Ok, from my experience over say 2 months, when i could get out and view ie no rain or clouds, I was able to use the 5mm lv vixen and get satisfactory views out of this eyepiece at least 7 or 8 times out of 10.
There were times with mars and jupiter when the seeing was so bad, than even a 12mm or higher would not show anything on the surface.
Make sure your local guy knows the price of myastroshop etc inc freight as these ep's are extremey good value at the moment ie sub $200
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