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Old 21-10-2010, 11:59 AM
NGC2264 (Gordon)
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Join Date: Feb 2009
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Need some help: Eyepieces for 10" Dob

Howdy folks.

Have been reading a lot of threads about eyepieces and other people's recommendations. My apologies for starting yet another one, but I really would like some advice and feedback on people's usage of eyepieces.

I have a 10" collapsible Sky Watcher Dobsonian (not the go to), and two years after purchase believe it or not I am still using the original 10mm and 25mm super plossels that came with it (nothing wrong with that).

But I feel it's time to upgrade the eye pieces.

I have a x2 Tele Vue Barlow for a 1.25" eye piece.

I don't really have an objection to getting good quality eye pieces like an Ethos, but I do want to be sensible on cost v performace and so don't mind looking at "second tier" products. I would rather pay an extra $100 if the performance is worth it if you know what I mean. Fundamentally I do have budget constraints and want a sensible solution.

I feel I want to get three maybe four eye pieces over a period of time: high, medium and low. it would strike me that a low magnification, wide field of view eyepiece would expand my current range of eyepieces, and then I can purchase the higher magnification eyepieces and replace the plossels over time.

Some eye pieces stand out from my reading:

William Optics UWAN 28mm (2")
Tele Vue Nagler 4 17mm (2")
Pentax XW 10mm (1.25")

I can barlow the Pentax to get down to a 5mm.

I thinnk my main concerns which i want to get feedback on are:

1) What are peoples thoughts on mixing different brands across the spectrum to cherry pick the better performing products at those magnification points? Or is it better to stay within a range ie Naglers, Panoptics?

2) For a three eye piece set would would peoples recommendations be for focal lengths, and what would they be for a four eye piece set. I think I am tending to a four piece set but I would be interested on people's thoughts.

3) Bit hesitant to pick a low magnification eyepiece 30mm +. Would be interested to hear people's recommendations here as I think this may be my first purchase point.

4) One thing that confuses me a bit is the wider field of views being combined with higher magnification eyepieces. I wish to get an eyepiece that can give me a wide field of view, but does say thenew Ethos 21mm has a 110 degree AFOV make a 41mm eyepiece somewhat redundant ?

As an aside does anyone own the Ethos 10mm or 21mm and do you think they are worth the money compared to other products? Or are they a complete luxury?

5) I have read about the issue of coma with dobsonians. My focal ratio is 4.7. Is it wise to get a paracorr to use with the lower magnification eyepieces?

Thanks and look forward to your feedback.
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