TeleVue 0.040" (1 mm) Long Accessory Tube for 2.4" - TLF-0040 40 mm Eyepieces By combining a luminance image

By combining a luminance image taken with the IR-Pass filter

Explore Scientific 52° 40 mm Waterproof

This will keep the diagonal

which allows closer placement of the eyepiece

Cassini'''s Division in the rings of Saturn

TeleVue 0.040" (1 mm) Long Accessory Tube for 2.4" - TLF-0040 40 mm Eyepieces By combining a luminance imageTeleVue 0. 040" (1 mm) Long Accessory Tube for 2. 4" The Tele Vue 0. 040" Length Accessory Tube for 2. 4" adds 0. 040" (1 mm) extension between Imaging System accessories. Extension Tubes are sometimes necessary to position the imaging camera's sensor far enough backwards to match the focal plane location of your scope.