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Eye Piece advice for my new AT102ED

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#1 patrick77

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Posted 24 March 2020 - 02:20 PM

I am new to this Refractor AT102ed. I have Eps that I used with other telescope's that I used to own but I'm not sure if

I need to change for this telescope.  What I feel are pretty good and maybe worth keeping are a Meade series 5000

68deg super wide angle 24mm, a Meade series 5000 82deg ultra wide angle 8.8mm and a Hyperion 17mm modular

68deg widefield with the 14mm conversion ring. Two EPs in one.  Any help on what you may be using with your Refractor 

Would be great. Hoping the three I have will be a good fit.  Thank you...



#2 NYJohn S

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Posted 24 March 2020 - 03:07 PM

One of my favorite eyepieces to use with the AT102ED is my ES 68º 24mm. If that's the same as the Meade 24mm you have I think you'll enjoy it. I also use the Meade 5000 UWA 8.8mm & 5.5mm. For high power I'll use a 2x barlow with them. I don't have a good 2" eyepiece so hopefully others will chime in. I keep thinking a 35mm panoptic would be a nice upgrade from my Agena 38mm. I also have a ES 68º 16mm for medium power which I like.

 

So I think what you have will work nicely with it.

 

Congrats on the new scope! I've been very happy with mine.

 

John


Edited by NYJohn S, 24 March 2020 - 03:09 PM.

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#3 havasman

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Posted 24 March 2020 - 03:15 PM

Excellent choice to complement your Dob.

 

And I started making a list of eyepieces for you but I looked back at what you have and suggest they are fine and that you should give 'em a shot for a while. That way you will see any potential for addition/upgrade that may come to make sense to you.

 

Maxing the FOV is an obvious option as that is what you have now with the AT102ED that you have not had. A 21 Ethos or 20mm APM HDC would likely become your most used eyepiece in that scope if you have a good site and observe DSO's. Both are very good.


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#4 Bomber Bob

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Posted 24 March 2020 - 03:31 PM

I have a ton of eyepieces, most of which are vintage, and none have performed poorly in my AT102ED.

 

For Low Power Sweeping:  A 2" UO 30mm Erfle; or, a 1.25" Meade Research Grade 20mm Erfle.  My spectros 50mm / 40mm / 30mm Kellners (35mm barrels).

 

For Medium Power Viewing:  A 1.25" AT Paradigm 15mm (zoom up to 120x with an APO 2.5x Barlow);  UO 1.25" HD 12.5mm or 9mm Ortho; .965"  spectros 15mm / 10mm Kellner.

 

For High Power Viewing:  Mostly 1.25" barrels.  TV Nagler 7mm, Radian 4mm; UO HD 6mm Ortho; .965" spectros 5mm Plossl.



#5 patrick77

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Posted 24 March 2020 - 06:14 PM

Thank you for your information. Hoping more input from others shows up. Now we need the rain to go away and clear skies to come back..

#6 patrick77

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Posted 24 March 2020 - 06:43 PM

I'm in west TN.. 38057.. pretty dark here but probably not as good as some others viewing area. 45 miles west

Of Memphis and 26 miles from the biggest suburb that in Collierville. 



#7 rustynpp

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Posted 24 March 2020 - 09:51 PM

In my 4" f7 refractor I use the Nagler 31mm, APM 100* 13mm, and Baader Morpheus 6.5mm the most. I've long had plans to add an APM 100* 20mm, but for now those 3 see the most use in this scope, by far.

 

Here is my EP spreadsheet, if you're curious.

 

Screen Shot 2020-03-24 at 10.50.07 PM.png


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#8 SeattleScott

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Posted 24 March 2020 - 10:35 PM

The problem with a 4” F7 Apo is you really need around half a dozen eyepieces to cover the range of magnifications. You have the middle covered, but could really use a 5.5 and 3.5 for high power. Or maybe a 6.5/6.7 and a barlow. Also eventually a 2” low power sweeper eyepiece would be nice.

Meade 5.5/82, Morpheus 6.5, ES 6.7/82 come to mind. You could save some money with a Meade 6.5 HD-60. About as sharp as the others but narrow AFOV by comparison.

For a 3.5 there are several options. I went with a Vixen HR 3.4. Tak has the TOE 3.3 or the 3.6 LE. Might be a Delite or Delos in that range. Or if you have a manual mount, you might get a 3.7/110.

Scott

#9 russell23

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Posted 25 March 2020 - 09:34 AM

I am new to this Refractor AT102ed. I have Eps that I used with other telescope's that I used to own but I'm not sure if

I need to change for this telescope.  What I feel are pretty good and maybe worth keeping are a Meade series 5000

68deg super wide angle 24mm, a Meade series 5000 82deg ultra wide angle 8.8mm and a Hyperion 17mm modular

68deg widefield with the 14mm conversion ring. Two EPs in one.  Any help on what you may be using with your Refractor 

Would be great. Hoping the three I have will be a good fit.  Thank you...

I have this scope and the SV102mm f/7 Access.  One of the things to keep in mind is that there are a lot of premium performing eyepieces in the $230-260 price range.  You did not specify a budget, but some of these eyepieces are on sale right now.

 

So here is my lineup with this scope:

 

30mm APM UFF:  24x, 3.0 deg TFOV  ($229)

18.2mm TV DeLite:  39x, 1.5 deg TFOV ($255)

13mm TV DeLite:  55x, 1.1 deg TFOV ($255)

9mm Baader Morpheus:  79x, 1 deg TFOV ($239 --> $189 on sale right now)

8.5mm Pentax XF:  84x, 0.7 deg TFOV ($129 -->  $99 on sale right now)

6.5mm Baader Morpheus:  110x, 0.7 deg TFOV ($239 --> $189 on sale right now)

4.7mm APM XWA:  152x, 0.7 deg TFOV ($250)

 

I also use the 3x TV barlow ($128) and 1.6x Nikon barlow ($215)

 

The thing about every one of these eyepieces is that they are very high performing eyepieces.  I don't know what cost you have in mind, but I certainly would consider the 8.5mm Pentax XF.  Despite a regular price of only $129 it is as good as the TV DeLite eyepieces which are all excellent.   The 30mm APM UFF is basically like a long focal length Baader Morpheus. 

 

At any rate, you did not specify a price range so I am sharing what I am using.  If you need to go lower on the cost the Meade UWA are on sale right now and are very good.  The 5.5mm focal length is the best of that line.   There are a number of good lower cost eyepieces such as the Astrotech Paradigms. 

 

Any of the TV DeLite's work well with this scope. 


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#10 sunnyday

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Posted 25 March 2020 - 09:56 AM

I will have this telescope soon in another version.
I’m going to try the explore scientific 52 ° = 3mm, 6mm, 10mm, 20mm, and 30mm.
I'll see what it gives as results.



#11 patrick77

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Posted 25 March 2020 - 10:52 AM

I have this scope and the SV102mm f/7 Access.  One of the things to keep in mind is that there are a lot of premium performing eyepieces in the $230-260 price range.  You did not specify a budget, but some of these eyepieces are on sale right now.

 

So here is my lineup with this scope:

 

30mm APM UFF:  24x, 3.0 deg TFOV  ($229)

18.2mm TV DeLite:  39x, 1.5 deg TFOV ($255)

13mm TV DeLite:  55x, 1.1 deg TFOV ($255)

9mm Baader Morpheus:  79x, 1 deg TFOV ($239 --> $189 on sale right now)

8.5mm Pentax XF:  84x, 0.7 deg TFOV ($129 -->  $99 on sale right now)

6.5mm Baader Morpheus:  110x, 0.7 deg TFOV ($239 --> $189 on sale right now)

4.7mm APM XWA:  152x, 0.7 deg TFOV ($250)

 

I also use the 3x TV barlow ($128) and 1.6x Nikon barlow ($215)

 

The thing about every one of these eyepieces is that they are very high performing eyepieces.  I don't know what cost you have in mind, but I certainly would consider the 8.5mm Pentax XF.  Despite a regular price of only $129 it is as good as the TV DeLite eyepieces which are all excellent.   The 30mm APM UFF is basically like a long focal length Baader Morpheus. 

 

At any rate, you did not specify a price range so I am sharing what I am using.  If you need to go lower on the cost the Meade UWA are on sale right now and are very good.  The 5.5mm focal length is the best of that line.   There are a number of good lower cost eyepieces such as the Astrotech Paradigms. 

 

Any of the TV DeLite's work well with this scope. 

Sorry I would like to keep the amount I spend down if possible.  Around $100.00.  I have looked at Higher priced EPs, not sure if spending that much can happen right now.. 

Thank you for your information!!



#12 sunnyday

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Posted 25 March 2020 - 11:06 AM

Sorry I would like to keep the amount I spend down if possible.  Around $100.00.  I have looked at Higher priced EPs, not sure if spending that much can happen right now.. 

Thank you for your information!!

hi,

see the Explore Scientific 52 ° eyepieces, they are currently on sale.



#13 russell23

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Posted 25 March 2020 - 11:42 AM

Sorry I would like to keep the amount I spend down if possible.  Around $100.00.  I have looked at Higher priced EPs, not sure if spending that much can happen right now.. 

Thank you for your information!!

Ok, then I would definitely put the 8.5mm Pentax XF as a serious consideration on your list as it is on sale for $99.   You will be getting a very high performing eyepiece that is great for deep sky and lunar/planetary.  If you pick up a barlow you can use it for higher magnifications.

 

However, you did mention having an 8.8mm Meade UWA so the 8.5mm Pentax would duplicate things.  You would probably only want to get the 8.5mm Pentax if you were looking to replace the 8.8mm Meade.  You might look at the 5.5mm Meade UWA as an option - also on sale for $99. 

 

You actually are pretty well covered on the lower magnification end by the eyepieces you listed:

 

24mm --> 30x

17mm --> 42x

14mm --> 51x

8.8mm --> 81x

 

So really looking at higher magnification options might make more sense.  A few options for <$100:

 

6.5mm Meade HD-60 --> 110x ($79)

5.5mm Meade UWA --> 130x ($99)

4.5mm BST UWA --> 159x ($55 - Also available in 4mm and 5mm focal lengths and a bunch of others if you are interested):

 

https://agenaastro.c..._planetary.html

 

I've used the BST UWA line and they are really good value eyepieces.  The huge range of available focal lengths is a nice bonus.

 

 

 


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#14 MP173

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Posted 26 March 2020 - 11:02 AM

I have had the AT102ED since late June '19 with 46 sessions.

 

First, this is an absolute gem of a telescope for me.  My ETX90RA was a workhorse for 20 years and the AT is a much better scope in many ways.

 

I have very simple eyepieces:

 

32mm Meade Plossl - 22x    2.34 fov

26mm Meade Plossl- 27x     1.9 fov

20mm Astrotech Plossl - 36x  1.46 fov

16mm Meade Plossl - 44x       1.17 fov

12mm unbranded Astronomics demo on sale - 59x, 1.01 fov 

9mm Astrotech Plossl - 79x      .65 fov

6 mm Astrotech Plossl - 118x   .44 fov

4mm Astrotech Plossl - 178x    .29 fov

 

These inexpensive eyepieces work quite well for me.  I have never viewed thru a more expensive eyepiece so cannot make comparison judgements but I will tell you this....the Astrotech Plossl, particularly the 20mm and 9mm are my workhorses.  The views are crisp and in focus to the edge of FOV.

 

I purchased the 12mm unbranded about a month ago (absolute fov is about 60 degrees if I recall) and enjoy the midrange magnification between the 16 and 9mm.  It does provide a wider FOV but it is not as sharp at edges as the Plossls.

 

The 6mm is used to separate tight doubles and works pretty well.  

 

The 4mm is used sparingly...difficult to achieve prime focus unless the conditions are ideal....plus the narrow .29 fov gives me very little time to view and object before nudging it and then awaiting my Twilight 1 mount to calm down.

 

BTW - the 20mm and 9mm Plossls were about $22 each and the 4 and 6mm were $10 each.  The 12mm was about the same.

 

As you can see I have not invested much in the eyepieces.  At some point when the COVID 19 settles down I hope to view thru "better" eyepieces before I invest in a more costly glass.

 

For now, I am very satisfied and eagerly anticipate the next clear night.

 

Ed


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#15 patrick77

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Posted 26 March 2020 - 12:53 PM

Ok, then I would definitely put the 8.5mm Pentax XF as a serious consideration on your list as it is on sale for $99.   You will be getting a very high performing eyepiece that is great for deep sky and lunar/planetary.  If you pick up a barlow you can use it for higher magnifications.

 

However, you did mention having an 8.8mm Meade UWA so the 8.5mm Pentax would duplicate things.  You would probably only want to get the 8.5mm Pentax if you were looking to replace the 8.8mm Meade.  You might look at the 5.5mm Meade UWA as an option - also on sale for $99. 

 

You actually are pretty well covered on the lower magnification end by the eyepieces you listed:

 

24mm --> 30x

17mm --> 42x

14mm --> 51x

8.8mm --> 81x

 

So really looking at higher magnification options might make more sense.  A few options for <$100:

 

6.5mm Meade HD-60 --> 110x ($79)

5.5mm Meade UWA --> 130x ($99)

4.5mm BST UWA --> 159x ($55 - Also available in 4mm and 5mm focal lengths and a bunch of others if you are interested):

 

https://agenaastro.c..._planetary.html

 

I've used the BST UWA line and they are really good value eyepieces.  The huge range of available focal lengths is a nice bonus.

 

Russel thank you for the good information.. I was wondering I have cheap Barlow’s, does that make a difference.



#16 patrick77

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Posted 26 March 2020 - 01:04 PM

I have cheap Barlows. How much do they change for the more expensive ones?



#17 SeattleScott

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Posted 26 March 2020 - 01:50 PM

A lot of people will point to Televue. In the past there were some other higher end ones like Vernonscope Magic Dakin or UO Klee but not sure if these are still in production. Also the older Japanese Celestron Ultima barlows are considered very good, and typically go for around $40 in the classifieds.

Some people have their favorite budget barlow, the GSO 2x ED seems to get good reviews for a cheaper barlow. Not sure how much better Televue is.

Scott

#18 jimandlaura26

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Posted 26 March 2020 - 11:26 PM

I am new to this Refractor AT102ed. I have Eps that I used with other telescope's that I used to own but I'm not sure if

I need to change for this telescope.  What I feel are pretty good and maybe worth keeping are a Meade series 5000

68deg super wide angle 24mm, a Meade series 5000 82deg ultra wide angle 8.8mm and a Hyperion 17mm modular

68deg widefield with the 14mm conversion ring. Two EPs in one.  Any help on what you may be using with your Refractor 

Would be great. Hoping the three I have will be a good fit.  Thank you...

Here are my eyepieces for a Stellarvue SVR-102T 102 mm  F/7. They are Pentax XW eyepieces with great execution of clarity, absence of color, sharp focus across field of view, minimal distortions and eye relief. Also important are the field of views in successive eyepieces for bracketing DSO’s, which you can replicate in planetarium software like Sky Safari. The column marked AR is the area ratio of successive eyepieces. Magnification of 204X in 3.5mm is a practical limit given seeing, exit pupil and brightness limits.
 

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Edited by jimandlaura26, 27 March 2020 - 12:09 AM.



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