My primary telescope is a Takahashi FSQ-106ED. It's 106mm aperture with a focal length of 530mm, so F5.
One of my first telescopes was this Celestron C9.25. It has an aperture of 235mm at F10. It makes a great addition to the F5 Takahashi.
Baader Vario 60
I actually won this little scope at NEAIC in 2015. It was a guide scope kit put together and given to me by Astro-Physics. The scope has a 61mm aperture at F4.1 (250mm focal length). The optics are by Zeiss, not APO, but very nice all the same. The Astro-Physics made bracket adds to the rigidity.
One of my early scopes. I don't use it currently, it was replaced by the Takahashi. The numbers are close to the Tak; 152mm aperture at F5 for a focal length of 760mm. The reason I replaced it was it constantly needed collimation. The focuser was cheaply made and at F5, focus is very touchy.