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  1. #1
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    Default Orion Centering Adapter and Antares Twist-lock Adapter



    Great-accessories-to-have time: Still using the brass compression ring on your 2" diagonal's 2"-to-1-1/4" adapter? Consider getting the < $30 Antares Twist-lock Adapter (Orion now sells its own version called the Precision Centering Adapter, which I would have gotten if it came out earlier.)



    So what's the difference between the standard adapter and the twist-lock?


    Left: Standard compression ring adapter; Antares Twist-lock Adapter

    The standard adapter merely pushes at the brass compression ring on one side to lock on the eyepiece barrel, whereas the twist-lock adapter centers the EP barrel by pushing down on the compression ring into a funnel-shaped section of the adapter, thereby making a more uniformly centered grip/lock on the EP in relation to the central axis, as compared to the standard brass compression ring where the EP can be skewed from the axis since the pressure lock is only coming from one side where ever the side screw lock is positioned. The twist-lock seems more secure too because an even pressure is applied all over the sides of the EP barrel and not on one side only.


    Twist-lock adapter disassembled

    It sure is a nice accessory to have!

    Best,

    Hernando
    Last edited by ibase; 01-26-2011 at 06:00 AM.

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  3. #2
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    Default

    Have been looking at the Orion ones Hernando. Great bit of kit by the looks of.

    Clear Skies

    Pete
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    Default

    Yes Pete, it's looking good indeed. Turns out that the Orion has been around for some time with many positive reviews. I wonder if this type of adapter will eventually be made standard by the 2" diagonal manufacturers (or an option at least); having used one, it makes for a more elegant and secure way of locking an EP than the old set screw/brass compression ring, not to mention that it's centered positioning lock mechanism makes the the EP better aligned on axis.

    Best,

    Hernando
    Last edited by ibase; 01-26-2011 at 11:52 AM.

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    Default

    Hernando, now that I have looked at the Orion centering adaptor, I'm curious as to why you would buy that one over the Antares. They seem to be the same adaptor with different graphics. The advantage of the Antares is free shipping.

    Here is a thread I just found as I was writing this when I ventured away to check something:

    Telescope Reviews: Antares Twist-Lock Adapter won't twist
    Celestron 8SE, Feathertouch focuser & SkyScout
    Orion ED80T, AT Voyager Mount
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    Default

    The centering adapter should also help with Dob's collimation.
    Thanks for the simple AP tips Hernando.

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    Antonino Carnevali

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  9. #6
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    Default

    Quote Originally Posted by pedalmasher View Post
    Hernando, now that I have looked at the Orion centering adaptor, I'm curious as to why you would buy that one over the Antares. They seem to be the same adaptor with different graphics. The advantage of the Antares is free shipping.
    After reviewing the matter, I'd go for the Antares instead of Orion (although the Orion initially looked good in terms of branding). Why? I was able to dig up the old version of the Antares twist-lock, the one at the right in the pic below, which has now been improved upon, with the version that I have (the one on the left):


    Left: New Antares Twist-lock; right: old version

    Per Agena website: New, redesigned version. Now with a longer (0.6") compression band that works very well with eyepieces with safety grooves too!

    Examining the image at the Orion website, the pic seems to be similar to the old Antares twist-lock with respect to the compression band which is narrower than the new Antares version. Go for the new Antares adapter.

    P.S. The problem with the link you posted seems to be an isolated one only.

    Best,

    Hernando
    Last edited by ibase; 01-26-2011 at 02:43 PM.

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    Ordered the Antares this morning! WWHB!
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    Quote Originally Posted by carnevali View Post
    The centering adapter should also help with Dob's collimation.
    Thanks for the simple AP tips Hernando.
    Always glad to be of help Tonino, thanks again too for the review of the SV 80mm finder.

    Best,

    Hernando

 

 

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