This looks like an excellent site. Thanks, Dan.
george
Dan Medley wrote:
> I find that the varimagnifider is an indespensible tool for focusing
> through a telescope for a number of reasons. To begin with, it allows me
> to comfortably view the image (it rotates 360º) when it would otherwise be
> akward. When the tube is pointing near verticle, viewing through the
> cameras viewfinder would require you to be on the ground looking up. With
> the 90º rotating extension, I can position the viewer to a more comfortable
> position.
>
> More importantly, however, it allows me to do a precise focus with a
> focusing mask, and the 2x magnification it provides. Simple put, when the
> scope is pointed at a bright star (for focusing prior to framing the image)
> the mask will produce a 'double' image of the star when the scope is out of
> focus. Focusing is done by 'merging' the two stars together. The 2x
> magnification lets me do this more precisely.
>
> The varimagnifinder would also come in hand with other focusing methods
> like the knife edge focusing technique. For further information about
> focusing, try this page:
>
> http://www.isomedia.com/homes/cvedeler/scope/focus.htm
>
> I hope this helps you out.
>
> Regards,
> Dan Medley
>
> < This message was delivered via the Olympus Mailing List >
> < For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
> < Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|