astronomy.network The Website of Lichfield Radio Observatory (LRO)

I am indebted to Minh for advice in attached thread on how to achieve focus – not as easy as

New photos of Sol’Ex aluminium collimator tube and Shelyak collimator lens, ZWO helical focuser and ZWO ASI 174 MM camera

Thanks Minh for this advice! Andy

Correctly focusing Sol’Ex camera tube by taking it out of Sol’Ex, mounting on tripod, and aiming at star at night.

Nice and dark with very few bright pixels – shows no light leak on Sol’Ex – great stuff! Andy

I am finding this very difficult to ascertain – using Christian Buil’s advice, the setting is 2.62mm on the ZWO

Note Christian Buil’s website & Youtube have many more excellent tutorials and information on Sol’Ex – these three are summary

Slight focusing movements only required – amazing effect! Andy