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Refractor eye pieces

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#1 gardenfish

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Posted 04 November 2018 - 07:06 PM

I am about to make the Takahashi TOA150 my visual scope.  I currently have

 

2" eyepieces

 

Orion Stratus                          30mm 68°

TeleVue Nagler type2             20mm  Hand grenade!!!

ES Argon                                14mm 100°

 

1.25" eyepieces

 

TeleVue Panoptic                   19mm

 

 

I have an AT2" Barlow and a TeleVue 4x Powermate

 

I wish to do both Deep space and Planetary observing. What other eyepieces or barlows would you recommend? Or am I good to go for awhile?

 

 

Thanks Rick

 

 



#2 junomike

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Posted 04 November 2018 - 07:09 PM

You could most likely get by with what you have however I'd add a TVZ 3 - 6 for Planetary as It's all you would really need (magnification coverage)


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#3 Tyson M

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Posted 04 November 2018 - 09:20 PM

An interesting collection of eyepieces, and yes you really don't need much more. 

 

My bias thoughts are that the TOA150 represents the pinnacle of refractors today, and it comes with a hefty price tag.  I wouldn't potentially hamstring it with anything but the best quality optics with generous fields of view.

 

It appears you have various refractors for imaging purposes regarding image scale, but I would invest in some Nikon or Docter, Pentax XW's or Delos, or Ethos eyepieces to compliment that visual optical train.  Also a premium diagonal from Baader, Astrophysics or Tele Vue if you don't have one already.

 

Yes, it is not cheap to invest in imaging and visual top of the line gear, but to extract the best from your TOA I would not do it any other way.  I've read that the Nagler zoom is great but apparently falls short a bit optically compared to fixed focal lengths, but others can confirm that not me.

 

At the very least, I would switch out the AT2x barlow for a TV 2" powermate. I think the powermates are a bit sharper than barlows in general. I loved using powermates more than TV barlows.

 

I can't comment on the 19mm Pan specifically, but I have seen a 31 nagler outperform a 35 panoptic for apparent sharpness. For that reason alone I would get a 17.3 Delos over the 19 pan.

 

Just my 2cents...



#4 havasman

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Posted 04 November 2018 - 10:57 PM

My bias thoughts are that the TOA150 represents the pinnacle of refractors today, and it comes with a hefty price tag.  I wouldn't potentially hamstring it with anything but the best quality optics with generous fields of view.

I'd want a high-end widefield for sure, something like a 31T5 Nagler/41Pan/ES82 30/ES68 40.

And I'd certainly want a couple of Tak Abbe Orthos in the mid and bottoms ends. They're huge bargains.

You've arguably one of the very best refractor optics and they deserve matching quality eyepieces.


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#5 gardenfish

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Posted 04 November 2018 - 11:01 PM

I have an excellent TeleVue 2" diagonal and have my eye out for a 2x Powermate. The Delos line looks like a decent line to try a couple of eyepieces. I see most all are 1.25" barrels. Does the 1.25" barrel detract from viewing over a 2" barrel?

 

Rick


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#6 Tyson M

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Posted 04 November 2018 - 11:27 PM

2" eyepieces typically have bigger the true field of view, the more immersion or space-walking feel you get while observing. I've tried Naglers and Ethos, but settled on Delos (at smaller focal lengths) because of eye relief for wearing glasses. I would use Ethos if I didnt like to wear my glasses while observing.

 

Along with the Ethos, Delos are the sharpest eyepieces I have used. You would be hard-pressed to find someone who didnt think Delos are some of the best eyepieces ever made. There are other good brands though as well like Nikon/Pentax ect. 

 

I also agree on the 31mm Nagler suggestion above. On a big scope with a good focuser, and EQ mount the 31mm nagler cant be beat. Also the 22 Nagler is one of my favorites, but if you dont wear glasses the 21 Ethos is king. 

 

It is easy to spend a ton of money though down the EP rabbit hole. So if you went Delos (also not cheap), you could get decent wide fields with beautiful double star or planetary views in that TOA that you wouldnt regret.

 

Download Stellarium for free and enter your scope and eyepieces specs and see how the field of view compares on your favorite targets.

 

Try to pick up EP's used to cut down the costs a bit. Pick up a Delos at your favorite focal length in that range and see how you like it. You could always sell it if you didn't get on with it.


Edited by Tyson M, 04 November 2018 - 11:31 PM.


#7 gardenfish

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Posted 05 November 2018 - 07:57 AM

I have Stellarium and use all the time for camera and scope fov. I will plug in some eye pieces and check it out too. As I already have the 20mm nagler I think I will keep that for the midrange. I may try the ES 68° 40mm for wide field and hunt for a 3.5 or 6mm in Delos

 

With a 2x and a 4x powermate the 20mmNagler  = 20-10-5mm

                                                              the ES40 = 40-20-10mm

                                                              theES14 = 14-7-3.5

 

If I use a 6mm Delos with a 2xPowermate I could have 6-3mm, and 1.5mm with a 4x if that is not too small, or would it be better on planets to get a dedicated 3.2mm Delos? And would a 3.2 work with a 2x Powermate?

 

Or any other suggestions wink.gif

 

Thanks Rick


Edited by gardenfish, 05 November 2018 - 08:39 AM.


#8 gardenfish

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Posted 05 November 2018 - 09:57 PM

So far I ordered an ES 68° 40MM. I think it will be a better widefield than the Stratus 30mm. With the 20mm Nagler and the ES14MM 100° Iam trying to figure out if I will be better off with a 3.2 or 6mm Delos. I have the 4x Powermate and will soon have the 2x Powermate.

 

I am thinking 3.2 for Planetary.

 

 

Rick


Edited by gardenfish, 05 November 2018 - 10:00 PM.

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#9 Tyson M

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Posted 07 November 2018 - 07:52 AM

3.5 delos needs very good seeing conditions typically.

 

If you got the 6D you can use your 2x AT Barlow 


Edited by Tyson M, 07 November 2018 - 05:13 PM.

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#10 gardenfish

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Posted 07 November 2018 - 06:12 PM

Thank you for the advice. So now it's down to the 6mm or 8mm Delos???

 

 

Any other thoughts or suggestions before I press "buy" button?

 

 

Thanks Rick


Edited by gardenfish, 07 November 2018 - 06:13 PM.


#11 Tyson M

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Posted 08 November 2018 - 11:54 PM

My seeing conditions are rarely good enough for over 150x viewing. The odd time for Mars can handle around 200-250x 

 

Jupiter looks best at 150x IMO.  Deep sky is a mixed bag, depending on what you like and how to frame the objects. 

 

I would choose the 8mm and you can 2x barlow it to 4mm.   

 

At 1110mm focal length for your TOA that is 139x and 278x, which would be my choice over the 6mm.


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#12 gardenfish

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Posted 09 November 2018 - 06:32 AM

I put them both on Stellarium and  had not run the numbers yet but also decided the 8mm would be the best choice. The ES127 FDC100 arrived yesterday so now just waiting on ordering a Moonlight for it and then swap it out with the Toa150 in the Observatory and try the Toa visually.

 

Thanks Rick



#13 gardenfish

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Posted 11 November 2018 - 09:24 AM

I received the ES 40mm and the Powermate 2x is on the way. Now just need to find an 8mm Delos and stargaze smile.gif . Im going to look through the ES127FCD100  to start while I await the Moonlite focuser so I can use it for imaging. Thanks for all the suggestions.

 

 

Rick



#14 csrlice12

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Posted 11 November 2018 - 10:12 PM

JMHO....have both the 8 Ethos and the 8 Delos....9 times out of 10, the Ethos is selected over the Delos....Both are well corrected....the Ethos obviously has a wider fov, but the weight is about the same.  With tracking, the extra fov may not be necessary....but it certainly doesn't hurt.



#15 gardenfish

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Posted 11 November 2018 - 10:45 PM

Wanting eye relief for Linda so she can wear here glasses and me without I chose the Pentax XW 7mm. It will be my first Pentax but from all the research I think we will be happy. Thanks for all the suggestions and help.

 

 

 

Rick


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#16 bobito

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Posted 11 November 2018 - 11:17 PM

I just completed my set of XWs, glasses or not (I need glasses over 1.6mm exit pupil) they are the most comfortable EPs I've used across the line.  There are individual EPs that I enjoy as much (Nagler 22 t4 and Panoptic 35 spring to mind) but the XWs are all great, I'm sure you will love it.

 

Enjoy!


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#17 Tyson M

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Posted 11 November 2018 - 11:30 PM

I too loved the pentax XW's. You will be very happy with the 7mm



#18 25585

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Posted 12 November 2018 - 09:38 AM

Good choice. I find for shorter the XLs are comfier, but love my 7 & 10 XWs. 




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