Quote:
Originally Posted by Zuts
Hi Rod,
I thought the Ethos 13mm hardly ever left your scope and was good for most objects. This may be a dumb question but would there be a great difference between an 8mm Ethos and a barlowed 13mm Ethos.
Paul
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Hi Paul,
Not a dumb question at all, and the difference is not so great between those two options.
A 2x Barlowed 13mm Ethos would give me 384x. An 8mm Ethos unbarlowed would give me 312x.
I use a 9mm Nagler at the moment when the seeing is solid enough to ramp up the magnification from the 13mm Ethos, giving me 278x with a FOV (roughly) of 18 arc minutes. It holds a sharp view perhaps 50% of nights.
The 9mm Nagler suits my purposes very nicely at the moment. I wonder if the 8mm Ethos could be justified, as the FOV would only be about 1.5 arc minutes greater, and as it would come in at a magnification that would be held up perhaps only 1/3 of nights, it may be used too infrequently to justify the large price tag (whatever the price ends up being).
I might hold back on this one and have a borrow of someone else's before purchasing.
I am sure the 8mm Ethos will be a very attractive option for the shorter focal length scopes.