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60784Re: [ccd-newastro] focusing dslr

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  • Yahoo - Wodaski
    Jan 1, 2008
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      Thanks. Of course I can only recommend what I've used, so I appreciate
      you stepping in with details on this software. Thanks again!

      Ron Wodaski

      Bill Logan wrote:
      > Ron et al,
      >
      > I must agree that MaxImDL is probably the premier software for imaging, but
      > for most amateurs starting out in DSLR imaging, is a bit on the expensive
      > side. Currently, I use CCDSoft for capturing that came with my ST-7XMED and
      > AIP4WIN2.0 for processing. For many years however, I used Stark-Labs
      > Nebulosity for capture and processing software with my Canon EOS Rebel XT
      > (350D). I highly recommend this software for beginners for several reasons.
      > It's inexpensive ($45) along with a free download to try it
      > (www.stark-labs.com) and it's very simple to use. The focus and fine focus
      > features are excellent for any DSLR or CCD camera. Not only does it give
      > one a pixel reading of a selected star, but there's an FWHM graphical
      > display. Nebulosity supports all Canon DIGIC II processors which is the
      > Rebel XTi (400D), but will need a Shoestring shutter control adapter for
      > exposures over 30 seconds. In my Nebulosity group, link below, one will
      > find a nice tutorial specifically written for Canon-Nebulosity users. I
      > highly recommend this software because of the price and ease of use until
      > they have gained enough experience imaging to upgrade to the ultimate
      > MaxImDL or any other high end capture and processing program
      >
      > Clear skies,
      >
      > Bill Logan
      > Robert Burnham Jr. Memorial Observatory
      > Eagar, Arizona
      >
      > http://tech.groups.yahoo.com/group/Exoplanet_Astronomers/
      > http://tech.groups.yahoo.com/group/Nebulosity_Astrophotographers/
      >
      >
      >
      >
      >
      > ----- Original Message -----
      > From: "Yahoo - Wodaski" <yahoo@...>
      > To: <ccd-newastro@yahoogroups.com>
      > Sent: Tuesday, January 01, 2008 11:33 AM
      > Subject: Re: [ccd-newastro] focusing dslr
      >
      >
      >> I tried one of these a few years ago, and I wasn't very happy with it
      >> for digital photography. Given that the cost of software is roughly
      >> similar, and that software gives you tons of other options and features
      >> as well, I would recommend going the software route. I've used MaxIm DL
      >> for my DSLR work, and while it's considerably more than $250, it does
      >> work extremely well. <G>
      >>
      >> I know a number of DSLR images who use Images Plus and are very happy
      >> with that, so that's another option.
      >>
      >> The Stilleto got its start in film, where digital acquisition is not
      >> available, and I think it's primary value remains in that area. Even
      >> there, it requires extremely careful physical manipulation to work well.
      >> Film has a larger effective "pixel size" than CCD; the small pixels in
      >> DSLRs makes this even more critically important. I found it virtually
      >> impossible to maintain consistency that was adequate to the requirements
      >> of CCD sensors in astro cameras (figure 7-9 micron pixels); DSLRs often
      >> have even smaller pixels, making focus that much more critical. IMO,
      >> software image acquisition is the way to go.
      >>
      >> Ron Wodaski
      >>
      >> Murray Hammick wrote:
      >>> You can also use a separate focusing aid such as the Stilleto Mk IV which
      >>> can sometimes be found second-hand on Astromart or similar sites for
      >>> reasonable prices. A new one is in the order of about $250 (I think).
      >>>
      >>> Murray
      >>>
      >>>
      >>>
      >>>
      >>> Bill Logan <wb9sat@...> wrote:
      >>> Digital cameras, unlike film cameras must be fine focused on the pixel
      >>> level. You can get a rough focus through the viewfinder, but final
      >>> focusing
      >>> must be done by looking at FWHM (Full-Width, Half Maximum) numbers. You
      >>> can
      >>> use an inexpensive digital capture and processing program such as
      >>> Stark-Labs
      >>> Nebulosity. Nebulosity has a fine focus routine that allows you to fine
      >>> focus using FWHM.
      >>>
      >>> Clear skies,
      >>>
      >>> Bill Logan
      >>> Robert Burnham Jr. Memorial Observatory
      >>>
      >>> http://tech.groups.yahoo.com/group/Exoplanet_Astronomers/
      >>>
      >>> ----- Original Message -----
      >>> From: "firebirdthart" <thart40@...>
      >>> To: <ccd-newastro@yahoogroups.com>
      >>> Sent: Monday, December 31, 2007 5:36 PM
      >>> Subject: [ccd-newastro] focusing dslr
      >>>
      >>> > Is there a better way to focus the canon xti than through the view
      >>> > finder, any way to send image to computer possibly?
      >>> >
      >>> >
      >>> >
      >>> > Yahoo! Groups Links
      >>> >
      >>> >
      >>> >
      >>> >
      >>> >
      >>> >
      >>> > --
      >>> > No virus found in this incoming message.
      >>> > Checked by AVG Free Edition.
      >>> > Version: 7.5.516 / Virus Database: 269.17.13/1204 - Release Date:
      >>> > 12/31/2007 12:20 PM
      >>> >
      >>> >
      >>>
      >>>
      >>>
      >>>
      >>>
      >>>
      >>> [Non-text portions of this message have been removed]
      >>>
      >>>
      >>>
      >>> Yahoo! Groups Links
      >>>
      >>>
      >>>
      >>
      >> Yahoo! Groups Links
      >>
      >>
      >>
      >>
      >>
      >>
      >> --
      >> No virus found in this incoming message.
      >> Checked by AVG.
      >> Version: 7.5.516 / Virus Database: 269.17.13/1205 - Release Date:
      >> 12/31/2007 3:32 PM
      >>
      >>
      >
      >
      >
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