Join for FREE
It only takes a minute!
More discoveries. NEW: Zeiss Victory SF 32

Welcome to BirdForum.
BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

Astro adapter for TSN1-4?

Reply
 
Thread Tools Rate Thread
Old Tuesday 30th June 2020, 14:03   #1
yves0071
Registered User

 
Join Date: May 2010
Location: Toulouse
Posts: 349
Astro adapter for TSN1-4?

Hi,
Is there any astro adapter (31.75mm) available for Kowa TSN1-4 scopes (instead of the eyepiece, using external thread).
Thansk in advance for yoru help.
Regards
Yves
__________________
---BF Member since May 2010---
yves0071 is offline  
Reply With Quote
Old Tuesday 30th June 2020, 18:54   #2
jring
Registered User

 
Join Date: Aug 2015
Location: Germany
Posts: 2,489
Hi Yves,

since the inner diameter of the small body bayonet mount is less than 31.75mm, there is no way to adapt without either changing the bayonet mount or get rid of the 1.25" tube on the astro EPs. But this of course means that it really has to be an empty tube and not some barlow lens in there as is often the case with modern short focal length astro EPs in order to gain some eye relief.

And also the adaption is usually for one EP only or maybe one series...

Also even if there is nothing in the tube, one should be careful that the tube does not hold the innards of the EP together... some owners of older Televue EPs have had a nice puzzle of optical elements to put back together (or rather have a Televue technician do it) after removing the tube while pointing down...

PS: Baader Planetarium does offer an adapter to mount their Hyperion zoom Mk IV to the small body scopes - although I guess w/o any assurance that it'll actually come to focus or physically fit in all small body scopes...

Joachim
jring is offline  
Reply With Quote
Old Wednesday 1st July 2020, 05:08   #3
yves0071
Registered User

 
Join Date: May 2010
Location: Toulouse
Posts: 349
Thanks Joachim.
__________________
---BF Member since May 2010---
yves0071 is offline  
Reply With Quote
Old Thursday 2nd July 2020, 19:55   #4
mayoayo
Registered User
 
mayoayo's Avatar

 
Join Date: Nov 2004
Location: El Garraf
Posts: 2,280
I forgot If they have an inner thread as well, like the 820 series.. That would make easier to make and fit an adapter for a particular astro eyepiece.. The Baader adapter is of course to fit the tsn1 thread and convert to the hyperion collar, that might be 51 or 52 mm(forgot exact measurement)
mayoayo is offline  
Reply With Quote
Old Friday 3rd July 2020, 06:07   #5
yves0071
Registered User

 
Join Date: May 2010
Location: Toulouse
Posts: 349
Hi,
No, there is no inner thread on TSN2 :(
This is for adapting a binoviewer.
Regards
Yves
__________________
---BF Member since May 2010---
yves0071 is offline  
Reply With Quote
Old Friday 3rd July 2020, 07:13   #6
jring
Registered User

 
Join Date: Aug 2015
Location: Germany
Posts: 2,489
Quote:
Originally Posted by yves0071 View Post
Hi,
No, there is no inner thread on TSN2 :(
This is for adapting a binoviewer.
Regards
Yves
Hi Yves,

a binoviewer is a no-go anyways due to lack of backfocus - you will certainly need a glass path corrector which also corrects the backfocus problem like this one.

https://www.365astronomy.com/TS-Opti...-TSGWK161.html

With that adapted you also have sth to take the 1.25" tube of the binoviewer.

On the flip side, most of these increase the magnification a bit... so super wide true fields are not going to happen.

Joachim
jring is offline  
Reply With Quote
Old Sunday 5th July 2020, 04:40   #7
yves0071
Registered User

 
Join Date: May 2010
Location: Toulouse
Posts: 349
Thanks to all fo you!
Yves
__________________
---BF Member since May 2010---
yves0071 is offline  
Reply With Quote
Advertisement
Reply


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Astro-Adapter for ATM/ATS or STM/STS Tringa45 Swarovski 4 Wednesday 8th May 2019 17:29
Swarovski Astro Adapter Sancho Swarovski 38 Tuesday 21st August 2012 15:59
Zen Ray Astro Adapter ??? gcole Spotting Scopes & tripod/heads 26 Wednesday 23rd November 2011 12:10

{googleads}

Fatbirder's Top 1000 Birding Websites

Help support BirdForum

Page generated in 0.17300701 seconds with 20 queries
All times are GMT. The time now is 02:02.