Lens review

Sigma 100-300 mm f/4 DG EX APO IF HSM

11. Summary

Pros:

• perfect picture quality in the center of the frame at all focal lengths and aperture ranges.
• perfect picture quality at the edges of the frame at 100-200 mm focal length
• chromatic aberration almost invisible at 100 mm focal length
• very small distortion
• perfect coma correction
• very small astigmatism
• no problems with vignetting
• great work against bright light
• fast and quiet autofocus,
• solid body
• well endowed package (carrying case, lens hood cap, inbuilt tripod mount)
• three year guarantee (or up to five years with extra payment)

• visible front focusing
• average picture quality at the edges of frame at 300 mm focal length

Sample shots:

Camera: Canon 20D Parameters: 193 mm, f/7.1, exp. 1/640 sec, ISO 200 File: JPG, 3504x2336 pix, 2.2 MB	Camera: Canon 20D Parameters: 100 mm, f/5.0, exp. 1/125 sec, ISO 400 File: JPG, 3504x2336 pix, 2.6 MB	Camera: Canon 20D Parameters: 100 mm, f/9.0, exp. 1/500 sec, ISO 200 File: JPG, 3504x2336 pix, 2.7 MB
Camera: Canon 20D Parameters: 193 mm, f/10, exp. 1/1250 sec, ISO 200 File: JPG, 3504x2336 pix, 3.2 MB	Camera: Canon 20D Parameters: 300 mm, f/8.0, exp. 1/1250 sec, ISO 200 File: JPG, 3504x2336 pix, 2.9 MB	Camera: Canon 20D Parameters: 300 mm, f/5.6, exp. 1/200 sec, ISO 400 File: JPG, 3504x2336 pix, 2.9 MB
Camera: Canon 20D Parameters: 300 mm, f/5.6, exp. 1/320 sec, ISO 400 File: JPG, 1728x1152 pix, 0.3 MB	Camera: Canon 20D Parameters: 300 mm, f/5.0, exp. 1/1250 sec, ISO 400 File: JPG, 3504x2336 pix, 2.1 MB	Camera: Canon 20D Parameters: 100 mm, f/4.0, exp. 1/60 sec, ISO 200 File: JPG, 3504x2336 pix, 2.6 MB