Re: [APML]: focusing

[Mike Regish <mregish@map.com>]

How does the duo view work and how much does it cost?

Kenneth Sperber wrote:

>
> Chris,
>
> I've very successfully used a sure-sharp for several years
> with my 10" f/10 (at f/6.3) for prime focus astrophotography.
> I also have the duo-view which is great for centering the
> object. With a 26mm lens the view is comparable to the
> field of view on the print.
>
> Ken
>
> ----------
> > From: cvedeler@ix.netcom.com
> > To: astro-photo@nightsky.com
> > Subject: Re: [APML]: focusing
> > Date: Wednesday, August 06, 1997 11:02 PM
> >
> >
> > I use the Olympus 1-12 screen.  I still get out of focus shots about
>
> > half the time though.  It is due to lazyness on my part.  The screen
>
> > works great but the center of it is clear.  I have to remember to
> focus
> > on the stars away from the center or my eye adjusts for the focus
> and
> > the picture is ruined.  I use a 6x finder to the viewfinder of the
> > camera to get that extrasharp focus.  I have been getting much
> better
> > focus since I've been doing that.
> >
> > Chris Vedeler
> > http://www.isomedia.com/homes/cvedeler/space.htm
> >
> > Bobby Middleton wrote:
> > >
> > >
> > > Is the sure-sharp a worth-while investment? I've seen a highly
> regarded
> > > member of this
> > > group call it the "not-so-sure-sharp"<g>......anyway, I'm tired of
> hand
> > > guiding for 30 or 45 min. only to find I was out of focus a
> little, and
> I'm
> > > looking for a better way than my
> > > 1-8  focusing screen on my olympus.
> > >
> > > Bobby Middleton
> > > bobbym@webwide.net