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Equipment Discussions >> Refractors

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Moonglum
professor emeritus


Reged: 06/01/08

Re: APM 152 ED APO #002 new [Re: mblack]
      #5658975 - 02/02/13 09:51 PM

Relax, that's just how he stores them...

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johnnyha
Postmaster
*****

Reged: 11/12/06

Loc: Sherman Oaks, CA
Re: APM 152 ED APO #002 new [Re: Moonglum]
      #5658977 - 02/02/13 09:52 PM

I can think of better storage solutions...

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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: t.r.]
      #5659114 - 02/02/13 11:24 PM Attachment (68 downloads)

Quote:

Thats not on a G-11, is it?




Hi ALL...

Yes... That's my old Celestron G11, upgraded to G2....
And I am using the GM8 LW tripod....

If just one scope , whether is the 152 APM ED APO or the 10" Mewlon, one 22 lbs counterweight is all I need...

But when I piggy back the 10" Mewlon over the top of my APM ED APO's, I need 3 X 22 Lbs counterweights to balance it....

REgards

James Ling


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: mblack]
      #5659144 - 02/02/13 11:46 PM Attachment (52 downloads)

Quote:

Quote:

Ay yi yi... that looks a bit precarious!




Yes indeed. Slippage comes to mind, unless those rings on the refractor are torqued down.

James, I am assuming you have this rig secured, because it looks like a disaster in waiting.






Hi All....

Yes... It seems not wise to have 2 scopes mounted vertically, but I just going to do tracking but not going for GOTO slew...during the side walk.....
This setup is for visual, not for AP...

Surprisingly, at RA slew, the motor does not stall, instead it stalls under DEC slew...But I have lowered the speed to 500 for the G2 system....

All the preliminary test are done yesterday before I do the actual outdoor coming side walk......

From the photo I mounted the vixen dove tail bar directly over the 2 mounting rings of the APM scope...
Then I secured the losmandy wide dove tail over the vixen dove tail, so that the Mewlon will be secured by the losmandy wide dove tail....

Regards

James Ling


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johnnyha
Postmaster
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Reged: 11/12/06

Loc: Sherman Oaks, CA
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5659148 - 02/02/13 11:55 PM

AT THE VERY LEAST I think you need another of those little Losmandy saddles...

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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: johnnyha]
      #5659149 - 02/02/13 11:55 PM Attachment (55 downloads)

Quote:

I can think of better storage solutions...




Hi Kirk Schmitt , Johnny and ALL...

For the APM, I leave it on the mount, but with bags of silica gels, placed at both ends of the scope....

For the Mewlon, when not in-use, is kept permanently at all times, inside a electronic dry cabinet.....

Regards

James Ling


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Pete-LH
sage
*****

Reged: 03/25/09

Loc: Wilmington, DE
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5659865 - 02/03/13 12:08 PM

I have been to Singapore ... you definitely need a dry cabinet there. Great Idea!
I must say you do optimize the capability of your mounts.


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Pete-LH]
      #5691698 - 02/20/13 08:26 PM Attachment (56 downloads)

Quote:

I have been to Singapore ... you definitely need a dry cabinet there. Great Idea!
I must say you do optimize the capability of your mounts.




Hi Pete and All...

I welcome you and all CN members to visit our small city island, Singapore....

And if possible can show our simple side walk location to anyone of you , if you have the time, when visiting our city....(attached photo)

Although our city is light polluted and not suitable for DSO observing, (possible for some, at certain darker spots), and this make the refractor , an ideal equipment ....
In this case the 152 APM ED APO really never disappoint anyone viewing through it , especially Jupiter.....

Last Monday side walk , although Jupiter is much smaller than the December one, but at 200X, the APM ED APO really shows very details on the surface of Jupiter and its 4 moons.

And I can assured anyone who has placed the order for the 152 APM ED APO, will not be disappointed with the views form Jupiter, especially when the atmosphere and seeing is good....

But for those who are very concern on CA, perhaps you will need to fork out a few more thousands of dollars to go for the triplet, coz at last Monday night, on the 9 days old moon, there is a very thin layer of greenish-yellow (CA)that is being observed...
Of course , if I compared this to my C6R F8, the amount is like 1/3 or even smaller, definitely less than 50%....
And in my opinion, anyone that has a chromacor or the raycorr (in the near future), will be able to work well with this scope, on further reducing its CA level....

Regards

James Ling


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zjc26138
Loved By All
*****

Reged: 02/24/05

Loc: Mingo Junction, Ohio
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5691746 - 02/20/13 08:54 PM

Thanks for the report and the invite James! I'd love to get to Singapore one of these days.

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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: zjc26138]
      #5692145 - 02/21/13 02:49 AM

Hi Zach Coldebella .....

Thanks.....

And please send me a PM , before you come over....
And I can make some arrangement.....

And is the same to the rest of CN members.....
As Singapore is just 1 deg N above the equatorial.....
It will be hot and wet, but not very cold , like those in the climate regions......

Regards

James Ling


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SteveG
Post Laureate
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Reged: 09/27/06

Loc: Seattle, WA
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5692841 - 02/21/13 02:10 PM

Same thin layer of greenish-yellow I see on the moon with my ED120. Not a problem at all, and no where near the CA you see on an achro. I expect a little CA on a $4K 6" APO.

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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: SteveG]
      #5693446 - 02/21/13 08:03 PM

Hi Steve....

Yes, my WO88ED doublet also has a very thin layer......

Hi ALL...

This coming weekend, if the weather is good, I will be doing another shootout at my friend's roof top......

This time is a little interesting...., as I am adding my 8" ISTAR , and using my friend's AP900 mount.....in this shootout.....

REgards

James Ling


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Bill Barlow
Carpal Tunnel
*****

Reged: 12/03/07

Loc: Overland Park KS
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5693460 - 02/21/13 08:08 PM

Hi James,

Have you had the chance to compare the APM 152 doublet with the Edge C8 or the C9.25 SCT yet?

Bill


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Bill Barlow]
      #5693519 - 02/21/13 08:38 PM

Hi Bill....

Sorry the very last shootout at my friend's place is not successful, as such tomorrow we are doing another round of shootout....
The delay is simply due to the poor weather, mainly heavy rains during the past few weeks.....

BTW, my friend has 4 equatorial mounts, and two are on fixed pier, at his roof top.....
So there shouldn't be any problem to have his C8 edge put up again....

I just hope that the weather is good when we do the shootout again.....

REgards

James Ling


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Bill Barlow
Carpal Tunnel
*****

Reged: 12/03/07

Loc: Overland Park KS
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5695627 - 02/22/13 08:58 PM

Hi James,

Sounds like a fun night if the weather cooperates for you.

Bill


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Bill Barlow]
      #5696552 - 02/23/13 12:51 PM Attachment (74 downloads)

Hi All....

This is the set up with the 8" Istar Achro, 6" APM ED APO and 8" edge at my friend Alfred's roof top....few hours ago....

Regards

James Ling


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Scott BeithAdministrator
SRF
*****

Reged: 11/26/03

Loc: Frederick, MD
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5696723 - 02/23/13 02:30 PM

Very nice!

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mblack
Throw me a bone here
*****

Reged: 10/31/05

Loc: Florida, USA.
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5696896 - 02/23/13 04:04 PM

Quote:

Hi All....

This is the set up with the 8" Istar Achro, 6" APM ED APO and 8" edge at my friend Alfred's roof top....few hours ago....

Regards

James Ling




Hi James- I see your friend has three piers, that's a very nice observatory.


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: mblack]
      #5697141 - 02/23/13 07:17 PM Attachment (39 downloads)

Hi John Scott Beith and David....

Thanks for your comments....

Hi All...

Yes.. My friend just added the 3rd pier recently....
And have his AP900 on this 3rd pier that I just need to bring my 8" Istar there and mounted onto it.....

The AP900 mount is definitely very much stable with a bigger RA and Dec gear, than my G11....

REgards

James Ling


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5697152 - 02/23/13 07:23 PM Attachment (52 downloads)

Hi ALL...

This is another photo of the other 2 piers.....

The C8 edge HD is pointing at the moon....

While behind me, is the APM pointing at Jupiter.....

REgards

James Ling


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