Opteka lenses

[tuomon]

Sounds like many have positive experience e.g. with Kenko and Tiffen teleconverters. How about those clearly less expensive ones, like Opteka: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2929160536&category=30066 ? Are those worth anything? Or is the difference between Optekas and Kenkos evident only in the eyes of professionals?

Thanks for comments!
Tuomo

[SpiDEX]

I have ask this few times in this forum and in dpreview.com.
No one reply me .. so i guess not many ppl use this lenses .... so in the end I gave up .... and try on other brands ....