"John Burns" <someone@invalid.net> wrote in message
news:blhud7$9fr$1@lust.ihug.co.nz...

Hi there,
I have been viewing the pictures taken by Chuck Clark from Tikaboo peak.
I note that the focal length of his telescope was 1250mm and then he used

2

2x adaptors to quadruple the power from it. This was a total of 5000mm

focal

length lens.
To calculate the zoom on these photos, do you divide the focal length by
35mm (being the film size)? Or is there some other way of accurately doing
this.?
I have access to a telescope which with the same setup of teleconverters
will give an 8000mm focal length.  I am trying to work out if this is

worth

carting all the way up the peak.

Regards
-John

From my experience, a set of 7x35 binocs are overkill ...
Pr0n is on the net now, no need for elaborate setups ...