Steps
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- If possible remove the internal baffle on the main mirror that blocks obliquely incident light (this is possible e.g. on the TSO 203/1624 RC PRO)
- Slightly untighten den locking screws on the backside of the mirror using a 2.5mm Allen key
- Next, switch on the collimator in Newtonian/reflector mode (red LEDs)
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Activate the blue circle in the OCAL App
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Misaligned Primary Mirror
- The blue circle should evenly surround the shaft of the secondary mirror.
- Now you center the blue circle by adjusting the primary mirror using a 3 mm Allen keys on the silver push/pull screws.
- It is recommended that the "B" screw be maintained in its current state, thus maintaining the mirror in its current position and changes in mirror spacing are avoided.
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Well Aligned Primary Mirror
- The result at the end of this second and last step of the collimation should look like this. Collimation is finished and the telescope is ready for the night.
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Finalization
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- Re tighten the locking screws slightly to prevents that the pressure on the cell gets too strong or that the mirror position remains unstable.
- Re-install the internal baffle on the main mirror.
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Next Steps
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3 alternative follow-up steps:
- Step 2: Re-check and correct mirror spacing
- Step 3b: Re-check 2nd mirror collimation using OCAL
- Step 5: Fine Adjustment of the Primary
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