm.)	Tamron 17-50 F/2.8 (at 50mm.)	Tamron 18-200 F3.5-6.3 (at 18mm.)
Tamron 18-200 F3.5-6.3 (at 50mm.)	Tokina 11-16mm f2.8 (at 11mm.)	Tokina 11-16mm f2.8 (at 16mm.)
Tokina 28-70mm. F2.8 (at 28mm.)	Tokina 28-70mm. F2.8 (at 35mm.)	Tokina 28-70mm. F2.8 (at 55mm.)

Other Sony 16-50 DT F2.8 SAM vs. Tamron 17-50 F/2.8 Comparisons
	Tamron 17-50 vs. Sony 16-50 Sharpness at 28mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Sony 16-50 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sony 16-50 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8, F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-50 vs. Tamron 17-50 Sharpness at 50mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-50 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11

Other Comparisons of Sony 16-50 DT F2.8 SAM
	Tamron 18-200 vs. Sony 16-50 Sharpness at 28mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
	Tokina 28-70 2.8 vs. Sony 16-50 Sharpness at 28mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Minolta 28-70 2.8 vs. Sony 16-50 Sharpness at 28mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Sony 16-105 vs. Sony 16-50 Sharpness at 28mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
	Sigma 17-70 vs. Sony 16-50 Sharpness at 28mm. Tested Apertures F2.8/F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Sony 18-55 vs. Sony 16-50 Sharpness at 28mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
	Cosina 19-35 vs. Sony 16-50 Sharpness at 28mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
	Minolta 28-105 vs. Sony 16-50 Sharpness at 28mm. Tested Apertures F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Sony 16-50 vs. Minolta 35-105mm. Sharpness at 35mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sony 16-50 vs. Minolta 28-105 Sharpness at 35mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sony 16-50 vs. Sony 35mm 1.8 Sharpness at 35mm. Tested Apertures F1.8/F2.8, F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sony 16-50 vs. Cosina 19-35 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sony 16-50 vs. Sigma 17-70 Sharpness at 35mm. Tested Apertures F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sony 16-105 vs. Sony 16-50 Sharpness at 35mm. Tested Apertures F2.8/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F7.1, F8
	Minolta 28-70 2.8 vs. Sony 16-50 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Tokina 28-70 2.8 vs. Sony 16-50 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sony 18-55 vs. Sony 16-50 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
	Tamron 18-200 vs. Sony 16-50 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sony 16-50 vs. Minolta 35-105mm. Sharpness at 35mm. Tested Apertures F2.8/F3.5, F3.2/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-50 vs. Cosina 19-35 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.2/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-50 vs. Tamron 18-200 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.2/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-50 vs. Sigma 17-70 Sharpness at 35mm. Tested Apertures F2.8/F3.5, F3.2/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-50 vs. Sony 16-105 Sharpness at 35mm. Tested Apertures F2.8/F5, F3.2/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-50 vs. Sony 35mm 1.8 Sharpness at 35mm. Tested Apertures F1.8/F2.8, F2/F2.8, F2.2/F2.8, F2.5/F2.8, F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Minolta 28-70 2.8 vs. Sony 16-50 Sharpness at 35mm. Tested Apertures F2.8, F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 18-55 vs. Sony 16-50 Sharpness at 35mm. Tested Apertures F2.8/F5, F3.2/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tokina 28-70 2.8 vs. Sony 16-50 Sharpness at 35mm. Tested Apertures F2.8, F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-50 vs. Minolta 35-105mm. Sharpness at 50mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-50 vs. Sony 18-55 Sharpness at 50mm. Tested Apertures F2.8/F5.6, F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-50 vs. Tamron 18-200 Sharpness at 50mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-105 vs. Sony 16-50 Sharpness at 50mm. Tested Apertures F2.8/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Minolta 50mm 1.4 vs. Sony 16-50 Sharpness at 50mm. Tested Apertures F1.4/F2.8, F1.6/F2.8, F1.7/F2.8, F2/F2.8, F2.2/F2.8, F2.5/F2.8, F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Minolta 28-70 2.8 vs. Sony 16-50 Sharpness at 50mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tokina 28-70 2.8 vs. Sony 16-50 Sharpness at 50mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sigma 50mm 2.8 vs. Sony 16-50 Sharpness at 50mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sigma 17-70 vs. Sony 16-50 Sharpness at 50mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	CZ Jena Pancolar 50mm 1.8 vs. Sony 16-50 Sharpness at 50mm. Tested Apertures F2.8, F3.5/F4, F4, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1/F8, F8, F9, F10/F11, F11
	Sony 16-50 vs. Minolta 35-105mm. Sharpness at 35mm. Tested Apertures F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11
	Sony 16-50 vs. Sony 35mm 1.8 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11
	Sony 16-50 vs. Cosina 19-35 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F8, F11
	Sony 16-50 vs. Sony 18-55 Sharpness at 35mm. Tested Apertures F2.8/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F8, F11
	Sony 16-50 vs. Tamron 18-200 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F8, F11
	Sony 16-50 vs. Sigma 17-70 Sharpness at 35mm. Tested Apertures F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11
	Sony 16-50 vs. Sony 16-105 Sharpness at 35mm. Tested Apertures F2.8/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F8, F11
	Minolta 28-70 2.8 vs. Sony 16-50 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11
	Tokina 28-70 2.8 vs. Sony 16-50 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11
	Sony 16-50 vs. Tamron 18-200 Sharpness at 50mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F10
	Sony 16-50 vs. Minolta 50mm 1.4 Sharpness at 50mm. Tested Apertures F1.4/F2.8, F1.7/F2.8, F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F10
	Sony 16-50 vs. Sony 18-55 Sharpness at 50mm. Tested Apertures F2.8/F5.6, F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8, F10

Other Comparisons of Tamron 17-50 F/2.8
	Tamron 17-50 vs. Tamron 18-200 Sharpness at 28mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
	Tamron 17-50 vs. Tokina 28-70 2.8 Sharpness at 28mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Tamron 17-50 vs. Minolta 28-70 2.8 Sharpness at 28mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Tamron 17-50 vs. Sony 16-105 Sharpness at 28mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
	Tamron 17-50 vs. Sigma 17-70 Sharpness at 28mm. Tested Apertures F2.8/F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Tamron 17-50 vs. Sony 18-55 Sharpness at 28mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
	Tamron 17-50 vs. Cosina 19-35 Sharpness at 28mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
	Minolta 28-105 vs. Tamron 17-50 Sharpness at 28mm. Tested Apertures F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Tamron 17-50 vs. Minolta 35-105mm. Sharpness at 35mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Tamron 17-50 vs. Minolta 28-105 Sharpness at 35mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Tamron 17-50 vs. Sony 35mm 1.8 Sharpness at 35mm. Tested Apertures F1.8/F2.8, F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Cosina 19-35 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sigma 17-70 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sony 16-105 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F7.1, F8
	Minolta 28-70 2.8 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Tokina 28-70 2.8 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sony 18-55 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
	Tamron 18-200 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
	Tamron 17-50 vs. Minolta 35-105mm. Sharpness at 35mm. Tested Apertures F2.8/F3.5, F3.2/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tamron 17-50 vs. Cosina 19-35 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.2/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tamron 17-50 vs. Tamron 18-200 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.2/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tamron 17-50 vs. Sigma 17-70 Sharpness at 35mm. Tested Apertures F2.8/F3.5, F3.2/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tamron 17-50 vs. Sony 16-105 Sharpness at 35mm. Tested Apertures F2.8/F5, F3.2/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tamron 17-50 vs. Sony 35mm 1.8 Sharpness at 35mm. Tested Apertures F1.8/F2.8, F2/F2.8, F2.2/F2.8, F2.5/F2.8, F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Minolta 28-70 2.8 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8, F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 18-55 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8/F5, F3.2/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tokina 28-70 2.8 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8, F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tamron 17-50 vs. Minolta 35-105mm. Sharpness at 50mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tamron 17-50 vs. Sony 18-55 Sharpness at 50mm. Tested Apertures F2.8/F5.6, F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tamron 18-200 vs. Tamron 17-50 Sharpness at 50mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sony 16-105 vs. Tamron 17-50 Sharpness at 50mm. Tested Apertures F2.8/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Minolta 50mm 1.4 vs. Tamron 17-50 Sharpness at 50mm. Tested Apertures F1.4/F2.8, F1.6/F2.8, F1.7/F2.8, F2/F2.8, F2.2/F2.8, F2.5/F2.8, F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Minolta 28-70 2.8 vs. Tamron 17-50 Sharpness at 50mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Tokina 28-70 2.8 vs. Tamron 17-50 Sharpness at 50mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sigma 50mm 2.8 vs. Tamron 17-50 Sharpness at 50mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	Sigma 17-70 vs. Tamron 17-50 Sharpness at 50mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F9, F10, F11
	CZ Jena Pancolar 50mm 1.8 vs. Tamron 17-50 Sharpness at 50mm. Tested Apertures F2.8, F3.5/F4, F4, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1/F8, F8, F9, F10/F11, F11
	Tamron 17-50 vs. Minolta 35-105mm. Sharpness at 35mm. Tested Apertures F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11
	Tamron 17-50 vs. Sony 35mm 1.8 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11
	Tamron 17-50 vs. Cosina 19-35 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F8, F11
	Tamron 17-50 vs. Sony 18-55 Sharpness at 35mm. Tested Apertures F2.8/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F8, F11
	Tamron 17-50 vs. Tamron 18-200 Sharpness at 35mm. Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F8, F11
	Tamron 17-50 vs. Sigma 17-70 Sharpness at 35mm. Tested Apertures F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11
	Tamron 17-50 vs. Sony 16-105 Sharpness at 35mm. Tested Apertures F2.8/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F8, F11
	Minolta 28-70 2.8 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11
	Tokina 28-70 2.8 vs. Tamron 17-50 Sharpness at 35mm. Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F11