OCAL 4 ELECTRONIC COLLIMATOR Spectroheliograph Horsehead Nebula by Wolfgang Promper

Horsehead Nebula by Wolfgang Promper using Moravian C3-61000 and 600mm RC at f/4

Medium flat field

The same model can be used in order to obtain the maximum tracking accuracy

Spot diagram of Takahashi TOA-150B with TOA-645 field flattener

It can be directly controlled by EAGLE or any Windows computer with dedicated control software or ASCOM drivers

OCAL 4 ELECTRONIC COLLIMATOR Spectroheliograph Horsehead Nebula by Wolfgang PromperThe OCAL 4 Electronic Collimator is a revolutionary new device for collimating reflecting telescopes with the aid of powerful and easy to use software. With the aid of precise calibration guides, the OCAL makes the daunting task of collimation a breeze. The new 4 version offers some enhancements of the predecessor while retaining its the core stability. With an aperture slightly reduced, the 4. 0 version brings several significant advantages. Superior