Jump to content

NLCbanner2024.jpg.2478be509670e60c2d6efd04834b8b47.jpg

dweller25

Members
 View Profile  See their activity

  • Posts

    6,229

  • Joined

  • Last visited

  • Days Won

    5

 Content Type 

Posts posted by dweller25

    TS-Optics 8" f/12 Cassegrain telescope 203/2436 mm OTA

    in Discussions - Scopes / Whole setups

    Posted · Edited by dweller25

    3 hours ago, johninderby said:

    It is a lunar / planetary specialist and should outperfom the 180 and also no worries aboit dew. 🙂

    Snippet of a review I found of the scope.

    ”Jupiter was only 14 degrees above the horizon so atmospheric refraction did hinder, but when seeing calmed down I could see more details than I could have painted. The yellow to yellow-brown color of the equatorial zone also came through clearly in those moments. I can´t remember ever seeing Jupiter like that. That was one of the better Jupiter observations in my more than 45 years of observing.”

    Looks great John and I’m sure it’s going to be a very good scope - but I have to question that review - he/she must have been using some bad scopes when Jupiter was very high in the sky.

    • Like 2

    Telescope recommendations needed please ?

    in Getting Started Equipment Help and Advice

    Posted · Edited by dweller25

    @PhoTenix

    Hello and welcome to SGL.

    Having read through this thread and considering your situation I would point you towards the already mentioned Skywatcher 130mm Dobsonian, as long as you can view from the side of the telescope.....

    https://www.firstlightoptics.com/dobsonians/skywatcher-heritage-130p-flextube.html

    Here’s a review....

    http://telescopes-for-sale.co.uk/reviews/skywatcher-heritage-130p-flextube-dobsonian-telescope-review/

    It is very light and compact, easy to move but will show you the major bands on Jupiter, the great red spot and 4 of Jupiters moons.

    Saturn and it’s rings will also be visible.

    Next year you will be able to catch Mars - some surface detail may be seen along with a polar ice cap.

    The Moon will reveal a lot of detail.

    The Orion nebula and the great Andromeda galaxy will also be visible in this scope.

    And that’s just for starters.....

    It’s within your budget too  - New 🙂

    Also as already mentioned - download Stellarium - a free planetarium.

    “Turn left at Orion” is a very good book that may interest you.

    Good luck with your choices.
     

    • Thanks 1

    Collimation for an 11" SCT.

    in Getting Started Equipment Help and Advice

    Posted

    43 minutes ago, haitch said:

    You can undo the outer ring with the grip on that holds the secondary mirror, take the secondary out then put your finger through the hole to grip the other side to allow you to tighten the secondary holder. Jusat be careful not to drop the secondary - I had a £139 bill and a 12 month wait for a new secondary to arrive from the US! 

    The rings look quite concentric apart from the flat section - are you using a flexible dew shield? They sometimes flop across the aperture which could cause the flat edge.

    Brilliant solution - My only experience is with a C6 which has a much smaller secondary so my hand would not fit through.

    • Like 1

    Collimation for an 11" SCT.

    in Getting Started Equipment Help and Advice

    Posted · Edited by dweller25

    The fastar unit can only be tightened up by taking the corrector off but you need to be VERY careful.

    Hopefully you have a serial number on the fastar which needs to be parallel with the dovetail. 

    If you do that make sure you mark the correctors orientation as it must go back in exactly the same position and make sure any shims holding the correctors edge go back in exactly the same way too.

    I’m assuming something like a tree was in the way when you took that video as the flat edge should not be there ?

    • Like 2

    Blurry looking Jupiter

    in Getting Started Equipment Help and Advice

    Posted

    On 08/09/2019 at 12:56, Ferre said:

    Last week I received my Skywatcher Mak 90/1250 which should provide crisp defined images. I know it's only 90 mm in aperture but what I saw was a blurry unrecognizable patch of light. Jupiter is low on the horizon and these are standard eyepieces plus the fact that the scope hadn't well adapted to the outside temperature. But is it even necessary at this time of the year when the outside temperature is approx. the same as the inside temperature ? Or are the standard eyepieces that bad ? Or does the scope needs a collimation (which I strongly doubt because a brand new Mak shouldn't need that ?). Is there a big difference between standard eyepieces and let's say a Super Plössl ?

    You must make sure the Mak is very well cooled or the images will be poor.

    Once cooled do check collimation and for best results adjust if required.

    Even with a perfectly cooled and collimated scope Jupiter and Saturn are very low at the moment so will not show much detail.

    Mars is back next year and will be quite high......

×
×
  • 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.