Re: [APML] Cygnus mosaic (was Fish on the Platter)

["Steve Walters" <swalters@att.net>]

Of course the solution to this is to have 3 schmidt cameras. Loke can tell
us how practical that would be....

Steve...

swalters@att.net
http://astrophoto.home.att.net

----- Original Message -----
From: Steve Walters <swalters@att.net>
To: <astro-photo@seds.org>
Sent: Wednesday, September 05, 2001 6:58 PM
Subject: Re: [APML] Cygnus mosaic (was Fish on the Platter)


> Besides, what benefit would it give? You'd have to expose for 3 times as
> long since the light is split 3 ways. Plus the prisms would be lossy
further
> increasing the light level. Better to do 3 shorter exposures sequentially
> than one long one.
>
> Steve...
>
> swalters@att.net
> http://astrophoto.home.att.net
>
> ----- Original Message -----
> From: Gene Horr <genehorr@texas.net>
> To: <astro-photo@seds.org>
> Sent: Wednesday, September 05, 2001 5:43 PM
> Subject: Re: [APML] Cygnus mosaic (was Fish on the Platter)
>
>
> > cherrio wrote:
> >
> > > Have you ever heard of anyone doing simultaneous tricolor images? Is
it
> > > possible? Someway?
> > > Just a thought?!
> > > With the great minds we have available someone should be able to come
up
> > > with a way to do multiple pick offs into separate CCD through filters
> from
> > > the same source.
> > > Crazy??  Impossible!! Some challenge!!]
> >
> > Actually it is done all of the time <g>.  Just look at any high end
video
> > camera.  They use a prism and three chips.
> >
> > But for film this is a whole other ball of wax.  Prism size and
backfocus
> > demands would make it close to impossible for almost every amateur
> instrument
> > made (assuming you don't add a focal extender) and the image quality
> > would be worse.  After all you have a prism in addition to the filter in
> > the light path.  Plus IIRC prisms become tougher to work with with
> > "faster" light paths.
> >
> > A workable idea for CCD but IMO too much trouble for film unless you
> > have a lot of money to throw at the problem.
> >
> > Gene Horr
> > genehorr@texas.net
> >
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