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2" eye piece


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I would buy the reducer and aim for a selection of both.

 

You need something like.

 

30mm for widefield in 2" format

20 mm in 1.25"

16mm in 1.25"

10mm in 1.25"

6mm in 1.25"

 

This gives you a nice spread and covers all most everything.

 

What scope did you buy and what eyepieces are you looking at?

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Cheers Doc, great explanation, very helpfull. I have the sw 100ed and looking for 3 different EP not including a Barlow or zoom piece, have just read an article on the best one's for the 100ed and they recommend a 5,12 and 32mm. Does that sound about right? Then I could get a 32 in a 2" and the others in 1.25, Also it comes with a field reducer will it still work with the 1.25 EP

Thanks again Mike

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2 hours ago, Milzy said:

Cheers Doc, great explanation, very helpfull. I have the sw 100ed and looking for 3 different EP not including a Barlow or zoom piece, have just read an article on the best one's for the 100ed and they recommend a 5,12 and 32mm. Does that sound about right? Then I could get a 32 in a 2" and the others in 1.25, Also it comes with a field reducer will it still work with the 1.25 EP

Thanks again Mike

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That sounds about right but get one between 12mm and 32mm say 20mm.

 

So you will have.

 

5mm

12mm

20mm 

32mm

 

With that line up you will not need a barlow. Personally i never use barlows, it's just another piece of glass in the optic train and in my mind degrades the image.

 

 

 

Edited by Doc
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Not sure if it does, its not arrived yet but in the description of kit is comes with is a diagonal, focal reducer and a 28mm EP. Has any of you guys used the Baader hyperion set of 4 from flo, they fit 2" and 1.25 at 375 quid tho there expensive. 

Mike

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My guess is that the diagonal and the 28mm are the same as these.

 

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The 28mm LET (Long Eye relief Twist up eyeguard) is a reversed Kellner I think. It's virtually indestructible.

 

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https://www.firstlightoptics.com/baader-planetarium/baader-hyperion-aspheric.html

 

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I'm quite partial to the Baader Hyperion Aspherics. I use them a lot.

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I started off with the Baader set-of-4, to which I added their 31mm Aspheric, which I still have.  A nice set of lenses, which I always used as 2" for maximum field of view and mechanical stability.

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The hyperions are great eyepieces but don't perform as well in fast scopes. I had an f7 and they were great, but when I moved to f5 they weren't so good so I went to explore scientific. I use the 100° range but the 82° and lower get great reviews as well.

 

I did have a 32mm panaview as Baz mentioned above and for its price I couldn't fault it but it's gone to a new home now. But only for the simple reason it had the same fov as my 20mm es so didn't see much point keeping it.

Edited by tuckstar
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I don't really own many 2" eyepieces.

 

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The ones I do are mainly for low power/rich field observing.

 

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Remember that weight can be a significant factor.

 

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I bought the 18mm ES (above left) principally to replace the 19mm Celestron Luminos (above right). The Luminos is considerably heavier. I prefer it ergonomically in many ways and it has a 30mm field stop. The 18mm ES is better in faster scopes, although the eye relief is tight IMO.

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