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2018 Eyepiece Buyer's Guide

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36 replies to this topic

#26 Procyon

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Posted 14 July 2018 - 07:58 PM

Thanks for not adding those ebay eyepieces Don. Ordered an SVbony illuminated one for aligning only, while it does the job the quality is horrendous.

#27 M11Mike

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Posted 19 July 2018 - 10:16 PM

Don - fantastic ---- you're the BEST.  What an asset to CN's and the hobby.

 

Thanks - Mike P (Ballston Lake, NY)



#28 Seniorgabbo

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Posted 22 July 2018 - 07:13 AM

Thank you for this!

#29 Starman1

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Posted 22 July 2018 - 03:40 PM

Anyone who has problems with fields populating after downloading, send me your email in a private message, and I'll send you my copy.

Don



#30 25585

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Posted 26 September 2018 - 02:11 PM

Just adding the link to my thread asking which eps, apart from Tele Vue, take Tele Vue Dioptrx lenses, which Don kindly answered https://www.cloudyni...dioptrx-lenses/

 

 



#31 PGM

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Posted 23 November 2018 - 05:53 PM

Very helpful tool. Thanks!


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#32 GNL

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Posted 28 November 2018 - 02:09 PM

For eyepieces as of about yr 2000, including some no longer in production (and therefore not in the 2018 Eyepiece Buyer's Guide [at https://www.cloudyni...tach_id=1032999 , if I've done this correctly] ), there's a nice compilation of specifications at  https://klhess.com/telescope-eyepiece-specifications/ .


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#33 Procyon

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Posted 28 November 2018 - 03:31 PM

For eyepieces as of about yr 2000, including some no longer in production (and therefore not in the 2018 Eyepiece Buyer's Guide [at https://www.cloudyni...tach_id=1032999 , if I've done this correctly] ), there's a nice compilation of specifications at https://klhess.com/t...specifications/ .


Cool! Thanks for doing this. If you want add the 18mm TV Radian also. :)

#34 karstenkoch

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Posted 09 March 2019 - 02:11 PM

Here's a chart I made in Excel using the data from Don's guide. It plots Apparent FOV (AFOV) vs focal length and then adds a bubble at each point. The diameter of the bubble is scaled to represent the Relative Total FOV (TFOV). To calculate Relative TFOV, I used the approximation of AFOV x focal length. The bubbles are transparent, so a darker color means that more eyepieces are stacked up at that spot. You can see that there are a lot of plossls at 50 degrees and 32 mm.

 

Eyepieces Relative TFOV Chart.png


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#35 Starman1

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Posted 09 March 2019 - 03:45 PM

I am not sure what certain eyepieces have, in terms of apparent field because the manufacturers do not state, but I think the Siebert monocentrics are about 30°,

so contemporary eyepieces go from 1.6mm to >100mm and from 30° to 120°.

I don't think there has ever been a period in my life with such a wide variety available.

The number of eyepieces available reached a peak around 2004-2009 and declined after that, but the selection is broader now.

 

P.S. I'm working on the 2019 version now. 


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#36 25585

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Posted 15 March 2019 - 07:10 PM

These last few years have been, and still are the best for whole ranges benefiting glasses wearers wanting wide fields of view with quality optics.

 

Not that long ago, Pentax XL/W, Vixen LVW were about all. Now Delos, Delite, Morpheus, ES92, Orion LHD at least cater for long eye relief requirements. Its a good time, and very welcome!


Edited by 25585, 15 March 2019 - 07:12 PM.

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#37 Mike W

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Posted 19 March 2019 - 10:35 PM

Can't wait for the 2019!




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