Page 1 of 2 12 LastLast
Results 1 to 20 of 21

Thread: Different Between 3rd Party And Canon Lens

  1. #1
    Member
    Join Date
    Dec 2003
    Location
    woodlands
    Posts
    811

    Default Different Between 3rd Party And Canon Lens

    Hi all brother and sister and friends,

    Need yr help,I am attach 4 pictures take by two different lens (Canon 28mm-135mm f3.5-5.6 USM IS and Simga 17mm-35mm f2.8-4.0 EX HSM lens).

    Using same setting at f4.0 ,Shutter speed 1/20,ISO 200,without flash and mount on tripod.

    I personnal found that using Simga lens,the picture is blur and soft compare to Canon lens at the same distance (35mm).

    My main worry is anythings fautly to my Simga lens and the picture is out of focue point.

    Any comment and advise are most welcome.

    Thanks and Regards




  2. #2
    Member
    Join Date
    Dec 2003
    Location
    woodlands
    Posts
    811

    Default

    Sorry no pictures againt


    using Simga lens

    using Simga lens

    using Canon lens

    using Canon lens.

  3. #3
    Member
    Join Date
    Dec 2003
    Location
    woodlands
    Posts
    811

    Default

    Sorry friend,I too old understands computer.Please don't scold OK.

    the missing picture is


    Thanks and Regards.

  4. #4

    Default

    hmmm... is it me or do does everyone not see any pictures?

  5. #5
    Member
    Join Date
    Feb 2003
    Location
    singapore
    Posts
    1,462

    Default

    Quote Originally Posted by peteryeo
    Sorry no pictures againt


    using Simga lens

    using Simga lens

    using Canon lens

    using Canon lens.
    Hi Friend,
    how to compare your pics that you have taken with different type of lens and we cannot see all the pics you have taken

  6. #6
    Member
    Join Date
    Nov 2003
    Location
    Northeast
    Posts
    1,225

    Default

    Anyway first off without looking at the pictures, the comparison isn't a fair one as you are taking the extreme end of your Sigma lens at the max aperture and comparing it with the the middle portion of the focal length of your Canon lens. Most lenses don't perform as well at the extreme of their focal lens, or at their max apertures, with issues of distortion and light fall off coming in. So your lens isn't necessary faulty, and Sigma is isn't necessarily bad.

  7. #7

    Default

    Quote Originally Posted by joe
    Hi Friend,
    how to compare your pics that you have taken with different type of lens and we cannot see all the pics you have taken
    Tell us where ur posting from, maybe someone who uses the same site can tell you how to get the pic posted.

    :edit: hmm ur using tripod, my bad

  8. #8
    Member
    Join Date
    Dec 2003
    Location
    woodlands
    Posts
    811

    Default

    Sorry to everyone,

    I don't know why cannot be view?It is true because I using my office computer also face the same things.

    Can someone help me out.My picture is now in this wedsite www.imageatation.com.

    BTW thanks for all friend for yr kind help.At the same time I may try all way out to see any other way.

    I will post againt.

    Regards

  9. #9
    Member
    Join Date
    Dec 2003
    Location
    woodlands
    Posts
    811

    Default Simga and Canon Lens

    Now I try to down all 4 picture using office PC.

    Regards







  10. #10
    Senior Member
    Join Date
    Jan 2002
    Location
    Singapore
    Posts
    12,938

    Default

    I can't see all the pics. But the "softness" might be due to different focussing points and the shallow depth of field at f4 aperture.

  11. #11
    Deregistered
    Join Date
    May 2003
    Location
    Singapore
    Posts
    81

    Default

    I bought 2 lenses (sigma and canon) recently for my school less than a week ago. Pictures taken at 105mm with a sigma 28-105 f/2.8-4 lens at f4 seems quite soft compared to those taken at the 100mm f4 with a canon 100 f/2. Can I ask for a refund from the shop for the Sigma because the Sigma lens is faulty on the above evidence? I don't wish to be embarassed myself. Advise please, before i go down. Many thanks.

  12. #12
    Member
    Join Date
    Dec 2003
    Location
    woodlands
    Posts
    811

    Default Simga and Canon Lens

    Hi all friends,

    Can all view my picture?If all can view please advise wether my picture is soft or blur.Very important to me.

    Thanks and Regards

  13. #13

    Default

    Quote Originally Posted by Elizabeth Tan
    I bought 2 lenses (sigma and canon) recently for my school less than a week ago. Pictures taken at 105mm with a sigma 28-105 f/2.8-4 lens at f4 seems quite soft compared to those taken at the 100mm f4 with a canon 100 f/2. Can I ask for a refund from the shop for the Sigma because the Sigma lens is faulty on the above evidence? I don't wish to be embarassed myself. Advise please, before i go down. Many thanks.
    Don't think you can ask for refund based on that, they are two different classes of lenses. For Sigma 28-105 taken at f4, you are stretching the limit of the lens. f4 is it's maximum aperture while for canon 100 f/2, f/4 is just a mid aperture with about 1 stop to spare. You might want to try taking picture with Sigma 28-105 at 100 f/8, that would just about be comparable with canon 100 f/2 taken at f/4. JFI, the sigma might still possiblity lose out to the canon f/2.

    Moreover, picture taken with a prime lens is almost always sharper then one taken with a zoom lens.

  14. #14

    Default

    Quote Originally Posted by peteryeo
    Hi all friends,

    Can all view my picture?If all can view please advise wether my picture is soft or blur.Very important to me.

    Thanks and Regards
    Picture too small, can't really see the difference, other then you had taken it with a Digital Camera ...... the red overcast is very obvious ;P.

  15. #15
    Member
    Join Date
    Dec 2003
    Location
    woodlands
    Posts
    811

    Default

    Quote Originally Posted by blurblock
    Picture too small, can't really see the difference, other then you had taken it with a Digital Camera ...... the red overcast is very obvious ;P.
    Hi Friends thank for the reply,

    Can u pls explain what do u mean about the red overcast is very obvious.
    I am using a Canon 10D with between Sigma 17mm-35mm and Canon 28mm-135mm lenses.

    Regards

  16. #16
    Senior Member
    Join Date
    Jan 2002
    Location
    Singapore
    Posts
    12,938

    Default

    Quote Originally Posted by Elizabeth Tan
    I bought 2 lenses (sigma and canon) recently for my school less than a week ago. Pictures taken at 105mm with a sigma 28-105 f/2.8-4 lens at f4 seems quite soft compared to those taken at the 100mm f4 with a canon 100 f/2. Can I ask for a refund from the shop for the Sigma because the Sigma lens is faulty on the above evidence? I don't wish to be embarassed myself. Advise please, before i go down. Many thanks.
    You may ask for an exchange but I doubt the shop will give a refund. Different lenses have different quality and performance (also different prices). It's important to do some research before purchasing. 100 f2 is one of Canon's best lenses and could rival the professional L series in terms of image quality and AF performance (the build is no where as good though and there's no weather sealing). Sigma 28-105, on the other hand, is only an average consumer lens.
    Last edited by mpenza; 12th February 2004 at 12:34 PM.

  17. #17

    Default

    Quote Originally Posted by peteryeo
    Hi Friends thank for the reply,

    Can u pls explain what do u mean about the red overcast is very obvious.
    I am using a Canon 10D with between Sigma 17mm-35mm and Canon 28mm-135mm lenses.

    Regards
    Personal feeling. Picture taken with 10D, indoors, with somethings red around, the red will be greatly exaggerated showing red casting over almost everything around, your towel, for example looks pinkish, even your white flower looks pinkish. That's what happens to most of my indoors shots. Thus I felt you might had used a digital camera to take the picture.

  18. #18
    Deregistered
    Join Date
    May 2003
    Location
    Singapore
    Posts
    81

    Default

    ok i will try to top up to get a better lens instead ... is the canon 28-105 mk II a better lens compared to sigma of the same focal length?

    Quote Originally Posted by mpenza
    You may ask for an exchange but I doubt the shop will give a refund. Different lenses have different quality and performance (also different prices). It's important to do some research before purchasing. 100 f2 is one of Canon's best lenses and could rival the professional L series in terms of image quality and AF performance (the build is no where as good though and there's no weather sealing). Sigma 28-105, on the other hand, is only an average consumer lens.

  19. #19

    Default

    Quote Originally Posted by Elizabeth Tan
    ok i will try to top up to get a better lens instead ... is the canon 28-105 mk II a better lens compared to sigma of the same focal length?

    If you are comparing the quality to a 100 f/2, you will never get anything close (Ok, I am drooling now ... so sue me) ..... well ..... maybe the closest you can get will be Tamron SP AF28-105mm F/2.8 LD Aspherical (IF), if that is the range you are looking for .....

    Lower in optical quality will be Canon EF 28-135mm f/3.5-5.6 IS USM and the Tamron SP AF24-135mm F/3.5-5.6 AD Aspherical (IF).

    28-105 MK II is comparable to Sigma 28-105, so I don't know why you want to switch ........

  20. #20
    Member
    Join Date
    Jul 2003
    Location
    Far North
    Posts
    74

    Default

    In my opinion, I find that both comparsion are apple with orange.

    A good comparsion would be Sigma 24-70 f/2.8 with Canon 24-70 f/2.8, or Sigma 20 f/1.8 with Canon 20 f/2.8, etc

    No offend, but everyone would know that a prime len, eg. 100 is definitely better than a zoom 28-105 whether Canon or Sigma

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •