From: "Bojidar Dimitrov" <[EMAIL PROTECTED]>
> Hi,
>
> a question to the optical-formula gurus. Pentax describes the optics of
> this mirror lens as 6 elements in 4 groups. Looking at the diagram that
> they provide us, I see 8 elements. I will number them 1 through 8 when
> looking from left
Just make sure the focus is set properly when you see
Prince Charles, Britney Spears and Boy George having a
threesome in Buckingham Palace with the curtains wide
open :)
> Is there anybody that actually owns one of these? I
> often though of getting one and starting up my on
> little domestic s
Hello,
about this lense, how good would this make a LX with SD-11 clear for
astrophotopgrahy ? equivalent of this would be 5.8" mirror Smith
Cassegrain. and a 24x36mm eye-piece...
what type of TC could be used with this lense ?
Philippe
> Hi,
>
> a question to the optical-formula
Hi,
a question to the optical-formula gurus. Pentax describes the optics of
this mirror lens as 6 elements in 4 groups. Looking at the diagram that
they provide us, I see 8 elements. I will number them 1 through 8 when
looking from left to right. 1 and 2 as well as 5 and 6 seem to be forming
Pål said:
If you can focus it! I had troubles with the 1000/11. Try to stop down any lens to
F:11 and try focusing it. A 2000mm will be 10 times worse; remeber the focusing
accuracy involved. Its pretty much hopeless in my experience. Focusing bracketing is
mandatory.
I say:
Yes, but Pål, in
on 4/19/01 11:16 AM, O'Neill, William at William.O'[EMAIL PROTECTED] wrote:
> Is there anybody that actually owns one of these? I often though of getting
> one and starting up my on little domestic spy business. You could do some
> neat things with it and some 3200 ASA B&W film!
>
> -
> This m
William wrote:
> Is there anybody that actually owns one of these? I often though of getting one and
>starting up my on little domestic spy >business. You could do some neat things with
>it and some 3200 ASA B&W film!
If you can focus it! I had troubles with the 1000/11. Try to stop down an
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