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  #1  
Old 27-03-2006, 07:47 PM
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asimov (John)
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The C9.25 XLT OTA has landed.

G'day all.

Thought I'd better show you my new imaging weapon

Ordered it thursday last week, paid for it the next day & it got here lunch time today. Andrews communications. Thanks for the great service Lee.

Yes *sigh* the clouds, rain, gale force winds are here too. Thats ok, no hurry (yeah right! ) Everything looks in tip-top condition, & it rides the EQ5 no sweat....A bit lighter than the refractor & less lever arm action should make it nice to 'drive'..

Cheers.
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  #2  
Old 27-03-2006, 07:59 PM
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davidpretorius
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congratulations, i am very excited for you. like a new addition to the family.

how many pounds, how long was labour???

oooo that a good size.....sleeping thu the night?????

I can't wait for a jup thru this..

did i hear a 5x powermate???? and a 3x powermate????
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  #3  
Old 27-03-2006, 08:01 PM
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mick pinner
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very nice Asi, l hope you get some good weather.
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  #4  
Old 27-03-2006, 08:08 PM
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RB (Andrew)
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Quote:
Originally Posted by davidpretorius
oooo that a good size.....sleeping thu the night?????
No actually you don't want them to sleep through the night David....

Congratulations John, Ive been waiting in anticipation for your new beauty to arrive, its stunning.

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  #5  
Old 27-03-2006, 08:08 PM
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asimov (John)
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Hey! would you believe this!?....Just stuck my head out the back door & the clouds are GONE!!!! The wind is dropping quickly too! Ok! what to do...Don't panic....AAAAAHH!.....Take said telescope out first/line up finder scope.....
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  #6  
Old 27-03-2006, 08:13 PM
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congrats Asimov all the best with the new scope. Clear skies.
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  #7  
Old 27-03-2006, 08:26 PM
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acropolite (Phil)
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I'm just plain jealous. Nice acquisition John, I wish it was mine
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  #8  
Old 27-03-2006, 08:27 PM
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Starkler (Geoff)
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Congrats on the new scope

Im interested to know your impressions on how well the scope rides on the eq5
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  #9  
Old 27-03-2006, 08:36 PM
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Dave47tuc (David)
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Congrat's on the new scope

I also would like to know how it rides on the EQ5 ?
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  #10  
Old 27-03-2006, 08:36 PM
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Great looking scope, ain't it Asi????

Get Bob's Knobs fitted as quick as you can and start posting some images so I can get some tips and advice from you.

I'm still trying to get to grips with my 9.25 three months after taking delivery Hope you have more opportunities to use yours than I've had.

Stoked that we've got another 9.25er on the site
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  #11  
Old 27-03-2006, 08:44 PM
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asimov (John)
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Well its out there cooling down, & not a breathe of wind. Seeing looks about 6-7/10. Lined up the finder on Saturn at 313X And first ligh impressions are: Collimation is ok, but some tweaking will be needed. A definite cool down period will be needed....saturn is shimmering in the EP nicely.

It rides the EQ 5 like it was made for it Geoff! Dampening time 3-4 seconds @ 313X, but its to do with the flex in the dovetail bar rather than the mount. It's a ***** to balance the scope out on the DEC axis, is my only complaint (so far). Hard to get to the dovetail locking screws, hold the OTA steady & move the OTA up or down depending on which way it's out. I'll get the hang of it I guess.
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  #12  
Old 27-03-2006, 08:50 PM
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Starkler (Geoff)
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Quote:
Originally Posted by Dave47tuc
I also would like to know how it rides on the EQ5 ?
I think I know what you're thinkin
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  #13  
Old 27-03-2006, 09:01 PM
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h0ughy (David)
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nice one Asi, now for those who can put two and two together, Dave you can get the computerised mount from andrews for 1299, look in his used and surplus stock area!
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  #14  
Old 04-04-2006, 09:26 PM
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g__day (Matthew)
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Lee has re-organised his site too today:

BTW:

<TABLE class=content cellSpacing=0 cellPadding=2 border=1><TBODY><TR class=tbl_text><TD class=desc>C9.25-A 9.25" (235mm x 2350mm) Go-To Schmidt-Cassegrain telescope (OTA only) with Starbright XLT UHT coatings</TD><TD class=price>$2599.00</TD></TR><TR class=tbl_text><TD class=desc>C9.25-CF 9.25" (235mm x 2350mm) Go-To Schmidt-Cassegrain CARBON FIBRE telescope (OTA only) with Starbright XLT UHT coatings</TD><TD class=price>$2799.00</TD></TR></TBODY></TABLE>
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  #15  
Old 04-04-2006, 09:34 PM
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asimov (John)
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I'm glad I got it when I did then!
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  #16  
Old 04-04-2006, 10:25 PM
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Starkler (Geoff)
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Dumb question time:

Why pay more for the carbon fibre model ?
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  #17  
Old 05-04-2006, 12:10 AM
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g__day (Matthew)
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Carbon Fibre has a much, much, much lower thermal expansion value - its like 0.2 vs 10.0 for aluminium or steel. So if you are long exposure imaging expect to get temperature variances which will mostly like shrink your telescope tube enough to impact your focusing (unless you're using a robofocuser or something). Otherwise every so often 20 - 30 minutes you might have to re-adjust focus.

Carbon Fibre is far less likely to be affected by a significant tempeature change from start of night to end of night, so your image should stay much sharper with fewer adjustments over the course of your imaging.

So for shorter imaging < 20 minutes, fewer worries, for longer imaging, more focal adjustments required or an auto-focusered needed more to adjust to tube length changes.

PS

Lee just dropped his surplus CG5 to about $1,100 ... tempting! <TABLE class=content cellSpacing=0 cellPadding=2 border=1><TBODY><TR class=tbl_text><TD class=desc>Celestron CG5 Go-To computerised mount with s/s tripod, new</TD><TD class=price>$1099.00</TD></TR></TBODY></TABLE>
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  #18  
Old 05-04-2006, 12:23 AM
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Starkler (Geoff)
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So.... its only about expansion/contraction and not thermal radiation considerations? If for visual only the former wouldnt matter I imagine.
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  #19  
Old 05-04-2006, 12:30 AM
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g__day (Matthew)
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That is my (limited) understanding. Doble check with those more knowledgable though!
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  #20  
Old 05-04-2006, 03:33 AM
Jonathan
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The CF OTA is also a few kg's lighter, so there's less stress on the mount. I was going to buy the CF version of my C11 but the price difference was huge at the time.
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