Accessory · 2008–2024 Meade Instruments #933 Erect-Image Prism (ETX80) 1.25" Meade Instruments · #933 Erect-Image Prism (ETX80) 1.25" Key specifications Accessory typeOther About Erect-image prism (1.25") sized for the ETX-80 refractor, providing a right-side-up, correctly-oriented image.