Warren Kato wrote:
>In a message dated 98-03-02 10:34:04 EST, you write:
>
><< << Small optical prisma that converts the 300/4.5 to a 30X birding tube
>10X42
> binoculars
> >When can one find one of these? Who makes them? What is the cost?
Seems
>> like a good way to justify getting a 300 mm. >>
>Adorama sells one made by Kenko for $84.95. I bought mine from Spiratone
many
>years back (for a bit less). It works great with any telephoto that has a
>tripod plate and turns my so-so 100-500 into a fantastic spotting scope.
>
>Warren Kato
Mine also works very well with the Zuiko 300/4.5, but when I tried it with
the Sigma 400/5.6 it was complete disaster. I guess the optics just weren't
matched at all.
I don't think any serious birder would try this though, a real spotting
scope is much more recommendable. But when photography and weight
considerations (and money!) seems more important, it's a good substitute.
Ulf Westerberg
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