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Classic TeleVue 55mm Plössl

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#1 PKDfan

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Posted 18 October 2021 - 07:42 PM

Hi all! I have a chance to get an old, pristine, and I must admit beautiful smoothside TV 55mm Plössl and see it has a whopping 38mm eye relief.

How difficult is it to hold the exit pupil?

How good an image will it provide at F/9?

Is it a flat field design, that is will it only reveal the inherent field curvature of the F/9 lens?

Thanks for any insight you might provide as I would like to replace my 38mm SWA for this larger exit pupil tool.
I have reached the point where its outerfield astigmatism hurts my eye. Lol.




Clear skies & Good seeing
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#2 CHASLX200

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Posted 18 October 2021 - 07:54 PM

I loved mine with SCT's. I held the image fine. This was a long time ago. I don't remember it being bad near the field edge with slow scopes. Not something i would use at F/5.


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#3 TOMDEY

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Posted 18 October 2021 - 08:06 PM

It should perform woderfully at a good F/9 feed. I have the TV 55mm and very happy with it. Your exit pupil will be ~6mm.    Tom


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#4 MisterDan

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Posted 18 October 2021 - 09:31 PM

Don's idea:

 

https://www.cloudyni...ent/?p=10811957

 

Not high tech, but easy, effective, and very inexpensive.

 

Congratulations on your new classic!  You'll enjoy it, no doubt.

 

Best wishes.

Dan


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#5 25585

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Posted 19 October 2021 - 08:13 AM

I have a grip & cup 55mm, but it still has the smooth nose. Its my oldest most-treasured TV eyepiece bought new in 1990, also my first 2".


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#6 PKDfan

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Posted 19 October 2021 - 07:21 PM

Thanks for the replies!

I have not yet purchased it but seriously thinking of doing so later today.

I have my scope with me so I will give it a go during daylight hours.

I really like how small it is compared to the newer iterations or the competition.

Just lovely to look at!



Clear skies & Good seeing
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#7 25585

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Posted 20 October 2021 - 06:41 AM

It might be circle-NJ which would make it collectible.



#8 Thomas_M44

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Posted 20 October 2021 - 03:47 PM

Hi all! I have a chance to get an old, pristine, and I must admit beautiful smoothside TV 55mm Plössl and see it has a whopping 38mm eye relief.

How difficult is it to hold the exit pupil?

How good an image will it provide at F/9?

Is it a flat field design, that is will it only reveal the inherent field curvature of the F/9 lens?

Thanks for any insight you might provide as I would like to replace my 38mm SWA for this larger exit pupil tool.
I have reached the point where its outerfield astigmatism hurts my eye. Lol.




Clear skies & Good seeing

That one should be a keeper 

 

Congratulations 


Edited by Thomas_M44, 20 October 2021 - 03:48 PM.

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#9 pweiler

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Posted 20 October 2021 - 09:25 PM

I just sold my 56mm Meade Super Plossl.
It was a great EP and I think a TV 55mm could be even better.
I used the 56 in an f/12 CC scope. the views were flat and sharp.
But due to the large exit pupil for my eyes and using it under Bortle 8 light polluted skies - faint nebula were not there as hoped and other EPs such as 40mm and 30mm produced a darker background with about the same field of view and have a better chance of picking up the faint stuff under my skies. The 56mm from Bortle 5, which I rarely ever get to, worked a lot better - so it may depend on your skies with a similar TV 55mm.

Edit: I would try to find out if anyone else has successfully used a 55/56mm EP in your f/7 scope first. In scopes with secondary at low power, secondary shadow may appear. And other focuser might need a back focuser extension to reach focus.

Edited by pweiler, 20 October 2021 - 09:31 PM.

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#10 CHASLX200

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Posted 21 October 2021 - 06:15 AM

I liked the older Meade 56mm as well. 


Edited by CHASLX200, 21 October 2021 - 06:15 AM.

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#11 25585

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Posted 21 October 2021 - 10:08 AM

I liked the older Meade 56mm as well. 

Yeah, the Japanese made 5 element. They are collectible too.



#12 CHASLX200

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Posted 21 October 2021 - 06:57 PM

Yeah, the Japanese made 5 element. They are collectible too.

I liked all the smooth side Meade stuff from the 1980's. I have a set of the dumbed down versions of Super plossl's and they don't come close.


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