1) Standard#SC thread, 50mm diameter, present in#Schmidt-Cassegrain Celestron 8" and#9.25" telescopes and in
EdgeHD 8". In order to connect#ESATTO 2" to these telescopes you have to use the#"Adapter ESATTO 2" for
telescopes with SC thread" PL3600209
2) Large# 3,3" SC thread: # 84mm diameter, present in#Schmidt-Cassegrain Celestron 11" and 14" and in the# Ed-
geHD 9.25", 11" and# 14". In order to connect# ESATTO 2" to these telescopes you have to use the# "Adapter
ESATTO 2" for telescopes with large 3.3" SC thread" PL3600212
ESATTO focuser for Schmidt-Cassegrain and EdgeHD: to the left a C8 telescope with SC thread, to the right a Ed-
geHD 9.25" telescope with 3,3" thread.
Then, using one of the various M56 adapters with Stop ring you can directly connect the cameras (or other photo-
graphic accessories) with T2, M48, SC, M54 and M57 thread to ESATTO#2" or you can use the "2" visual back for
ESATTO 2" PL8410001 to connect to ESATTO#any instrument with a 2" nose. The 2" visual back#has the advanta-
ge of being universal, while the M56 adapters with stop rings allow you to directly screw accessories or cameras#to
ESATTO draw tube#(and lock it at a perfect angle thanks to the stop ring) so they are perfect for astrophotography
since they#avoid any flexure.
#
Application example: how to use!ESATTO 2" with!Schmidt-Cassegrain telescopes
When you use ESATTO# as focuser for Schmidt-Cassegrain, you can make a fast# focus by using the telescope's
internal focuser and then achieve perfect focus using ESATTO. This allows you to easily switch between the visual
use (usually with a mirror#diagonal and#eyepieces) and the photographic one (by connecting planetary, DSLR/mir-
rorless cameras or cooled CCD/CMOS cameras to ESATTO) since you will need a lot of focus travel for this#switch.
If you want to use the f/6.3 focal reducer for your Schmidt-Cassegrain telescope, just use the "Adapter from M56 to
SC with stop ring for ESATTO 2" PL3600225 which will allow you to screw the focal reducer directly to ESATTO.
Then, using a standard photo adapter, you can connect your camera to the focal reducer with#the correct backfocus
distance (that#for Celestron f/6.3 focal reducer is 105mm).
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