Quote:
Originally Posted by batema
Hi,
I know this question is always asked but last weekend we looked through a NAGLER 15mm???? using a 12 inch skywatcher dob and yes the difference between clarityand our own eyepieces that came with the scope was amazing. We also have a 2.5xteleview barlow. Any suggestions. We looked at Omega C and ir was amazing. We would probably use it to observe deep sky objects but also love showing the school kids the moon and planets.
Mark
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Hi Mark,
I would consider the following in no particular order. They are all excellent eyepieces which will cost you just under $400. You should base your decision on performance criteria that are most important to you like eye relief and FOV. You also need to consider what power the eyepiece will give you barlowed having regard to your prevailing "common" seeing conditions. A 13mm eyepiece is not much good to you if your seeing usually runs out at 180X. Your 2.5X TV Powermate would then be superfluos combined with your new eyepiece.
Best eye relief with generous FOV
14mm Denkmeier
17mm Vixen LVW
13mm Vixen LVW
Best FOV with shorter eye relief
13mm Nagler T6
16mm Nagler T5
Of all the eyepieces I have listed I rate the 14mm Denkmeier as the best performer in terms of "optical" performance. It has excellent eye relief at 20mm but the FOV is only 65 degrees. It is sharper than the others with better contrast and light throughput. In your 2.5X TV Powermate it would give 267X which "may" be a bit much for regular use barlowed. If long eye relief is not important to you and you wish to maximise the FOV I would go for the 16mm Nagler T5. Combined with your 2.5X Powermate this will give you 234X which is a useful high power magnification. The 13mm Nagler is also a very good eyepiece but combined with your 2.5X powermate it will give 288X which is a power you might rarely get to use because of seeing conditions.
You might want to consider the 17mm Vixen LVW which would give you 220X in your 2.5X TV Powermate.
It just depends what criteria are most important to you and you're the only one who knows that.
Cheers,
John B