Sigma 17-70 vs. Sigma 50mm 2.8 Sharpness Comparison (at 50mm.)

Comparison # 70
Lens Sharpness Comparison
Sigma 17-70 vs. Sigma 50mm 2.8
Sharpness at 50mm. Tested Apertures F4, F8
	Comparison by Sinan Ozturk

At 50mm Sigma 17-70's widest aperture is F4 so in the first comparison both lenses were compared at F4. At this aperture their center sharpness performance is very close but Sigma 50mm is still one step ahead. Unfortunately the photos are not giving a very good idea for corner sharpness and I apologize for that but if you zoom to right bottom corner, I guess you'll also agree with me that Signa 50mm is also better in corners at this aperture. At F4 Sigma 17-70 also have a vignetting problem and this is why its photo is much darker than Sigma 50mm.

When both lenses were stopped down to F8, Sigma 17-70's vignetting problem is mostly cured (yet Sigma 50mm still have a brighter photo). And Sigma 50mm is still has better sharpness both in centers and corners. Sigma 17-70's center performance comes close (but not on par) but it is still not close in corner performance. [Review by Sinan Ozturk]

Comparison Photo # 1

Photo_193Sigma 50mm F/2.8 DG Macro

against

Photo_195 Sigma 17-70 F/2.8-4 DS Macro HSM

F4.0

1/1000 ISO

100

50mm.

F4.0

1/800

100

50mm.

Photo by Sinan Ozturk

100% (1:1) Crop Samples

Sigma 50mm F/2.8 DG Macro

Focus Point

F/4.0

Brightness 160

(Almost Same)

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

F/4.0

Brightness 157

(Almost Same)

Display crops in Black & White

EXIF

Comparison Photo # 2

Photo_194Sigma 50mm F/2.8 DG Macro

against

Photo_196 Sigma 17-70 F/2.8-4 DS Macro HSM

F8.0

1/250

100

50mm.

F8.0

1/200

100

50mm.

Click to expand comparison photos.

100% (1:1) Crop Samples

Sigma 50mm F/2.8 DG Macro

Focus Point

F/8.0

Brightness 171

(Almost Same)

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

F/8.0

Brightness 173

(Almost Same)

Display crops in Black & White

EXIF

Other Sigma 17-70 F/2.8-4 DS Macro HSM vs. Sigma 50mm F/2.8 DG Macro Comparisons
	Sigma 17-70 vs. Sigma 50mm 2.8 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
	Sigma 50mm 2.8 vs. Sigma 17-70 Sharpness at 50mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F10
	Sigma 17-70 vs. Sigma 50mm 2.8 Sharpness at 50mm. Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
	Sigma 17-70 vs. Sigma 50mm 2.8 Sharpness at 50mm. Tested Apertures F2.8/F4, F4, F5, F5.6, F6.3, F8, F10
	Sigma 17-70 vs. Sigma 50mm 2.8 Sharpness at 50mm. Tested Apertures F2.8/F4, F4/F4.5, 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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