Hotech ACT-M2 Advanced Collimator
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The ACT-M2 is Hotech's most advanced collimator for Cassegrains and Maksutovs. You can achieve perfect collimation indoors without using a star. David Ho stated that this model has a refined target plate and new circuits. This comes with the 2" reflector mirror (RM2) and a CR123 3v Lithium battery. The ACT-M2 is on back order now, but you can have this one in new condition at a discount. You can order the fine adjustment stage from Hotech.
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