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






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

Sony Cyber-shot H400
Canon ELPH 340 IXUS 265
Canon G7X
Nikon P530
Canon SX520 HS
Canon G1 X Mark II
Panasonic Lumix FZ1000
Panasonic TZ60 / ZS40
Sony RX100 III review
Sony A3000 review
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



 
Support me by shopping at Amazon!
Pentax DA 40mm and 70mm Limited lens review, tested with Pentax K10D Gordon Laing, April 2007

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

Support this site by shopping via these links

 
 
 
Pentax DA 40 and 70mm lens uniformity, tested with Pentax K10D

To measure lens vignetting and light fall-off we photographed a white target with a highly diffused filter. The lenses were tested with their apertures wide open using a Pentax K10D in Aperture Priority mode; the DA 18-55mm was tested at both 18 and 55mm focal lengths. The images were analysed with Imatest and the full areas presented here at a reduced resolution. Bigger percentages are better.

Using the Pentax 40 and 70mm lenses with their apertures wide open sees the light fall-off in the corners to 70.2 and 73.2% of the centre measurement respectively. These are good results considering their maximum apertures, but nothing remarkable. It's interesting to note the kit lens zoomed-into 55mm delivers less light fall-off, albeit with a far less impressive maximum aperture.


Pentax DA 18-55mm f3.5-5.6 AL
Pentax DA 40mm f2.8 Limited
Pentax DA 70mm f2.4 Limited
Pentax 18-55mm uniformity at 18mm f3.5
Pentax 18-55mm uniformity at 55mm f5.6
Pentax 40mm uniformity at 40mm f2.8
Pentax 70mm uniformity at 70mm f2.4
DA 18-55mm at 18mm f3.5
Mean corner fall-off: 61.8%
DA 18-55mm at 55mm f5.6
Mean corner fall-off: 81.1%
DA 40mm at f2.8
Mean corner fall-off: 70.2%
DA 70mm at f2.4
Mean corner fall-off: 73.2%

Pentax DA 40 and 70mm lens results

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

If you found this review useful, please support us by shopping below!
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