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In the reverse Crayford design, the drive-shaft pressure is applied to a bar which "pulls" the drawtube against its supporting bearings as apposed to directly "pushing" the drawtube as seen in the normal Crayford design. This design gives zero image shift and zero backlash.
I have a flat base and a curved base, backing plate and all the mounting hardware.
In very good condition and 6 years old.
The focuser would be $90AU posted. Payment Paypal.
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