Re: [Leica] Leica R (exension tubes)

[John Gong <jgong@cisco.com>]

Terry,

I really don't understand this proposal.  An extension tube physically
moves the lens outboard from the body.  The intent is for macrophotography,
as the focus point moves such that close focus is possible, but at the
disadvantage of losing distant focus.  If your intent is to photograph
wildlife other than insects at close range, I'm afraid an extension tube is
not what you need.  Your extenders are intended to permit an increase in
effective focal length  and preserving your focus range on a lens.  Are you
sure this isn't what Moose used instead?  With the increase of focal
length, shortened depth of field results in nice blurred backgrounds.


John

 At 07:26 AM 3/25/99 -0800, you wrote:
>I forgot to mention the basis for my inquiry: B. Moose Petersen sent me a 1998
>copy of his quarterly journal which contains a writeup about Nikon's extension
>tubes and his use of them with his F5 and 300 & 600 mm lenses. The effect he
>obtains is wonderful: when photographic wildlife with the extension tubes, the
>background is completely obliterated, leaving only the animals in each picture
>with a pristine, solid background. I'm contemplating buying the 14256 and
using
>it with my 60 mm macro, APO 3.4 180, 280 2.8 APO TELYT, and 400 6.8 TELYT
>lenses on my R8. I have both the 2x and 1.4x extenders but they, of course, do
>not accomplish this effect. I spoke with Niels at Leica-NJ yesterday and he
>assured me the 14256 would.
>
>
>> On Wed, 24 Mar 1999, Terry wrote:
>>
>> >Does Leica manufacture extension tubes for the R fixed focal length and
>> >zoom lenses? I've seen no mentioning of same in Leica's literature and
>> >in books. If  they don't, whose tubes are compatible? Thanks!
>> >
>> >Terry
>