Need help with teleconverters!

Discussion in 'Beyond the Basics' started by catweh00, Mar 18, 2005.

  1. catweh00

    catweh00 TPF Noob!

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    Which teleconverter should I buy for a nikkor 300mm f/4.5 AI? Helo please!
    Thanks everyone!
    1.4 or 2x are fine, I just don't know which brands are best, etc.
    Craig
     
  2. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Keep in mind that teleconverter are used at the expense of light. A 2X TC will cost you about two stops of light. So with a maximum aperture of 4.5, you would lose two stops and be at about F8. Auto focus will most likely not work and the viewfinder would be pretty dark.
     
  3. mikerfns

    mikerfns TPF Noob!

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    Buy the best - the TC that is optimized for this lens. That would be a Nikon TC-14B (outrageously expensive new, but very reasonable used). Any third party TC, other than perhaps a high end Kenko Pro 300 1.4x or Tamron SP 1.4x (these are designed for AF lenses but will fit a MF lens), is likely to be a big disappointment.

    2X is not really an option if you want to retain quality with this lens. You will essentially be left with a f/9.5 lens wide open, and you will not get sharp results unless you stop down at least a couple of stops to an effective f/16-22 or so. Not a very usable speed for a 600mm lens.

    Mike
     
  4. airgunr

    airgunr TPF Noob!

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    I would also suggest sticking with the Nikon ones but the Kenko TC's will also preserve the Autofocus (although it will be a little sluggish). I'm assuming it is an Autofocus lense.
     

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