Quote:I will use a barlow with the laser when adjusting the primary, but I don't think it can help with the tilt and position of the secondary.Something I don't understand is why the laser spot on the primary cannot get within 1 cm of the center spot, when the vertical position of the secondary may only be off by a few mm. A ray trace sketch suggests to me that the 45degree angle of the 2ndary would result in Xmm offset of the laser on the primary whenever the 2ndary vertical position is offset by Xmm.
Quote:Is this a case of the secondary being improperly vertically positioned?
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Quote: behind the big center screw (which can be removed) is a small hex screw
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