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Hi Mamba, Where to start? Firstly, as you age, your pupils dilate less,
letting in less light, about 7mm when young, and by your age, about 5mm or so. As Casstony said, a lower mag could very well help. Also, as Casstony said, your eyes can become cloudy during the early stages of cataract formation without you realising it.
I am in my late 70s, and frequently have trouble spotting E and/or F
in my 8" Newt; only when the seeing is really good, and my eyes are
fully dark adapted can I do it. A couple of years ago I just managed to
see them in a friend's 150mm Mak. Last year I could see them most
times in a 10" Dob, but still had to look hard.
To sum up, I imagine that your scope is fine, and your problem is
probably, like mine, old eyes.[and too much magnification; I think
around 150-175x would be good.]
raymo
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