Art and Photography

Question about my lens... pls help

  • Last Updated:
  • Nov 25th, 2009 2:30 am
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[OP]
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Jul 20, 2005
792 posts
28 upvotes

Question about my lens... pls help

Hi guys i have a question, i took a picture on the same distance using a tripod with 2 kinds of lens but give me wrong result from my tamron lens... how come I can get closer result using my Canon than my tamron? why is that happening?

I used Canon EFS 55-250 and Tamron 18-270 VC from the pictures below.


this picture below was taken using Canon 55-250 mm

[IMG]http://img692.imageshack.us/img692/6558/mg4563o.jpg[/IMG]

Camera model Canon EOS DIGITAL REBEL XSi
Orientation Normal
Flash used Yes CCD width 0.00mm
Focal length 250.0mm (250/1) (35mm equivalent: 4500000mm)
Exposure time 0.600 s (6/10)
Lens F-Number f/5.6 Aperture f/250.0 ISO 400 Exposure bias 0.00(0/1) Whitebalance auto
Metering Mode center weight
Exposure aperture priority (semi-auto)
Jpeg Quality 6

and this one is taken using Tamron 18-270mm VC


[IMG]http://img692.imageshack.us/img692/5494/mg4563.jpg[/IMG]


Camera model Canon EOS DIGITAL REBEL XSi
Orientation Normal
Flash used Yes CCD width 0.00mm
Focal length 270.0mm (270/1) (35mm equivalent: 4860000mm)
Date/Time 2009-11-25 01:39:25 Exposure time 0.600 s (6/10) Lens F-Number f/6.3 Aperture f/270.0 ISO 400 Exposure bias 0.00 (0/1)
Whitebalance auto
Metering Mode center weight
Exposure aperture priority (semi-auto)
Jpeg Quality 6
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3 replies
Deal Fanatic
Feb 2, 2007
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Every lens has it's own minimum focusing distance.

It's how it's built.

On the spec sheet, you'll see the minimum focusing distance, such as 20cm, 40cm, 1.5m, etc.
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Deal Expert
Mar 25, 2005
21266 posts
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Two different optical designs. Shoot both 25' away from the subject then compare.
[OP]
Sr. Member
User avatar
Jul 20, 2005
792 posts
28 upvotes
Kasakato wrote:
Nov 25th, 2009 2:25 am
Two different optical designs. Shoot both 25' away from the subject then compare.
thanks for the quick response guys... i'll try and do that!
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