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Highest contrast WF eyepieces in the 20mm - 30mm

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#1 JMorey

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Posted 24 January 2013 - 07:47 PM

Hi,

I would like to hear your suggestions and opinions on the highest contrast wide field eyepieces in the 20mm to 30mm range. 1.25", or 2" eyepieces. Vintage, or new. Thanks for your help, and clear skies!

Best,
Joe

"I am just trying to optimize my moments under the night sky"

#2 Magnitude7

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Posted 24 January 2013 - 09:24 PM

Hey Joe. A 21mm Denkmeier is my choice. Not only does it deliver very high contrast, but it is also a comfortable eyepiece to look through.

In addition, it is very light (8 oz), and it is also the most Barlow-friendly eyepiece I have ever tried. Seriously.

#3 JMorey

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Posted 24 January 2013 - 09:53 PM

Hi, there. The 21mm Denkmeier sounds like a great choice. What is its apparent field of view, and eye relief? Are these still available for sale, and where can I buy one? I don't normally barlow eyepieces as a general rule, but I would definitely give it try. Thanks very much for your input!

Best,
Joe

#4 daniel_h

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Posted 25 January 2013 - 04:40 AM

Er is 20mm, fov 60-65, Denk still sell them

#5 Erik Bakker

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Posted 25 January 2013 - 04:53 AM

Hi Joe,

The TV 22mm T4 Nagler comes to mind. It really is a great eyepiece. Sharp, contrasty, very immersive and just a plain comfortable view to take in.

#6 coutleef

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Posted 25 January 2013 - 09:58 AM

Hi,

I would like to hear your suggestions and opinions on the highest contrast wide field eyepieces in the 20mm to 30mm range. 1.25", or 2" eyepieces. Vintage, or new. Thanks for your help, and clear skies!

Best,
Joe

"I am just trying to optimize my moments under the night sky"


of all the EPs i owned in that range including orthos, panoptics, naglers, plossls, the ones with the best contrast are the pentax 20 and 30 XW.

i have never looked through a brandon or an ethos 20mm however

#7 Damo636

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Posted 25 January 2013 - 10:03 AM

I find the Ethos 21 shows excellent contrast.

#8 Magnitude7

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Posted 25 January 2013 - 10:18 AM

The 21mm Denkmeier sounds like a great choice. What is its apparent field of view, and eye relief? Joe

Eye Relief is 20mm - more with a Barlow. The AFOV definitely feels less than 65°. But I have done drift measurements, and it really does work out to 65°, IF the eyepiece is really 21mm. I strongly suspect the focal length is really more like 21.5mm, so the AFOV is a little less than 65°.

In any case, looking through either of my Denkmeiers makes me feel like I am looking through a wide-field Brandon.

#9 csrlice12

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Posted 25 January 2013 - 11:17 AM

ES82* 24mm oldstyle, before they waterproofed them. They're beasts alright....and the views are worth it.....

#10 MRNUTTY

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Posted 25 January 2013 - 12:44 PM

of all the EPs i owned in that range including orthos, panoptics, naglers, plossls, the ones with the best contrast are the pentax 20 and 30 XW.


I'm with Frank, the first time I looked into the XW's I almost got sucked into that scrumptious black vacuum of space. It was immediately apparent.

#11 Lance1234

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Posted 25 January 2013 - 01:12 PM

I'm with Frank, the first time I looked into the XW's I almost got sucked into that scrumptious black vacuum of space. It was immediately apparent.

+1 on the XW.

#12 MAURITS

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Posted 25 January 2013 - 01:18 PM

I find the Ethos 21 shows excellent contrast.


+1 :like:

#13 JMorey

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Posted 25 January 2013 - 02:14 PM

Hi Daniel,

Where can I buy this eyepiece? Thanks.

Joe

#14 JMorey

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Posted 25 January 2013 - 02:18 PM

Hi Erik,

I do really like the Televue 22mm Nagler Type 4, but I do have a minor problem with blacking out with which is why I switched to the Televue 20mm Nagler type 5. Thanks for your input!

Best,
Joe

#15 JMorey

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Posted 25 January 2013 - 02:23 PM

Hi Francois,

I agree the Pentax XW eyepieces are amongst the highest contrast wide fields ever made. I just recently bought the 20mm, but I have not used it as of yet. I cannot find the 30mm for sale anywhere, and it's price is astronomical! In it's place I have the Baader 31mm aspheric which is high in contrast, and has an eye relief (I believe) of 18mm. I find ultimate comfort levels between 12mm - 18mm. I do not wear glasses when I observe. Thanks for your input!

Best,
Joe

#16 JMorey

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Posted 25 January 2013 - 02:26 PM

Hi,

I know how nice the Televue 21mm Ethos would be, but the price and weight make it prohibitive for me to use, and especially the price, but thanks for your input.

Best,
Joe

#17 JMorey

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Posted 25 January 2013 - 02:33 PM

Hi,

Thanks for the information on the 21mm Denkmeier. Just out of curiosity has anyone compared it to the Televue 20mm Type 5 eyepiece, or the Vixen 22mm LVW eyepiece? I would appreciate your thoughts.

Best,
Joe

#18 JMorey

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Posted 25 January 2013 - 02:36 PM

Hi,

I have never tried the ES 24mm 68 degree eyepieces, but I do have the Meade 5000 34mm, 28mm, and 24mm eyepieces. They are all great eyepieces, and I believe made by the same company which makes the Explore Scientific eyepieces, but someone can correct me if I am wrong. Thanks!

Joe

#19 JMorey

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Posted 25 January 2013 - 02:40 PM

Hi John, Lance,

I agree with you on the Pentax eyepieces. Fantastic. I have five right now: Pentax 40mm XL, Pentax 20mm, 10mm, 7mm, 5mm XW eyepieces. I might want to pick up the 30mm if I can find it. Anyone have a pristine example they are willing to sell? Thanks!

Joe

#20 JMorey

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Posted 25 January 2013 - 02:50 PM

Hi guys,

I guess I have to come clean: I just bought a Vixen VMC 260L OTA as my grab and go scope, and you know as well as I when you buy a new scope, you have to optimize your eyepieces for that scope, hence, why I want the highest contrast WF eyepieces. With a 3000mm focal length the highest useful magnification on a good night would be a 10mm eyepiece. Here is my current list:

Pentax XW 10mm

Televue 12mm Delos

Televue 16mm Type 5 Nagler

Televue 20mm Type 5 Nagler

ES 24mm 82 degree eyepiece

Baader 31mm Aspheric eyepiece

I know. This is a darn good combination, but I challenge the rest of you to come up with something similar, or a better choice of eyepieces. The 21mm Denkmeier sounds like a great possible choice to make this a better set. I look forward to hearing your thoughts, and thank you! :)

Best,
Joe

#21 Lance1234

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Posted 25 January 2013 - 02:55 PM

I have five right now: Pentax 40mm XL, Pentax 20mm, 10mm, 7mm, 5mm XW eyepieces.

Joe,
Have you compared the 10mm 2X barlowed vs the 5mm?

#22 JMorey

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Posted 25 January 2013 - 03:10 PM

Hi Lance,

No. I usually am not fond of using a barlow. Would this not cause extreme eye relief and black outs? Thanks for your input.

Best,
Joe

#23 Lance1234

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Posted 25 January 2013 - 04:19 PM

I usually am not fond of using a barlow. Would this not cause extreme eye relief and black outs?


Joe,

It would at least place your eye pretty far away from the eye lens (the longer the focal length the worse it gets). It might or might not result in blackouts, depending upon the eyepiece. But you could use a Powermate or Telecentric Barlow which will keep your eye placement the same as the eyepiece alone.

#24 JMorey

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Posted 26 January 2013 - 09:58 AM

Hi Lance,

I will definitely consider trying the Powermate with the 5mm just for the heck of it, but I am afraid that seeing usually does not support 1200x! Perhaps, if I were outside the stratosphere. :jump: Thank you.

Best,
Joe

#25 Lance1234

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Posted 26 January 2013 - 05:10 PM

Joe,

Powermate the 10mm, not the 5mm :grin:. Then, assuming it's a 2X Powermate, compare the Powermated 10mm with the 5mm. If the views look the same, than you can sell the 5mm and buy a new toy!






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