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Thread: Confuse with DX...

  1. #21

    Default Re: Confuse with DX...

    seems like a lot of confusions here. Please read this from Mansurov:

    http://mansurovs.com/equivalent-foca...iew#more-13135
    Kent Wong Photography |Leica Q & Leica M-P 240 | 75 & 28mm Summilux

  2. #22

    Default Re: Confuse with DX...

    Quote Originally Posted by ZerocoolAstra View Post
    Not for all DX lenses
    Quote Originally Posted by spree86 View Post
    The 35mm f1.8 DX actually works pretty well on a full frame, with very little vignetting.
    sorry, my bad..
    i meant with vignetting but some may cause more severe/pronounced vignetting while others may not be that significant..

    anyway, the true focal lengths of lenses will not change at all, only effective focal lengths (after factor in the crop of the sensor).. perspective wise, it may be slightly different, since the actual focal length is unchanged, leading to difference in background just like what bro Daredevil mentioned.. but, it may not be that significant or noticeable, unless under very close scrutiny..

    so in general, if you are using DX body, both lenses (FF and DX) can be used, but if you are using FF body, you need to test for vignetting if you are using DX lenses (whether you personally are alright with the vignetting, which some lenses may produce significantly more than other..)
    - troubled undergrad -
    Olympus XA/Canon QL17 GIII flickr

  3. #23

    Default Re: Confuse with DX...

    Quote Originally Posted by Rashkae View Post
    Except for background... The 50mm and the 35mm will create a subtly different background perspective and this won't change because APS-C doesn't actually change the focal length, it just crops.
    hmmm....what's the difference on the image details taken by dx camera 35mm and fx camera 50mm. both same 12 megapixels.

  4. #24

    Default Re: Confuse with DX...

    Quote Originally Posted by baggiolee View Post
    hmmm....what's the difference on the image details taken by dx camera 35mm and fx camera 50mm. both same 12 megapixels.
    detail wise, taken all things being equal, no difference in detail resolution, but the telephoto effect which causes the background to appear closer might be more noticeable in the 50mm than the 35mm..

    i think the more noticeable difference in the background perspective is when we compare 300mm on DX and 450mm on FF.. both having the same effective focal length, but different in the background perspective, with the 450mm shows a somewhat closer background than the 300 on DX, although the subject might appear exactly the same dimension in the picture..
    - troubled undergrad -
    Olympus XA/Canon QL17 GIII flickr

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