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    Default Hyperion Zoom maintenance?



    The other night, I wanted to use my Hyperion Zoom Mk.III, but found that the zoom ring was siezed. On warming everything up, it turned out not to be seized, but just really stiff. It is behaving like it has cheap Chinese grease in it.

    Has anyone opened one up to clean and re-grease it? I know that opening up eyepieces generally is a can of worms, and a zoom eyepiece would be even worse.

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  2. #2
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    Default

    Hi Keith, It shouldn't be that bad for you. The only difference is that one lens is moved. Just keep track of the parts as you take it apart and put them back in the same way. Flipping a lens is the same problem in either type.

    Sometimes a metal locking ring is used that could cause problems. The one I'm thinking of uses a spanner wrench to loosen it. If you're lucky, one tube just slides in the other and the lenses stay put in each tube.

    Please understand I'm not familiar with Hyperion's design. I'm talking from experience with what we used to do.

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  4. #3
    Joe Lalumia's Avatar
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    Default

    Don't do it-- this voids any warranty. If the zoom is defective return it for a replacement. There are multiple lens elements inside-- do not disturb them.

    As a point of information -- Televues and Naglers can be returned to the factory for repair..... I don't know about Hyperion??

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    Default

    I was reading some reviews about this a couple of weeks ago and remember coming across a post where a guy was reporting the same problem.

    I believe it was concluded in the thread that the grease used at the factory was more of a room-temperature laboratory type grease. The OP re-greased it himself with some outdoors low-temperature grease and said it works great now.

    Wish I could find the thread for you; it was on a different forum and was burried deep.

    I'd probably head Joe's advice and let warranty cover it though.

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    Default

    One more thought - before taking it apart I would probably stick it in the freezer to test the grease theory. It also could be dissimilar materials binding. I've also seen surfaces that weren't polished properly lap in with use.

    I would cap the lenses to keep them from frosting up and then cycle it a few times using 15 minute increments - 15, 30, 45, ... At some point it would get stiff. Twist it a few times back and forth and cycle again. See if that helped. If it's grease, it won't change.

    The shock from your room to outside in BC this time of year is probably simlar to your freezer. It could also be a matter of stabilizing the temp inside the ep. The freezer test can check that without taking it apart.

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