Re: [APML] IC1396 CCD with Schmidt-like FOV

["Robert Gendler" <robgendler@worldnet.att.net>]

Hi Jeff,
Thanks. My original plan was to do HA with the 180mm as
well but the weather didn't cooperate <G>. I settled for the
RGB and it seemed to work out OK. I usually do a blend of the
HA and red data in PS at about 80/20 which brings back the stars
and creates a much better luminance match with the RGB data. 
For Rolands striking image it was necessary to incorporate the 
HA into the red channel in order for the dim nebulosity to have color.
Rob Gendler
Email: robgendler@att.net
Web site: http://www.robgendlerastropics.com/
----- Original Message ----- 
From: "Jeff Ball" <jeffball@zoominternet.net>
To: <astro-photo@seds.org>
Sent: Saturday, August 03, 2002 10:59 AM
Subject: RE: [APML] IC1396 CCD with Schmidt-like FOV


> Rob,
> That is very nice.  Thanks for posting the setup pictures as well.  I am
> curious as to why you would not shoot Halpha on the 180mm setup?  I
> don't know much about this and I am trying to understand when Halpha is
> appropriate and how to assign color to deeper exposures with Halpa and
> deep luminance shots.
> Jeff Ball
> 
> > -----Original Message-----
> > From: owner-astro-photo@seds.org
> > [mailto:owner-astro-photo@seds.org] On Behalf Of Robert Gendler
> > Sent: Saturday, August 03, 2002 10:13 AM
> > To: astro-photo@seds.org
> > Subject: [APML] IC1396 CCD with Schmidt-like FOV
> >
> >
> > Hi all,
> > Using Nikon 180mm and 300mm lenses and the ST10
> > I've created a widefield color image of the IC1396 complex.
> > The inner detail of the nebula was imaged with the 300mm lens
> > (using HA and red as luminance) and the outer portion was
> > taken with the 180mm giving the generous FOV (straight RGB).
> > I believe the FOV and detail compare favorably with schmidt
> > camera and medium format film images of this object which
> > demonstrates that large field color imaging can be done
> > successfully with CCD and camera lenses. The widefield image
> > is at http://www.robgendlerastropics.com/1396Large.html
> > A cropped higher res version is at
> > http://www.robgendlerastropics.com/1396Small.h> tml
> > The lenses
> > were mounted on the ST10 using Steve Mandels
> > adaptor and were secured on the mount using two losmandy
> > adjustable tube rings. The 150mm ring fit perfectly around
> > the ST10 while the 125mm ring
> > supported the lenses. I have two pictures of the setup at
> > http://www.robgendlerastropics.com/camera300.j> pg
> >
> http://www.robgendlerastropics.com/camera180.jpg
> Enjoy!
> 
> Rob Gendler
> Email: robgendler@att.net
> Web site: http://www.robgendlerastropics.com/
> 
> 
> --  APML Archives at <http://astro.umsystem.edu/apml/>  ---
>              Unsubscribe at <majordomo@seds.org>


--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>