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Thread: Orion XT8-Plus, one downside (finder)

  1. #1
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    Default Orion XT8-Plus, one downside (finder)



    I've recently bought this scope for me and for my sun to enjoy the wonders of astronomy, as I already told at the intro forum,

    the overall quality of these dobsonian is very good, great image and stability.

    For astrophotgraphy, it's ok, but forget connecting your dslr using prime focus, you wont reach focus.
    If I detach all the accessories from the focuser and hold the camera with my hands (D3400), I've almost reach good focus. Maybe with a low profile focuser I could reach
    focus with the acessories connected.

    As far using the led finder Ex finder2, its ok to find planets and bright objects of the skies.

    For finding objects beyond mag +6, nebulas, messiers, etc... it's very very hard, for me, as beginner, it's almost impossible,
    last night I was trying to find M51, near at the tail of Ursa Major, and it took me more than one hour before i gave up.

    I now really considering to buy a new finder scope, 9x50 for example.

    I'm opening for advice for a good overall quality finder, scope otherwise I'll have numerous headaches in the future...

    regards,
    kingclinton and Brodavid1953 like this.

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    Default Re: Orion XT8-Plus, one downside (finder)

    I have the Orin Xt10 and it came with the 9x50 Finder scope. I agree that finding many objects with the finder can be difficult.
    You need to buy a Telrad Finder. Has no magnification but a red bullseye that you center on your starting star, or object.
    You then calibrate your RACI or other finder to this; and then your main scope. Very easy, very fast.
    You can literally locate your object (visual star/planet) in about 5 seconds.
    John...... Listentothestars.net
    Scopes: ES AR152 Achro, SW 80mm ED APO/SW NEQ6 Pro Mount, Orion XT10i Dobs
    Cameras: ASI1600mm-c, ASI120mc (guide), Canon T2i (550D) DSLR
    Filters: Astrodon Ha 5nm, ZWO LRGB, LPS D-1,
    EP's: ES 2" 82* 18mm, 24mm & 30mm, ES 8.8mm, 11mm.
    BINS: Garrett 12x60, Nikon 9x25
    Processing: SGP, BYEOS, DSS, As!2, Reg6, Star Tools, PS, PHD2, Stellarium, CdC, PIPP

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    Don Alvarez's Avatar
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    Default Re: Orion XT8-Plus, one downside (finder)

    Quote Originally Posted by astroraul View Post
    For astrophotgraphy, it's ok, but forget connecting your dslr using prime focus, you wont reach focus.
    If I detach all the accessories from the focuser and hold the camera with my hands (D3400), I've almost reach good focus. Maybe with a low profile focuser I could reach
    focus with the acessories connected.
    I can get prime focus in my 10" Skyline using a Sony DSLR. Stumbled on it by accident, but I use a 2" to 1.25" adapter in the focuser, and a Celestron Omni 2x Barlow, and I can get it to focus. Without the barlow it's impossible. I have some decent pictures of the moon, I'd exhibit them as proof, but they are on my PC at home.
    Telescopes: 10" SkyLine Dobsonian, Celestron Nextar GT90, Meade Infinity 80
    EP: The Five Fingers of Doom: 5.5mm, 8.8mm, 14mm, 20mm, 24mm Meade 5000 UWA's
    26mm, 32mm, 40mm Meade 4000 Plossls, 30mm, 20mm GSO Superview, Orion Expanse, Various others.
    Binocs: 15x70 Celestron Skymaster, 10x50 Levenhuk Karma Pro, 10x42 Bushnell, 8x42 Sans & Streiffe

    "The heavens themselves, the planets, and this center observe degree, priority, and place,
    Insisture, course, proportion, season, form, office, and custom, in all line of order.”


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    Default Re: Orion XT8-Plus, one downside (finder)

    Here we go. Pulled em off my FB page. My focus probably isn't the best, but I realize I'm using far less than ideal equipment, including the camera:

    FB_IMG_1496341118884[1].jpgFB_IMG_1496341132697[1].jpgFB_IMG_1496341140297[1].jpgFB_IMG_1496341161989.jpgFB_IMG_1496341146373.jpg
    Brodavid1953 likes this.
    Telescopes: 10" SkyLine Dobsonian, Celestron Nextar GT90, Meade Infinity 80
    EP: The Five Fingers of Doom: 5.5mm, 8.8mm, 14mm, 20mm, 24mm Meade 5000 UWA's
    26mm, 32mm, 40mm Meade 4000 Plossls, 30mm, 20mm GSO Superview, Orion Expanse, Various others.
    Binocs: 15x70 Celestron Skymaster, 10x50 Levenhuk Karma Pro, 10x42 Bushnell, 8x42 Sans & Streiffe

    "The heavens themselves, the planets, and this center observe degree, priority, and place,
    Insisture, course, proportion, season, form, office, and custom, in all line of order.”


  5. The Following User Says Thank You to Don Alvarez For This Useful Post:

    Brodavid1953 (09-14-2017)

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    Default Re: Orion XT8-Plus, one downside (finder)

    When you say that the finder is ok for finding planets and bright objects, do you mean that the object is always in the eyepiece? Or do you need to move the scope around to locate the target?

    Many dob users have both a red dot finder and a finderscope, usually around 9x50. This is usually a right angled finderscope, for the avoidance of cricked necks.

    The red dot finder will get you in the general area, while the finder scope will often allow you to see the object, if bright enough, or at least see the stars in the area, thus allowing you to pinpoint your target

    The more you practice, the quicker you will become at finding objects, even those you cannot see with the naked eye or in the finderscope.
    Stevie

    Orion xt10i
    Nexstar 6se
    Tal 100r
    Bresser AR127L

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    Default Re: Orion XT8-Plus, one downside (finder)

    Hello Raul, welcome to the forum! The Orion 9x50 RACI is an excellent finder, the right angle view will keep your neck from breaking. From my light-polluted sky, it shows me most every star in my Taki Mag 8.5 star atlas. This makes it very useful for star-hopping. Unless you have extremely dark skies, you probably do not need the illuminated version. Some people buy a dual finder bracket, so they can use both the red-dot finder and the 9x50.

    Others like Telrads, but you might want to try it out first because it's basically similar to your red-dot finder in concept. If you don't like the red-dot, you may not like the Telrad either.

    Good luck!
    Ray
    ----
    12.5" f/6 custom Dobsonian by New Moon Telescopes, Orion XT8 f/6 "ruby-red" Dobsonian, Celestron 4" f/5 refractor on AZ3 mount. Finders: 13x80 Stellarvue RACI, 9x50 Orion RACI. Eyepieces: 34mm Explore Scientific 68°, 24mm ES 68°, 16mm ES 68°, 10mm TeleVue Delos 72°, 9mm ES 62°, 7mm TeleVue DeLite 62°, 6mm Optica b/c Ortho 40°. Binoculars 12x63 Orion Mini-Giant.

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    Default Re: Orion XT8-Plus, one downside (finder)

    hello.
    My XT8 plus, already comes with a reflex sight (Ez Finder 2), is good to find visible objects, but is hard to point where's the objects is not visible to the human eye.
    In these case i need a finder with magnification. I'm considering install a twin support, so I can use 2 finder at the same time, for example, one for the reflex dot finder, and other
    for magnification.
    regards,

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    Default Re: Orion XT8-Plus, one downside (finder)

    On my XT8 plus and D3400, I can only get prime focus, if i remove all the threaded adapters, included on the camera, and have to hold the camera with my hands,
    it's not practical at all. I even push the primary mirror 4mm forward.
    Maybe with a low profile focuser I can get prime focus with adapters connected, need to take measurements well also, other wise need to push primary mirror a little more foward. But in these case I need longer screws.
    There is a problem pushing the primary mirror, the reflection of primary starts to getting out of secondary.
    So, we must make some compromise...Looks like everybody problem with long dobs.
    regards,

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    Default Re: Orion XT8-Plus, one downside (finder)

    Hello.
    The reflex sight Ez Finder 2, it's ok for visible objects. But invisible objects with the naked eye, we do a lot of "fishing" around.
    I considering to install a twin bracket, to hold both a reflex led finder and right angle finder (9x50). These way I can use both at same time.

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    Default Re: Orion XT8-Plus, one downside (finder)

    Quote Originally Posted by astroraul View Post
    Hello.
    The reflex sight Ez Finder 2, it's ok for visible objects. But invisible objects with the naked eye, we do a lot of "fishing" around.
    I considering to install a twin bracket, to hold both a reflex led finder and right angle finder (9x50). These way I can use both at same time.
    Yes, some people like using both on twin bracket. I'd suggest trying just the 9x50 by itself first, because it's not too hard to point at naked eye objects once you get used to it. Good luck!
    Ray
    ----
    12.5" f/6 custom Dobsonian by New Moon Telescopes, Orion XT8 f/6 "ruby-red" Dobsonian, Celestron 4" f/5 refractor on AZ3 mount. Finders: 13x80 Stellarvue RACI, 9x50 Orion RACI. Eyepieces: 34mm Explore Scientific 68°, 24mm ES 68°, 16mm ES 68°, 10mm TeleVue Delos 72°, 9mm ES 62°, 7mm TeleVue DeLite 62°, 6mm Optica b/c Ortho 40°. Binoculars 12x63 Orion Mini-Giant.

 

 
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