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Thread: I broke my finder scope....

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    Default Re: I broke my finder scope....



    Quote Originally Posted by yobbo89 View Post
    shortybarlow, i don't think your image got uploaded, you'll have to use a 3rd party site to upload an image
    OK thanks. I can see it, but I know they sometimes don't render for everyone. I'm running Chrome 71.0.3578.98 (Official Build) (64-bit) on Ubuntu Xenial Xerus LTS (Lenovo G500) at the moment.
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    Default Re: I broke my finder scope....

    Quote Originally Posted by Larry Bradt View Post
    Thanks!

    I took it apart and there doesn't seem to be any way to adjust the focus. I can loosen the objective and possibly achieve focus but there is no way to jock it down.

    And yes. It is 9 X 50.

    Thanks again!
    that's strange, so it doesn't look like this ? a front lens housing with a lock ring on the tube ?, does it at least have a whole front assembly like in the image that holds the lens, maybe it's missing the lock ring ?


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    Default Re: I broke my finder scope....

    Quote Originally Posted by yobbo89 View Post
    that's strange, so it doesn't look like this ? a front lens housing with a lock ring on the tube ?, does it at least have a whole front assembly like in the image that holds the lens, maybe it's missing the lock ring ?
    Yes. It looks like what you're holding. The lens is held against a stop inside there by a lock ring (no adjustment). The part you're holding screws onto the threaded housing until it stops (no external locking ring).
    Maybe there is supposed to be a ring there? Maybe it's not supposed to be screwed on all the way and that's why it was out of focus? I don't suppose the lock ring is sold separately?
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    Default Re: I broke my finder scope....

    ok,in the separate piece i'm holding in the image that houses the lense, that front lens assembly is what you use to focus with, you screw that on the viewfinder tube in the foreground adjust it that way, since it seems like you're missing the main lock ring, you maybe be able to buy another one or you could use plumbing tape this will thicken up the gaps in the threads and stop the lens from unwinding from vibrations while being used.
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    Default Re: I broke my finder scope....

    Quote Originally Posted by yobbo89 View Post
    ok,in the separate piece i'm holding in the image that houses the lense, that front lens assembly is what you use to focus with, you screw that on the viewfinder tube in the foreground adjust it that way, since it seems like you're missing the main lock ring, you maybe be able to buy another one or you could use plumbing tape this will thicken up the gaps in the threads and stop the lens from unwinding from vibrations while being used.
    Thanks!

    I just took the locking ring from the original straight through finder and it fits perfect!
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    Default Re: I broke my finder scope....

    I looked at the Orion RACI and the Celestron RACI and found that the Celestron RACI was a much better built one and is much cheaper. I use the Celestron RACI on my xt8
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    Default Re: I broke my finder scope....

    Quote Originally Posted by Wire View Post
    I looked at the Orion RACI and the Celestron RACI and found that the Celestron RACI was a much better built one and is much cheaper. I use the Celestron RACI on my xt8
    Good to know just in case I can't fix this one.
    Scope: SkyWatcher 10" GoTo Dob
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    Default Re: I broke my finder scope....

    Quote Originally Posted by Wire View Post
    I looked at the Orion RACI and the Celestron RACI and found that the Celestron RACI was a much better built one and is much cheaper. I use the Celestron RACI on my xt8
    I have two Sky-Watcher 9x50 RACI's and an Orion 9x50 RACI. The Orion is a few years old. The first Sky-Watcher isn't much newer. Apart from the bracket colour they are virtually identical. The second Sky-Watcher RACI is about two years old. I also have a Celestron illuminated 9x50 RACI for my SCT (with an SCT style bracket).

    I'm pretty sure these all come out of the same factory, or at least the individual parts are sourced from the same places. The actual OTA's of the finders themselves, the Amici prisms, and diagonal housings are identical. The prisms are very probably Synta and all have identical focal planes. They are noticeably different to the focal plane of GSO 1.25" Amici prisms used on GSO diagonals and GSO RACI's. Only the brackets are different colours. The only real difference that I can detect on all four finder OTA's is the silk screen decal denoting the distributor name (Orion, SW & Celestron).

    AFAIK Orion don't manufacture anything and primarily source from Suzhou Synta Optical Technology Co., Ltd (Synta Technology Corporation of Taiwan). This is why Orion retail prices are usually higher. I believe Sky-Watcher is Synta's own marketing name.

    The only other slight difference is that the Orion and the second Sky-Watcher RACI's have an 'x' shaped reticule rather than a '+' shaped reticule. The older Sky-Watcher has an '+' reticule more like a conventional gun sight cross-hair.

    I have discovered that the 'X' reticule can be rotated into the '+' position after a very small rubber band has been placed around the top of the plastic thread on the finder eyepiece. This acts as a type of shim or washer.

    Oddly, in use I've started to realise that the 'X' reticule makes locating objects slightly easier. When scanning horizontally and vertically for a target the 'X' cross-hair doesn't obstruct the object you are searching for so much.

    The irony is that I've stopped using RACI's on my refractors; preferring 2" eyepieces with long focal length EP's combined with reflex sights instead lol.
    Last edited by Shorty Barlow; 01-07-2019 at 12:46 PM.
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    Default Re: I broke my finder scope....

    Quote Originally Posted by Shorty Barlow View Post
    ...

    The irony is that I've stopped using RACI's on my refractors; preferring 2" eyepieces with long focal length EP's combined with reflex sights instead lol.
    Me too!

    It's not irony, we are the iron men, ha, ha.
    The Wild ultrawide, see the attached pic, has received its own mirror diagonal to the X-Mas,
    so I just swap the diagonals, as soon as the weather and the observing conditions allow,

    JG
    Attached Images Attached Images
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    Default Re: I broke my finder scope....

    Quote Originally Posted by j.gardavsky View Post
    Me too!

    It's not irony, we are the iron men, ha, ha.
    https://www.youtube.com/watch?v=5s7_WbiR79E

    Quote Originally Posted by j.gardavsky View Post
    The Wild ultrawide, see the attached pic, has received its own mirror diagonal to the X-Mas,
    so I just swap the diagonals, as soon as the weather and the observing conditions allow,

    JG
    That's a nice ultrawide JG. It looks bloody expensive though lol.

    For me it's a matter of weight and balance. Once I stopped using the 9x50 RACI with scopes on the AZ5 mount/tripod I realised I could use the ST102 and others on it with just a reflex sight. The ST102 at f/4.9 with a 31mm or 36mm Baader Aspheric and a 2" diagonal basically becomes a huge finder scope! The same applies to the ED72. The modified ST80 was a bit back heavy on the AZ5 for 2" accessories.
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