Thanks Vic,
I have a 7-element 2x Tamron. I'll try that. And the AF 1.7x TC as
well.
Jostein
----- Original Message -----
From: "Vic MacBournie" <[EMAIL PROTECTED]>
To: <pentax-discuss@pdml.net>
Sent: Monday, December 19, 2005 2:32 PM
Subject: Re: Stacking lenses for macro.
Would the Vivitar macro convertor get you there? I happen to have
one for sale but I'm thinking that the combination of doubling and
extending the lens out would increase your magnification
substantially...
Vic
On 19-Dec-05, at 8:07 AM, Jostein wrote:
Tell your friend it's a great pic, Sylwek. :-)
I'm looking for something to achieve ca. 4x magnification.
I have a bellows with a total extension of 130mm. That gives
roughly 2.5x with
a
50mm. A good 28mm lens would probably be optimal with a bellows,
giving 4x at
112mm extension.
Or maybe the 31mm limited? The built-in lens hood is a PITA...
However, a bellows solution is a second best. I hope to find an
optically good
combination of two stacked lenses to give 4x. It is so much more
convenient in
the field to use open-aperture metering...:-)
So far I've tried FA 100/2.8 macro with FA* 24/2, and A*200/4 macro
with FA
50/1.4. The latter is a lot better than the former, but still not
quite there.
Stopping down the 50mm to f/2 improves contrast, but introduce more
optical
errors with small apertures on the 200. This leads me to believe
that the best
50mm would be the one that is the sharpest at full opening,
whatever that may
be...
Jostein
Quoting Sylwester Pietrzyk <[EMAIL PROTECTED]>:
Jostein wrote on 19.12.05 12:34:
I'd be interested to know if you have some experiences with
moderate
wide-angles
reversed on a bellows as well.
My friend who is well known macro photographer in Poland took a 13
mm lens
from 8 mm film camera and reverse mounted it on *istD achieving
magnification of roughly 7:1. Rsults are quite impressive like one
here:
http://www.plfoto.com/zdjecie.php?picture=329380
--
Balance is the ultimate good...
Best Regards
Sylwek
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