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Equipment Discussions >> Refractors

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Mr Onions
Two Time International Photographical Competition Winner
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Reged: 04/14/07

Loc: Newcastle upon Tyne.
Re: APM 152 ED APO #002 new [Re: mblack]
      #5587236 - 12/24/12 01:26 PM

David you do realize that you too will have to do a series of unboxing photos.
It's imperative.


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mblack
Throw me a bone here
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Reged: 10/31/05

Loc: Florida, USA.
Re: APM 152 ED APO #002 new [Re: Mr Onions]
      #5587288 - 12/24/12 02:03 PM

Quote:

David you do realize that you too will have to do a series of unboxing photos.
It's imperative.




Happy to oblige, Steve.


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James Ling
sage
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Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: mblack]
      #5587295 - 12/24/12 02:12 PM

Hi David....

Yes... I now also agreed to what you have just commented on the CA of this APM ED APO, after I have seen through this scope by myself at home at both the moon and the Sun...during these 2 weeks....

And today from another post, under the topic, APM 6" doublet on OPT's site, one of my astronomy friend who is present during the side walk also commented there is no CA seen on Jupiter...on this APM ED APO...

Hi All....

Sorry that there isn't any update from me, on the APM ED APO, for the past 2 weeks...., which is mainly due to the bad weather for any outdoor scope testing...

Last weekend I used the scope to view the 3 days and 4 days old moon, and it did not show any or even tiny trace of CA that i can see it with my other achros..when viewing the moon.
Today afternoon ( I am 12hrs ahead USA ), I set it up to view the Sun, with my Lunt Solar wedge, and comparing the view with my C6R F8, which I made numerous test on the solar wedge, the 152 new APM ED APO, shows a very distinct disc of the Sun.....
And tonight I used the scope to view the 10 days old moon, and again concur there isn't any trace of CA, even I tilt my sight of view. But due to the sky is very hazy, I will test it again, another day , if weather is better....

As for the APM triplet scope to APM ED scope test on Jupiter, due to the past two weeks of poor weather, both my friend and myself did not meet up to do any testing...

Will keep everyone updated again, once I have any outdoor scope testing....


Regards

James Ling


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mblack
Throw me a bone here
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Reged: 10/31/05

Loc: Florida, USA.
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5587447 - 12/24/12 04:05 PM

Thanks for the update James.

Quote:

And today from another post, under the topic, APM 6" doublet on OPT's site, one of my astronomy friend who is present during the side walk also commented there is no CA seen on Jupiter...on this APM ED APO...





Very encouraging that observation. Hope your weather clears up James, a comparison between the APM 152 doublet and your friends triplet will be quite interesting. The doublet should lag behind, on paper anyway, but to what extent I wonder?

Here's to hoping your skies are clear and this comparison comes to fruition.


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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: mblack]
      #5587473 - 12/24/12 04:24 PM

Looking forward to both you guy's futher comments and findings.
I'm pulling my hair out with envy.
And I haven't much to start with.


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dbs
member


Reged: 07/09/09

Re: APM 152 ED APO #002 new [Re: mblack]
      #5587915 - 12/25/12 12:11 AM

Quote:

James,

Thanks for reporting in such detail on this scope. I've pre-ordered through the US vendor and thanks to your posts I've a good idea of what to expect.

Quote:

When I took a look at the scope, what I have seen, concur to what my friend has told me, is that on one side of the edge of jupiter , there is a very thin , sort of color in red...., and on the opposite end, there is a very thin, sort of color in green....
My friend told me it could be due to the atmosphere or eye piece...





Yes, that's an atmospheric effect, not the scope or eyepiece.

Please share any further comments/observations you care to on this scope James, it has been great reading so far :>




I have field tested this scope from James on the very night of the public outreach.

I can confirm there is no CA on Jupiter. The "red and green band", is the atmospheric effect which is usual even when one use a SCT or Mak to view that planet. I have viewed Jupiter through all my scopes from SCT to reflectors, and that effect is quite common.

James, didn't have time to tell you that on that night because there are just too many people. But I know that Gary made that observation.

I know James has given his comments about the scope, and they are right on. I am very impress by the image from this scope. James forgot to mention that the image snaps into focus even at 300x or so. I am particularly fussy about CA and ease of focus on an APO. If you need to guess the focusing point, then that APO ain't good enough for me.

There is also a 5" ES triplet nearby for comparison, and the surface on Jupiter is much "whiter" on this 6" scope. However, Jupiter surface details are about the same on both scopes, which also tells me that the ES scope is very contrasty as well. The image on the 6" is very close to white, and the image on the 5" ES is much "warmer", giving an impression that the image on the 6"is "brighter". I am not sure if that's an effect of a triplet or that the triplet was using Plossls at that moment and the 6" was using Naglers and Baader Zoom, but it is still a very lovely image on the 5" ES.

All in all, for 4k, I think Markus has outdone himself. I believe 90% of the buyers will be very pleased with this scope as long they know what kind of weight and handling they need to manage.

James, I can't wait to do a comparison with Richard's LZOS 6" APO. Please contact me me when you guys meet up.

Merry Christmas everyone!

Edited by dbs (12/25/12 12:20 AM)


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Rinaldo
Pooh-Bah


Reged: 06/28/04

Loc: Lawng-eye-lind - New York, USA
Re: APM 152 ED APO #002 new [Re: dbs]
      #5588068 - 12/25/12 03:43 AM

James, did you pop each and every single bubble on all of your bubble wrapping??? Enjoy the scope!

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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Rinaldo]
      #5588224 - 12/25/12 09:18 AM

Hi Rinaldo...

This scope come with so much bubble wrapper that I am keeping it for future use, both to protect the big long case, as well as for the scope.....since I have plan to use it for coming February and March travel to Malaysia star gazing expedition.....

As for the scope, I really enjoy using it coz of its light weight and portability....

I can use my GM8 mount instead of G11 mount.......

Regards

James Ling


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Scott BeithAdministrator
SRF
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Reged: 11/26/03

Loc: Frederick, MD
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5588328 - 12/25/12 11:06 AM

James that was a great write up on the scope. Congrats on the new gear - it really looks good. Thank you for sharing astronomy with people through your outreach nights.

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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Scott Beith]
      #5589081 - 12/26/12 12:00 AM

Quote:

James that was a great write up on the scope. Congrats on the new gear - it really looks good. Thank you for sharing astronomy with people through your outreach nights.




Hi Scott Beith...

Thank you so much for your comments....

And I wanted to admit that I am really the lucky one to receive the 1st unit , rather than need to wait until March 2013, for the production units....

Hi All....

Although I knew this s/n#002 is being displayed at the Tucson Astronomy show, but from the sample I received, I knew how dedicate APM is handling this shipment, and without any cosmetic defects....
Except one advice to Markus, is that some buyers may not want to see some dust settling onto their precious glass surface....
As for me , is alright, as I can use cotton to move them away.....

Hi Scott Beith and All...

As for the outreach nights that I have participated, I may not do as often as what a few of my other astronomy friends are doing ....

But I always want to add new things , for the outreach activities, and once I have upgraded my other big scope, on its planetary performance, I will bring it out again.....

REgards

James Ling


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Pete-LH
sage
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Reged: 03/25/09

Loc: Wilmington, DE
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5589339 - 12/26/12 09:05 AM

Great Report James.
Personally I'm interested in the weight of the OTA. I am looking at downsizing from my G11 to a GM-8. I see the package was 26KG but I did not see the actual weight of the OTA. My apologies if I missed it elsewhere in this thread.
I briefly owned a C6R as well but feel it would be a little heavy for a GM-8. Is this OTA lighter than your C6R?
Regards,
Pete


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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: Pete-LH]
      #5589548 - 12/26/12 11:36 AM

22lbs for OTA according to the posts.

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James Ling
sage
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Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Mr Onions]
      #5590324 - 12/26/12 09:19 PM

Hi Pete...

Mr Onions is correct...
The OTA itself is 22 lbs...
I cannot recall the exact weight, is around 23 lbs, inclusive of the tube rings, losmandy dove tail, APM focuser, finder and brkts, APM 2" diagonal and extension tube....

As for the C6R , I have not weighed it against the APM ED APO..
Come to this weekend , when I am back from oversea , I do the weight comparison for this 2 OTA again and advice you....

Regards

James Ling


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Pete-LH
sage
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Reged: 03/25/09

Loc: Wilmington, DE
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5590966 - 12/27/12 10:46 AM

Thanks James, Mr. Onions in New Castle/Tynes(is that actually New Castle England? I have been there-Work Related)

I should have seen that weight information but was scanning the thread too quickly. My apologies. I am interested though on your thoughts of weight balance versus mount.

For visual as I am aging like everyone, I am trying to determine a minimal setup for the maximum practical aperture refractor and SCT on my GM-8(or Vixen GP). That's why I was interested in your GM-8/APM evaluation.

Right now I'm at a 4" refractor and 8" SCT as being optimum but I have an AP 5" Superplanetary that is fairly light (<20 lbs with finder, rings and average lens). It is OK on the GM-8 although the vibration settling time is close to my limit.


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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: Pete-LH]
      #5591150 - 12/27/12 12:48 PM

Hi Pete.
Yes, Newcastle upon Tyne, in north east England.
Geordieland.
Capital of Northumberland.
Haidrian's Wall etc.


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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: Pete-LH]
      #5591316 - 12/27/12 03:05 PM

Quote:

Thanks James, Mr. Onions in New Castle/Tynes(is that actually New Castle England? I have been there-Work Related)

I should have seen that weight information but was scanning the thread too quickly. My apologies. I am interested though on your thoughts of weight balance versus mount.

For visual as I am aging like everyone, I am trying to determine a minimal setup for the maximum practical aperture refractor and SCT on my GM-8(or Vixen GP). That's why I was interested in your GM-8/APM evaluation.

Right now I'm at a 4" refractor and 8" SCT as being optimum but I have an AP 5" Superplanetary that is fairly light (<20 lbs with finder, rings and average lens). It is OK on the GM-8 although the vibration settling time is close to my limit.




Pete

I have my 17 lb ED120 (including diagonal & rings) mounted on a GP, and using a HD Surveyors tripod it handles the scope exquisitely. Damp time is less than 1 second. I can lean against the focuser, it is incredibly solid! Adding the Surveyors tripod made all the difference.


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Pete-LH
sage
*****

Reged: 03/25/09

Loc: Wilmington, DE
Re: APM 152 ED APO #002 new [Re: SteveG]
      #5591383 - 12/27/12 03:39 PM

Thanks Steve, I see the pic of your setup in the 12/5/2011 Mount Post. I'll look into that. I may send you a PM for more information.

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James Ling
sage
*****

Reged: 09/18/10

Loc: Singapore
Re: APM 152 ED APO #002 new [Re: Pete-LH]
      #5593713 - 12/29/12 01:33 AM Attachment (93 downloads)

Hi Pete...

Hope you are not disappointed with the actual weight I taken today, for the 2 scopes...

1. C6R F8 , OTA with original focuser and tube rings.... 19.2 Lbs.

2. APM 152 ED APO, OTA with AMP focuser and tube rings..... 21.6 Lbs.

Yes... The APM ED APO , is much more heavier , when I carry them , and placed onto my weighing scale....
(Refer to photo) --both are almost the same, except APM dew shield is retractable....

REgards

James Ling


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aa6ww
scholastic sledgehammer
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Reged: 10/23/11

Loc: Sacramento, Calif.
Re: APM 152 ED APO #002 new [Re: James Ling]
      #5593752 - 12/29/12 03:02 AM

Its a beautiful scope James. They all are. We can never have too many refractors. They all exist for a reason. I have a big APM 180 F/6 and love that beast!!

...Ralph in Sacramento


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Pete-LH
sage
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Reged: 03/25/09

Loc: Wilmington, DE
Re: APM 152 ED APO #002 [Re: aa6ww]
      #5593764 - 12/29/12 03:22 AM

James,
Disappointed, No. I really appreciate your taking the time to compare and send the information and photos. It really gives me an idea on how your new scope handles since I had a C6R and used it on my G-11.
The weights are pretty comparable.


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