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  #21  
Old 25-02-2009, 03:40 PM
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Nice shot Greg!
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  #22  
Old 25-02-2009, 04:11 PM
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Great Cent. A Greg. Colours look on the money. I'm going to cut to the chase - how do you find the 180 for imaging? (How much is in the hype is the subtle question?). Does it meet your expectations or would you ditch it tomorrow for an AP180EDT on Astromart? (Maybe it is me expecting more in the output from such an exquisite instrument).

Thanks.
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  #23  
Old 25-02-2009, 04:16 PM
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Very nice indeed!
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  #24  
Old 25-02-2009, 06:33 PM
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Quote:
Originally Posted by jase View Post
Great Cent. A Greg. Colours look on the money. I'm going to cut to the chase - how do you find the 180 for imaging? (How much is in the hype is the subtle question?). Does it meet your expectations or would you ditch it tomorrow for an AP180EDT on Astromart? (Maybe it is me expecting more in the output from such an exquisite instrument).

Thanks.
Hmm, expect more what does that mean?

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Originally Posted by Paddy View Post
Very nice indeed!
Thank you.
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Originally Posted by jjjnettie View Post
Top shot!
Thanks Jeanette.

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Originally Posted by atalas View Post
Nice shot Greg!
Thanks Louie.
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  #25  
Old 25-02-2009, 07:53 PM
jase (Jason)
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Originally Posted by gregbradley View Post
Hmm, expect more what does that mean?
The ML8300 (with 5.4um) + 180 (which has a theoretical res of .66 arc). If I've crunched the numbers correctly, you're getting .88 arcsec - oversampled data...which is always better than undersampled, but I'm wondering if you're running any deconvolution here. I'd expect the stars and details to really "pop". Wouldn't the U16 be a better match?
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  #26  
Old 25-02-2009, 08:11 PM
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RB (Andrew)
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Greg that's a beautiful rendition of Cent A, just beautiful.

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  #27  
Old 25-02-2009, 08:15 PM
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Greg that's a beautiful rendition of Cent A, just beautiful.

Thanks Andrew. I am pleased you like it.

Greg.
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  #28  
Old 25-02-2009, 08:27 PM
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Quote:
Originally Posted by jase View Post
The ML8300 (with 5.4um) + 180 (which has a theoretical res of .66 arc). If I've crunched the numbers correctly, you're getting .88 arcsec - oversampled data...which is always better than undersampled, but I'm wondering if you're running any deconvolution here. I'd expect the stars and details to really "pop". Wouldn't the U16 be a better match?
To make something pop I think is more a question of focal length and total length of exposure and probably a little less the camera. I think overall the U16M is the better camera as per this:

http://www.pbase.com/gregbradley/image/108830707/large

And the FLI Microline 8300 is no slouch either with this:

http://www.pbase.com/gregbradley/image/109538475

Both of the above are with the TEC180mm.

I was thinking of using the U16M with the Baader fluorite flatfield converter which will do anywhere between 2X and 8X depending on the spacing. But that would give me F14 to F40. Great for planets. Not sure what that means with imaging. I think it means long exposure time for that size aperture. what do you think? 17 megapixels and high QE with deep wells and very low noise chip has got to do something nice! It'd be an expensive experiment though if it didn't work out as I can easily use a Powermate to get focal length for planetary work.

I got the ML8300 specifically to get better image scale whilst retaining the F5 of the BRC and the F7 of the TEC.

Greg.
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  #29  
Old 26-02-2009, 11:22 PM
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Thanks Ric.

Greg.
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