Collimation with OCAL 4.0
Just to illustrate how important scope collimation is, I seem to find myself writing more about this than about any other subject… But then again, having a properly collimated scope is of prime importance to any astronomer. There are numerous ways to collimate a Newtonian telescope, from a basic “Cheshire” eyepiece to fancy barlowed laser.…
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Samyang F2.0/135mm applied to Astrophotography
Using Samyang 135mm F2.0 lens for astrophotography.
ZWO ASI camera and dew problems, how to fix it?
CMOS camera dew problems how to fix it.
How to make a DIY secondary heater
How to make a DIY secondary mirror heater
How good is the Askar FRA300?
Askar FRA300 for astrophotography
Using a Sigma Art 40mm F1.4 for astrophotography
Sigma Art 40mm F1.4