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  1. #1
    Eric's Avatar
    Eric Guest

    Default PST vs Solarmax 40



    I've been following the other thread. I went and joined the Yahoo PST
    and Coronado groups. I had a look at the images from each group. I
    noticed that the images from the PST are not as crisp as those from the
    Solarmax 40.

    These telescopes have the same aperture so that is not the issue. So
    what IS the issue ? Is it lack of experience with the telescope/camera ?
    Quality of the telescope ? Band-pass of the filter ? Are these images
    indicative of the performance difference between the two telescopes ?

    Eric.


  2. #2
    Brian Tung's Avatar
    Brian Tung Guest

    Default PST vs Solarmax 40

    Eric wrote:

    One definite difference is the bandwidth of the two. The PST is rated
    at 1.0 Angstrom (0.10 nm), whereas the SM 40 (or the MS 40 that uses it)
    is rated at 0.7 Angstrom (0.07 nm). That should make a noticeable
    difference on disc contrast.

    Brian Tung <brian@isi.edu>
    The Astronomy Corner at http://astro.isi.edu/
    Unofficial C5+ Home Page at http://astro.isi.edu/c5plus/
    The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/
    My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.txt

  3. #3
    Kruger Kid's Avatar
    Kruger Kid Guest

    Default PST vs Solarmax 40

    On Wed, 25 Aug 2004 04:14:07 +0000 (UTC), brian@isi.edu (Brian Tung)
    wrote:


    And indeed it does!

    Cheers.

    Kruger
    A SM-40 owner


  4. #4
    Paul Lawler's Avatar
    Paul Lawler Guest

    Default PST vs Solarmax 40

    Kruger Kid <kkofvirgo@yahoo.com> wrote in
    news:ss8oi0tm7ormj00p7empcbrh9m9hnviu9k@4ax.com:


    Yes... but I should note that it is also a $1,000 (plus a small refractor)
    difference. <g>

  5. #5
    Mark Rosengarten's Avatar
    Mark Rosengarten Guest

    Default PST vs Solarmax 40

    >Yes... but I should note that it is also a $1,000 (plus a small refractor)

    Plus, if you already have an SM40, the stacked results are phenomenal. That's
    another area the PST really shines. Adding an SM40 to the end does not require
    you to send the whole shebang into Coronado for tweaking, it just gives pretty
    bright, contrasty and balanced views.

    Mark
    The Catman
    isobutane@aol.com
    www.geocities.com/mark_rosengarten
    Owner/Coordinator of the Neko Ultraportable Solar Observatory
    Fun WITH The Sun for Everyone!

  6. #6
    Martin Frey's Avatar
    Martin Frey Guest

    Default PST vs Solarmax 40

    Eric <ekfuller@telus.net> wrote:


    There's not a lot of in-focus travel on the PST so I think you are
    seeing a lot images with the camera hand held to the eyepiece.

    Plus I don't think us PST owners have yet mastered the major
    processing required to produce images of the quality of, say, Paul
    Hyndman's.

    Visually the PST is very very close to SM40. The arrival of toucam's
    with the chip raised from the motherboard (so it can breach the focus
    point) means that the image quality will soon catch up with the SM40.

    --
    Martin Frey
    http://www.hadastro.org.uk
    N 51 02 E 0 47

  7. #7
    Brian Tung's Avatar
    Brian Tung Guest

    Default PST vs Solarmax 40

    Paul Lawler wrote:

    That's true, but it becomes more attractive if you have a small refractor
    already. It's still debatable that it's worth an extra $600 (it's only
    $900 if you get the BF-10, as I did), but it's at least plausible either
    way. Frankly, I like having better disc detail, but not having seen
    through a PST, I can't really comment on how much better it is.

    Brian Tung <brian@isi.edu>
    The Astronomy Corner at http://astro.isi.edu/
    Unofficial C5+ Home Page at http://astro.isi.edu/c5plus/
    The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/
    My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.txt

  8. #8
    William Hamblen's Avatar
    William Hamblen Guest

    Default PST vs Solarmax 40

    On Wed, 25 Aug 2004 17:09:31 -0500, David Knisely <ka0czc@navix.net>
    wrote:


    I've got a Lumicon 0.1 nm solar H-alpha filter that shows practically
    no details on the solar disk. You see a very strong filament
    occasionally. If the PST shows much detail it means that it has a
    pass band narrower than 0.1 nm.


  9. #9
    Michael McCulloch's Avatar
    Michael McCulloch Guest

    Default PST vs Solarmax 40

    On Wed, 25 Aug 2004 03:51:05 GMT, Eric <ekfuller@telus.net> wrote:


    Look again:

    http://groups.yahoo.com/group/Coronado_PST/message/935

    http://home.nc.rr.com/rschlesser/sun_20040822_proc.jpg

    I'm not arguing the PST is the equal of the Solarmax 40, but please
    understand there is considerable difference in cost. Given the above
    example it is certainly possible to obtain very good results.

    Here are my own personal examples:

    http://gamesforone.com/stars/images/sun8-03-04.jpg

    http://gamesforone.com/stars/images/sun8-06-04.jpg

    http://gamesforone.com/stars/images/sun8-18-04.jpg

    ---
    Michael McCulloch

  10. #10
    David Knisely's Avatar
    David Knisely Guest

    Default PST vs Solarmax 40

    Brian Tung wrote:


    The PST is rated at *less* than one angstrom. From comparing it to my 0.7
    Angstrom DayStar T-Scanner, I would have to say that it is definitely
    sub-angstrom in passband width. I saw the SM40 in use at NSP, and its
    performance was fairly comparable to that of the PST which I am reviewing.
    Clear skies to you.
    --
    David W. Knisely KA0CZC@navix.net
    Prairie Astronomy Club: http://www.prairieastronomyclub.org
    Hyde Memorial Observatory: http://www.hydeobservatory.info/

    **********************************************
    * Attend the 11th Annual NEBRASKA STAR PARTY *
    * July 18-23, 2004, Merritt Reservoir *
    * http://www.NebraskaStarParty.org *
    **********************************************




 

 
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