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Thread: New Dob with strange mark on the secondary

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    Bugrist's Avatar
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    Default New Dob with strange mark on the secondary



    Hello and glad to be a sky explorer. It's not new to me but first time buying a telescope!

    I've received my 12" Skywatcher Dob collapsible.
    Can someone tell me is this scratch on the secondary mirror normal like the official Skywatcher distributor is telling me, for adjusting the telescope?
    Sounds strange to me.
    I hope it doesn't affect the image and have peace of mind...
    Thank you and greetings from Switzerland.
    Attached Images Attached Images

  2. #2
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    Default Re: New Dob with strange mark on the secondary

    I cannot really see it due to the size of the screen I am looking at but if it is the mark in the center of the secondary you probably will not see it when viewing.
    Have you tried viewing with the scope yet?

    Welcome to the forums, enjoy the scope
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    Default Re: New Dob with strange mark on the secondary

    Not normal Bugrist!
    The distributor might be confused thinking you are talking of the collimating circle that is probably in the center of the primary mirror.
    It should not noticeably affect the image but a new scope certainly should not have this sort of defect.
    It's up to you if you want to return it.
    And most importantly WELCOME TO THIS FORUM!
    Which canton are you from?
    upfyrman likes this.
    CR 6 150 mm f8 refractor . AVX mount. 80mm guide scope with Nexguide. Canon EOS rebel 3 Ti DSLR. Canon Rebel XS DIY modified. I- Optron skytracker. Sky Watcher 8 inch collapsible Dob. 30 mm, 25 mm ,20 mm, 15 mm, 10 mm ,8.8 mm EPS plus plus plus. Cometron 12 x 70 binos plus a couple of 6X42 birders. Sky Watcher PRO ED 80 mm. UHC/LPR, OIII, UV/IR cut filters . Flip mirror. 5 mW green Laser pointer. Telrad(not used!). Lots of hope. Lousy skies.

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    Default Re: New Dob with strange mark on the secondary

    That will absolutely not impact the views. Some people will center mark their secondaries for collimation purposes by making a very small dot using a black marker. That doesn't show up during observing either. So enjoy the scope with no worries.
    Alan || My DSO Blog:
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    Default Re: New Dob with strange mark on the secondary

    Welcome to the forums! As Alan mentioned, you are likely good to go.
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    Default Re: New Dob with strange mark on the secondary

    Yea its some minor scratches / pits in the secondary. You will never see them.
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    Default Re: New Dob with strange mark on the secondary

    OMG you are so nice.
    I am very pleased and relieved. I have 120 stairs steps from the house to the road.
    Goldstar, I am in canton Ticino. Fairly good skies, much luckier here than in the north although nothing like Arizona or the likes.
    Would be nice to see central USA, but my dream would be seeing the southern sky once!

    I think I will save myself the hassle to have the scope replaced, and even getting a new mirror maybe it wouldn't be easy to mount it myself right?

    I've quickly learned to maneuver my other Orion XT8 Dob a month ago and quickly understood that to seriously see you need a bit more.
    More than 10 years ago among three friends we were partying sometimes with a heavy Meade, with music and green substances, in Epic Mode.
    Today in the 40ties the passion (and some freetime) returned.

    Have not had a good seeing these days and was exausted from long studying many days about which scope to buy etc, but a brief observation of Andromeda with the 12" was awesome.
    Looking forward to go far, probably this weekend with the old friends again after such a long time!
    upfyrman and OleCuss like this.

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    Default Re: New Dob with strange mark on the secondary

    One more photo to submit to you expert guys...not sure anymore to keep it and wondering if a DIY replacement would be easy if the dealer will offer a mirror.
    Attached Images Attached Images

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    Default Re: New Dob with strange mark on the secondary

    Like the others have said, probably won’t be noticeable while observing, but, it’s a new scope, and that’s not something you really should have to “put up with” with a new scope. I’d call the dealer and see what they can do to make it right.

    A new car with scratches on the hood...
    upfyrman and ProfEclipse like this.
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    Default Re: New Dob with strange mark on the secondary

    I agree with Bryan - the dealer should make you whole, and take the risk involved in swapping out the part. You shouldn't be on the hook because you dropped a screwdriver on the primary while replacing the scratched secondary.

    On the other hand, you won't notice it in use, so it is up to you whether you are satisfied or not. Enjoy the scope - and welcome!

    Bob
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