I'm enjoying watching this little series of experiments.
My first approach, given the lenses at hand and an M42 adapter, would
have been to put the M42 Adaptall2 on my Tamron 90/2.5 macro lens and
shoot away.
As I think about it, I wonder if an auto bellows for the pentax screw
mount exists. With double cable release, it would make things quicker to
operate. But then with a standard lens, reversing it might give better
IQ results, and that puts paid to aperture automation.
Have you thought about an adapter to reverse the lens?
An Inquiring Moose
Jim Nichols wrote:
> In past years, I have used a Takumar with a 2x extender to obtain occasional
> closeups with a film SLR. I wanted to find out what this combination would
> do on the E-510.
>
> The linked shot was made with a Takumar 55/1.8 lens and 2x extender mounted
> on a chipped adapter on the E-510. Focusing was done wide open, then the
> lens was stopped down to either 4 or 5.6 for the shot.
>
> I tried this technique with faster moving subjects and had no luck at all.
> This little fellow sat still long enough for me to get the job done. The
> lens combination appears to have possibilities if I can just pick the right
> subjects.
>
> http://gallery.leica-users.org/v/OldNick/Another+Small+One.tif.html
>
> Critiques and comments welcomed.
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