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 Post subject: Re: Canon EOS adapter
PostPosted: Sun Dec 16, 2012 10:56 pm 
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Joined: Tue Feb 28, 2012 6:48 pm
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Location: Bolton
bchamberlain wrote:
Thanks for that. T mount is the name I needed. I have a 200 mm Skywatcher Newtonian reflector on a EQ5 mount. There's no sign of a thread on the 2" focus tube.



I have a Skywatcher 200P & EQ5 and mine did have a T Mount as standard. The 1.25" adaptor is screwed into it. The EOS adaptor will also fit on it and can be left on it. I just have to unscrew the 1.25" adaptor from the T mount to fit my Canon on.

I'll take some pictures tomorrow and post them for you to compare with yours.

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Phil
Skywatcher Explorer 200P & EQ5


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 Post subject: Re: Canon EOS adapter
PostPosted: Sun Dec 16, 2012 11:08 pm 
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Location: Bolton
Here's the T Mount and 1.25" eyepiece holder taken off the telescope, this is standard without the EOS adaptor fitted. you can see the screw thread below the 1.25" adaptor where the EOS adaptor would screw.

Attachment:
File comment: standard T Mount and 1.25" eyepiece holder.
HTC HD7 T9292_000983.jpg
HTC HD7 T9292_000983.jpg [ 130.53 KiB | Viewed 3830 times ]


Below is with the EOS adaptor fitted to the 2" T mount, and the 1.25" adaptor unscrewed.

Attachment:
File comment: Camera Adaptor connected to the 2" T mount
HTC HD7 T9292_000984.jpg
HTC HD7 T9292_000984.jpg [ 103.91 KiB | Viewed 3830 times ]


this is the way I normally leave it on the telescope.

Attachment:
File comment: complete assembly on the telescope
HTC HD7 T9292_000985.jpg
HTC HD7 T9292_000985.jpg [ 132.75 KiB | Viewed 3830 times ]

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Phil
Skywatcher Explorer 200P & EQ5


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 Post subject: Re: Canon EOS adapter
PostPosted: Wed Dec 19, 2012 9:48 am 
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Joined: Mon Oct 12, 2009 8:27 pm
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Location: Adlington
Biil,
I think I've twigged it.
Your original Canon adapter with the 48mm thread is designed to screw into the coma corrector which then slides into the 2-inch focuser. Without the coma corrector only the middle 10mm or so would be sharp so the coma corrector is the way to go.
The Canon T-mount (42mm) will be useful for other things but is not required for prime focus imaging with your scope.


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 Post subject: Re: Canon EOS adapter
PostPosted: Wed Dec 19, 2012 9:22 pm 
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Joined: Fri Sep 07, 2012 7:20 am
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Location: Atherton
Great! I now have options. As you guessed David, the thread on the coma corrector matches the EOS adapter so I'll try that first. If I have focus problems I'll get the camera adapter/nose piece from Pulsar Optical. Thanks all for your help. Anyone know where I can book a clear sky? preferably after dark.


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 Post subject: Re: Canon EOS adapter
PostPosted: Fri Dec 21, 2012 12:07 pm 
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You're right David. The coma corrector has the same 48 mm thread. If I have focus problems I'll try the camera adapter from Astro engineering.


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