Re: zoom eyepiece
- From: "Duncan" <dunks.spamcan@xxxxxxxxxxxxxx>
- Date: Thu, 26 Feb 2009 22:59:03 -0000
"Alan Gardiner" <alan.gardiner@xxxxxxxxxx> wrote in message
news:6a127eedkjow$.1rvyp750y1fuk$.dlg@xxxxxxxxxxxxx
The only thing I would add to Malcolm's comments is that if you intend to
use the telescope for digital photography then the choice of eyepiece is
critical.
If the eye relief is not large enough the image will not fill the field of
view of the camera. The only way to be sure is to test your digital camera
against the eyepiece.
I use fixed magnifiaction eyepieces since at the time I was not impressed
by the quality of the zoom eyepieces, they have improved a lot recently
and
are very versatile.
Alan
I'd add as well that the twisting ring of a zoom eyepiece can be a right
nuisance if attaching a digital camera, depending on the type of mount you
use. If the camera lens is not dead centre on the camera, its weight pulls
the zoom ring around so you will have to use the zoom lens at either its
maximun or minimum focal length (unless you can put up with corner-ways
pictures!). Another problem I had was that the zoom ring was slightly
different in diameter from the lens barrel, so my digiscoping adapter did
not grip it securely - a problem solved by adding a piece of split plastic
pipe between lens and adapter.
Duncan
.
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