Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> Refractors

Pages: 1 | 2 | 3 | 4 | (show all)
Bowmoreman
Clear enough skies
*****

Reged: 09/11/06

Loc: Bolton, MA
Re: AP 130 vs TEC 140 vs TOA130 new [Re: t.r.]
      #4022464 - 09/02/10 03:43 PM

This is only a guess... but: enough blanks to make it "easier/faster" to do 130's than 155/160-class???

Who knows?

clear enough skies


Post Extras: Print Post   Remind Me!   Notify Moderator  
peleuba
professor emeritus


Reged: 12/01/04

Loc: Southern PA
Re: AP 130 vs TEC 140 vs TOA130 new [Re: t.r.]
      #4022495 - 09/02/10 03:51 PM

Quote:

What logic is RC using in producing so many of the low cost 130's vs. filling the orders for the 160? Yuri has an edge in that market with the 140 at lower cost anyway. The AP160 list is just as long as the 130 and the profit margin has to be higher I would think.




The AP130 list is probably longer as it includes all of the folks on the Traveler list as well as the 130 F/8 and the 130 F/6 lists.

The AP160 is a tough scope to manufacturer. Its an airpaced triplet, so 6 air-to-glass surfaces need to be as perfect as possible. On an oiled triplet, only R1 and R6 need to be perfect or nearly so as these surfaces are the only ones that contribute to wavefront error. The oil makes the rest of the glass - optically speaking - behave as a single lense. However, this is not to say that R2,R3,R4,R5 need not be made to exacting standards - they DO! But they do not have to be to the same level of R1 and R6. Both Roland and Yuri have commented on this.

So, basically the relative ease of using oil/gel in the spacing makes up for the extra degree of freedom that an airspace would allow.

Roland has said that he is still intending to make larger APO's, but I would bet that they will not be air-sapced, but rather, he will go back to an oiled 6" lens.

Edited by peleuba (09/02/10 03:53 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
t.r.
Post Laureate
*****

Reged: 02/14/08

Loc: Upstate NY
Re: AP 130 vs TEC 140 vs TOA130 new [Re: peleuba]
      #4022519 - 09/02/10 03:58 PM

And he is how old now? I think anyone waiting for a larger AP is going to be unless a prodigy is being groomed...

Post Extras: Print Post   Remind Me!   Notify Moderator  
Bowmoreman
Clear enough skies
*****

Reged: 09/11/06

Loc: Bolton, MA
Re: AP 130 vs TEC 140 vs TOA130 new [Re: t.r.]
      #4022692 - 09/02/10 05:32 PM

Quote:

And he is how old now? I think anyone waiting for a larger AP is going to be unless a prodigy is being groomed...




Ooooh, oooohhhh...

Pick ME, Pick ME!

(as the "prodigy" that is)...

Sadly, you may be right

Clear enough skies


Post Extras: Print Post   Remind Me!   Notify Moderator  
Doug D.
Carpal Tunnel
*****

Reged: 08/23/05

Loc: Virginia
Re: AP 130 vs TEC 140 vs TOA130 new [Re: Bowmoreman]
      #4022993 - 09/02/10 08:24 PM

While on the subject of premium scopes in the 130-140 range, do you think there will ever be another run of the AP140? I remember reading somewhere that Roland suggested there might be another run but that it wouldn't be in the 160 tube like the 1st gen AP140. Or maybe my recollection is fuzzy..?

With the 130 going full tilt and devotees clamoring for the next 160 run, I'm not sure I see the point particularly given the popularity of the TEC 140. Of course, "if he builds it - they will buy it" will no doubt still apply.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mike Clemens
Frozen to Eyepiece
*****

Reged: 11/26/05

Loc: Alaska, USA
Re: AP 130 vs TEC 140 vs TOA130 new [Re: Doug D.]
      #4023045 - 09/02/10 08:57 PM

> do you think there will ever be another run of the AP140?

unfortunately, nobody can answer that


Post Extras: Print Post   Remind Me!   Notify Moderator  
Doug D.
Carpal Tunnel
*****

Reged: 08/23/05

Loc: Virginia
Re: AP 130 vs TEC 140 vs TOA130 new [Re: Mike Clemens]
      #4023054 - 09/02/10 09:00 PM

.....except Roland, of course.

Post Extras: Print Post   Remind Me!   Notify Moderator  
joelwhicker
sage


Reged: 07/24/08

Re: AP 130 vs TEC 140 vs TOA130 new [Re: Doug D.]
      #4023194 - 09/02/10 10:14 PM

Think he did...Message number 51135 in the apug on Yahoo.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Mike Clemens
Frozen to Eyepiece
*****

Reged: 11/26/05

Loc: Alaska, USA
Re: AP 130 vs TEC 140 vs TOA130 new [Re: joelwhicker]
      #4023460 - 09/03/10 01:13 AM

I think Roland only mentions the 130 and the 160 in that one. Well I guess the first sentence could be construed to include the 140.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Gregory
member


Reged: 07/24/05

Re: AP 130 vs TEC 140 vs TOA130 new [Re: HCR32]
      #4023548 - 09/03/10 02:55 AM

Quote:

Dont know what to do. Buy second hand ap130 gt or buy a tec 140 brand new or b[r]and new TOA130.




I have owned two of these scopes, and have looked
through the third. My advice, although not typical,
is:

a) If you plan to do any imaging whatsoever, buy
the TOA-130 or the A-P, in that order.

b) If weight and portability are a concern, buy
the A-P.


Quote:

I have a meade rcx400 10inch that I use but I'm just wondering if any of the above listed refractors are good enough visually to make me retire my Meade rcx400. On occasions I do image as well (planetary).




If you use a 130mm (or 140mm) scope exclusively for
visual work, you will never see Pluto again.

Greg


Post Extras: Print Post   Remind Me!   Notify Moderator  
MAURITS
scholastic sledgehammer


Reged: 09/22/09

Loc: Belgium
Re: AP 130 vs TEC 140 vs TOA130 *DELETED* new [Re: Gregory]
      #4023819 - 09/03/10 09:21 AM

Post deleted by MAURITS

Post Extras: Print Post   Remind Me!   Notify Moderator  
MAURITS
scholastic sledgehammer


Reged: 09/22/09

Loc: Belgium
Re: AP 130 vs TEC 140 vs TOA130 new [Re: MAURITS]
      #4023820 - 09/03/10 09:22 AM

Quote:

If you use a 130mm (or 140mm) scope exclusively for
visual work, you will never see Pluto again.





Greg, what scope can do this?




Post Extras: Print Post   Remind Me!   Notify Moderator  
Adam S
scholastic sledgehammer
*****

Reged: 12/21/05

Loc: Gunnison, Colorado
Re: AP 130 vs TEC 140 vs TOA130 new [Re: LLEEGE]
      #4023828 - 09/03/10 09:27 AM

When I purchased my 130GT I too was told that Roland was producing 1 telescope per day by AP.

Post Extras: Print Post   Remind Me!   Notify Moderator  
MrGrytt
scholastic sledgehammer


Reged: 07/28/05

Loc: Upstate New York
Re: AP 130 vs TEC 140 vs TOA130 new [Re: joelwhicker]
      #4023857 - 09/03/10 09:48 AM

Quote:

Think he did...Message number 51135 in the apug on Yahoo.




That is really good news. There are quite a number of us out here who are working on our 11th year of waiting for a call on the bigger stuff.

Harvey


Post Extras: Print Post   Remind Me!   Notify Moderator  
jrbarnett
Eyepiece Hooligan
*****

Reged: 02/28/06

Loc: Petaluma, CA
Re: AP 130 vs TEC 140 vs TOA130 new [Re: t.r.]
      #4024337 - 09/03/10 02:28 PM

The materials needed to make quality 160mm scopes is much scarcer than the materials needed to make quality 130mm scopes. I suspect that the number of suitable 160mm blanks for A-P's 160mm design is very small and that such blanks are very costly. Notice that Yuri uses inexpensive FPL-51 or fluorite in his 160s, rather than lowest dispersion ED glass that Rolando seems to favor.

Regards,

Jim


Post Extras: Print Post   Remind Me!   Notify Moderator  
HCR32
sage


Reged: 08/27/10

Loc: Australia
Re: AP 130 vs TEC 140 vs TOA130 new [Re: Adam S]
      #4025588 - 09/04/10 06:30 AM

If he is producing 1 scope a day then I can never see him catch up to the numbers of demand he is getting.

Post Extras: Print Post   Remind Me!   Notify Moderator  
t.r.
Post Laureate
*****

Reged: 02/14/08

Loc: Upstate NY
Re: AP 130 vs TEC 140 vs TOA130 [Re: HCR32]
      #4025618 - 09/04/10 07:30 AM

Precisely!

Post Extras: Print Post   Remind Me!   Notify Moderator  
Danno2006
Pooh-Bah


Reged: 01/25/06

Loc: Ontario, Canada
Re: AP 130 vs TEC 140 vs TOA130 new [Re: HCR32]
      #4025777 - 09/04/10 09:51 AM

Quote:

If he is producing 1 scope a day then I can never see him catch up to the numbers of demand he is getting.




I am not so sure - I would want to see the back log vs. the 1 per day production and do some calculations.

Never is a long time.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Jaxdialation
Post Laureate
*****

Reged: 04/01/07

Loc: Northeast, FL
Re: AP 130 vs TEC 140 vs TOA130 [Re: Danno2006]
      #4025954 - 09/04/10 11:28 AM

Wouldn't it be great to be able to do those calculations ?!?

Of course the other alternative would be for AP to do it for us and provide a delivery estimate. Since they now have years of experience with their backlog list and who actually buys and who passes, it would seem to be within their reach to add some clarity to this. Or just say "at current production rates, and backlog "hit" rates" we will be caught up in X time."

Now back to reality.


Post Extras: Print Post   Remind Me!   Notify Moderator  
t.r.
Post Laureate
*****

Reged: 02/14/08

Loc: Upstate NY
Re: AP 130 vs TEC 140 vs TOA130 [Re: HCR32]
      #4025959 - 09/04/10 11:29 AM

Quote:

I can never see him catch up to the numbers of demand he is getting.




You took never out of context...Rolando personally making the scopes before he retires I think is the jist of it.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | 3 | 4 | (show all)


Extra information
40 registered and 38 anonymous users are browsing this forum.

Moderator:  Scott in NC, FirstSight, panhard, star drop 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 8303

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics