The focuser on Bresser refractors can also be adjusted so that it tilts less.

The focuser on Bresser refractors can also be adjusted to reduce tilt.

There are two small grub screws for this purpose, which should be tightened gently until the focuser still moves smoothly.

E.g.: www.teleskop-spezialisten.de/shop/Refraktor/ab-130mm/Bresser-Messier-AR-152S-152-760-Optischer-Tubus-Refraktor::1180.html