Yes, the effective aperture conversions definitely apply. Does your
camera have any trouble focusing at f/7?
Chuck Norcutt
r.burnette@xxxxxxxxxxxxx wrote:
> Am I the only one using an Olympus EC teleconverter? I use and am
> pleased with the results of using an EC-14 with my lenses and I am
> seriously thinking of adding the EC-20 to my gear.
>
> With all the talk about using the 14-54mm and 50-200mm zooms on
> E-series camera bodies, I am surprised that no one has written about
> using the Olympus EC-14 or EC-20 Teleconverters with them. We all
> know that the 2X (compared to 35mm) equivalency factor for these
> lenses gives us equivalent focal lengths of 28-104mm and 100mm-400mm
> respectively. However, I don't recall anyone mentioning that use of
> the EC-14 (1.4X) will raise that equivalency to 39.2-151.2mm and
> 140-560mm and use of the EC-20 (2X) will raise it to 78.4-302.4mm and
> 200-800mm respectively. Think of the advantage of being able to use
> the 14-54 as a 302mm telephoto upon demand. The advantages of an
> 800mm lens should be obvious to all.
>
> Gurus -- would that still be f2.8-3.5 or is it f5.6-7.0? Does the
> 1.4X or 2X teleconverter "loss factor" still apply? I would expect
> so. Either way, it's pretty darned good for a "convertible" 800mm
> lens.
>
> The converters are a compact and lightweight addition to the lenses
> and add an inconsequential weight and bulk to one's camera bag.
> Granted, the teleconverters are pricey, but when compared to the cost
> of purchasing an equivalent telephoto lens, they are a bargain.
> Especially so since one may revert to the original zoom lens range in
> a matter of seconds. Convenience plus results. Sounds like a
> photographer's dream to me.
>
> For those list members using kit lenses, just do the math. Think of
> what a teleconverter would do for your kit. Depending upon what you
> shoot, you may not need that 14-54mm lens after all. You may need a
> teleconverter instead. The cost is about the same. YMMV ;o)
>
> Robert
>
>
>
>
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