What is the primary function of the 3" visual back for ESATTO 3" and ARCO 3"?
This visual back is designed to connect accessories with a standard 3-inch nosepiece, such as diagonals, eyepieces, or certain cameras, to the M81 female thread found on the drawtube of the PrimaLuceLab ESATTO 3" robotic focuser and ARCO 3" robotic rotator.
How does this 3" visual back protect my accessories from scratches?
It features an internal brass compression ring. Unlike simple set screws that dig directly into an accessory's barrel, this soft metal ring tightens evenly around the nosepiece, holding it securely without causing scratches, gouges, or other cosmetic damage.
Can this visual back securely hold a heavy imaging camera on an ESATTO 3" focuser?
Yes. The adapter is equipped with three locking screws arranged around the barrel. This allows you to create a robust, centered, and tilt-free connection that is essential for supporting heavy cameras, filter wheels, and other imaging accessories without flexure.
Which PrimaLuceLab products is this 3" visual back compatible with?
This adapter is specifically designed for PrimaLuceLab products that use an M81-threaded drawtube. This includes:
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ESATTO 3" Robotic Microfocuser
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ARCO 3" Robotic Rotator
I want to use a 3-inch diagonal for visual on my SCT with an ESATTO 3" focuser. Is this the right adapter?
Yes, this is the correct adapter. It will thread onto your ESATTO 3" focuser and provide the standard 3-inch receptacle needed to insert and secure your 3-inch diagonal, allowing you to build a robust visual train for your telescope.
If I'm building an imaging train with an ESATTO 3" and ARCO 3" on my refractor, what role does this visual back play?
In an imaging train, this visual back serves as the final connection point if your camera or off-axis guider has a 3-inch nosepiece. It ensures a solid, coaxial link between your rotator/focuser stack and your imaging sensor, which is critical for maintaining sharp, round stars across the field.