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Best DeLite for a 10" f/4.9

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#1 Tangerman

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Posted 09 May 2021 - 09:48 AM

On Friday night, I was at a dark site, enjoying myself immensely on a camping trip with my wife and our telescope. I've only bought cheap eyepieces, and while I have more comfortable eyepieces with larger fields of view that I use more often, I noticed my 9mm Plossl that came with my telescope is still the sharpest one I have. I'm not opposed to any of the eyepieces in my collection, and I don't have any magnification gap. So, if you could only get one DeLite eyepiece (please don't try to convince me to go for another eyepiece line, it'll be years before I'm willing to buy a 31mm Nagler or any Ethos eyepieces), which one would you choose for a 10", 1250 mm focal length telescope? 

Of course, you probably need to know what I like viewing too. I'm most interested in deep-sky objects, and I am willing to travel to my dark site frequently. But I've also learned that Atlanta has really good seeing, so I'll also be doing lots of planetary viewing, which works great from the city. Thanks y'all.



#2 SeattleScott

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Posted 09 May 2021 - 09:52 AM

I would go 11mm for general purpose DSO viewing.

Scott
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#3 eyeoftexas

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Posted 09 May 2021 - 09:59 AM

My Orion (12") has similar specs as your AD10, and I find my ES 13mm is my go-to eyepiece for DSO viewing (good exit pupil, adequate magnification, wide field for finding objects).  I thus second the recommendation of the 11mm for yours.  I have the 11mm, but am not enamored with the narrow FOV or long eye relief (I don't wear glasses when viewing).  But, it is a fine eyepiece, and you will not go wrong if this is your route of choice.


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#4 Javier1978

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Posted 09 May 2021 - 10:01 AM

I love my 18,2 mm DeLite for general Deep Sky viewing on my f6 dob. It is a stunning little eyepiece. All DeLites are great eyepieces, though.

 

I think the question is what exit pupil do you enjoy the most for general DSOs. I prefer it to be between 3 and 4 mm.


Edited by Javier1978, 09 May 2021 - 10:02 AM.


#5 Mike W

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Posted 09 May 2021 - 12:58 PM

14 Delos!



#6 SeattleScott

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Posted 09 May 2021 - 01:15 PM

14 Delos!

Now now he insists that we don’t mention any other lines. He has his mind made up on Delite, whatever his reasons. One could certainly do worse.

Scott
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#7 russell23

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Posted 09 May 2021 - 02:53 PM

I would go with the 13mm. It will give you 96x and a 2.6mm exit pupil. Great all around view. The 13mm is my favorite DeLite. The 18.2mm is just as good.
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#8 TayM57

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Posted 09 May 2021 - 03:13 PM

whatever his reasons.

Likely a preference for the combination of the 62 FOV and ER. 



#9 eyeoftexas

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Posted 09 May 2021 - 03:25 PM

Likely a preference for the combination of the 62 FOV and ER. 

and price.


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#10 Kutno

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Posted 09 May 2021 - 05:33 PM

7mm DeLite.  Will be useful for lunar and planetary at 179x in your scope.  Finest quality image in that focal length.


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#11 Dave Bush

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Posted 09 May 2021 - 06:15 PM

DeLite's are super excellent for sure but with only a 62º AFOV, unless your scope is driven, you should probably keep away from higher powers (I'd say 13mm or longer).  At higher powers the objects will moved across and out of the field too quickly.  Too much manual bump and push.


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#12 Dave McCrary

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Posted 09 May 2021 - 06:17 PM

I 2nd the 11mm. I have the18.2,15, 11, 9,7,and 5 and like them all. I believe I use the 11mm the most .

Dave


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#13 Dave McCrary

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Posted 09 May 2021 - 06:19 PM

I have the 10 inch Apetura also.

Dave



#14 Tangerman

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Posted 09 May 2021 - 07:02 PM

and price.

Mostly the price for sure. I've heard the clarity of a DeLite is superb, and I don't mind the field of view of my current eyepieces, which is in the same range. So I'm looking for the best image in that price range, not the best field of view. 

 

DeLite's are super excellent for sure but with only a 62º AFOV, unless your scope is driven, you should probably keep away from higher powers (I'd say 13mm or longer).  At higher powers the objects will moved across and out of the field too quickly.  Too much manual bump and push.

I've been bumping and pushing my scope for about a year and a half, and I'll happily do so with my 6mm barlowed to 3mm with a 66 degree AFOV. Additionally, I do plan on getting an equatorial platform (haven't decided if I'll upgrade eyepieces or get an equatorial platform first), so there will be much less manual adjustment in the future. 



#15 GeneT

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Posted 09 May 2021 - 07:25 PM

I would go 11mm for general purpose DSO viewing.

Scott

I would add the 14, 8, and 6 Delos or Delites for general purpose viewing. 



#16 jeffmac

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Posted 09 May 2021 - 09:21 PM

I like Kutno's suggestion of the 7mm for planets. Your post presents somewhat of a quandary, though. While the 7mm is a logical choice for the planets, a longer focal length, say the 15mm or 18.2mm would be more versatile for deep sky. I have the 15 and the 18.2 and they are both great. With my 10" f5 dob, I find myself using the 15mm more for deep sky.
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#17 Tropobob

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Posted 09 May 2021 - 10:52 PM

11mm will give a good, medium power that is very useful for most objects.  



#18 river-z

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Posted 09 May 2021 - 11:37 PM

I love using Delites in my 12" Dob.  I have a 11mm and 15mm which work great for DSO viewing.  Hard to pick one since DSO's vary in size and I usually pick the eyepiece that best frames the object.  Since I do wear glasses the good eye relief is really nice.



#19 Voyager 3

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Posted 10 May 2021 - 01:05 AM

11mm for general purpose and 7mm for details like galactic arms , resolution for Globulars and planets when seeing is so-so . But I would think if only one , I would split them and get a 9mm . It gives enough magnification, at the same time giving a bright enough image in 1.8mm exit pupil .



#20 25585

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Posted 10 May 2021 - 01:29 AM

I like Kutno's suggestion of the 7mm for planets. Your post presents somewhat of a quandary, though. While the 7mm is a logical choice for the planets, a longer focal length, say the 15mm or 18.2mm would be more versatile for deep sky. I have the 15 and the 18.2 and they are both great. With my 10" f5 dob, I find myself using the 15mm more for deep sky.

2x Barlow with them will give the shorter FL equivalents.


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#21 HellsKitchen

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Posted 10 May 2021 - 03:15 AM

If you want to do both planetary and DSO viewing, it is hard to recommend a single focal length. For planetary, a 7mm @179x is a good start, and many DSOs such as globulars, small nebulae, and galaxies look good at that magnification, while larger objects such as M42 will show detail that lower powers might miss. If you enjoy globulars in particular, a 7mm is a better option than any higher focal length. A 13mm would make a good compliment for larger DSOs and framing. Really, the spectrum of objects you want to view is too broad for a single focal length. 

 

If you must only have one, I'd be leaning towards a 7mm since you say you want to do planetary. That is where the Delite shines, lunar/planetary and fine details. You could split the difference and get say a 9mm, but to me that is getting too low for planetary. If your seeing is good, you need to take advantage of it. 


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#22 CeleNoptic

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Posted 10 May 2021 - 03:42 AM

If you can have only one looks like the best option would be to get the 13mm Delite and a decent 2x Barlow or extender for 6.5mm (barlowed) for planetary/lunar, IMO.


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#23 Tangerman

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Posted 10 May 2021 - 06:20 AM

Thanks for all the replies, everyone. I'll probably end up going for a 7mm first, simply because I anticipate more planetary viewing than DSO viewing as long as I live in Atlanta. Then it sounds like the 11mm, then 18.2mm would be good additions down the road. 


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#24 Voyager 3

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Posted 10 May 2021 - 06:54 AM

Thanks for all the replies, everyone. I'll probably end up going for a 7mm first, simply because I anticipate more planetary viewing than DSO viewing as long as I live in Atlanta. Then it sounds like the 11mm, then 18.2mm would be good additions down the road. 

If your seeing is good , adding a 5mm DeLite and a Barlow/Powermate will be your lunar/Planetary/double star nirvana ..



#25 kklei940

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Posted 10 May 2021 - 09:15 AM

I bet the 7mm would be a nice higher power eyepiece for you. When you're ready to focus more on DSO's then I would look at starting with the 11mm DeLite. I've been very impressed with what that eyepiece shows me in the fast reflectors I've had so far.




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