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Equipment Discussions >> Refractors

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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Hermie]
      #5560166 - 12/07/12 11:34 PM

Quote:

James,

Congratulations on a beautiful scope, and Happy Birthday too! Now all you need for Christmas are some clear skies ..... and maybe an Ethos 21!

Well done!

Hermie




Thanks Hermie...

I really did not plan this for my this year birthday, and it so happen it all happened at the same time....

As for the Ethos 21, I know is great to have..., although currently I have the 22mm TV panoptic....

Yes, with this scope arriving perfectly during Jupiter opposition time, I have the whole of this month of December to put it out for more side walks....

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]
      #5560244 - 12/08/12 12:39 AM

Beautiful scope James!

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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: zjc26138]
      #5560294 - 12/08/12 01:29 AM

Quote:

Beautiful scope James!




Hi Bro..

Thanks for your comment...

The physical appearance of this scope really meet my expectation, as previously not much photos being taken from this new scope...

And it come in a nice case, which give me peace of mind, when I travel with it for star gazing activities...

REgards

James Ling



And


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Mark9473
Postmaster
*****

Reged: 07/21/05

Loc: 51N 4E
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5560458 - 12/08/12 07:13 AM

I'm surprised that with a doublet objective, the scope is still so front heavy. Or is perhaps the dewshield not extended in those last two images?

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Mr Onions
Two Time International Photographical Competition Winner
*****

Reged: 04/14/07

Loc: Newcastle upon Tyne.
Re: APM 152 ED APO #002 new [Re: Mark9473]
      #5560469 - 12/08/12 07:30 AM

Wonderful set of photos.
Goodluck with your new scope.


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Ambiorix
member


Reged: 05/01/11

Re: APM 152 ED APO #002 new [Re: Mr Onions]
      #5560501 - 12/08/12 08:12 AM

Good looking scope James, good luck with it!

I can't help to give a few remarks:

-Markus, the total weight of the scope is almost doubled to what you promised in the first place.

-On a refractor a focuser with only 6cm travel is not very......well....fill in whatever you want:)

-When I asked why the case was not a couple of inches longer to fit the scope, diagonal attached to it, you told me people preffered the shorter case for the tube only. You did not mention that the tube is so short that, according to James' pictures anyway, a very long extension is needed to reach focus, even with a big 2" diagonal! Not good if it is the case! And please, Markus, do not come telling me that people prefer a short tube with an extension one mile long hanging behind it:) Now I understand why the case is so short:) Once again, at least if the configuration in James' pictures is indeed correct and the extension is really needed, otherwise, no problems with this issue....

I think optically and for the rest it will be fine.


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ryderc1
sage
*****

Reged: 04/15/06

Re: APM 152 ED APO #002 new [Re: Hermie]
      #5560508 - 12/08/12 08:25 AM

Is the dewshield retractable? If yes, it appears that it's necessary to remove the rings in order to retract it since it looks like the scope is very nose heavy and needs the rings to be very far forward on the OTA to balance/mount the scope.

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Sunspot
Postmaster
*****

Reged: 03/15/05

Loc: Surprise, AZ
Re: APM 152 ED APO #002 new [Re: Ambiorix]
      #5560610 - 12/08/12 10:09 AM

James,

Beautiful! I admired that scope there in Tucson, but it never occurred to me to ask Markus if it was for Sale! I could have bought it and saved shipping because we drove down from Phoenix. My loss is your gain! It looks like it is in a good home.

As far as the comment about weight, I thought Markus initially said it would weigh 16 pounds and has gone up to 22 pounds (not quite twice as much as someone commented). Still it's a pretty light scope for a 6" (the Explore Scientific 5" triplet weights 22 pounds and the 6" definitely tops that!).

My almost exclusive use for the scope would be solar and I'm wondering how attaching a Herschel Wedge, 3x barlow and a webcam would affect focus based on the focusing tube length. Of course I would probably replace the focuser with an electric focuser.

Again, congratulations!!!
Paul


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CounterWeight
Postmaster
*****

Reged: 10/05/08

Loc: Palo alto, CA.
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5560642 - 12/08/12 10:35 AM

James,

Thanks for the fantastic post and image documentation, very much appeciated here. How does the scope feel as far as weight balance and distribution? Will patiently await your visual report though I anticipate a very positive experience there.

Congratulations, and again thank you.


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Mark9473]
      #5560911 - 12/08/12 01:41 PM Attachment (158 downloads)

Quote:

I'm surprised that with a doublet objective, the scope is still so front heavy. Or is perhaps the dewshield not extended in those last two images?




Hi Mark...

Yes... When I received the new scope, after I set it up for my own test at home, I did not extend the dew shield, and that is the balance point, which is at the centre of the losmandy dovetail....

Only yesterday when Steve asked me whether the dew shield is retractable, then I extend it, and dovetail need to move forward almost an inch to balance the scope...

And during last night side walk, I extended the dew shield as there are plenty of lamp post around the observing place...(pls refer to following photo , which shows the fully photo of the extended dew shield)

Regards

James Ling
Regards

James Ling


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Mr Onions]
      #5560920 - 12/08/12 01:47 PM Attachment (219 downloads)

Quote:

Wonderful set of photos.
Goodluck with your new scope.




Hi Bro...

Thanks for your comments....

Yes... Last night, the 1st outdoor 1st light for this 152 APM ED APO, really again never disappoint both the crowds and everyone present....

This photo taken last night shows the APM ED APO stands out with the apartment right behind it....

REgards

James Ling


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Traveler
Pooh-Bah


Reged: 08/19/07

Loc: The Netherlands
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5560927 - 12/08/12 01:51 PM

Great pictures! Thats is a huge scope.

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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Ambiorix]
      #5560937 - 12/08/12 02:01 PM

Quote:

Good looking scope James, good luck with it!

I can't help to give a few remarks:

-Markus, the total weight of the scope is almost doubled to what you promised in the first place.

-On a refractor a focuser with only 6cm travel is not very......well....fill in whatever you want:)

-When I asked why the case was not a couple of inches longer to fit the scope, diagonal attached to it, you told me people preffered the shorter case for the tube only. You did not mention that the tube is so short that, according to James' pictures anyway, a very long extension is needed to reach focus, even with a big 2" diagonal! Not good if it is the case! And please, Markus, do not come telling me that people prefer a short tube with an extension one mile long hanging behind it:) Now I understand why the case is so short:) Once again, at least if the configuration in James' pictures is indeed correct and the extension is really needed, otherwise, no problems with this issue....

I think optically and for the rest it will be fine.




Hi Bro....

I need to clarify one important point here...
The focuser sent to me is not the exact one , for anyone who has placed the order for this new 152 APM ED APO.

APM replaces me with their APM focuser and an extension tube, as the 1st sample is sent to them without the exact focuser...
Perhaps Markus should explain again what will be the exact type of focuser for those who has placed their order...

As for the case, last night, when I loaded it into my saloon car, for the side walk, it took up the whole of the rear passenger car seat...
And for me, I still prefer this length, for my own convenient...especially on the transportation using car.

Regards

James Ling


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Sunspot]
      #5560958 - 12/08/12 02:18 PM Attachment (162 downloads)

Quote:

James,

Beautiful! I admired that scope there in Tucson, but it never occurred to me to ask Markus if it was for Sale! I could have bought it and saved shipping because we drove down from Phoenix. My loss is your gain! It looks like it is in a good home.

As far as the comment about weight, I thought Markus initially said it would weigh 16 pounds and has gone up to 22 pounds (not quite twice as much as someone commented). Still it's a pretty light scope for a 6" (the Explore Scientific 5" triplet weights 22 pounds and the 6" definitely tops that!).

My almost exclusive use for the scope would be solar and I'm wondering how attaching a Herschel Wedge, 3x barlow and a webcam would affect focus based on the focusing tube length. Of course I would probably replace the focuser with an electric focuser.

Again, congratulations!!!
Paul




Hi Paul...

Thanks for your comments...
And I should say I am very lucky as many people did not know that this scope at Tuscon Astronomy Show is for sale....
Otherwise I will need to wait until early March 2013 for the delivery of the scope that I have placed the order...

As for the weight of this OTA, I am quite happy with it, as is still consider very much lighter than most of my bigger aperture scope...

And you also mentioned that the weight is similar to the ES 5" triplet, really surprised me, coz last night, one of our team member has brought this scope along and put side by side with this 152 APM ED APO, is so much smaller and shorter (FL less than 1000mm)....(pls refer to photo taken towards end of our side walk session)
In fact we are commenting on the case provided by the two scope manufacturers....and mine seems to be the better quality....

REgards

James Ling


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Mr Onions
Two Time International Photographical Competition Winner
*****

Reged: 04/14/07

Loc: Newcastle upon Tyne.
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5560965 - 12/08/12 02:22 PM

Your outreach site is like mine,very heavily light polluted but as I only target moon & bright planets it doesn't make too much difference.
Great work you're doing there!
I bet the public were amazed looking through them.
Did the seeing let you use the full aperture?


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: CounterWeight]
      #5560986 - 12/08/12 02:34 PM

Quote:

James,

Thanks for the fantastic post and image documentation, very much appeciated here. How does the scope feel as far as weight balance and distribution? Will patiently await your visual report though I anticipate a very positive experience there.

Congratulations, and again thank you.




Hi Bro....

Looks like many people in CN is concerned about the weight distribution of this new OTA...
And after one day experience of using it, I can only make the following comments:-

1. Yes, the weight of the lens cell is quite heavy, and even with the mounting rings being moved very close towards the counter cell assembly, you can feel the tilting of the scope when you carry it using the carry handle...

2. If you want to remove the OTA from the mount, is best to have the diagonal, eye piece and finder still mounted on the focuser, otherwise, due to this imbalance, you may drop the scope if you could not catch it on time....

Regards

James Ling


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stevew
Now I've done it


Reged: 03/03/06

Loc: British Columbia Canada
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5560998 - 12/08/12 02:45 PM

Beautiful scope James.
How about a couple of comments on it's performance.
We all want to know how did Jupiter look?
Are you impressed with the images?

Steve


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: ryderc1]
      #5561003 - 12/08/12 02:48 PM

Quote:

Is the dewshield retractable? If yes, it appears that it's necessary to remove the rings in order to retract it since it looks like the scope is very nose heavy and needs the rings to be very far forward on the OTA to balance/mount the scope.




Hi Bro...

Yes, this scope can be classified as nose heavy, as far as I come to know about this important aspect that many people are looking at...
The mounting ring position that APM set for me , during the delivery, is very close to the dew shield when it is retracted fully backwards or in home position...
And this position is just nice when you add in the 2 inch diagonal, finder, and eye piece....

As such there is no requirement to move the mounting rings further up, when the dew shield is pushed forward...
The balancing is at the dovetail, which is around 12 inches long, or 6 inches from central point, and I only offset about one inch away for the balancing for the tilting of the OTA....

Regards

James Ling


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Traveler]
      #5561019 - 12/08/12 02:58 PM

Quote:

Great pictures! Thats is a huge scope.




Hi Bro...

Thanks for your comment..
I only took a few photo shots during my little break for last night side walk...

Is non stop from 8pm till 11.30pm....whereby people anxiously wanted to see how Jupiter looks like in this big scope....

Regards

James Ling


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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 [Re: Mr Onions]
      #5561027 - 12/08/12 03:05 PM

Quote:

Your outreach site is like mine,very heavily light polluted but as I only target moon & bright planets it doesn't make too much difference.
Great work you're doing there!
I bet the public were amazed looking through them.
Did the seeing let you use the full aperture?




Hi bro...

Yes, the public are so excited when we are here......
Last night, unlike previously, we only have a few scopes, and the queue is so long....
And this time, we have more than 7 or 8 scopes, so the crowds are now spread around.....between all the scopes...
Although the weather is a bit cloudy, but there are many moments of clear patch of sky, and we are able to let the public see Jupiter and its 4 moons clearly.....

REgards

James Ling


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