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Message: <blockquote data-quote="WayneF" data-source="post: 356226" data-attributes="member: 12496">It should work.  Technically, you may need 1.7x instead of 1.4x, because DX is FX/1.5.   Here is FX with a 1.7x teleconverter on a 105mm lens.  Lens does 1:1 by itself, which means it should show 36mm of a ruler.  At 1.7x, then 36/1.7 = 21mm should fill the frame, and it does.  This is f/32, 180 mm.<img src="http://www.scantips.com/g2/800_8745.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Test is not  a DX lens, because the Nikon teleconverter is only compatible with a few longer lens, this 105mm included.  But the 1.7x teleconverter does show frame width / 1.7.</blockquote>