OCAL 4 ELECTRONIC COLLIMATOR Spectroheliograph 25" T2 Prism Diagonal is

25" T2 Prism Diagonal is a high quality prism diagonal for observation with 1

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

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

Quality 127mm doublet achromat

OCAL 4 ELECTRONIC COLLIMATOR Spectroheliograph 25" T2 Prism Diagonal isThe 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