I've used my Promaster 7-element 2X teleconverter with my 50-200mm
kit lens to shoot birds and gotten *decent* results as long as the birds
cooperated and as long as I stayed away from the farthest reaches of the
lens. Of course, the maximum aperture on the 50-200 is f/4, so I
couldn't reasonably expect anything more than just decent.
I'm sure the Pentax has better optics, so you may have better luck than
I have -- most assuredly if you have a wider-aperture zoom.
-- Walt
On 12/2/2010 10:12 AM, P N Stenquist wrote:
On Dec 2, 2010, at 10:31 AM, Eric Weir wrote:
On Dec 2, 2010, at 10:23 AM, P N Stenquist wrote:
The A 2X teleconverters are very good optically. Of course because you're adding glass, a
lens plus converter can never match the performance of the lens alone, but the A 2X
converters are among the best I've seen. Note that I said "converters," because
there are two. The A2X-L can only be used with certain long telephoto lenses. It has a
long snout and can't be attached to other Pentax lenses. The A2X-S fits all Pentax
lenses. I use the A2X-S once in a while with an A400/5.6. It yields good results. My
photo of a dragonfly that's on the opening page of the Pentax Gallery and in their
Premier Collection was shot with this combination on an *istD.
Thanks, Paul. It's the 2X-S.Looks like the price is going to turn out to be
reasonable. And *my* camera is a *ist DS.
Can you use a teleconvertor with a zoom?
Sure. I haven't done use it with a zoom, but I don't see why not. Now that you
mention it, I'll have to give it a try with my DA* 60-250. Might be a good
combo for wildlife. Of course, it would be manual focus only.
Paul
------------------------------------------------------------------------------------------
Eric Weir
Decatur, GA USA
[email protected]
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