An accessory/factory option for Altman 360Q and 3.5Q ERSs, allowing for tool-free lamp alignment (bench focus).
Altman | Easy Focusing Speed Cap for 3.5Q Ellipsoidals | 71-1015
At a cost of around $80, it's value is debatable. See the thread 360Q Speedcaps, History of 360Q?, and 360Q Bench focusing observations for discussion.
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