Quote:
Originally Posted by mental4astro
Yes, Jeremy.
This solution follows the conventional thinking around forcing scopes to cool. And while in principle it works, it is not necessarily best practice, but as a selling point it is excellent because this is what people know and expect. It still requires a waiting time and constant monitoring.
Yet the insulation route is totally passive.
Dew formation is a separate matter though. All scopes are susceptible to it, thought needs to go into it, and designed specifically for each scope type, though the principles followed are the same.
As for dealing with dew, one has three options: 1, heating strap around the corrector -not my favourite as you want the scope to cool (slowly or quickly) and then a heat source is re-introduced around an active lens element: 2, rig up a blower system that will evaporate dew, either heated (care needed), or at ambient temp: 3, set up scope at a dew-free location - dew and astro ARE NOT inseparable bed fellows. The dark site location my observing buddies and I use, we are still to experience a night of any dew on our optics in now more than 7 years, a on all types of scopes, Maks included. All about site selection and time into these investigations. Dew-free astro is possible.
One thing I don't want to do is create the impression that I'm saying Maks are the perfect scope. They are not, in the same way no particular scope design is. Maks fill a niche and it is up to the individual to figure out if a Mak satisfies a particular requirement they have. I have some 14 scopes, of these only one Mak, and I still have an SCT as IT fills a niche for me with outreach. And yes Dunk, I do agree with practices being equally important to extract the very best from whatever scope one is using, both photo and visual.
Alex.
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Then why do all Sc and MC scopes not have such vents or insulation