Mark Ansell
loonaddict
Hello, does anyone know the thread size of the ring that surronds the eyepiece socket on a Kowa TSN4?
Mark Ansell
Mark Ansell
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Kowa TSN4 thread size? (1 Viewer)
- Thread starter Mark Ansell
- Start date
Yelvertoft
Rabbit Fan
Hi,
I have a TS-601 (similar vintage to the TSN-4), I have measured the thread at the base of my eyepice as 41mm x 0.75mm pitch. The "genuine" Kowa digiscoping adaptor fits this thread on my scope. Don't know for certain that the TSN series has the same thread but if it measures 41mm across the peaks of the threads it's a fair bet that it is.
Hope this helps.
Duncan.
I have a TS-601 (similar vintage to the TSN-4), I have measured the thread at the base of my eyepice as 41mm x 0.75mm pitch. The "genuine" Kowa digiscoping adaptor fits this thread on my scope. Don't know for certain that the TSN series has the same thread but if it measures 41mm across the peaks of the threads it's a fair bet that it is.
Hope this helps.
Duncan.
Andrew Rowlands
Well-known member
Duncan,
41mm sounds right for the TSN range; was quite dissapointed that 42mm extension tubes were a fraction too big for my 'scope - would have made a very cheap camera adapter! Perhaps there is an adapter for 42mm down to 41mm?
T2 mount + 42mm extension tubes + 42mm-41mm converter = @£30-40 - bargain!
Andy.
41mm sounds right for the TSN range; was quite dissapointed that 42mm extension tubes were a fraction too big for my 'scope - would have made a very cheap camera adapter! Perhaps there is an adapter for 42mm down to 41mm?
T2 mount + 42mm extension tubes + 42mm-41mm converter = @£30-40 - bargain!
Andy.
Mark Ansell
loonaddict
Yelvertoft said:
Thanks for the info. I was all prepared to purchase the Kowa digiscoping adapter but now feel that I want to improve my scope anyway, probably the Zeiss 85. Currently I'm using a 25x eyepiece with a Scopetronix adapter for astronomical eyepieces that seems to work well. THere is just enough of a ring in the eyepiece for the set screws on the adapter to work to keep it all in place.I was coming up with about 41.5 but then thought "why would anybody make such a size??"
Thx
Yelvertoft
Rabbit Fan
Mark Ansell said:
"Standard" sizes are 40.5mm and 42mm. I'm getting a friend with a lathe to make me an adaptor as there's no way I'm paying the huge sum for the "genuine" item. You could try contacting a small local engineering shop or a local "model engineering" society to get a custom adaptor made. I'm sure the cost would still be far less than the Kowa item(s) and a lot cheaper than a Zeiss 85, which would still require an adaptor buying on top.
Regards,
Duncan.
Timedrifter
Well-known member
Yelvertoft said:
Hi Duncan! I'm not sure what you mean by 'Standard' sizes? Are you talking about standard thread sizes in general, or are you referring specifically to Kowa sizes?