Vivitar 1.4x Auto Focus Tele Converter for Pentax

2018-06-28T10:37:17

I've had this inexpensive 1.4x teleconverter in my kit for a couple of years. I've used it with my D7100 and my D810. Also used with 18-300m Nikon DX, Tamron 150-600mm FX, and Sigma 85mm Art lens. It always works. It goes on snug but not too tight. As with any teleconverter it will darken a bit and the image quality suffers a little bit. For the price I have nothing to complain about, especially if just a bit more reach is needed. The attached photo was taken with a Vivatar 1.4 with a Nikon 18-300 @ 300mm on a D7100 using a 18stop ND filter.

John J.

2018-03-23T08:57:36

I wanted a good converter to work with my Nikons and assorted lenses. This converter does not work with my cameras or the lense I have.

KEN C.

2014-03-10T21:00:00

A little disappointed because it doesn't work with my main lenses: DA* 16-50 and Sigma 70-200 2.8 (HSM lenses just keep hunting and flashing) Somebody said don't use tele converter with wide angle lenses, but the auto focus works fine with the DA 18-250mm and FA 24-90mm and don't know why It doesn't work with my FA-100 2.8 (?!)

kngraphix

2011-11-28T19:00:00

Finally. It took a very old friend "Vivitar" two tries, but this on really works. I do not write reviews but thought this one needed writing. Less than $100.00, great value. Tight fit even on my very used K10d. Two Tamron and one Pentax lens. A little slow finding infinity and focusing first start, Fine after that.

BERT M.