What new eyepiece

[AstroNebulee]

Hi

I have a celestron astromaster 130eq, also a 2x barlow lens, 20mm plossl and 10mm eyepieces. What other size ep would all of you fine people suggest I purchase next. 

 

Kind regards 

[Mick H]

Celestron Omni Plossl 32mm EP:

https://www.firstlightoptics.com/celestron-eyepieces/celestron-omni-plossl-eyepiece.html

[Timebandit]

 

 

Helio , I would opt for something in the 12mm to 15 mm range for DSO. And a higher magnification eyepiece around the 6mm to 7mm for Luna and planetary targets. A good eyepiece with great reviews are the BST Starguders, very sensible money new and great value on second hand .

 

 

[AstroNebulee]

Thank you guys I was thinking in around the 6 to 7mm range, how would these work with the barlow or would they be to blurred 

[bomberbaz]

9 hours ago, LeeHore7 said:

Thank you guys I was thinking in around the 6 to 7mm range, how would these work with the barlow or would they be to blurred 

Techically your scope should go up to mag x260 so a 7mm barlowed would work but imho you are pushing it to the maximum. Technical magnifications and reality don't always go together. My first scope was the same as yours and when I barlowed a 7mm x-cel in the same I found the view had suffered a little at this magnification but was still ok. Inexperience at that time led me to expect more than was realistic if I am honest though.

130*F5 = 650. 650/3.5 = mag x185. On a good night with good seeing conditions though should give nice planetary views and also be useful on planetary nebula.

A 6 barlowed giving near time 220 I think might be too much for the scope but again, my opinion only. 

An 8mm BST barlowed is giving x162 which would give a slightly smaller but better resolved view.

See below for both 7 & 8 mm eyepieces barlowed on Jupiter. The difference at the eyepiece as you can see will not be significant.

I am sure others will have their own thoughts on this. Personally I think the 8mm will be a more usefull addition and basically replace the 10mm which you may already have found is not the best. 

[AstroNebulee]

3 hours ago, bomberbaz said:

Techically your scope should go up to mag x260 so a 7mm barlowed would work but imho you are pushing it to the maximum. Technical magnifications and reality don't always go together. My first scope was the same as yours and when I barlowed a 7mm x-cel in the same I found the view had suffered a little at this magnification but was still ok. Inexperience at that time led me to expect more than was realistic if I am honest though.

130*F5 = 650. 650/3.5 = mag x185. On a good night with good seeing conditions though should give nice planetary views and also be useful on planetary nebula.

A 6 barlowed giving near time 220 I think might be too much for the scope but again, my opinion only. 

An 8mm BST barlowed is giving x162 which would give a slightly smaller but better resolved view.

See below for both 7 & 8 mm eyepieces barlowed on Jupiter. The difference at the eyepiece as you can see will not be significant.

I am sure others will have their own thoughts on this. Personally I think the 8mm will be a more usefull addition and basically replace the 10mm which you may already have found is not the best. 

Hi

Thank you for your reply, I like the idea of the 8mm or 7.5mm as to replace the 10mm which as you say is not the best one to use and gives Jupiter a over exposed look. Where do you get the ep software that shows the fields of view as views as it looks very useful 

[bomberbaz]

17 minutes ago, LeeHore7 said:

Hi

Thank you for your reply, I like the idea of the 8mm or 7.5mm as to replace the 10mm which as you say is not the best one to use and gives Jupiter a over exposed look. Where do you get the ep software that shows the fields of view as views as it looks very useful 

Bottom of this page

https://www.firstlightoptics.com/bst-starguider-eyepieces/bst-starguider-60-32mm-ed-eyepiece.html

[AstroNebulee]

8 minutes ago, bomberbaz said:

Bottom of this page

https://www.firstlightoptics.com/bst-starguider-eyepieces/bst-starguider-60-32mm-ed-eyepiece.html

Hi

Thank you it looks a great piece of software to look for ep much appreciated. 

Clear skies 

[bomberbaz]

1 minute ago, LeeHore7 said:

Hi

Thank you it looks a great piece of software to look for ep much appreciated. 

Clear skies 

No worries, link to the 8 here also https://www.firstlightoptics.com/bst-starguider-eyepieces/bst-starguider-60-8mm-ed-eyepiece.html

[bomberbaz]

2 minutes ago, LeeHore7 said:

Hi

Thank you it looks a great piece of software to look for ep much appreciated. 

Clear skies 

Oh and just a quick heads up, the 8mm BST is reputedly there best eyepiece from the range from what I remember reading although as i haven't used one in this size I cannot confirm that to be the case.

[ScouseSpaceCadet]

1 hour ago, bomberbaz said:

Oh and just a quick heads up, the 8mm BST is reputedly there best eyepiece from the range from what I remember reading although as i haven't used one in this size I cannot confirm that to be the case.

The 8mm feels like a decent performer. I've used mine in 130/650, 203/1200 & 150/750 newtonians, a 120/600 refractor and a 102/1300 Maksutov.

As you mentioned above bomberbaz, it replaces the 10mm stock eyepiece. 

[AstroNebulee]

Thanks guys, all taken on board and shall be purchasing one and like you say will make my 10mm one that cane with the scope obsolete as its not to great. 

[KeithP22]

On 18/06/2020 at 20:39, Mick H said:

Celestron Omni Plossl 32mm EP:

https://www.firstlightoptics.com/celestron-eyepieces/celestron-omni-plossl-eyepiece.html

are the celestron omni good eyepieces. 

[Louis D]

45 minutes ago, KeithP22 said:

are the celestron omni good eyepieces. 

They're decent, but probably no better than the Astro Essentials Super Plossls or the Revelation Plossls.  Some are made in China, some in Taiwan, but in the end, all the lenses may be sourced from the same supplier.