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Just bought an Apertura AD8, looking for an EP.

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18 replies to this topic

#1 brybell

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Posted 19 March 2019 - 01:51 AM

You can see in my signature what I currently have. I have about $200 I can spend on an EP. What would you recommend?


Edited by brybell, 19 March 2019 - 01:38 PM.


#2 Jond105

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Posted 19 March 2019 - 01:55 AM

16-14mm range eyepiece. Maybe a replacement for the 9 in a 10-8mm range with a little wider view. That’s my suggestion. As to brand, there are so many at so many different prices. At f/6 I could see you being ok with a variety of different eyepieces. 

 

 

Edit: Looking at your gear you have what I may believe to be the 2” Barlow. With that you have a wide variety of ranges covered. Maybe save some more money and see how all that works out for you. Then decide. Not sure how long you’ve been using all that gear yet. 


Edited by Jond105, 19 March 2019 - 01:58 AM.

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#3 Astro-Master

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Posted 19 March 2019 - 02:50 AM

I would borrow a 9mm 100* eyepiece at a star party and see what you think.  If you like the wide field view sell your 9mm Plossl and buy the APM / LUNT Hyperwide 9mm 100* eyepiece from EyepiecesEct.com for $249.


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#4 wrnchhead

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Posted 19 March 2019 - 05:48 AM

I agree with replacing the 9mm. I have your exact same scope and I found that 9mm to be virtually useless. 

 

My personal intent is to save up a little and get a Baader zoom. 


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#5 BradFran

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Posted 19 March 2019 - 06:02 AM

Don't be afraid to buy used from the classifieds in order to stretch your dollar. Things like the 10mm Delos for sale at the moment can often be resold for the same price if you change your mind later. Also, if you can make a star party, you can try before you buy so to speak.


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#6 CrazyPanda

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Posted 19 March 2019 - 06:31 AM

I agree with replacing the 9mm with something in the 9-10mm range. 9mm is actually a good general purpose focal length for that scope. The exit pupil is still bright enough for many of the medium DSOs, and the 133x magnification is enough for planetary viewing when the atmosphere can't support higher magnifications. The only issue with the plossl is the very tight eye relief and narrow field of view. 

 

Over 99% of DSOs will fit within a 0.5 degree FOV, so if you got a nice wide angle eyepiece in the 9mm range, you would be able to frame virtually every object in the sky nicely, while giving them decent magnification. 


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#7 Don Alvarez

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Posted 19 March 2019 - 01:35 PM

https://www.bhphotov...5000_Ultra.html

 

 


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#8 brybell

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Posted 19 March 2019 - 01:38 PM

I agree with replacing the 9mm with something in the 9-10mm range. 9mm is actually a good general purpose focal length for that scope. The exit pupil is still bright enough for many of the medium DSOs, and the 133x magnification is enough for planetary viewing when the atmosphere can't support higher magnifications. The only issue with the plossl is the very tight eye relief and narrow field of view. 

 

Over 99% of DSOs will fit within a 0.5 degree FOV, so if you got a nice wide angle eyepiece in the 9mm range, you would be able to frame virtually every object in the sky nicely, while giving them decent magnification. 

Thanks! How would the 8.8mm 82 degree Explore Scientific be?



#9 brybell

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Posted 19 March 2019 - 01:41 PM

Thanks! This looks pretty much exactly like the ES one but for about $80 cheaper...



#10 havasman

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Posted 19 March 2019 - 01:46 PM

APM HDC 9mm (or 13mm depending on your local conditions and observing habits)


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#11 Jond105

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Posted 19 March 2019 - 03:07 PM

Thanks! How would the 8.8mm 82 degree Explore Scientific be?

It’s a great eyepiece, but you may want to check out that 9mm APM if you get the chance. 



#12 NorthernlatAK

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Posted 19 March 2019 - 03:12 PM

There's a 9mm t1 nagler in classifieds right now for cheap. I have one and love it...

#13 CeleNoptic

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Posted 20 March 2019 - 09:26 AM


Thanks! This looks pretty much exactly like the ES one but for about $80 cheaper...

 

Focus Camera sells it on Amazon at $105 now. Although, you can buy used here in CNC at ~$95.



#14 CeleNoptic

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Posted 20 March 2019 - 09:41 AM

For f/6 Dob a combination of 16mm (e.g. Nagler T5 or ES68) and 11mm (ES82 or Nagler T6) will be what you need for most DSOs unless you prefer 100*AFOV. If you go used and don't care about short eye relief you can buy the 16mm ES68 and 11mm ES82 under ~$250 both optically excellent, much better than Gold Line (=Orion Expanse/Agena EWA) you have.



#15 rowdy388

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Posted 20 March 2019 - 09:48 AM

APM HDC 13mm or Morpheus 12.5mm


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#16 pr1nc3prince

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Posted 17 April 2019 - 03:56 AM

APM HDC 9mm (or 13mm depending on your local conditions and observing habits)

Sorry, total newbie here.

What would be effect of the 9mm vs 13mm? Thanks

Sent from my ASUS_X00DDA using Tapatalk

#17 havasman

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Posted 17 April 2019 - 05:17 AM

Sorry, total newbie here.

What would be effect of the 9mm vs 13mm? Thanks

Sent from my ASUS_X00DDA using Tapatalk

9mm yields a bit higher magnification, a bit narrower field. It might be more useful if you have a good enough location to do good observing of galaxies and planetary nebulae. The 13mm might serve better if you observe more open clusters and extended emission nebulae.

Either will work wonderfully, are top line eyepieces and will likely become all you will use on most nights with your 8".



#18 pr1nc3prince

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Posted 17 April 2019 - 12:19 PM

9mm yields a bit higher magnification, a bit narrower field. It might be more useful if you have a good enough location to do good observing of galaxies and planetary nebulae. The 13mm might serve better if you observe more open clusters and extended emission nebulae.
Either will work wonderfully, are top line eyepieces and will likely become all you will use on most nights with your 8".

Ahhh, now I get it.

It depends on the darkness of the sky, and what types I want to see. Thanks a bunch!

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#19 havasman

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Posted 17 April 2019 - 04:02 PM

Yes indeed. Conditions and chosen observation factor in almost every decision you will make as a visual amateur astronomer; certainly all the gear choices.


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