TeleVue 0.040" (1 mm) Long Accessory Tube for 2.4" - TLF-0040 Celestron Telescope Accessories 14 arcsec Tube Length w/

14 arcsec Tube Length w/ Dew Shield: 30

Resolution (Rayleigh): 1

which provide high contrast viewing while minimizing chromatic aberration

but also in parallel with the polar axis

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 14 arcsec Tube Length w/TeleVue 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.