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John

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Posts posted by John

  1. 50 minutes ago, Philip R said:

    Thank you @John:icon_salut:

    I would like to say; that I find the Explore Scientific CLS filter to be a tad better than the Baader Planetarium Contrast Booster filter. Maybe it's just me! Others may tend to agree or disagree as @John has said.

    The Contrast Booster and CLS filter are quite different to the UHC and O-III filters.

    The CB and CLS are broadband filters. The UHC is a narrowband and the O-III is a line filter. More on these classes of filters here:

    https://www.prairieastronomyclub.org/useful-filters-for-viewing-deep-sky-objects/

    • Like 1
  2. 23 minutes ago, Camalajs525 said:

    Are they applicable to all telescopes?

    The UHC type work better with smaller scopes than the O-III type. The CLS type barely have any effect in my experience. These things only work with nebulae (ie: not galaxies or clusters) and the improvements are subtle rather than startling but the contrast in the nebulosity is improved to some extent.

     

    • Like 2
  3. I did have a Lunt 50 h-alpha scope for a while a year or so back but for me, my interest in observing the Sun did not really take off (probably the quiet Sun didn't help either) so I decided that I had too much tied up in that piece of equipment and sold it.

    I now have a much less expensive Lunt Herschel Wedge which gives me nice white light views when I want them using the scopes that I use for nighttime use.

    I guess if you get the h-alpha bug then the money will seem like a good investment as the solar activity gradually increases.

     

     

  4. I'll add tonights haul to last nights thread.

    12 inch dobsonian again (3rd night in a row !). Got the Supernova SN2020ftl. Looked similar brightness to last night ~mag 14 ?

    New galaxies tonight were:

    Leo:

    NGC 3193, 3190 and 3185 which are 3 of the 4 Leo Quintet in the lions "neck"

    NGC 3605, 3607, 3608, 3626 and 3596 in the rear end of the lion.

    Virgo:

    NGC 4179

    M 49

    NGC 4526 and 4535 (the latter is known as "Copelands Lost Galaxy" and it's a faint surface brightness face on spiral)

    M 87 (no jet, alas)

    NGC 4478 and 4476

    M 58, M 59 and M 60

    NGC 4638

    M89 and M90

    NGC 4550 and 4564

    And finally the "Siamese Twins" galaxies NGC 4567 and 4568 showing their "V" configuration quite nicely I thought at 122x (Ethos 13mm) as they interact together. Photo below by NASA.

    Another fine night and I decided to stop at those two constellations rather than venturing into Coma Berenices tonight. I found the larger scale map of the Virgo / Coma cluster in the Sky & Telescope Pocket Sky Atlas very useful for navigating around this multitude of fuzzies.

    Hope others have enjoyed these clear dark skies as well :icon_biggrin:

    siamese twins galaxy,ngc 4567,ngc4568,interacting galaxies,virgo cluster galaxies

     

    • Like 3
  5. I did look at M87 a while back thie evening but not to for too long I'm afraid. I'm wading through the Virgo galaxy field currently and its easy to get distracted and rather lost !

    There is some LP in the sky currently so not the best for spotting faint jets perhaps ?

     

     

    • Like 1
  6. Very good report Baz, thanks for posting it :icon_biggrin:

    M101 is a tricky blighter as Stu says.

    With a very few exceptions galaxy spotting is about picking out those faint smudges.

    This is my star hop route to Tegmine, in case it is of any use:

     

     

    stellarium-000.png

    • Like 1
  7. The company Antares is / was Canadian. Much of their stuff was imported from Japan or other Asian countries. I agree that the stopped down optics, once they became known about, were off putting.

    Vixen used to make fine F/13 and F/15 achromat refractors. Much less of those around than the more familiar Vixen F/10 / F/11's

    I used to lust after these Vixens (the scopes) which were branded Celestron back in the early 1980's:

    Old Celestron Refractors - Discussions - Scopes / Whole setups ...

     

    • Like 1
    • Thanks 1
  8. Interesting that there are still good quality long focal length achromat refractors being produced.

    These remind me of the Antares "Vixen Spec" achromats which were available a decade or so ago.

    Bresser produced a couple of long achromats a couple of years back (90mm and 102mm) but they used a lot of plastic in these so I;m not sure how good they actually turned out to be ?:

    Reportage_Cieletespace019.jpg

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