Jump to content

NLCbanner2024.jpg.2478be509670e60c2d6efd04834b8b47.jpg

johninderby

Beyond the Event Horizon
  • Posts

    15,408
  • Joined

  • Last visited

  • Days Won

    78

Posts posted by johninderby

  1. It’s curious that Celestron SCTs are seen as much more desireable than Meade although the lower weight does make the Celestrons easier to mount which is part of it. The later Meades are quite good but seem to have slipped off the radar of potential buyers. Nowadays it seems like SCT = Celestron. 

    Where did it all go wrong for Meade? 🤔

     

  2. Have been giving this a bit more thought. 🤔

    I think that yes the imaging side is growing quite a bit but as alluded to in some of the earlier posts it’s the overall hobby that is growing rather than the number of visual observers decreasing.

    Also it’s not surprising that thee are more posts re: imaging as first of all they have images to post whereas viusal observers simply don’t bother to post their observing experiences as often. Also imagers need more help than visual in getting things working so more requests for help and advise and sharing of experiences.

    Things may differ in the US compared to the UK and EU but I wouldn’t imagine there would be a huge difference.

    Conclusio:  The astronomy hobby has never been healthier. 👍🏻

    • Like 5
  3. Worth using the Televue eyepiece calculator which will give you the fov and mag etc for various Televue eyepieces but you can find cheaper eyepieces that are about the same as the Televue ones.

    http://www.televue.com/engine/TV3b_page.asp?id=212&plain=TRUE

    Focal Length:  900.0mm
    Aperture:  70.0mm
    Focal Ratio: 12.9 
    Include 2-inch data: False
    Table corrected for Paracorr: False
    List only DIOPTRX eyepieces: False
    Max recommended mag. for aperture: 165x

     

    Design Focal
    Length
    (mm)
    Apparent
    Field
    (°)
    Eye
    Rel.
    (mm)
    Barrel
    Size
    Mag.
    (x)
    Exit
    Pupil
    (mm)
    True
    Field
    (°)
    True
    Field
    @
    1000
    yards
    (feet)
    Mag.
    w/2x
    Barlow
    (2x)
    Mag.
    w/2x
    Big Barlow
    or
    Power-
    mate
    (2x)
    Mag.
    w/2.5x
    Power-
    mate
    (2.5x)
    Mag.
    w/3x
    Barlow
    (3x)
    Mag.
    w/4x
    Power-
    mate
    (4x)
    Mag.
    w/5x
    Power-
    mate
    (5x)
     Panoptic   41   68   27   2"   --   --   --   --   --   --   --   --   --   -- 
     Plössl   55   50   38   2"   --   --   --   --   --   --   --   --   --   -- 
     Nagler 5   31   82   19   2"   --   --   --   --   --   --   --   --   --   -- 
     Panoptic   35   68   24   2"   --   --   --   --   --   --   --   --   --   -- 
     Ethos   21   100   15   2"   --   --   --   --   --   --   --   --   --   -- 
     Nagler 4   22   82   19   2"   --   --   --   --   --   --   --   --   --   -- 
     Panoptic   27   68   19   2"   --   --   --   --   --   --   --   --   --   -- 
     Ethos   17   100   15   2"   --   --   --   --   --   --   --   --   --   -- 
     Panoptic   24   68   15   1¼"   37.5   1.9   1.7   90.0   75.0   --   93.8   112.5   --   187.5 
     Plössl   32   50   22   1¼"   28.1   2.5   1.7   90.0   56.3   --   70.3   84.4   --   140.6 
     Plössl   40   43   28   1¼"   22.5   3.1   1.7   90.0   45.0   --   56.3   67.5   --   112.5 
     Nagler 4   17   82   17   2"   --   --   --   --   --   --   --   --   --   -- 
     Ethos   13   100   15   2" & 1¼"   69.2   1.0   1.4   74.3   138.5   --   173.1   207.7   --   346.2 
     Nagler 5   16   82   10   1¼"   56.3   1.2   1.4   73.7   112.5   --   140.6   168.8   --   281.3 
     Panoptic   19   68   13   1¼"   47.4   1.5   1.4   71.0   94.7   --   118.4   142.1   --   236.8 
     Delos   17.3   72   20   1¼"   52.0   1.3   1.3   70.7   104.0   --   130.1   156.1   --   260.1 
     Plössl   25   50   17   1¼"   36.0   1.9   1.3   70.7   72.0   --   90.0   108.0   --   180.0 
     DeLite   18.2   62   20   1¼"   49.5   1.4   1.2   63.7   98.9   --   123.6   148.4   --   247.3 
     Ethos   10   100   15   2" & 1¼"   90.0   0.78   1.1   59.0   180.0   --   225.0   270.0   --   450.0 
     Nagler 6   13   82   12   1¼"   69.2   1.0   1.1   58.7   138.5   --   173.1   207.7   --   346.2 
     Delos   14   72   20   1¼"   64.3   1.1   1.1   57.7   128.6   --   160.7   192.9   --   321.4 
     Plössl   20   50   14   1¼"   45.0   1.6   1.1   57.0   90.0   --   112.5   135.0   --   225.0 
     DeLite   15   62   20   1¼"   60.0   1.2   1.0   53.3   120.0   --   150.0   180.0   --   300.0 
     Delos   12   72   20   1¼"   75.0   0.93   0.96   50.0   150.0   --   187.5   225.0   --   375.0 
     Ethos   8   100   15   2" & 1¼"   112.5   0.62   0.88   46.3   225.0   --   281.3   337.5   --   562.5 
     DeLite   13   62   20   1¼"   69.2   1.0   0.88   46.0   138.5   --   173.1   207.7   --   346.2 
     Delos   10   72   20   1¼"   90.0   0.78   0.81   42.3   180.0   --   225.0   270.0   --   450.0 
     Plössl   15   50   10   1¼"   60.0   1.2   0.80   42.0   120.0   --   150.0   180.0   --   300.0 
     Nagler 6   9   82   12   1¼"   100.0   0.70   0.79   41.3   200.0   --   250.0   300.0   --   500.0 
     DeLite   11   62   20   1¼"   81.8   0.86   0.74   39.0   163.6   --   204.5   245.5   --   409.1 
     Ethos   6   100   15   2" & 1¼"   150.0   0.47   0.66   34.7   300.0   --   375.0   450.0   --   750.0 
     Delos   8   72   20   1¼"   112.5   0.62   0.63   33.0   225.0   --   281.3   337.5   --   562.5 
     Nagler 6   7   82   12   1¼"   128.6   0.54   0.62   32.3   257.1   --   321.4   385.7   --   642.9 
     DeLite   9   62   20   1¼"   100.0   0.70   0.61   32.0   200.0   --   250.0   300.0   --   500.0 
     Plössl   11   50   8   1¼"   81.8   0.86   0.58   30.3   163.6   --   204.5   245.5   --   409.1 
     Ethos SX   4.7   110   15   2" & 1¼"   191.5   0.37*   0.57   29.8   383.0   --   478.7   574.5   --   957.4 
     Delos   6   72   20   1¼"   150.0   0.47   0.48   25.3   300.0   --   375.0   450.0   --   750.0 
     DeLite   7   62   20   1¼"   128.6   0.54   0.48   25.0   257.1   --   321.4   385.7   --   642.9 
     Ethos SX   3.7   110   15   2" & 1¼"   243.2   0.29*   0.45   23.5   486.5   --   608.1   729.7   --   1,216.2 
     Nagler 6   5   82   12   1¼"   180.0   0.39*   0.45   23.3   360.0   --   450.0   540.0   --   900.0 
     Plössl   8   50   6   1¼"   112.5   0.62   0.41   21.7   225.0   --   281.3   337.5   --   562.5 
     Delos   4.5   72   20   1¼"   200.0   0.35*   0.36   18.7   400.0   --   500.0   600.0   --   1,000.0 
     DeLite   5   62   20   1¼"   180.0   0.39*   0.34   17.7   360.0   --   450.0   540.0   --   900.0 
     Nagler Zoom   6 - 3   50   10   1¼"   150.0 - 300.0   0.47 - 0.23*   0.32 - 0.17   17.0 - 8.7   300.0 - 600.0   --   375.0 - 750.0   450.0 - 900.0   --   750.0 - 1,500.0 
     Nagler 6   3.5   82   12   1¼"   257.1   0.27*   0.31   16.0   514.3   --   642.9   771.4   --   1,285.7 
     Delos   3.5   72   20   1¼"   257.1   0.27*   0.28   14.7   514.3   --   642.9   771.4   --   1,285.7 
     DeLite   4   62   20   1¼"   225.0   0.31*   0.27   14.3   450.0   --   562.5   675.0   --   1,125.0 
     DeLite   3   62   20   1¼"   300.0   0.23*   0.20   10.7   600.0   --   750.0   900.0   --   1,500.0 
    Design Focal
    Length
    (mm)
    Apparent
    Field
    (°)
    Eye
    Rel.
    (mm)
    Barrel
    Size
    Mag.
    (x)
    Exit
    Pupil
    (mm)
    True
    Field
    (°)
    True
    Field
    @
    1000
    yards
    (feet)
    Mag.
    w/2x
    Barlow
    (2x)
    Mag.
    w/2x
    Big Barlow
    or
    Power-
    mate
    (2x)
    Mag.
    w/2.5x
    Power-
    mate
    (2.5x)
    Mag.
    w/3x
    Barlow
    (3x)
    Mag.
    w/4x
    Power-
    mate
    (4x)
    Mag.
    w/5x
    Power-
    mate
    (5x)
     
    • Like 1
  4. 5 minutes ago, John said:

    Perhaps I'll tell the poster on the other forum that he might be mistaken ?

    He is a dealer though so I wondered if his comments were based on sales trends.

    FLO made the comment earlier in the thread that the visual side seemed to be doing OK. 🤔

    Could the dealer be more of an imaging specialist?

  5. I think the main point to come out of this thread is that while imaging has grown it hasn’t been at the expense of visual observers. They are not waning at all. It has increased the total number in this astronomy hobby not taken away from the number going the visual route. 

    • Like 3
  6. Pity you can’t try a few prisims first to see what suits you best in your scope. No two people are the same and while one will say this one is better than anything else the next may say another is the best. Eyeballs differ. 🙂

    Interesting discussion on the matter. There is someone who compared the Zeiss and non Zeiss on a small mak and couldn’t see any difference.

    https://www.cloudynights.com/topic/480944-baader-t2-prism-vs-t2-zeiss-prism-on-planets/

    • Like 1
  7. The Starbase achro refractor is an 80mm f/10 so not very demanding on eyepieces. Probably OK in such a slow scope.

    Think I’ll be passing on these orthos. Bet they are available for half the price under other brand names.

    546BEC6F-DB4D-4342-B1A1-600142CE2667.jpeg

    • Like 1
  8. They aren’t actually Tak eyepieces but are bought in from an outside supplier  Daiichi Optics in Japan. Apparently quite sharp on axis but not so good off axis. Think they are really intended to go with the Starbase achro which again is made for Tak as a “beginners” scope but the Tak name isn’t used on the scope.

    The same eyepices are made for other brands by Daiichi. 

    • Like 1
    • Thanks 1
  9. I wonder how  future developments will change the observation vs imaging discussion. In a few years you’ll be able to buy a completly automated remote observing setup that you just bring home, open up and plonk down in the middle of the lawn and it sets itself up leaving you to go inside turn on your TV and select whatever you want to look at and just press a button to capture images with no technical knowledge or effort needed. 

    Hmmmmmmm 🤔

    • Like 1
  10. Gosky smartphone holder arrived yesterday.

    Wasn’t expensive at all on Amazon but really like it. Such a simple but effective design. A solid clamp to hold the phone and aligning with the camera couldn’t be easier. Centre the lens in the hole in the clamping head on the holder then drop in an eyepiece and twist the clamp lock and ypu’re ready to go. Makes it easy to swap eyepieces as well withput having to readjust.

    Had an expensive Altair smartphone holder and honestly this is far better and easier to use. Identical to the Orion Steadypix but cheaper. There are some similar looking but slightly different super cheap ones on eBay but not sure how good they are.

    6D3C1D56-3E7B-4B19-A07B-0DB1BEDB741C.jpeg

    E4CAC41F-CCA7-4094-BA48-66C96601C012.jpeg

    AD54027B-6E90-45F2-B2E2-814E3817F469.jpeg

    5161DED4-4A89-4A5F-B42C-8BD8DE244115.jpeg

    • Like 4
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.