Tele-convertor for 80-200

bluebell · 8th January 2007

I would like to get a tele-coventor for my 80-200 nikon. Can you guy share your experience, which type and brand of tele-convertor you all use? Is AF can function when using this tele-convertor.
Thanks...

Michael · 25th January 2007

Teleconverter.... that's a double sided sword. Sounds like a great idea to increase you focal length but it comes with a lot of negative points as well.

For starters i would use only a Nikon TC. A TC has glass in it and it has to be of best quality to match your lens (which is a superb one).

Second, you will loose that fantastic large aperture of 2.8. A 2x TC will result in a drop of two stops, hence it becomes 5.6.

Third, the camera's ability to use AF is reduced. The focusing of a lens is adjusted to its focal length. to focus from 5-10m for example you need to turn the focus ring by lets say 1/4 of a turn. With the TC you change the focal length but not the focusing system, which means that in 1/4 turn you focuse now from maybe 5m to 20m. This will result in "hunting" of the AF.

To summarize it:
+ increase in focal length
+ cheap
- loss in sharpness
- loss in aperture
- loss in AF

ExplorerZ · 25th January 2007

go for kenko 1.4x or 2x... cost is about $240 from CP.

iirc mostnikon one can't do AF with non-AFS lens, and they cost a bomb... >2x of kenko.

8th January 2007	#1
bluebell New Member Join Date: Aug 2006 Posts: 19	Tele-convertor for 80-200 I would like to get a tele-coventor for my 80-200 nikon. Can you guy share your experience, which type and brand of tele-convertor you all use? Is AF can function when using this tele-convertor. Thanks...

25th January 2007	#2
Michael Member Join Date: Apr 2005 Location: Woodlands Posts: 706	Re: Tele-convertor for 80-200 Teleconverter.... that's a double sided sword. Sounds like a great idea to increase you focal length but it comes with a lot of negative points as well. For starters i would use only a Nikon TC. A TC has glass in it and it has to be of best quality to match your lens (which is a superb one). Second, you will loose that fantastic large aperture of 2.8. A 2x TC will result in a drop of two stops, hence it becomes 5.6. Third, the camera's ability to use AF is reduced. The focusing of a lens is adjusted to its focal length. to focus from 5-10m for example you need to turn the focus ring by lets say 1/4 of a turn. With the TC you change the focal length but not the focusing system, which means that in 1/4 turn you focuse now from maybe 5m to 20m. This will result in "hunting" of the AF. To summarize it: + increase in focal length + cheap - loss in sharpness - loss in aperture - loss in AF

25th January 2007	#3
ExplorerZ Senior Member Join Date: Jan 2006 Location: West Legion Posts: 6,786	Re: Tele-convertor for 80-200 go for kenko 1.4x or 2x... cost is about $240 from CP. iirc mostnikon one can't do AF with non-AFS lens, and they cost a bomb... >2x of kenko.