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Thread: Pros & Cons on 17-55mm vs 24-70mm on a Fx body

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    Question Pros & Cons on 17-55mm vs 24-70mm on a Fx body

    Hi gurus,

    Have a dilemma here... what are your comments on the above?

    having come from the dx background, I only see the difference in focal length. I used the lens simulator in Nikon website and tts what I see.
    Other than tt, is image quality a huge difference?
    I presume both of the focus speed will be on par since both are f2.8?
    Personally, I do feel the tightness when using the 17-55 on the fx body. Besides that, I just have the nagging feeling that it's somehow of an overlap so no point...

    Thanks for your input...

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    Moderator catchlights's Avatar
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    17-55 is a dx lens, it can works on a fx body....... on dx mode.
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    Moderator daredevil123's Avatar
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    Default Re: Pros & Cons on 17-55mm vs 24-70mm on a Fx body

    17-55mm is a dx lens. which means the image circle is smaller. when mounted on a fx camera and shooting in forced fx mode, you will notice dark edges on frame on wider focal lengths.

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    Default Re: Pros & Cons on 17-55mm vs 24-70mm on a Fx body

    Quote Originally Posted by catchlights View Post
    17-55 is a dx lens, it can works on a fx body....... on dx mode.
    Yes, tried tt before. Jus tt it's feels a tat tighter bcos of dx mode and the grey border is around the viewfinder.

    unless the dark edges is on purpose, else it's kinda pointless to shoot it in forced fx mode...

    tts why im in a dilemna if de 24-70mm is needed since de 17-55mm can also double up.

    Find it a waste of money jus for de extra grey border space

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    Moderator catchlights's Avatar
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    Default Re: Pros & Cons on 17-55mm vs 24-70mm on a Fx body

    Quote Originally Posted by EdOkH View Post
    Yes, tried tt before. Jus tt it's feels a tat tighter bcos of dx mode and the grey border is around the viewfinder.

    unless the dark edges is on purpose, else it's kinda pointless to shoot it in forced fx mode...

    tts why im in a dilemna if de 24-70mm is needed since de 17-55mm can also double up.

    Find it a waste of money jus for de extra grey border space
    you are seeing the lens coverage thru a optical viewfinder, it won't and can't "zoom in" for you.
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    Default Re: Pros & Cons on 17-55mm vs 24-70mm on a Fx body

    Quote Originally Posted by EdOkH View Post
    Hi gurus,

    Have a dilemma here... what are your comments on the above?

    having come from the dx background, I only see the difference in focal length. I used the lens simulator in Nikon website and tts what I see.
    Other than tt, is image quality a huge difference?
    I presume both of the focus speed will be on par since both are f2.8?
    Personally, I do feel the tightness when using the 17-55 on the fx body. Besides that, I just have the nagging feeling that it's somehow of an overlap so no point...

    Thanks for your input...
    My advice is to use DX lens on DX body and FX lens on FX body. Wad can a 17-55 do on the FX body that the 24-70 cant? 24-70 can reach 24mm at its widest, 17-55 can only reach the equivalent field-of-view of 25.5mm on FX. At the telephoto end, 17-55 goes only to 82.5mm FX-equivalent while 24-70 reaches to 105mm FX-equivalent when setting the FX camera to shoot in DX mode. If not wide enough, buy a 14-24 or 18-35 FX to complement the 24-70.

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    Senior Member darrrrrrrrrr's Avatar
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    Buy FX camera but sticking to DX lenses.. Then what's the point of buying a FX camera? That, imo, is the bigger waste of money here lol

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    Default Re: Pros & Cons on 17-55mm vs 24-70mm on a Fx body

    Quote Originally Posted by enenyi View Post
    My advice is to use DX lens on DX body and FX lens on FX body. Wad can a 17-55 do on the FX body that the 24-70 cant? 24-70 can reach 24mm at its widest, 17-55 can only reach the equivalent field-of-view of 25.5mm on FX. At the telephoto end, 17-55 goes only to 82.5mm FX-equivalent while 24-70 reaches to 105mm FX-equivalent when setting the FX camera to shoot in DX mode. If not wide enough, buy a 14-24 or 18-35 FX to complement the 24-70.
    Plus to add, how much (less) of your FX sensor you are using because you are using a DX lens on it? You do know that right in terms of megapixel ?

    This whole idea of using an FX body and coupled with DX lens is like the analogy of buying a sport car and then buying the cheapest crap tires to save some money. heheh
    Last edited by sammy888; 2nd March 2015 at 10:34 AM. Reason: typo
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    Default Re: Pros & Cons on 17-55mm vs 24-70mm on a Fx body

    Quote Originally Posted by darrrrrrrrrr View Post
    Buy FX camera but sticking to DX lenses.. Then what's the point of buying a FX camera? That, imo, is the bigger waste of money here lol
    Exactly. Many people on DX awaiting to transit to FX (back then when all waiting for FX to emerge), or planning to upgrade from DX to FX..... are all buying FX lenses with the upgrade in mind.

    He is the other way round. LOL
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    Senior Member darrrrrrrrrr's Avatar
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    Quote Originally Posted by sammy888 View Post

    Plus to add, how much (less) of your FX sensor you are using because you are using a DX lens on it? You do know that right in terms of megapixel ?

    This whole idea of using an FX body and coupled with DX lens is like the analogy of buying a sport car and then buying the cheapest crap tires to save some money. heheh
    Haha then end up driving slower than a lower end car with the same tires due to excessive wheelspin.. AKA unused megapixels being thrown away, end up lower megapixel count than a DX sensor.

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