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Old Monday 25th September 2017, 09:55   #1
cefnlad
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New Eyepiece

I have an Acuter Grandvista 65, with the normal 16-48x zoom eyepiece. The scope takes a 1.25" EP and I would like to add a fixed eyepiece of say between 12mm and 20mm, which should give between 20x - 30x. Any recommendations?
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Old Monday 25th September 2017, 11:59   #2
jring
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Hi,

the Explore Scientific 68 and 82 degree series EPs are well regarded as fairly cheap and well corrected even with fast instruments.
I have the 16mm ES 68 which works very well on my TSN-3 (but I have not adapted it since I have a Kowa 30 wide EP). I also use it permanently on my Opticron MMS 160.

Joachim
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Old Monday 25th September 2017, 12:23   #3
dogbreath
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Have a read of the Pentax threads. There is plenty of discussion there about fixed 1.25 eyepieces.
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Old Monday 25th September 2017, 21:18   #4
cefnlad
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Thanks for the replies.

I have also been referred to the Celestron X-Cel LX range. Any views?
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Old Monday 25th September 2017, 22:57   #5
giosblue
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If you're not concerned about weatherproofing theBST Explorer are excellent. I have a 12mm and 15mm. I also have a 12mm Pentax and to be honest I can't see the difference between that and the BST 12mm. They really do punch above their weight. You can use Opticron fixed ep's, I have 22mm 40810 old type and a 16mm 40809 and these are pin sharp. The 22mm is just as good as the 20mm Pentax I have. The problem with 1.25 eyepieces is there is too much choice and they are all excellent.
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Old Monday 25th September 2017, 23:24   #6
jring
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Quote:
Originally Posted by cefnlad View Post
Thanks for the replies.

I have also been referred to the Celestron X-Cel LX range. Any views?
Here's some thoughts on these... seem to be available under a number of brands, one being Meade HD-60 series.

https://www.cloudynights.com/topic/4...-lx-eyepieces/

TLDR: 18mm best avoided, 12mm ok-ish but not more, 7, 9 and 25mm quite good.

Probably not quite up to the ES Televue clones, but of course even cheaper.

Joachim
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Old Tuesday 26th September 2017, 00:17   #7
cefnlad
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Quote:
Originally Posted by jring View Post
Here's some thoughts on these... seem to be available under a number of brands, one being Meade HD-60 series.

https://www.cloudynights.com/topic/4...-lx-eyepieces/

TLDR: 18mm best avoided, 12mm ok-ish but not more, 7, 9 and 25mm quite good.

Probably not quite up to the ES Televue clones, but of course even cheaper.

Joachim
Just spotted this thread!
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Old Friday 29th September 2017, 23:17   #8
Pluraldave
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I prefer the eyecup design of the BSTs to the X-cel LX. Optically they're pretty similar and in my opinion both just as good as the ES68 range, which is waterproof and has a slightly wider field but suffers from more pincushion distortion as a result.

If you observe whilst wearing glasses the 16mm ES68 is a bit short on eye relief. The 20mm will have more and may or may not be ok.
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