Incredible effect of focusing collimator block on sharpness & visibllity spectral lines Sol’Ex 5/6/2024
Slight focusing movements only required – amazing effect!
Andy
astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)
Astronomy observatory in Staffordshire, England.
astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)
Astronomy observatory in Staffordshire, England.