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celestron nexstar 130 slt allen wrench size???

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I've recently purchased the celestron nexstar 130 slt telescope and am in need of adjusting the collimation of the secondary mirror. Does anyone have any idea what size allen wrench I need? I think it might be 2 mm or 2.5 mm but can't seem to find out.

Any help would be great.



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Thank goodness for 5 year old post, this is info I can use -

Unless Celestron changed the allen wrench size since this thread was started.

Hope I wont need them but just in case I'm ordering a set of two

☠️   Dave

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