ESATTO 2" EXTENSION TUBE M56 15mm small case This system however may produce

This system however may produce a poor guiding performance due to mechanical errors in gears such as periodic error

AZ2000 HPS Mount –  with precision absolute axis-encoders

A heater can prevent this problem

UV transmission

The red glass ERFs will not pass Sodium

ESATTO 2" EXTENSION TUBE M56 15mm small case This system however may produceThe M56 15mm extension tube can be directly threaded to the ESATTO 2" draw tube in order to attach cameras and accessories further away from the ESATTO robotic microfocuser. This is particularly useful for refractors which usually have long travel focusers. This M56 extension tube has 15mm thickness, is made of anodized aluminium, and has a M56 female on the camera side for connecting any of the ESATTO 2" camera adapters. Note: This is not compatible