QHY9 CCD: Purchased on IIS in 2009. Cooling fan has been replaced more recently (surface rust on exposed cooling fan screws due to condensation in dome). Last listed retail price $3370 but suffice to say this is a vintage model.
QHY CFW2-M-US: Holds 5 x 50mm round unmounted filters. Ultra-slim model. Purchase price $600 in 2017.
Comes with 2" nosepiece and adapters offering M54 male and M42 male thread.
