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Thread: about 2x extender and minimum focusing distance

  1. #1

    Default about 2x extender and minimum focusing distance

    Hmm, if i were to get a 2x extender, will the minimum focusing distance of my Macro lens be multiplied by 2 also?? or it remains the same??

    Also, is it advisable to use a 2x extender for macrography to provide a longer working space?

    btw, i'm using the tamron 90mm macro..

  2. #2

    Default

    MOD will still be the same.

    Not advisable.

    -lose 2 stop of light (harder to MF due to darker VF)
    -lost in image quality
    -more diffcult to handheld due to longer focal lenght(up to individual)

  3. #3
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    Default

    ditto the above.

    As a side note, you will also get double the magnification at the minimum focussing distance. Its up to you whether you find the corresponding loss of image quality acceptable.

  4. #4

    Default

    oh... so that means i'll have to get a longer lens.... booo..

  5. #5
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    Default

    Since the long macro lens are seriously expensive, you might consider the alternate option of going with a long telephoto with extension tubes. I've thought about this problem not too long ago (aka last week ) and asked around in a different website and got this answer:

    A Nikon PN-11 (52.5mm extension) with the 180mm f2.8 ED would get me 1:2.3 with a working distance of 0.66m, while a Micro-Nikkor 105mm f2.8 with a 2X teleconvertor at the same 1:2.3 ratio has a working distance of 0.47m but is able to go down to 2:1.

    I would lose autofocus going the extension tube route (which is sort of moot since I'm doing macro) but would have potentially better image quality than with the 2X.

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