Author Topic: Recommend eyepieces for SCT 8"  (Read 295 times)

Tawakal Stahlberg

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Recommend eyepieces for SCT 8"
« on: December 29, 2017, 01:23:16 AM »
Hi everyone,

I am new to the community. I has some questions hope to get some expert opinion.

I recently bought a Celestron AVX 8" SCT, and bought another two Eyepieces already, ES 82 6.7mm and ES 82 11mm.

I am thinking to continue on ES line, maybe 18 and 30. Then with a good 2x Barlow, it could pretty much cover my need for planteary and DSO view, will it?

Another question is ES 82 line 30mm is 2" barrel which does not fit my 1.25 Visual Back. Is there any other good 1.25 Wild field low power eyepeice recommendation? or can I get a visual back adpopter for it? or even 30 mm is NOT the right choice?

Thank you,



Todd Treser

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Re: Recommend eyepieces for SCT 8"
« Reply #1 on: December 31, 2017, 06:26:26 AM »
Meade 4000 32mm 1.25.

Nice EP. Good for location things in the wide field. Also good for Lunar observation.

..Joe

Stephen Moritz

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Re: Recommend eyepieces for SCT 8"
« Reply #2 on: January 03, 2018, 12:28:54 PM »
The 30mm ES82 works beautifully on a C8. So does the 18mm ES82. You can get a 2" diagonal, instead of your 1.25" diagonal, so you can use them. The 18mm is also a 2".

You will perhaps not use the 6.7mm all that often, but you'll use the 30mm, 18mm and 11mm all the time. They are fantastic eyepieces for a C8. Have them myself.Clear skies!
Thomas, Denmark

ropnolini

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Re: Recommend eyepieces for SCT 8"
« Reply #3 on: January 08, 2018, 05:30:27 PM »
Astrojensen,

Thank for reply. For ES82 18 & 32, when you mean 2" diagonal. Do you have a link to it? Do I have to change visual back from 1.25 to 2 as well or just Diagonal?

I like ES 82 serial, good value and very good image quality.

Cleaer Skyies,
James

esrescioripp

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Re: Recommend eyepieces for SCT 8"
« Reply #4 on: January 10, 2018, 02:58:18 AM »
Try the ES 68 degree 24mm. About the widest field of view you can get with a 1.25 inch eyepiece.

Robert Farley

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Re: Recommend eyepieces for SCT 8"
« Reply #5 on: January 10, 2018, 05:11:35 AM »
Send back the 6.7 and trade for one of the others. You just wont use it much. A 2" diagonal you will use alot.
Bruce

Patrick Zhu

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Re: Recommend eyepieces for SCT 8"
« Reply #6 on: January 11, 2018, 07:47:33 AM »
Thanks Jim and Lola, I will look into it.

Alex Miller

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Re: Recommend eyepieces for SCT 8"
« Reply #7 on: January 11, 2018, 03:44:23 PM »
A 2" diagonal is a very good investment. It will help you utilize your OTA to its full potential. Regarding eyepieces, my advice is to step back, take a deep breath and ponder what you would like to view and the direction you may go with the hobby before buying too many eyepieces. The 82 degree eyepieces will give spectacular views, no doubt. But . . . . you may find in several months that you go in the direction of a binoviewer, or Electronically Assisted Astronomy, or nightvision, or astrophotography, or switch to a Dob, or that you prefer 60 degree eyepieces, or that you have a secret Plossl fetish.

Buying eyepieces is a mix of philosophical, emotional, scientific, practical thought, and irrational desire. Research and weighing user opinions can/will become an obsession. At some point when you have a worthy collection of expensive glass, you will become satiated. Then you'll look back at all those thoughtful purchases and realize that you only need 1/4 the number of eyepieces you own. I have a modest set of eyepieces with several I really like, several I rarely use and a mistake or two. For me it was the binoviewer and ZWO camera that changed my eyepiece needs. Hindsight is 20/20.

My recommendation for your 8" SCT:  A 2" diagonal, a 2" 30-40mm eyepiece and a 2X barlow or focal extender will address most of your viewing needs. You may have opportunity to use your 6.7mm once in a blue moon.

Brand, price range,and field of view are your choice.

Charlie Carpenter

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Re: Recommend eyepieces for SCT 8"
« Reply #8 on: January 11, 2018, 05:27:28 PM »
A 6.7mm could be a great planetary eyepiece with an 8" but only if your region periodically gets the seeing to use it. I've lived places where a 7mm was my go to Mars eyepiece during Summer, but inland California is not one of them. Here 11mm is a high power eyepiece in an 8" SCT. Even in a region with good seeing a 9mm will be useful more frequentlythan something in the 7 range. Long term the 6.7mm will get some use, but not very much unless the Bay area where you are regularly gets some very good seeing.

I consider a 2" diagonal a must for an 8" SCT. It opens the door to wider fields. If you periodically get out to dark skies you might even consider a 55mm Plossl for large nebulae. But in the short term something like a 35 Panoptic is likely a better fit. An 82 degree field eyepiece in the size 30-31 size range can work well too, but they are very heavy by comparison. Oh, when you add a diagonal, consider adding some sort of dovetail weight system for balance with the 2" formats, dew shields and the like.

nontpremlapi

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Re: Recommend eyepieces for SCT 8"
« Reply #9 on: January 13, 2018, 05:16:05 AM »
The only real problem with waiting on going to 2" is that some of what you buy in the interim would best be served by a 2" eyepiece. Once you go to 2" you will likely have little use for the mid-focal length ES 68's. It is not a big deal, but it is money that could be put toward 2" that you will likely transition to instead. I've got an old 19mm TeleVue widefield and 40mm TeleVue Plossl in 1.25"that I picked up for the same reasons. Neither has gotten much scope time since I went to 2" and both were replaced by 2" eyepieces that did a better job.

I can't fault you for the incremental approach, I did the same thing.With the benefit ofhindsight, I would have done it differently.

freddormasa

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Re: Recommend eyepieces for SCT 8"
« Reply #10 on: January 20, 2018, 05:08:08 PM »
Certainly for eyepieces join astromart ($15 a year) and buy and sell there. When you buy a used eyepiece, you can as a rule sell it again at very near the same price, unless you've done something bad to it.

The thing about SCTs is they have limited field of view. A 2" 70 degree eyepiece will give you the maximum field of which the scope is capable which comes in handy for things like dialing in the finder to be parallel with the ota. It also comes in handy when you're bumbling around looking for something and not quite finding it.  In the back of your mind keep open the possiblity of mounting an 80mm refractor on your c8. Highly agreeable combination.

Greg N

Todd Topcic

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Re: Recommend eyepieces for SCT 8"
« Reply #11 on: January 20, 2018, 11:29:47 PM »
What Greg N. said...
as for a 2" that won't break the back I'd recommend the Olivon 70 22mm. This gives you approx 90x but in a nice comfortable 2" eyepiece with great eye relief. It really is a pleasure to use. Such an emersive experience. http://www.eyepieces...e_p/7102220.htm

I also have the William Optics 2" Dura Bright SCT Diagonal. It comes with both the adapter to screw directly to the SCT threads as well as the regular tailpiece that goes in a focuser or visual back. Ive found this one to be the lowest profile of any diagonal combo for an SCT.
http://www.highpoint...CFYw7gQodsqUI1g

rankkozical

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Re: Recommend eyepieces for SCT 8"
« Reply #12 on: January 21, 2018, 02:41:22 AM »
Thanks all for commeting. I now considering 2" diagonal and eyepiece as my VX mount should able to take the weight.

I am thinking to get ES 82 18mm and 24mm, as 30mm might be too heavy?

scenunhadef

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Re: Recommend eyepieces for SCT 8"
« Reply #13 on: January 21, 2018, 05:06:56 AM »
I have the evolution mount and I did choose the sky watcher aero 40 mm 68, to get the maximum fov.

It is cheaper, weight less (0,5 kg), less mag and is a good quallity eyepiece. It can be a option for you.

I think your mount can handler the weight of a es 82 30 mm it is just a matter of more to carry. Or am I wrong CN user?