Kenco 2x Teleconverter

[squishio]

i have a nikon d70s and want a cheap 2x teleconverter to use temporaraly with my 18-80 lense
i found this
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=003&item=130014771566&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

does anyone know if autofocus will still work?

 

[Big Mike]

What is the maximum aperture of your lens?

Auto focus on most cameras needs about F5.6 or wider for auto focus to work. A 2X teleconverter will steal about two stops of light. So if your maximum aperture is F4, then auto focus probably will not work, at least not in all situations.

 

[squishio]

max apature is 3.5

 

[cecilc]

max apature is 3.5

I'd be more concerned with the loss of image quality than I would the autofocus .... a 2x really degrades the image, and the "cheaper" the 2x the uglier the image.

If you're going to use a TC at all, I think I'd stick with a 1.4x ... it will keep your autofocus (with a 1 stop loss) and the image won't be degraded as badly.