Galaxyhunter
Pooh-Bah
Reged: 01/02/06
Posts: 1257
|
|
I'm making a new 2" adaptor for my camera. I was wondering what is the thread count for 2"(48mm) filters? 
--------------------
Carl
My lousy skies at Hawkeye Observatory
|
Galaxyhunter
Pooh-Bah
Reged: 01/02/06
Posts: 1257
|
|
I guess a better question is, What is the pitch for the metric thread?
--------------------
Carl
My lousy skies at Hawkeye Observatory
|
neo
professor emeritus
Reged: 02/12/08
Posts: 623
Loc: Iasi, Romania
|
|
I've just measured and it's 1mm pitch. The distance beteen two threads is 1mm. I hope I'm not wrong.
--------------------
Russian 15x50 binos
Home made 8" f/5 Newton on eq mount
Home made 70mm f/6 (Rodenstock Rotelar lens) Apo refractor
www.astronomy.ro
|
Galaxyhunter
Pooh-Bah
Reged: 01/02/06
Posts: 1257
|
|
Thank's for the info Alex. 
--------------------
Carl
My lousy skies at Hawkeye Observatory
|
neo
professor emeritus
Reged: 02/12/08
Posts: 623
Loc: Iasi, Romania
|
|
My pleasure Carl. Good luck on making the adaptor  !
Couldn't you find an adaptor readelly made for your camera and spare the trouble?
--------------------
Russian 15x50 binos
Home made 8" f/5 Newton on eq mount
Home made 70mm f/6 (Rodenstock Rotelar lens) Apo refractor
www.astronomy.ro
|
grendel
sage
Reged: 04/12/09
Posts: 250
Loc: Canterbury, Kent, UK
|
|
its always best to count 10 threads and measure 10 and then divide by 10, that gets a more accurate measure.
Grendel
|
Galaxyhunter
Pooh-Bah
Reged: 01/02/06
Posts: 1257
|
|
Quote:
Couldn't you find an adaptor readelly made for your camera and spare the trouble?
I'm trying to improve the camera fit into the focuser. The stock SBIG nose piece has .005" clearance plus it is only 1" long. With the weight of the Camera/AO8, it is hard to get it to seat squarely. The one I'm making will have .002" clearance & 2.5" long. My hope is that when the camera is installed, the slop (rocking motion) will be gone.
Quote:
its always best to count 10 threads and measure 10 and then divide by 10, that gets a more accurate measure.
This is true & thats what I always try to do, but there is only 3-4 threads on the filter that I have.
--------------------
Carl
My lousy skies at Hawkeye Observatory
|
neo
professor emeritus
Reged: 02/12/08
Posts: 623
Loc: Iasi, Romania
|
|
Carl, I hope you didn't start machining yet!! 
I apologise, I was terrible wrong. I've rechecked this morning in a better light and after measuring 10 threads like Grendel suggested it seems that the pitch is 0.7mm!!
I hope I haven't ruin anything...yet 
--------------------
Russian 15x50 binos
Home made 8" f/5 Newton on eq mount
Home made 70mm f/6 (Rodenstock Rotelar lens) Apo refractor
www.astronomy.ro
|
lukasik
Pooh-Bah
Reged: 10/11/05
Posts: 1048
Loc: Lawrenceville, Georgia
|
|
Hi Carl,
here's a previous thread about same question.
http://www.cloudynights.com/ubbthreads/showflat.php?Cat=&Board=atm&Number=2609861&Forum=f67&Words=-re%3A&Searchpage=0&Limit=250&Main=2609861&Search=true&where=bodysub&Name=12460&daterange=1&newerval=2&newertype=y&olderval=&oldertype=&bodyprev=#Post2609861
Best Regards,
Bob
|
Galaxyhunter
Pooh-Bah
Reged: 01/02/06
Posts: 1257
|
|
Quote:
Carl, I hope you didn't start machining yet!!
I apologise, I was terrible wrong. I've rechecked this morning in a better light and after measuring 10 threads like Grendel suggested it seems that the pitch is 0.7mm!!
 
Not a problem. that is going to be the last operation.
--------------------
Carl
My lousy skies at Hawkeye Observatory
|
neo
professor emeritus
Reged: 02/12/08
Posts: 623
Loc: Iasi, Romania
|
|
Again I'm terribly sorry but because of the poor evening light the first measurement wasn't so great   . I'm glad I've corrected it just in time.
--------------------
Russian 15x50 binos
Home made 8" f/5 Newton on eq mount
Home made 70mm f/6 (Rodenstock Rotelar lens) Apo refractor
www.astronomy.ro
|
Previous
Index
Next
Threaded
Edit
Reply
Quote
[Re: 