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Best Ranked Eyepiece of the Best Eyepiece Series

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54 replies to this topic

#51 Starman1

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Posted 18 September 2019 - 11:43 AM

I am pretty sure the 25ES100 has different optical prescription (lense count, surface radii) than the others in the 2" *ES100 line.

Well, this is also true of the TeleVue Ethos line, with lens counts from 8 to 10, and the Pentax XW line with lens counts from 6 to 8.

But we still consider them part of a line because they were designed to have similar optical characteristics.

In the case of the 25, many of its parameters (like eye relief) and aberrations are simply an extrapolation of the shorter focal lengths.

Even its weight is a simple extension of the 20mm.

That makes it a part of the family rather than a stand-alone design like the 9mm 120°.



#52 rkelley8493

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Posted 22 September 2019 - 03:43 PM

Well, this is also true of the TeleVue Ethos line, with lens counts from 8 to 10, and the Pentax XW line with lens counts from 6 to 8.

But we still consider them part of a line because they were designed to have similar optical characteristics.

In the case of the 25, many of its parameters (like eye relief) and aberrations are simply an extrapolation of the shorter focal lengths.

Even its weight is a simple extension of the 20mm.

That makes it a part of the family rather than a stand-alone design like the 9mm 120°.

How bout the Ethos-SX 110º.. Is it technically another series of Ethos, similar to the different Nagler Types? And is the 3.7 every bit as good as the 4.7? I was this close [ ] to getting the 3.7, but I went with the 10 because I could use it in both of my scopes. Funny thing is, it hasn't gotten as much use as I thought it would. That could change though as Deep Sky Season is right around the corner.



#53 Starman1

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Posted 22 September 2019 - 06:25 PM

The Ethos SX eyepieces are different internally to other focal lengths.

I guess the SX on the end differentiates them.



#54 j.gardavsky

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Posted 23 September 2019 - 08:08 AM

Low magnifications (f=25mm - 32mm), small AFOV:

Leica  L Plan 32mm

Leica HC Plan S 25mm

 

Medium magnifications (f=22mm - 11mm), wide (ultrawide) AFOV:

Leica B WW and B Televid series (discontinued)

Zeiss B WW Diascope series

Pentax SMC O-18 (discontinued)

Carl Zeiss Jena 16-O export version (discontinued)

DOCTER 12.5 mm

 

High magnifications, wide AFOV:

Pentax SMC XW 10

Pentax SMC XW 7

 

High magnifications (f=9mm - 6mm), small AFOV:

Pentax SMC O-9 (discontinued)

Pentax SMC O-7 (discontinued)

Pentax SMC O-6 (discontinued)

 

Maximum magnifications and beyond:

Pentax SMC XW 3.5

Pentax SMC XO 2.5 (discontinued)

 

Zooms:

Leica 25x - 50x WW Asp., eventually on the Baader VIP Barlow

Tele Vue Nagler Zoom 3mm - 6mm

 

Half of them might be enough, but I can't part with some,

JG


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#55 russell23

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Posted 06 October 2019 - 10:02 AM

Out of all the great eyepiece series currently in the market [Ethos, Pentax XW, Delos, ES 100°, etc], which eyepiece ranks #1 out of each series? 

 

For Explore Sci 100° - I rank the 14mm as the best

Explore Sci 92° - 12mm

Delos - 8mm

Pentax XW - Tied between the 7mm & 10mm

Ethos - I don't know, haven't tried them all, but I really like the 4.7- SX

 

What are some of the other great series' standouts? Which do you rank #1 out of those mentioned?

Forcing myself to pick just one from each line:

 

ES100: 9mm

TV DeLite:  18.2mm

TV Delos:  14mm

Pentax XW:  7mm

Nikon NAV SW:  10mm

TV Panoptic:  35mm

ES68:  28mm

ES62: 32mm

ES52: 6.5mm

Baader Morpheus:  This one is very tough between the 9mm and the 6.5mm ... picking one ... Uhhhhh .... okaaay .... 6.5mm

Meade UWA:  5.5mm

ES82:  6.7mm

Brandon: 24mm

Olivon 70: 22mm


Edited by russell23, 06 October 2019 - 10:04 AM.

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