Sigma 17-70 (at 70mm.)

Test # 16
Lens Sharpness Test
Sigma 17-70
Sharpness at 70mm. Tested Apertures F4/F8, F4/F5.6, F5.6/F8
	Test by Sinan Ozturk

Shots taken with tripod + remote control. First comparison is Sigma 17-70's widest aperture of at 70mm which is F4. So F4 is compared to F8 which is suppose to be the peak performance aperture. In the second comparison, F4 is compared to 1 stop above F5.6 and third comparison is F5.6 against F8 [Review by Sinan Ozturk]

Comparison Photo # 1

Photo_61Sigma 17-70 F/2.8-4 DS Macro HSM

against

Photo_62 Sigma 17-70 F/2.8-4 DS Macro HSM

F4.0

1/640

100

70mm.

F8.0

1/160

100

70mm.

Photo by Sinan Ozturk

100% (1:1) Crop Samples

Sigma 17-70 F/2.8-4 DS Macro HSM

Focus Point

F/4.0

Brightness 109

(Almost Same)

Sigma 17-70 F/2.8-4 DS Macro HSM
Focus Point

F/8.0

Brightness 113

(Almost Same)

Display crops in Black & White

EXIF

Comparison Photo # 2

Photo_61Sigma 17-70 F/2.8-4 DS Macro HSM

against

Photo_59 Sigma 17-70 F/2.8-4 DS Macro HSM

F4.0

1/640

100

70mm.

F5.6

1/320

100

70mm.

Click to expand comparison photos.

100% (1:1) Crop Samples

Sigma 17-70 F/2.8-4 DS Macro HSM

Focus Point

F/4.0

Brightness 109

(Almost Same)

Sigma 17-70 F/2.8-4 DS Macro HSM
Focus Point

F/5.6

Brightness 120

(Almost Same)

Display crops in Black & White

EXIF

Comparison Photo # 3

Photo_59Sigma 17-70 F/2.8-4 DS Macro HSM

against

Photo_62 Sigma 17-70 F/2.8-4 DS Macro HSM

F5.6

1/320

100

70mm.

F8.0

1/160

100

70mm.

Click to expand comparison photos.

100% (1:1) Crop Samples

Sigma 17-70 F/2.8-4 DS Macro HSM

Focus Point

F/5.6

Brightness 120

(Almost Same)

Sigma 17-70 F/2.8-4 DS Macro HSM
Focus Point

F/8.0

Brightness 113

(Almost Same)

Display crops in Black & White

EXIF

Other Sigma 17-70 F/2.8-4 DS Macro HSM vs. Comparisons
	Sigma 17-70 Sharpness Test at 70mm. at 70mm. Tested Apertures Between F4.0 to F13.0
	Sigma 17-70 Sharpness Test at 17mm. at 17mm. Tested Apertures Between F2.8 to F13.0
	Sigma 17-70 F/2.8 - F4 Video Auto Focus Performance at 17-70mm. Auto Focus Noise (Sound), AF Speed and Focus Hunting Test (in Silent Enviroment)
	Sigma 17-70 Distortion Test Distortion at 50mm.
	Sigma 17-70 Distortion Test Distortion at 17mm.
	Sigma 17-70 F.2.8-4 Sharpness at 50mm. Tested Apertures F4/F8

Other Comparisons of Sigma 17-70 F/2.8-4 DS Macro HSM
	Sigma 17-70 vs. Sony 16-105 Sharpness at 70mm. Tested Apertures F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8
	Sigma 17-70 vs. Minolta 28-105 Sharpness at 70mm. Tested Apertures F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sigma 17-70 vs. Minolta 35-105mm. Sharpness at 70mm. Tested Apertures F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sigma 17-70 vs. Tamron 18-200 Sharpness at 70mm. Tested Apertures F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8
	Minolta 28-70 2.8 vs. Sigma 17-70 Sharpness at 70mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Tokina 28-70 2.8 vs. Sigma 17-70 Sharpness at 70mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	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
	Sigma 17-70 vs. Tamron 18-200 Sharpness at 28mm. Tested Apertures F3.2/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
	Sigma 17-70 vs. Tokina 28-70 2.8 Sharpness at 28mm. Tested Apertures F2.8/F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Sigma 17-70 vs. Minolta 28-70 2.8 Sharpness at 28mm. Tested Apertures F2.8/F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Sigma 17-70 vs. Sony 16-105 Sharpness at 28mm. Tested Apertures F3.2/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
	Sony 18-55 vs. Sigma 17-70 Sharpness at 28mm. Tested Apertures F3.2/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
	Cosina 19-35 vs. Sigma 17-70 Sharpness at 28mm. Tested Apertures F3.2/F4, F3.5/F4, F4, 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
	Minolta 28-105 vs. Sigma 17-70 Sharpness at 28mm. Tested Apertures F3.2/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
	Sigma 17-70 vs. Minolta 35-105mm. Sharpness at 35mm. Tested Apertures F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sigma 17-70 vs. Minolta 28-105 Sharpness at 35mm. Tested Apertures F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sigma 17-70 vs. Sony 35mm 1.8 Sharpness at 35mm. Tested Apertures F1.8/F3.5, F2.8/F3.5, F3.5, F4, 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

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