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Are Meade Super Plossls Parafocal?

Eyepieces
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#1 vtornado

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Posted 20 October 2021 - 04:46 PM

I have seen references to the fact that Meade Super Plossl Eyepieces are parafocal.

 

During planetary/lunar viewing I switch eyepieces a lot and I am getting a little tired of

refocusing.  It is a distraction.

 

 I have seen some references here that sets of Meade Super Plossls are parafocal.

 

1st is this true?

 

2nd if it is not perfectly parafocal that is ok, I can do a little touch up.  I just dont want

to do big cranks of the focuser.

 

The Japanese 5 elements are off the table too expensive for me.

 

Then there are the Japanese 4,  Taiwanese? 4, and Chinese 4.

In my reading Japanese have their barrel stamped Japan.

Taiwanese are yellow lettering no country stamp.

Chinese are white letters.

 

I think for the biggest bang for my buck I want to get a set of Taiwanese ones.

Are these parafocal?  

If I can't find a whole set intact, if I buy different lots of these within the same category, will they be

more or less parafocal?

 

======= thinking outside of the  box =====

Is there another line of good, budget plossls that are parafocal?

I have two televue plossls (8, and 11) that are, but building a whole set would be expensive.

 

Smart astronomy???  Out of production and some are hard to find.

Celestron???  Halloween?

Orion high light???   

 

And once again if I have to buy piece meal as long as I buy the same category

will they be parafocal if that is a feature to begin with? Or do I have to purchase as a set

to ensure that?

 

======= out of the box 2 =========

someone will say buy a zoom.  While that is good advice I have the celestron

and so far it is not quite as sharp as my fixed focal lengths, and it does

not do well in the upper band of focal lengths due to decreasing AFOV.

 

I do use it when I am too lazy to bring out the eyepiece case,

or switch eyepieces. 


Edited by vtornado, 20 October 2021 - 04:52 PM.


#2 SeattleScott

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Posted 20 October 2021 - 05:48 PM

Yes, Meade Plossl should be parfocal, assuming you stay within the same generation at least. Most name brand Plossl sets are parfocal.

Scott
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#3 LDW47

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Posted 21 October 2021 - 05:35 PM

I hear they aren't



#4 DirtyRod

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Posted 21 October 2021 - 08:11 PM

My 4000s are definitely not. 


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#5 vtornado

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Posted 21 October 2021 - 08:35 PM

My 4000s are definitely not. 

Are they white lettered? yellow lettered?

 

BTW sorry I misspelled parfocal.


Edited by vtornado, 21 October 2021 - 10:00 PM.


#6 DirtyRod

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Posted 22 October 2021 - 12:51 AM

Are they white lettered? yellow lettered?

 

BTW sorry I misspelled parfocal.

Yellow. I use some Chinese made 20mm - 40mm plus I have one older Japan made UWA 6.7mm and I did own a 15 mm white lettered Super Plossl and none of them are parfocal to each other.



#7 davidgmd

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Posted 22 October 2021 - 05:49 AM

Would parfocalizing rings work with your existing eyepieces?

https://farpointastr...-inch-eyepieces


Edited by darkandstormynight, 22 October 2021 - 05:50 AM.

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#8 eyespy

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Posted 22 October 2021 - 07:54 AM

Hi,

 

I have two full sets and even some ‘older’ version ones and although none are exactly parfocal, they are close enough not to be an issue as I usually fine tune focus between eyepiece changes regardless.

 

Doug.....


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#9 vtornado

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Posted 24 October 2021 - 02:03 PM

Would parfocalizing rings work with your existing eyepieces?

https://farpointastr...-inch-eyepieces

Maybe ... thinking about this option




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