Hi Mark,
Great pics. I'm no expert, but I do have a few thoughts on what I saw. I
think the odd bokeh on the shot of the cardinal is actually lens flare.
Ditto on the Blue Heron (who I recognize :-). The overly detailed bokeh
on the grass shots look like it might just be the result of a fairly
small ap. Speaking of our friend the Heron, we ought to do a Michigan
PDML photo hike when the weather warms up a bit.
Paul
Mark Cassino wrote:
>
> I bought the 400 f2.8 with the intent to generally use it with
> teleconverters. In controlled tests, the sharpness of the lens, even
> with the 2x-L teleconverter, is phenominal.
>
> The only issue that I have run into is that at times the
> teleconverters wreak havoc on the Bokeh. It's weird, but sometimes I
> get beautiful bokehs, sometimes I get odd bokehs were there is
> destinct details in the background (even though they are faint) and
> other times the bokeh looks like a bad mirror lens. Some examples:
>
> Nice Bokeh:
>
> with the 1.4x:
> http://www.markcassino.com/0002/0002n01.htm
>
> with the 2x:
> http://www.markcassino.com/0007/gallery2/0007nbk.htm
>
> Odd Bokeh:
>
> with the 1.4x:
> http://www.markcassino.com/0007/gallery1/0007ne.htm
>
> with the 2x:
> http://www.markcassino.com/0007/gallery2/0007nbu.htm
>
> Ugly Bokeh:
>
> 2x -
> http://www.markcassino.com/0007/gallery2/0007ndx.htm
>
> I don't have any uglies with the 1.4x....
>
> The other draw back to the teleconverters is that they do introduce
> another element of camera shake. I was particularly having problems
> with the 1.4x-L but found that is was just plain loose, and tightening
> a screw helped a lot.
>
> - MCC
>
> At 05:53 PM 3/28/01 +0200, you wrote:
>
> > Hi,
> >
> > has anyone tested the Pentax (F)A* 300mm f2.8 with the Pentax
> > teleconverters.
> >
> > I'm looking for the best telelens investment, filling the 300-600mm
> > focal
> > range.
> > This lens plus teleconverters would give me:
> >
> > 300mm f2.8
> > 420mm f4
> > 600mm f5.6
> >
> > The 300 f4 lens gives 600 f8, which is a bit slow.
> > Any opinions?
> >
> > Frank Wajer
> >
> > -
> > This message is from the Pentax-Discuss Mail List. To unsubscribe,
> > go to http://www.pdml.net and follow the directions. Don't forget to
> > visit the Pentax Users' Gallery at http://pug.komkon.org .
> >
>
> - - - - - - - - - -
> Mark Cassino
> Kalamazoo, MI
> [EMAIL PROTECTED]
> - - - - - - - - - -
> Photos:
> http://www.markcassino.com
> - - - - - - - - - -
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