Author Topic: Barlow and/or small eyepieces for Celestron Astromaster 130Eq  (Read 404 times)

housletica

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Re: Barlow and/or small eyepieces for Celestron Astromaster 130Eq
« Reply #15 on: January 25, 2018, 04:15:11 PM »
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rogeriomagellan

Not sure how you drew the conclusion that I don't use finder scopes. I use the finders on all my scopes.

ETX 80 has red dot
ETX 125 has a 6X30 RACI
XT8i came with a 9X50 and I added a red dot on a dual finder shoe.

Perhaps this comment confused you about how I use my scopes.

Low Power Wide View - I have a low power wide view eyepiece for each of my scopes matched to the scope. At the low power end you might consider adding a 32 mm Plossl for 20X and 2.6 degree FOV. That is about as wide a view as you can get on that scope. A great step up from your finder scope and great for star hopping. Some nights I drop in my low power and just scan the sky enjoying the patterns and the wonder of it all.<a href="">http://agenaastro.co...60_degrees.html[/url]

What I mean is that you are looking at something naked eye - Red dot finder. This is a great next step from the finder. Or if you are using a 9X50, this is a great next step from the finder.If I am using computer assist then the finder is used during alignment.

If I am using the scopes manually the finders are used like those on any manual scope. But I can't always see the stars I need to see naked eye in the red dot finders. My skies are pretty badly light polluted.  Naked eye the best I can see in the best part of the sky is about mag 3.5. In other parts it is worse. Some parts of my sky are completely blank to the naked eye so using a red dot is not an option. I don't even turn the scope West except for the moon and Planets.

Even with the 9X50 on the XT8i the view is limited by aperture and magnification. I can see dimmer stars and more detail in a 2" 38 mm 70 degree in the XT8i at 31X then I can see at 9X in a 50 mm finder scope. So I can see more guide stars or can recognize patterns more easily with the low power lens.

Same is true with the 6X30 on the ETX 125. Limited aperture and limited mag can sometimes make it difficult to see the guide stars or the dimmer patterns I am looking for.

I use my scopes manually about 50% of the time so those finders are critical to the experience.

And, I like the low power wide view of these long FL eyepieces.  That may come from my start with binoculars. I still often have my 10X50s with me when I am observing. I will start a session with them and will often finish a session with them.

Hope that clarifies.

Oh, I inferred that from the lines about how good the low power eyepiece is for star hopping.

Another guy had told me that he loved using his 30mm eyepiece more than his finder scope. In fact, he said that he almost never used his finder scope.

A 9x50 right-angle correct-image finder scope must be great. But the one that appeals to me most and would be my buying target is a 50mm right-angle finder with a focuser.

Charles Marin

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Re: Barlow and/or small eyepieces for Celestron Astromaster 130Eq
« Reply #16 on: January 31, 2018, 08:37:01 AM »
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Oh, I inferred that from the lines about how good the low power eyepiece is for star hopping.

Another guy had told me that he loved using his 30mm eyepiece more than his finder scope. In fact, he said that he almost never used his finder scope.

A 9x50 right-angle correct-image finder scope must be great. But the one that appeals to me most and would be my buying target is a 50mm right-angle finder with a focuser.
Have you looked at these?
http://www.stellarvu...e-black-f050m2/

gladinises

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Re: Barlow and/or small eyepieces for Celestron Astromaster 130Eq
« Reply #17 on: February 02, 2018, 03:37:48 PM »
This is the 9X50 RACI that comes with my Intelliscope
http://www.telescope...ord=9X50 finder

Mike Brown

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Re: Barlow and/or small eyepieces for Celestron Astromaster 130Eq
« Reply #18 on: February 02, 2018, 06:06:58 PM »
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Quote

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Oh, I inferred that from the lines about how good the low power eyepiece is for star hopping.

Another guy had told me that he loved using his 30mm eyepiece more than his finder scope. In fact, he said that he almost never used his finder scope.

A 9x50 right-angle correct-image finder scope must be great. But the one that appeals to me most and would be my buying target is a 50mm right-angle finder with a focuser.
Have you looked at these?
http://www.stellarvu...e-black-f050m2/
Thanks for the link.

That one is really awesome because we can use 1.25" eyepieces with it.

The Stellarvue finder scope looks as good as this one:

http://www.teleskop-...al-focuser.html

There are also the 60mm and the 80mm versions:

http://www.teleskop-...inderholde.html

http://www.teleskop-...al-focuser.html

housletica

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Re: Barlow and/or small eyepieces for Celestron Astromaster 130Eq
« Reply #19 on: February 02, 2018, 09:25:43 PM »
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This is the 9X50 RACI that comes with my Intelliscope
http://www.telescope...ord=9X50 finder

How do you like it? It seems to be a very good one, though we cannot use 1.25" eyepieces with it like the ones below:

http://www.teleskop-...inderholde.html

http://www.teleskop-...al-focuser.html

Jason Hillyer

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Re: Barlow and/or small eyepieces for Celestron Astromaster 130Eq
« Reply #20 on: February 03, 2018, 12:56:02 AM »
I like it very much. Eyepiece is not replaceable.

Jasper Banks

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Re: Barlow and/or small eyepieces for Celestron Astromaster 130Eq
« Reply #21 on: February 03, 2018, 11:47:00 AM »
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I like it very much. Eyepiece is not replaceable.

Yeah, I know. But it still seems to be a well-made finder scope. Would you say that it is a major improvement on the regular 50mm straigh-thru finder scope?

pafunsirep

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Re: Barlow and/or small eyepieces for Celestron Astromaster 130Eq
« Reply #22 on: February 09, 2018, 04:11:32 AM »
Never had the straight through 9X50.  the 9X50 RACI is the standard finder on the Orion Intelliscope line.

I have the finder set up so I can move from the finder to the eyepiece and back while I am still seated.  If I drift off the target or bump the scope while I am changing eyepieces the RACI is soooo easy to get to.

Also, with the RACI 9X50, when I am showing someone else the view, even at moderate mag, I can turn the eyepiece so that it facing toward me, standing on the other side of the scope. While the person is at the eyepiece I can use the finder to help with the tracking or to help them get back on the target if they lose it. 

At outreach where I am probably below 100X this works very well.

buddderpdrivla

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Re: Barlow and/or small eyepieces for Celestron Astromaster 130Eq
« Reply #23 on: February 09, 2018, 10:59:47 AM »
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Hi, Alan.Thanks for the picture.

In your previous post, you said that you held the camera up to the eyepiece and snapped the shot of M13. What ocular were you using at that time? Your Parks 25mm Kellner?

As for your 6" f/5 Newtonian reflector, are you fully satisfied with the diameter of the secondary mirror?

Hello Roger,

No, I was probably using a 16mm if not a 12mm.

I tend to favour moderate-to-high powers with the 6" f/5. The secondary has an effective diameter of 48mm. In future, I'll be looking into downsizing it to a 38mm, and so to lessen the secondary obstruction, as I rarely use anything longer than a 20mm with it, if that. I found that practically every time I took it outside, I wanted to ramp up the power almost immediately.

As I see it, I bought a telescope, not a pair of low-power binoculars.