M90 to M90 Extension Tube 25mm | Dark Clear Skies

M90 to M90 Extension Tube 25mm | Dark Clear SkiesM90 to M90 Extension Tube 25mm The Dark Clear Skies M90 to M90 25mm Extension Tube is a precision machined spacer designed for fine back focus adjustment in astrophotography imaging trains that use large diameter M90 threading. Featuring M901 male threads on both ends, this extension tube is ideal for making smaller spacing corrections when pairing reducers, flatteners, filter systems, and cameras that require accurate optical spacing. The 25mm

Use SmartEye as a standalone digital eyepiece or as a cooled astro-camera via ASCOM Alpaca

1 mm (DC5521)

Integrated Blocking: All unwanted light is blocked across the entire spectral range from UV to IR

is reliably filtered out

GIOTTO’s lighting control provides fine-tuning for precise calibration frames

The non-amp-glow feature ensures clean

Objective Lenses: 70 mm / ED apochromatic

The Benro Polaris has a built-in GPS

The electronic internal components were designed for field use in extended temperature ranges

Built-in overvoltage and overcurrent protection mechanisms keep your Ceres C camera and connected devices safe during operation

60 for Baader-Binoviewer with Zeiss ring dovetail (#2456317)

designed for seamless integration and increased tripod performance