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Re: [APML] RE: CLA-7 and ST-7Ei
Joachim and Robert, (Stuart here, Gene posted it for me as I was travelling and
only had work e-mail available). Thanks for your replies and encouragement.
Joachim, your link to the Hutech site showed me a pretty cool alternative to the
CLA-7 that would accomodate LRGB with my camera lenses.
For $149 I can buy a CLA-7 and then I might need a 1.25" IR blocking filter
which I believe will mount inside it for $69 total $218. I could start with the
CLA-7 and see how bad the bloating of the stars comes out. Then either sell it
and go with the Hutech system or just add the IR blocking filter or just run
naked with it. I think this is what I'll do - go filterless till I see what the
stars look like.
For $550 I can buy the IDAS filter set w camera adapter and I'm done.
Or $250 for Steve Mandel's camera adapter AND $800+ for the CFW-8. The same as
$550 would buy me! Amazing! (now, I'm sure Steve's system is brilliant but until
I find myself with an ST-10XME and CFW-8 - or whatever comes next - I think I
can't afford it.) And just to be really clear, Steve replied to my queries over
the weekend and he was GREAT - I just think I need to start small and see how I
do first.
You know, this hobby is amazing. I go looking for one thing and discover
something else I'd been looking for since at least a year ago. What else did I
find that I'd been looking for? A source for drop-in filters for my 400mm
Nikkor! I've looked everywhere and just get blank stares and there it is on the
same page. I have a skylight filter in there now but was thinking about and LPS
filter and there it was. Ha!
Thanks!!!
Stuart
Joachim Plocinski wrote:
> Hi Gene,
>
> Why would one need a CFW to do color CCD?
> You might wanna check out this manual filter set and holder...
> http://www.sciencecenter.net/hutech/idas/35mmset.htm
>
> BTW, I haven't tested it ;-)
> Also, I presume a color filter set would enhanche the quality of any lens,
> as you could focus the image for each color individually, and thereby narrow
> the focus offset caused by chromatic abberation. At least, thats how it
> should be in theory, right??!
>
> regards,
> JP
>
> ----- Original Message -----
> From: "Robert Gendler" <robgendler@worldnet.att.net>
> To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> Sent: Monday, April 07, 2003 4:14 PM
> Subject: Re: [APML] RE: CLA-7 and ST-7Ei
>
> > Stuart,
> > I've heard the CLA-7 will work fine with the ST7. The problem
> > is that most camera lenses are not truly apochromatic and therefore
> > will work best imaging through narrow band filters. Unfiltered images
> > will have bloated stars, etc. That being said you can still have plenty of
> > fun using your lenses until you get a filterwheel.
> > Rob Gendler
> > Email: robgendler@att.net
> > Web site: http://www.robgendlerastropics.com/
> > ----- Original Message -----
> > From: "Gene Horr" <genehorr@houston.rr.com>
> > To: "APML" <astro-photo@seds.org>
> > Sent: Monday, April 07, 2003 9:52 AM
> > Subject: [APML] RE: CLA-7 and ST-7Ei
> >
> >
> > > -----Original Message-----
> > > Behalf Of Stuart J Heggie
> > >
> > > I'm sorry to do this Off Topic but I bought the ST-7Ei to use as an
> > > autoguider for FILM photography but wonder if I can get more mileage out
> > of
> > > it if I buy the CLA-7 to attach my Nikkor lenses to dip my toe into the
> > ccd
> > > world. I have the standard assortment of Nikkor lenses (24, 50, 105,
> > 180ED)
> > > and my poor man's apo refractor: 400mm f3.5 EDIF.
> > >
> > > I corresponded with Steve Mandel about his adapter but I'd need the
> CFW-8
> > > to use his and to buy both would be well over $1000 and I'm not that
> well
> > > funded to buy that right now. (I'd be happy just getting the ST-7
> working
> > > as an autoguider but that's another story).
> > >
> > > So, my long winded question is: Does anyone have experience with the
> CLA-7
> > > to do B&W ccd imaging? The new ones are purported to accept a single
> > filter
> > > so I'd put the IR Blocking filter in there and maybe one day an H-Alpha.
> > >
> > > Thanks!
> > > Stuart Heggie
> > >
> > >
> > >
> > > _______________________________________________
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> >
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