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Old 01-06-2013, 04:15 PM
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Allan
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Allan is offline
 
Join Date: Feb 2013
Location: Newcastle
Posts: 937
A funny thing happened at Bintel today. I tried parting ways with a decent chunk of money, and they wouldn't take it. In their opinion the 31 Nagler and 21 Ethos were too much like similiar eyepieces, and they thought I would be much better off with the 17 Ethos.

With a TV Paracorr, the 21E will give 80x and 3.8 exit pupil. The 17E will give 101x and 3.0 exit pupil. What I already have in the 31N gives 55x and 5.5 pupil, and the 13E gives 132x and 2.3 pupil.

So in light of this I have to decide which of the 21E and 17E to get to fill the gap. It still looks to me that the 21E sits better in the middle, but I'm not sure now. Anyway, it was all too hard today, so I bought neither.

However I did pick up an 8 Delos, just in time for the rain headed this way tonight! If they are as good as everyone says, I will pick up 1 or 2 more at the shorter end which should then keep me out of trouble for a long time.

So for those of you fortunate to have experience with both the 21E and 17E, what do you think? Cheers
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