[LRflex] Re: bonehead extension tube question (can't afford a 14182)
- From: "Peter M. C. Choy" <pmcc_2000@xxxxxxxxx>
- To: leicareflex@xxxxxxxxxxxxx
- Date: Fri, 2 Sep 2005 19:20:22 -0700 (PDT)
--- David Young <telyt@xxxxxxxxx> wrote:
> On 02/09/2005 at 2:58 PM Peter M. C. Choy wrote:
>
> >Can anyone confirm that
> >the 3-ring extension tube set for
> >Leicaflex can be used on the 400mm/f6.8
> >Telyt? I'd like to try reducing
> >minimum focus and increase image area
> >for long-distance close-ups of small
> >critters.
>
>
> Hi Peter!
>
> If you are an LHSA member, check The Viewfinder, Vol
> 37, Number 3 (Fall,=
> 2004), Page 38. You can see a photo of the 28mm
> Super Angulon-PC taken=
> with the 400mm Telyt and this set of tubes. Working
> distance was about 13=
> feet! And, yes, I used the mirror pre-fire. It
> definitely works very well!
>
> You can also use a 2x converter to get
> closer,(effectively double the focal=
> length but same close focus distance) but there is
> distinctly noticeable=
> vignetting with the original, non-APO converter.
> The newest APO extender=
> does not suffer this problem. There are also the
> problems of holding an=
> 800mm f12.6 lens steady and a reduction in
> resolving power.
>
> Go to:
>
http://www3.telus.net/~telyt/images/pictures/heron72-650.jpg
> for a=
> shot taken with the 400 f6.8 Telyt and the earlier,
> non-APO 2x converter=
> and you'll see the vignetting I'm talking about.
>
> The tubes are a better choice.
>
> Cheers!
>
>
>
> David Young,
> Logan Lake, BC
> CANADA.
David and Doug,
Thanks for your helpful replies. Yes, I am an
LHSA member (and the upcoming meeting will be
in my home town). I will definitely root through my
Viewfinder collection for the article you
refer to.
Thanks to your guidance, I'll happily abandon my
hope of finding the elusive 14182, as well as
the scarce and pricey 2x extender for the SL,
and concentrate on finding a set of plain vanilla
rings. Does it matter whether I get the 14159 for SL
the more readily available 14139? I gather (?)
from my little handbook of accessories that the
former contains a linkage for semi-auto preset
diaphragm operation and the latter does not --
I guess this is a limitation on versatility, but
am I correct in thinking it makes no difference
for using the 400mm Telyt mounted on the SL2?
rgds
Peter.
SF, CA
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