Lomo Astele 133.5mm (5.25") Maksutov Optical Tube.
f/10.13, internal mirror focusing, metal dew shield,
1/4-20 tripod mount and dovetail mount, SCT threads on rear cell,
90 deg mirror diagonal, 25mm plossl eyepiece,
1 1/4" visual back, 8X40 right angle finder and bracket.
Built like a tank and very high quality. Like new condition.
Price is $600. plus shipping.