TeleVue 0.040" (1 mm) Long Accessory Tube for 2.4" - TLF-0040 Celestron Telescope Accessories With the free Celestron SkyPortal

With the free Celestron SkyPortal app for iPhone

as well as opto-mechanical errors or flexure

Celestron is not only changing the way we experience astronomy

Resolution (Rayleigh): 1

making them perfect for the avid birder or hunter

TeleVue 0.040" (1 mm) Long Accessory Tube for 2.4" - TLF-0040 Celestron Telescope Accessories With the free Celestron SkyPortalTeleVue 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.