EC14 or EC20

I am considering buying either an EC14 or EC20 teleconverter to use with
a 50-200 lens (Olympus). Which one will be better? For example I have
found the following in Kelby DPB:

"Note : Some pros advise against 2x teleconverters because they feel 2x
photos are not as
sharp and you lose up to two f-stops of light, making it harder to get
the fast shutter speeds
you need...."

Thanks

On Jun 13, 4:58 pm, lady mutant <lady.mut...@mutants.org> wrote:
> I am considering buying either an EC14 or EC20 teleconverter to use
> with a 50-200 lens (Olympus). Which one will be better?
> For example I have
> found the following in Kelby DPB:
>
> "Note : Some pros advise against 2x teleconverters because they feel
> 2x photos are not as sharp and you lose up to two f-stops of light,
> making it harder to get the fast shutter speeds
> you need...."

...And you may lose AF effectiveness or altogether, even with a 1.4...

No direct experience here (only answering because no-one else is!), so
this is worth what you are paying for it..

I'm from the old school, and back in the good ole days, you simply would
not use a TC on a zoom.. But zooms and TC's are a bit better nowadays,
Oly glass is generally pretty darn good and a quick google shows people
are using the EC14 on that zoom, and that it will still AF. It is worth
noting that other similar f-ratio lenses are not recommended for the
EC14 by Olympus - that suggests you are right on the limit of brightness
for the AF, I believe... So I'd doubt if the 2 would be usable in that
regard. But you didn't say if AF is essential for your intended use?

There are some clues that may help here:

http://www.wrotniak.net/photo/43/lenses.html


Good luck - if buying from a store, just ask for a demo, see how the AF
works at the long end of the zoom, and take a few test shots to browse
at home before buying..

Mark Thomas pisze:
> On Jun 13, 4:58 pm, lady mutant <lady.mut...@mutants.org> wrote:

thanks for all the info.
--lm