Pentax 75 SDHF for sale $1300/-
Focal length : 500 mm
Diameter: 75mm
f6.7
Built in field flattener
2.2 kg
A vintage no longer in production scope designed for astrophotography . OTA with clamshell only and third party adapter to put in 2 inch accessories.
can google for reviews: here is one : https://www.cloudynights.com/articles/c ... ctor-r1129
PM contact for photos.