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  1. #11
    Senior Member
    Mediaman09's Avatar

    Re: Fisheye and macro lens recommendatiions for 5100

    Related question .... have I got this right?

    100mm lens on conventional SLR = 100 mm in 35mm format

    100mm FX lens on FX camera = 100 mm in 35 mm format
    100mm FX lens on DX camera = 167 mm in 35 mm format

    100mm DX lens on FX camera = not compatible
    100mm DX lens on DX camera = 167 mm in 35 mm format


    › See More: Fisheye and macro lens recommendatiions for 5100
    NIKON D5100
    NIKON AF-S DX 18-200mm f/3.5 ED VRII (72mm filter)
    NIKON AF-S MICRO 105 mm f/2,8G IF-ED N (62mm filter)
    SIGMA 10-20mm f/4-5.6 EX DC HSM (77 mm filter)
    NIKON NIKKOR 50mm f/1.4 (52mm filter)
    NIKON NIKKOR 43-86mm f/3.5 (52 mm filter)
    NIKON NIKKOR 28mm f/2.8 (52mm filter)
    See details at:
    photo.mediamanhost.com



  2. #12
    Staff
    Moderator

    Re: Fisheye and macro lens recommendatiions for 5100

    Quote Originally Posted by Mediaman09 View Post
    Related question .... have I got this right?

    100mm lens on conventional SLR = 100 mm in 35mm format
    Correct

    100mm FX lens on FX camera = 100 mm in 35 mm format
    Correct

    100mm FX lens on DX camera = 167 mm in 35 mm format
    Incorrect - Nikon has a 1.5x crop factor, so this would be a 150mm in 35mm format

    100mm DX lens on FX camera = not compatible
    Incorrect - the FX camera will step down to DX sensor size so you will get a cropped picture, and at a lower resolution (assuming the FX camera/sensor is capable of doing so)

    100mm DX lens on DX camera = 167 mm in 35 mm format
    Incorrect - Nikon has a 1.5x crop factor, so this would be a 150mm in 35mm format

    I've added answers in the quote above
    Thanks/Like gqtuazon, Philnz Thanks/liked this post
     
    Sam
    Do or do not, there is no try.
    D5100
    18-55mm f/3.5-5.6G VR | 55-200mm f/4-5.6 VR | 18-105mm f/3.5-5.6G VR
    50mm f/1.8G
    SB-400 | SB-700 ​x2



  3. #13
    The Dude
    Dave_W's Avatar

    Re: Fisheye and macro lens recommendatiions for 5100

    Quote Originally Posted by Mediaman09 View Post

    Hmmm, so as the 5100 is a DX formatted camera, should I be concerend that is 105 mm lens is NOT optimized for a DX-format ??

    A lens optimized for DX formatted camearas, sounds like there is some disadvantage in buying an FX lens vs DX lens - What is it?

    Interestingly, FX lenses perform best on DX sensor cameras. Why? Because the DX sensor is only recording light coming from the "sweet spot" section of the lens and thus your images contain little to no vignetting as well as little to no barreling or pinchushing.
    Thanks/Like žam Thanks/liked this post
     

    "i wanna live with a Cinnamon girl
    i could be happy
    the rest of my life
    with a Cinnamon girl...."

    AF-S NIKKOR 14-24mm f/2.8G ED; AF-S DX NIKKOR 18-70mm f/3.5-4.5G IF-ED; AF-S NIKKOR 24-70mm f/2.8G ED; AF-S NIKKOR 28mm f/1.8G; AF-S NIKKOR 70-200mm f/2.8G ED VRII; AF-S NIKKOR 85mm f/1.8G; AF-S Micro-NIKKOR 105mm f/2.8G IF-ED VRII; AF-S NIKKOR 300mm f/2.8G ED VRII;

  4. #14
    Senior Member
    Mediaman09's Avatar

    Re: Fisheye and macro lens recommendatiions for 5100

    Thank you for the corrections re equivalent focal length.

    I updated the list accordingly...but have some new questions re (4) and (6) ...

    1) 100mm lens on conventional SLR = 100 mm in 35mm format
    2) 100mm FX lens on FX camera = 100 mm in 35 mm format
    3) 100mm FX lens on DX camera = 150 mm in 35 mm format ( Nikon has a 1.5x crop factor)
    4) 100mm DX lens on FX camera = 66 mm ?? ( FX camera will step down to DX sensor size so you will get a cropped picture, and at a lower resolution)
    5) 100mm DX lens on DX camera = 150 mm in 35 mm format ( Nikon has a 1.5x crop factor
    6) 100mm Legacy F-mount lens on a DX camera = ?? mm. For example I have an old 28 mm wide angle
    Nikkor f2.8 No. 486439. What is the equivalent focal length on the 5100?
    NIKON D5100
    NIKON AF-S DX 18-200mm f/3.5 ED VRII (72mm filter)
    NIKON AF-S MICRO 105 mm f/2,8G IF-ED N (62mm filter)
    SIGMA 10-20mm f/4-5.6 EX DC HSM (77 mm filter)
    NIKON NIKKOR 50mm f/1.4 (52mm filter)
    NIKON NIKKOR 43-86mm f/3.5 (52 mm filter)
    NIKON NIKKOR 28mm f/2.8 (52mm filter)
    See details at:
    photo.mediamanhost.com

  5. #15
    The Dude
    Dave_W's Avatar

    Re: Fisheye and macro lens recommendatiions for 5100

    4 - a 100mm DX lens on an FX will be 100mm
    5 - I do not believe a DX lens will work very well on a 35mm camera. If it does I suspect you will actually see the areas not covered in the DX lens.
    6 - It will also have the same effect as an FX lens on a DX camera with a crop value of 1.5. So your 28mm lens will have the same field of view as a 42mm lens.

    Keep in mind that a DX camera does not increase the focal length of a lens. We typically referring to a 100mm becoming a 150mm but in fact it just crops out the sides of the image to give the equivalent view that a 150mm lens on an FX camera body would give.
    Thanks/Like Marcel, stmv Thanks/liked this post
     

    "i wanna live with a Cinnamon girl
    i could be happy
    the rest of my life
    with a Cinnamon girl...."

    AF-S NIKKOR 14-24mm f/2.8G ED; AF-S DX NIKKOR 18-70mm f/3.5-4.5G IF-ED; AF-S NIKKOR 24-70mm f/2.8G ED; AF-S NIKKOR 28mm f/1.8G; AF-S NIKKOR 70-200mm f/2.8G ED VRII; AF-S NIKKOR 85mm f/1.8G; AF-S Micro-NIKKOR 105mm f/2.8G IF-ED VRII; AF-S NIKKOR 300mm f/2.8G ED VRII;

  6. #16
    Senior Member
    Mediaman09's Avatar

    Re: Fisheye and macro lens recommendatiions for 5100

    So, if I understand this correctly (what are the chances !! ... ANY lens that I put on my 5100, be it legacy, DX or FX, will have a focal length/field of view as stated on the lens ! And if I interchange them all I will see no difference... ie 100mm DX lens, 100mm FX lens or 100 mm legacy lens will all look the same on my 5100....and all three will look the same as what a 150mm lens would like on an FX camera. Correct? Almost?

    With all these 1.5 multipliers, I had initially (incorrectly) assumed that my new 18mm-200 lens would have the same 'wide angle' view my old legacy 28mm lens ( eg 18 x 1.5 = 27 m which close to 28mm). But in fact, the old 28 mm lens also gets the 1.5 factor as its equivalent to 42mm !. Indeed when I interchange both lenses, the new 18mm is a much wider angle than the old 28mm (ie I am essentially comparing 27 mm to 42mm).

    The point being that, if I got this right (and at the risk of oversimplifying) , I need not be concerned about calculating equivalent focal lengths if I have a mix of DX, FX and legacy lenses ; they will all behave as expected, ie my new 18mm zoom is that much wider than my old legacy 28mm, which is that much wider than my old 43-86 zoom, which is that wider than my new 105 FX macro.
    Last edited by Mediaman09; 01-02-2013 at 06:01 PM.
    NIKON D5100
    NIKON AF-S DX 18-200mm f/3.5 ED VRII (72mm filter)
    NIKON AF-S MICRO 105 mm f/2,8G IF-ED N (62mm filter)
    SIGMA 10-20mm f/4-5.6 EX DC HSM (77 mm filter)
    NIKON NIKKOR 50mm f/1.4 (52mm filter)
    NIKON NIKKOR 43-86mm f/3.5 (52 mm filter)
    NIKON NIKKOR 28mm f/2.8 (52mm filter)
    See details at:
    photo.mediamanhost.com

  7. #17
    The Dude
    Dave_W's Avatar

    Re: Fisheye and macro lens recommendatiions for 5100

    By gummy...I think you've got it!! Nothing you wrote can I disagree with - A DX camera treats all lenses the same. It's only FX cameras that makes any changes to a lens, the DX just powers on.

    "i wanna live with a Cinnamon girl
    i could be happy
    the rest of my life
    with a Cinnamon girl...."

    AF-S NIKKOR 14-24mm f/2.8G ED; AF-S DX NIKKOR 18-70mm f/3.5-4.5G IF-ED; AF-S NIKKOR 24-70mm f/2.8G ED; AF-S NIKKOR 28mm f/1.8G; AF-S NIKKOR 70-200mm f/2.8G ED VRII; AF-S NIKKOR 85mm f/1.8G; AF-S Micro-NIKKOR 105mm f/2.8G IF-ED VRII; AF-S NIKKOR 300mm f/2.8G ED VRII;

  8. #18
    The Dude
    Dave_W's Avatar

    Re: Fisheye and macro lens recommendatiions for 5100

    One thing I would like to add is that an FX lens will perform better on a DX camera than on an FX camera due to the fact the DX imaging cuts out the corners and edges where lenses suffer the most distortion and vignetting. So from my point of view, buying only FX lenses for your DX camera is both good for your IQ and as well as paves the way to move to FX if you ever choose to.

    "i wanna live with a Cinnamon girl
    i could be happy
    the rest of my life
    with a Cinnamon girl...."

    AF-S NIKKOR 14-24mm f/2.8G ED; AF-S DX NIKKOR 18-70mm f/3.5-4.5G IF-ED; AF-S NIKKOR 24-70mm f/2.8G ED; AF-S NIKKOR 28mm f/1.8G; AF-S NIKKOR 70-200mm f/2.8G ED VRII; AF-S NIKKOR 85mm f/1.8G; AF-S Micro-NIKKOR 105mm f/2.8G IF-ED VRII; AF-S NIKKOR 300mm f/2.8G ED VRII;

  9. #19
    Banned

    Re: Fisheye and macro lens recommendatiions for 5100

    If you use your 28mm up close on a DX body it will still distort the perspective just like a wide angle used close up will.

  10. #20
    Senior Member
    Mediaman09's Avatar

    Re: Fisheye and ultra wide angle for 5100 DX

    Quote Originally Posted by Dave_W View Post
    Interestingly, FX lenses perform best on DX sensor cameras. Why? Because the DX sensor is only recording light coming from the "sweet spot" section of the lens and thus your images contain little to no vignetting as well as little to no barreling or pinchushing.
    Old thread I started a while back, but still relevant.

    A nagging question I have is this - How does one reconcile the statement "DX lenses are optimized for DX cameras", with "FX lenses perform best with the DX sensor"

    That is, when choosing a lens for a DX camera, is there a rule of thumb as to whether FX or DX is the wiser lens choice ?


    My next lens purchase, will be an ultra wide angle. Should I be looking for DX or FX or does it not matter at all??

    (Another purchase after that might be a fisheye for special/distorted effects ; less concerned there as I would likely go with a cheaper nin-Nikon choice. )
    NIKON D5100
    NIKON AF-S DX 18-200mm f/3.5 ED VRII (72mm filter)
    NIKON AF-S MICRO 105 mm f/2,8G IF-ED N (62mm filter)
    SIGMA 10-20mm f/4-5.6 EX DC HSM (77 mm filter)
    NIKON NIKKOR 50mm f/1.4 (52mm filter)
    NIKON NIKKOR 43-86mm f/3.5 (52 mm filter)
    NIKON NIKKOR 28mm f/2.8 (52mm filter)
    See details at:
    photo.mediamanhost.com





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