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  #101  
Old 17-11-2018, 02:26 PM
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multiweb (Marc)
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Woohoo!


Got the final piece in the mail this morning, the coveted focal reducer to bring the system from F/12.4 down to F/9.9. So my box of goodies is now full.

To date I have finally a complete system. The only thing I don't have is the certificate. Takahashi doesn't make test certificates public but I had a verbal confirmation that this scope serial# had passed as "excellent" by takahashi internal standards from the people who put it together at the factory.

Now I'm tightening my mount and trying to remember how to use the SXV-AO-LF then I should be well on my way to having some long focal length fun and try my luck at some small galaxies.
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  #102  
Old 17-11-2018, 02:47 PM
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Merlin66 (Ken)
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Any reason you wouldn’t use the New focus f3.9 and a good barlow to get f7.5 etc rather than a reducer on the Cass?????
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  #103  
Old 17-11-2018, 03:34 PM
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multiweb (Marc)
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Any reason you wouldn’t use the New focus f3.9 and a good barlow to get f7.5 etc rather than a reducer on the Cass?????
Plenty. There's a coma corrector for the newt and a big overhang already. The cassegrain side is also a lot easier to collimate and more rigid with plenty of back focus. Makes sense to use that end. I haven't finalised how I'm going to automate focus yet. At the moment I have a moonlite at the cassegrain end so I don't have to move the primary. For the newt in visual it is very awkward to look into the eyepiece and extend your arm to the back of the scope to focus. That's 80cm away. So if you image in newt mode you need to move the primary. This means in the long term I might have to get a starizona micro-focuser, feathertouch kind of setup and mount a sharpsky pro on it like I did for the C11. But I'm more interested in the immediate to image at long FL at the cassegrain focus. This is why I got the scope and moved away from the Mewlon 210 which had a smaller uncorrected imaging circle. This one is dead flat across 39mm.

Last edited by multiweb; 17-11-2018 at 04:01 PM.
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  #104  
Old 17-11-2018, 04:32 PM
Dennis
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Originally Posted by multiweb View Post


Got the final piece in the mail this morning, the coveted focal reducer to bring the system from F/12.4 down to F/9.9. So my box of goodies is now full.

To date I have finally a complete system. The only thing I don't have is the certificate. Takahashi doesn't make test certificates public but I had a verbal confirmation that this scope serial# had passed as "excellent" by takahashi internal standards from the people who put it together at the factory.

Now I'm tightening my mount and trying to remember how to use the SXV-AO-LF then I should be well on my way to having some long focal length fun and try my luck at some small galaxies.
You might need this back focus info.

Cheers

Dennis
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  #105  
Old 17-11-2018, 04:47 PM
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You might need this back focus info.

Cheers

Dennis
You're awesome mate!
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  #106  
Old 29-11-2018, 11:01 PM
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Trap in Ha 30min with the CN-212/QHY9. Desperate to image so did this in a few sucker holes. Needed to confirm scope was properly collimated and star shapes alright. Looks good all over the field. Happy days.

HD here

Big one (1:1) here
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  #107  
Old 30-11-2018, 07:43 AM
Kunama
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That looks good Marc, now that you have it dialled in I am looking forward to seeing what you can do with this scope with good sky conditions.

The restoration was well worth the time and effort
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  #108  
Old 30-11-2018, 09:44 AM
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That looks good Marc, now that you have it dialled in I am looking forward to seeing what you can do with this scope with good sky conditions.

The restoration was well worth the time and effort
Thanks Matt. Yeah I'm over the moon with that scope fov. It is so good across the whole field. Almost looks like FSQ quality stars at 3m. Very impressive. And it is better corrected than the Mewlon 210 although the fields are very similar. My guiding is the bottle neck so I'm not even close to what this scope can do. This is still 70% of the top performance I reckon.

PS: added final stack with 25x2min and 200% fov center, edges and corners to show correction (big one here).

Stars would be perfectly round if I could guide under 1 second of arc. I can live with it for now. I just want to image.
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Last edited by multiweb; 30-11-2018 at 10:41 AM. Reason: added pics
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  #109  
Old 30-11-2018, 03:57 PM
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Very impressive, Marc! I can probably find you a spare pier at El Sauce
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  #110  
Old 01-12-2018, 12:32 PM
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Very impressive, Marc! I can probably find you a spare pier at El Sauce
My astro tent base is 2x2m. I have a tripod and a compass. I'll bring the cheese and wine.
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  #111  
Old 01-12-2018, 02:02 PM
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My astro tent base is 2x2m. I have a tripod and a compass. I'll bring the cheese and wine.
And some chips for the alpaca
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  #112  
Old 01-12-2018, 02:36 PM
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And some chips for the alpaca
Some yass grass.
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