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Thread: Wide Angle??? True??? Pls Advise.

  1. #1

    Default Wide Angle??? True??? Pls Advise.

    Hi guys,

    I am also curious & like to experiment a lot.


    Recent i have just compare some of my cameras with a Wide Angle Lens of 0.8X!

    They are put in the exact same position.


    Camera A Lens 14mm

    Camera B Lens 28mm

    If I add a WideAngleLen 0.8X on "Camera B at 28mm" should it be 20mm??
    *Asumming 28mm-8mm=20mm*

    But Adding to 0.8X to CamB, I found some side barrels, therefore i adjust lens to about 32mm Originally.

    Means 32mm - 0.8X W.Lens. Do i get 32mm-8mm = 24mm??

    I have compare with CamA Lens at 14mm & CamB at 24mm*with W.Lens

    Results CamB*24mm produce wider results than CamA *14mm...


    Why is that so??? I really cant get it unless i am very wrong.


    Sorry if i ask silly questions, pls advise. thanks.

  2. #2
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    Default Re: Wide Angle??? True??? Pls Advise.

    You don't minus, the 0.8 means a factor of your focal length.
    Therefore 28mm + 0.8x = 28 x 0.8 = 22.4mm
    32mm + 0.8x = 32 x 0.8 = 25.6mm

  3. #3

    Smile Re: Wide Angle??? True??? Pls Advise.

    thanks for the response.

    But why Camera B *with Wide.Lens wider than 14mm lens from Camera A??

    Can u explain???

    There are no error during test.

    Hope someone out there can explain.

  4. #4
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    Default Re: Wide Angle??? True??? Pls Advise.

    You may want to state what camera A & B are and where you get the focal length from. Different sensor size makes a difference in angle of view.

  5. #5

    Default Re: Wide Angle??? True??? Pls Advise.

    Quote Originally Posted by SpaceParadise View Post
    thanks for the response.

    But why Camera B *with Wide.Lens wider than 14mm lens from Camera A??

    Can u explain???

    There are no error during test.

    Hope someone out there can explain.
    Er, do you happen to have a full-frame DSLR and a non-full-frame DSLR?

    Or well, DSLRs with different crop factors?

    You know, somehow I'm getting this feeling that you're not actually giving lens focal lengths, but something else, hrm.

  6. #6

    Default Re: Wide Angle??? True??? Pls Advise.

    THANKs for the attention guys.


    Well Actually Camera A is a DSLR with 14mm lens at widest.

    Camera B is a Prosumer Bridge camera with 28mm With a 0.8X Wide Lens

    I am certain about the length setting as its indicated directly from both lens.

    DSLR at 14mm
    Bridge Cam at 28mm + 0.8 W.Lens.

    Both Camera place at the exact distance & direction


    I am quiet suprise when i see the results...

  7. #7
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    Default Re: Wide Angle??? True??? Pls Advise.

    Or how about this? What are the models of the cameras that you are comparing? Or is it the same camera with different lenses? This will help a lot.

  8. #8

    Default Re: Wide Angle??? True??? Pls Advise.

    Camera A Produce a much Wider Angle compared with Camera B....

    Hmm.... that really make me confuse....

  9. #9

    Default Re: Wide Angle??? True??? Pls Advise.

    Opz... Typo Error... B wider than A ....

  10. #10

    Default Re: Wide Angle??? True??? Pls Advise.

    Quote Originally Posted by SpaceParadise View Post
    THANKs for the attention guys.


    Well Actually Camera A is a DSLR with 14mm lens at widest.

    Camera B is a Prosumer Bridge camera with 28mm With a 0.8X Wide Lens

    I am certain about the length setting as its indicated directly from both lens.

    DSLR at 14mm
    Bridge Cam at 28mm + 0.8 W.Lens.

    Both Camera place at the exact distance & direction


    I am quiet suprise when i see the results...
    Camera A is what model?

    28 mm on prosumer bridge will be accurate, must take crop factor of DSLR into account, for example, my Pentax K100D has a crop factor of X1.5, so 18-55 becomes 27 to 80+ mm.

    Most common is x1.6, x1.5.. So 14mm will become 21. But it should still be wider. Unless you're using an Olympus or another 4/3 DSLR? Then crop factor will be x2.0 if I'm not wrong. Giving you 28mm. Which means your bridge camera with wide angle convertor will become wider.

    I can't think of another explanation, gah.

  11. #11

    Default Re: Wide Angle??? True??? Pls Advise.

    Unless you tell us the exact model names of your cameras, we can't pinpoint the cause.

  12. #12

    Default Re: Wide Angle??? True??? Pls Advise.

    Camera A is using Zuiko Lens. at 14-45mm...

    Camera B is Fujifilm s9600 with Olympus "Huge" 0.8 Wide Angle Lens....



  13. #13

    Default Re: Wide Angle??? True??? Pls Advise.

    There are not slight, but big difference.... hmm....

  14. #14
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    Default Re: Wide Angle??? True??? Pls Advise.

    Zuiko 14-45 = 28-90 of course the fuji + 0.8x is going to show a wider angle of view..
    Are you also the same SpaceParadise that posted the question ??.

    Quote Originally Posted by HeavensDimension View Post
    Camera A is using Zuiko Lens. at 14-45mm...

    Camera B is Fujifilm s9600 with Olympus "Huge" 0.8 Wide Angle Lens....


    Last edited by Dennis; 10th May 2007 at 11:33 AM.

  15. #15
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    Default Re: Wide Angle??? True??? Pls Advise.

    Quote Originally Posted by HeavensDimension View Post
    Camera A is using Zuiko Lens. at 14-45mm...

    Camera B is Fujifilm s9600 with Olympus "Huge" 0.8 Wide Angle Lens....


    u forget to add another 2x multiplier to the DSLR...
    Logging Off. "You have 2,631 messages stored, of a total 400 allowed." don't PM me.

  16. #16

    Default Re: Wide Angle??? True??? Pls Advise.

    Thanks for all the Senior ADvise...

    I do not know what is muitiply 2X ?


    Pls explain.... many thanks....


    For me, i only know how to take pictures. not too much in specification technically.

    I am more used to those prosumers than DSlrs due to Video Functions...

  17. #17

    Default Re: Wide Angle??? True??? Pls Advise.

    Quote Originally Posted by Dennis View Post
    Are you also the same SpaceParadise that posted the question ??.
    Hahaha! Alt spotted! He even has the same style of creating the usernames.

  18. #18

    Default Re: Wide Angle??? True??? Pls Advise.

    Quote Originally Posted by SpaceParadise View Post
    T
    I do not know what is muitiply 2X ?
    Do a google search for "crop factor"

  19. #19

    Default Re: Wide Angle??? True??? Pls Advise.

    We are friends. Haha, going to his house to some experiments...

    I am also curious...


    thanks Mr Dennis for yr answers... & Thanks to "SuperUser" Senior...

  20. #20
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    Default Re: Wide Angle??? True??? Pls Advise.

    Try this, set the DSLR at 14mm and Fuji cam at 28mm.
    In theory, both cam should be at 28mm due to their corp factor. Take a picture and see if they show the same amount of wide angle.

    The given spec of the corp factor of the Olympus cam is 2x. By computation, fiji cam corp factor is about 4.516.

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