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Thread: Question about lens

  1. #1

    Default Question about lens

    Hi guys, just wanna ask what is the difference between Sigma 18-200mm f3.5-6.3 DC lens and Canon EF-S 18-200mm f3.5-5.6 IS lens?

  2. #2
    Senior Member Numnumball's Avatar
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    Default Re: Question about lens

    Quote Originally Posted by wilsonczh View Post
    Hi guys, just wanna ask what is the difference between Sigma 18-200mm f3.5-6.3 DC lens and Canon EF-S 18-200mm f3.5-5.6 IS lens?
    Have u done ur homework? Or are u merely waiting to be spoonfeed?

    Think by simple googling, and compare reviews ard, u will get ur answer, much faster than what u expect to get here.. as opinions can get to be rather subjective at times.

    http://www.photozone.de/canon-eos/40...n_18200_3556is

    http://www.ephotozine.com/article/Si...-f3563-DC-4354

    HTH
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  3. #3

    Default Re: Question about lens

    Quote Originally Posted by Numnumball View Post
    Have u done ur homework? Or are u merely waiting to be spoonfeed?

    Think by simple googling, and compare reviews ard, u will get ur answer, much faster than what u expect to get here.. as opinions can get to be rather subjective at times.

    http://www.photozone.de/canon-eos/40...n_18200_3556is

    http://www.ephotozine.com/article/Si...-f3563-DC-4354

    HTH
    Erm I don't understand the f numbers behind. cos there's difference between the 2 lens. Mind to explain?

  4. #4
    Senior Member Numnumball's Avatar
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    Default Re: Question about lens

    Quote Originally Posted by wilsonczh View Post
    Erm I don't understand the f numbers behind. cos there's difference between the 2 lens. Mind to explain?
    Thats variable aperture opening.. the way lens are constructed this way.. so ur max aperture opening will change while u zoom..

    Meaning to say when at ur widest focal length (i.e 18 mm), ur aperture can only open up to f3.5 and as u zoom further out, ur aperture will be restricted to just f5.6 at the longest focal length (i.e.200mm)

    f6.3 is 1/3 stop smaller than f5.6 so Canon lens offer more at the longest focal length
    Last edited by Numnumball; 29th June 2010 at 06:35 PM.
    I turned PRO in diaper chg!
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  5. #5

    Default Re: Question about lens

    TS, bro numnumball has already explained it to you. Please do some further reading up on the basics of photography. There is a sticky titled Photography Notes For Newbies done up by Sulhan. You can start off from there.
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    Default Re: Question about lens

    Quote Originally Posted by wilsonczh View Post
    Hi guys, just wanna ask what is the difference between Sigma 18-200mm f3.5-6.3 DC lens and Canon EF-S 18-200mm f3.5-5.6 IS lens?
    Both the Sigma and Canon lenses are built for digital camera. DC is the acronym for Digital for Sigma lens. EF-S signals lenses for APS-C camera bodies or commonly known as 'cropped-sensor' cameras.

    The main difference, besides the different aperture range (F stands for focal ratio or relative aperture), is that the Canon lens has IS (Image Stabiliser). IS is a technology where you can take up to 3 or 4 stops slower (shutter) and your image should remain sharp. IS will not work for motion blur.

    IS is good when you are shooting at a slower shutter speed than the recommended '1/focal length'. E.g. If you are shooting at 100mm, your shutter speed is recommended to be about 1/125. With IS technology, you can shoot at 1/15 or even 1/8.

  7. #7

    Default Re: Question about lens

    Quote Originally Posted by wilsonczh View Post
    Hi guys, just wanna ask what is the difference between Sigma 18-200mm f3.5-6.3 DC lens and Canon EF-S 18-200mm f3.5-5.6 IS lens?
    well other then the technical stuff, the Sigma should be 2 years warranty while Canon is 1 year warranty. May or may not be important.
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  8. #8

    Default Re: Question about lens

    There's really a lot of information condensed in the name of the lens. Both manufactuerers and numerous photography review sites provide extensive converage on both lenses. Please read up on them. It will really help you more than what you can get here.

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