Erecting Lenses / Terrestial Lenses
If image inversion without any angle is wished, erecting lenses are the right choice. They are simply integrated in the light path.
Provides correct up/down and left/right orientation with Newtonian reflector telescopes
Delivery date : 1-4 weeks
Provides correct up/down and left/right orientation with direct vision when using refractors
Delivery date : 1-4 days