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2019 Eyepiece Buyer's Guide

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#101 25585

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Posted 26 February 2020 - 08:13 AM

What new lines came out in 2019?



#102 Starman1

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Posted 27 February 2020 - 10:25 AM

couple examples: new line from Kasai, new line from OVL.

A couple others I can't remember this moment.

However, seriously, the number of eyepieces will slowly dwindle if the Covid-19 virus becomes a world-wide pandemic and 

countries start closing their borders to Chinese goods. 

If it turns out the virus cannot be easily transmitted on the surfaces of boxes and eyepieces, perhaps not, but I fear the worst.

We will see.


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#103 25585

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Posted 27 February 2020 - 12:55 PM

couple examples: new line from Kasai, new line from OVL.

A couple others I can't remember this moment.

However, seriously, the number of eyepieces will slowly dwindle if the Covid-19 virus becomes a world-wide pandemic and 

countries start closing their borders to Chinese goods. 

If it turns out the virus cannot be easily transmitted on the surfaces of boxes and eyepieces, perhaps not, but I fear the worst.

We will see.

Good point. Production will also be affected, for components if not whole units. Domestic pre-owned markets will benefit though. We survived SARS, Swine Flu etc. though.



#104 daslolo

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Posted 08 March 2020 - 09:24 PM

You don't have zoom eyepieces on your list.

If you put that on Google Sheet, I'll add the eyepieces I've used.



#105 Starman1

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Posted 09 March 2020 - 02:17 PM

Huh?  There are 35-40 different zooms in the list.

What zoom do you have that isn't on the list?

I don't have, and won't have, on the list, spotting scope-specific zoom eyepieces that require special adapters to use in telescopes.



#106 daslolo

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Posted 09 March 2020 - 03:13 PM

Huh?  There are 35-40 different zooms in the list.

What zoom do you have that isn't on the list?

I don't have, and won't have, on the list, spotting scope-specific zoom eyepieces that require special adapters to use in telescopes.

None, I just found the meade 4000 after sorting by type.

 

Its weight is 206g

 

Your xl is now on google sheet! https://bit.ly/2W0fRU6

If you want ownership, pm me your email address and I'll transfer over.

In any case you can replace the formula for field stop with this mouthful, it'll remove error and handle zoom eyepieces:

 

=IFERROR(CONCATENATE(TEXT(index(SPLIT(F1144, "-"),0,1)*index(SPLIT(D1144,"-"),0,1)/57.296,"0.0"), IFERROR(CONCATENATE("-",TEXT(index(SPLIT(F1144, "-"),0,2)*index(SPLIT(D1144,"-"),0,2)/57.296,"0.0"))),""))



#107 Starman1

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Posted 09 March 2020 - 03:51 PM

My version of Excel says that isn't a valid formula.

Also, the field stop of a typical zoom is not uniform over the focal length range, so a calculation would have to vary.

 

There is no ownership and you are free to borrow as needed.



#108 GrayRonk

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Posted 13 March 2020 - 09:10 PM

Don, the list states that the AMP XWA HDC 100° has a 7mm coming. Any idea when that will be?

 

Oh, and thanks for the list!


Edited by GrayRonk, 13 March 2020 - 09:11 PM.


#109 Dirtydrywaller

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Posted 13 March 2020 - 09:16 PM

Thank you!  This is extremely helpful for noobs. :)  


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#110 Starman1

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Posted 14 March 2020 - 12:52 AM

Don, the list states that the AMP XWA HDC 100° has a 7mm coming. Any idea when that will be?

Oh, and thanks for the list!

KUO says that they need to recoup some profits before they introduce more focal lengths so I wouldn't look for a 7mm this year. It might be a while before we even see more 20s thanks to the Covid19 virus.
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#111 eblanken

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Posted 27 March 2020 - 10:43 PM

I just want to add my thanks to Don for this very valuable eyepiece guide!

+1 on the thanks to Don !!!



#112 Starman1

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Posted 28 March 2020 - 12:06 PM

I'll post the 2020 version in a couple weeks.




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