Support Cameralabs by shopping at our partner stores or donating via Paypal
 






Follow my RSS feed at Camera Labs RSS Feed
 
  Latest camera reviews

Canon EOS 1200D T5
Sony WX350
Nikon P600
Sony Alpha A5000
Sony Cyber-shot HX400V
Panasonic Lumix GH4
Panasonic TS5 FT5
Sony Alpha A6000
Canon SX700 HS
Canon SX600 HS
Olympus TOUGH TG2
Nikon AW1
Nikon D3300
Fujifilm XT1
Olympus STYLUS 1
Sony Cyber-shot RX10
Olympus OMD EM1
Panasonic Lumix GM1
Nikon D610
Sony Alpha A7
Nikon D5300
Canon PowerShot A2500
Sony Alpha A7r
Canon ELPH 130 IXUS 140
Nikon COOLPIX P520
Nikon COOLPIX L820
Canon PowerShot S120
Panasonic Lumix GX7
Canon SX510 HS
Canon PowerShot G16
Fujifilm X20
Panasonic FZ70 / FZ72
Canon EOS 70D
Sony RX100 II
Canon ELPH 330 IXUS 255
Panasonic Lumix GF6
Fujifilm XM1
Olympus EP5
Panasonic Lumix LF1
Panasonic TZ35 / ZS25
Olympus XZ2
Sony HX300
Panasonic Lumix G6
Sony HX50V
Fujifilm X100S
Canon SX280 HS
Canon EOS SL1 / 100D
Panasonic TZ40 / ZS30
Nikon D7100
Nikon COOLPIX A
Fujifilm X-E1
Canon EOS 6D
Nikon D5200
Panasonic Lumix GH3
Canon PowerShot S110
Panasonic Lumix G5
Sony NEX-6
Panasonic Lumix FZ200
Canon PowerShot SX50 HS
Nikon COOLPIX P7700
Olympus E-PL5
Canon EOS M
Panasonic TS20 / FT20
Canon PowerShot G15
Nikon D600
Nikon COOLPIX L810
Canon PowerShot D20
Sony RX100
Panasonic Lumix LX7
Canon SX500 IS
Fujifilm HS30 EXR
Sony HX200V
Panasonic FZ60 / FZ62
Canon 520HS / 500HS
Canon 110HS / 125HS
Nikon D800
Canon EOS T4i / 650D
Canon PowerShot A3400
Panasonic ZS15 / TZ25
Olympus E-M5
Nikon D3200
Fujifilm X-Pro1
Canon PowerShot A2300
Canon SX240 / SX260
Samsung NX200
Sony Alpha SLT-A77
Canon EOS 5D Mark III
Panasonic ZS20 / TZ30
Canon PowerShot G1 X
Sony NEX-7
Panasonic GX1
Olympus E-PM1
Nikon V1
Sony NEX-5N
Canon EOS T3 / 1100D
Canon EOS 600D / T3i
Nikon D7000
Canon EOS 60D
Canon EOS 550D / T2i
Canon EOS 7D

All camera reviews
 
 
   
 
  Best Buys: our top models
   
  Best Canon lens
Best Nikon lens
Best Sony lens
Best budget DSLR
Best mid-range DSLR
Best semi-pro DSLR
Best point and shoot
Best superzoom
Best camera accessories
   
 



Camera Labs Forum

Any questions, comments or a great tip to share? Join my Camera forum and let everyone know!
   
 
  DSLR Tips



 
Free Shipping on ALL Products
Canon EOS 400D / Digital Rebel XTi kit lens upgrade group test Gordon Laing, September 2006 / updated July 2007

More results: Outdoor / Resolution / Corner sharpness / Fringe and macro / Geometry / Vignetting

Canon EOS 400D / Digital Rebel XTi lens upgrade wide-angle uniformity

To measure and compare light fall-off at wide angle, we photographed a white target using a highly diffused custom filter with each lens at its shortest focal length and the aperture wide open. The images were then analysed with Imatest and the full areas presented here at a reduced resolution. Bigger percentages are better.

As with the previous Geometric distortion results, the EF 17-40mm performs best here since it's corrected for a larger and more demanding full-frame body. Interestingly the second best result actually comes from the budget EF-S 18-55mm, followed by the EF-S 17-85mm and finally the EF-S 17-55mm, which loses just over half of its brightness in the extreme corners. To be fair, the EF-S 17-55mm offers an f2.8 aperture throughout its range, but if light fall-off and dark corners really bother you, the EF-S 17-55 and EF-S 17-85 are best avoided at wide angle.

Note: to see how the EF 17-40mm performs on a full-frame body in this respect, check the uniformity results of our Canon 24-105mm review.


Free Shipping on ALL Products
Canon EF-S 17-55mm f/2.8 IS USM
Canon EF-S 17-85mm f/4-5.6 IS USM
Canon EF-S 18-55mm f/3.5-5.6
Canon EF 17-40mm f/4.0L USM
Canon 17-55mm EF-S wide angle uniformity test
Canon 17-85mm EF-S wide angle uniformity test
Canon 18-55mm EF-S wide angle uniformity test
Canon 17-40mm EF L wide angle uniformity test
17-55mm EF-S at 17mm f2.8
Mean corner fall-off: 46.8
17-85mm EF-S at 17mm f4
Mean corner fall-off: 57.8%
18-55mm EF-S at 18mm f3.5
Mean corner fall-off: 68.8%
17-40mm EF L at 17mm f4
Mean corner fall-off: 79.4%



Canon EOS 400D / Digital Rebel XTi lens upgrade telephoto uniformity

To measure and compare light fall-off at telephoto, we photographed a white target using a highly diffused custom filter with each lens at its longest focal length and the aperture wide open. The images were then analysed with Imatest and the full areas presented here at a reduced resolution. Bigger percentages are better.

Our last optical result actually sees the budget EF-S 18-55mm perform best of all, although the EF 17-40mm is right behind it; this is still a great result for the EF-S 18-55mm though, as the EF 17-40mm is an 'L' model that's also designed for a full-frame body. Following the wide angle results above, the EF-S 17-85mm comes third and the EF-S 17-55mm last in this test. Again you have to take the latter's f2.8 aperture into account, but either way, images taken with both of these lenses can noticeably darken in the corners.

Note: to see how the EF 17-40mm performs on a full-frame body in this respect, check the uniformity results of our Canon 24-105mm review.


Canon EF-S 17-55mm f/2.8 IS USM
Canon EF-S 17-85mm f/4-5.6 IS USM
Canon EF-S 18-55mm f/3.5-5.6
Canon EF 17-40mm f/4.0L USM
Canon 17-55mm EF-S telephoto uniformity test
Canon 17-85mm EF-S telephoto uniformity test
Canon 18-55mm EF-S telephoto uniformity test
Canon 17-40mm EF L telephoto uniformity test
17-55mm EF-S at 55mm f2.8
Mean corner fall-off: 60.8%
17-85mm EF-S at 85mm f5.6
Mean corner fall-off: 77.5%
18-55mm EF-S at 55mm f5.6
Mean corner fall-off: 83.8%
17-40mm EF L at 40mm f4
Mean corner fall-off: 82.2%

Canon EOS 400D / Rebel XTi lens upgrade results

Outdoor / Resolution / Corner sharpness / Fringe and macro / Geometry / Vignetting


Support this site by checking prices below or shopping via our affiliate stores


Canon EF-S 17-85 IS USM


 



 



All words, images, videos and layout, copyright 2005-2014 Gordon Laing. May not be used without permission.

/ How we test / Best Cameras / Advertising / Camera reviews / Supporting Camera Labs