Wow, thanks a lot for the nice comments to everybody
My telescope is hosted at Peter Starr's facility,
www.tenbyobservatory.com/, great place to shoot from.
For Greg: this pentax lens is native for the 67 format and I have to say it is a great value for money. What really impresses me is the chromatic correction, better of many socalled APO telescopes out there. Pity it is available with difficulty only on the second hand market.
For Mike: Le stelle sono buchi nel cielo da cui filtra la luce dell'infinito