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Equipment Discussions >> Refractors

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JDSherman
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Posts: 183
Loc: Central NJ, USA
Re: Anything about the Astro Tech 111 mm ? new [Re: Buzzer]
      #2182025 - 02/10/08 07:23 PM

Buzzer, I was going for the StellarVue 102 but those AT111 pics have me rethinking... *BLEEP*.

--------------------
Stellarvue 102ED (sn 0107)
NextStar 8i SE XLT
Astro Tech 66ED (Green) (sn 6680003)
Orion Atlas, AT Voyager
Denkmeier Powerswitch
3.2mm, 5mm BO/TMB Planetary, 7mm UWAN, 10mm Ultima, 16mm UWAN, 24mm Panoptic, 33mm SWAN, 40mm TMB Paragon
Orion Starshoot Pro


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blandp11
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Re: Anything about the Astro Tech 111 mm ? new [Re: Buzzer]
      #2182066 - 02/10/08 07:34 PM

Lotta blue bloat around those stars. Is this supposed to be an APO or is it just advertised as "ED"?

Philip

--------------------


Mostly refractors


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Strgazr27
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Re: Anything about the Astro Tech 111 mm ? new [Re: blandp11]
      #2182107 - 02/10/08 07:54 PM

Phillip,

It's the processing not the scope. If you look at the other pictures you'll see they don't suffer the same as the HH shot. I can tell you that I have not seen any false color either while imaging or when using the scope for the VERY limited time I used it visually.

This is also a very early processing job by Andy and he has learned a bit in the last few days.

CS's

--------------------
Bobby

StonyHill Observatory
Skywatcher EQ6 Pro (On it's way)
AT 130 F/6 Prototype
Royce 10" f/4 Astrograph (Under Construction)
Self Modded 40D
70-200 F2.8 L IS
SSAG

YAHOO TMB 130SS Group

Astronomy Technologies Yahoo Group


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AstronomicsAdministrator
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Re: Anything about the Astro Tech 111 mm ? new [Re: LLEEGE]
      #2182387 - 02/10/08 09:51 PM

On the 90mm the lenses in cell come from one manufacturer and the tube comes from another manufacturer. I would not really call threading a cell onto a tube assembly, but yes we do put them together. They then go through a test for collimation and will go to an interferometer.

Mike

--------------------
Michael Bieler

I live vicariously through myself.

Father and Husband

Owner
www.astronomics.com
www.astronomytechnologies.com
www.cloudynights.com


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KWB
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Re: Anything about the Astro Tech 111 mm ? new [Re: Astronomics]
      #2182931 - 02/11/08 03:31 AM

The image of Comet Holmes is awesome. This scope has truely impressed me with these images. I would have thought this triplet and the 80EDT would have been sweet for visual purposes only. I'm learning something new here. Thanks Buzzer and Bobby.

--------------------
Kenny


"Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe." - Albert Einstein











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waterskies
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Reged: 08/18/07
Posts: 93
Re: Anything about the Astro Tech 111 mm ? new [Re: Astronomics]
      #2183245 - 02/11/08 09:59 AM

So they are supplied with an interferometric report? Wow, that is cool to know how good one's lens really is!

What is the average you guarantee? What happens to the ones that do not meet your standards? Can you sell them to at lower price?



Quote:

On the 90mm the lenses in cell come from one manufacturer and the tube comes from another manufacturer. I would not really call threading a cell onto a tube assembly, but yes we do put them together. They then go through a test for collimation and will go to an interferometer.

Mike




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AstronomicsAdministrator
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Re: Anything about the Astro Tech 111 mm ? new [Re: waterskies]
      #2183294 - 02/11/08 10:34 AM

Not supplied with a report. We don't want people complaining that theres is not as good as another random piece even though they are above the minimums. For this reason alone, Tom Back quit suppling the reports with his scopes he sold in the US. This is for our own piece of mind.

--------------------
Michael Bieler

I live vicariously through myself.

Father and Husband

Owner
www.astronomics.com
www.astronomytechnologies.com
www.cloudynights.com


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jonnyastro
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Re: Anything about the Astro Tech 111 mm ? new [Re: Astronomics]
      #2183527 - 02/11/08 12:26 PM

Quote:

The 111 and 80mm scopes are to different animals and two differnet designs. Tom Back designed the 111mm.




I understand that TMB designed the 111, but who designed the lens for the 80?


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AstronomicsAdministrator
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Re: Anything about the Astro Tech 111 mm ? new [Re: jonnyastro]
      #2183530 - 02/11/08 12:28 PM

A lens designer of some sort. Who designs WO, SV, Celestron, or Meade?

--------------------
Michael Bieler

I live vicariously through myself.

Father and Husband

Owner
www.astronomics.com
www.astronomytechnologies.com
www.cloudynights.com


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LLEEGEModerator
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Re: Anything about the Astro Tech 111 mm ? new [Re: Astronomics]
      #2183540 - 02/11/08 12:33 PM

Quote:

We don't want people complaining that theres is not as good as another random piece even though they are above the minimums.




--------------------
"Okay! You draw the straws. I'm-a taking the parachute."



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jonnyastro
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Re: Anything about the Astro Tech 111 mm ? new [Re: Astronomics]
      #2183546 - 02/11/08 12:36 PM

Quote:

A lens designer of some sort. Who designs WO, SV, Celestron, or Meade?




Just asking Mike, don"t really see the problem with asking a simple question.


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AstronomicsAdministrator
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Re: Anything about the Astro Tech 111 mm ? new [Re: jonnyastro]
      #2183565 - 02/11/08 12:45 PM

I don't have an answer for you as the desinger. That's all, nothing more nothing less. I didn't mean any disrespect or to be short.

--------------------
Michael Bieler

I live vicariously through myself.

Father and Husband

Owner
www.astronomics.com
www.astronomytechnologies.com
www.cloudynights.com


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waterskies
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Reged: 08/18/07
Posts: 93
Re: Anything about the Astro Tech 111 mm ? new [Re: Astronomics]
      #2183787 - 02/11/08 02:35 PM

So we simply believe you that they are individually tested ?
What is your MINIMUM standard? What's the min. RMS surface wavelength I mean?

If the 111 is TMB designed, what is the difference then between the SS series and AT series? I did not find any info on the 111 on the website, and on Astronomics website (interesting it should be there but not on AT website!) there is no mention of TMB...

My specific concern is this:

-The TMB 92mm (triplet FPL-53 AND TMB design) costs $2000

-The AT 111mm (triplet, FPL-51 and TMB design + interferometrically tested) costs $ 1800

Comparing to other similar products on the market (SV,WO, Russian TMB) either, the 92mm costs TOO much, or the AT is a real bargain... or both!


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spaceydee
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Re: Anything about the Astro Tech 111 mm ? new [Re: waterskies]
      #2183830 - 02/11/08 02:55 PM

The Tak Sky90 is about 2K and so is the SV90T so I would not call the 92SS overpriced. The AT111 might be the bargain though.

--------------------
Dee
space-scientist
student violinist
Nexstar8i,SV80S,80/9D,FC100,94 Brandon,TMB92SS,GM8
8" f/7 Discovery,12.5" Portaball, PST



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frodriguez
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Re: Anything about the Astro Tech 111 mm ? new [Re: waterskies]
      #2183835 - 02/11/08 02:59 PM

That wasn't the best picture to take with the 111 and publish. It does look like blue bloat, although processing could account for much of it. I think reprocessing or a new picture is in order to mend all doubts.

--------------------
Francisco

TMB 100mm f/8 triplet apo
Universal Astronomics UniStar Deluxe w/ 7" saddle
Sokkia green heavy wood tripod
Televue 7mm Nagler T6
Televue 5mm Nagler T6
Televue 24mm Panoptic
Televue 2x barlow
Televue 2" Everbrite diagonal
Televue 2"-to-1.25" high-hat adapter for 2" diagonal
Stellarvue F50W2 9x50 RACI white deluxe finder
Astrozap Baader white-light solar filter
Baader 2" UHC-S filter


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Strgazr27
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Re: Anything about the Astro Tech 111 mm ? new [Re: frodriguez]
      #2183945 - 02/11/08 03:56 PM Attachment (65 downloads)

Quote:

That wasn't the best picture to take with the 111 and publish. It does look like blue bloat, although processing could account for much of it. I think reprocessing or a new picture is in order to mend all doubts.




Here is the SAME image redone. If you look at the original post it's quite easy to see several mistakes made. As I said before Andy has come A LONG way in the past 2 months as far as processing goes. This was one of his first serious images. That is not a dig against Andy at all. The black point is severely clipped and the saturation has been turned up to bring out the colors and some detail. There has also been too much noise reduction applied to it. All of these factors contribute to the image he originally posted. Take a look at his M51 shot, the Homes shot which made it into Astronomy magazine last month or his M81/82 Image Here . I don't see any blue bloat visible. Notice the difference in his processing skills.

The TMB92SS is not over priced and is actually a very good deal considering what you will get when they arrive.

The 111 looks to be a phenomenal deal. I'm surprised that noone has commented on how flat the field is with the 111. There is VERY little curvature present. This is not easy to do with a triplet design.

I also don't see anybody "Dancing around the issues" as has been implied. It's funny, the TMB130SS went through the same ringer when it was first released and look now. IF you can find one for sale they command the same price as when bought new and have gotten nothing but rave reviews comparing them to any 130-140mm scope available.

CS's

--------------------
Bobby

StonyHill Observatory
Skywatcher EQ6 Pro (On it's way)
AT 130 F/6 Prototype
Royce 10" f/4 Astrograph (Under Construction)
Self Modded 40D
70-200 F2.8 L IS
SSAG

YAHOO TMB 130SS Group

Astronomy Technologies Yahoo Group


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frodriguez
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Re: Anything about the Astro Tech 111 mm ? new [Re: Strgazr27]
      #2183957 - 02/11/08 04:04 PM

no blue left in the image...

--------------------
Francisco

TMB 100mm f/8 triplet apo
Universal Astronomics UniStar Deluxe w/ 7" saddle
Sokkia green heavy wood tripod
Televue 7mm Nagler T6
Televue 5mm Nagler T6
Televue 24mm Panoptic
Televue 2x barlow
Televue 2" Everbrite diagonal
Televue 2"-to-1.25" high-hat adapter for 2" diagonal
Stellarvue F50W2 9x50 RACI white deluxe finder
Astrozap Baader white-light solar filter
Baader 2" UHC-S filter


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Clive Gibbons
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Re: Anything about the Astro Tech 111 mm ? new [Re: LLEEGE]
      #2183959 - 02/11/08 04:06 PM

Quote:

Quote:

We don't want people complaining that theres is not as good as another random piece even though they are above the minimums.







I recall somebody bringing up a similar question about A-P refractors many years ago. Roland didn't include the P-V wave rating or Strehl for scopes he shipped.
Just an assurance that they'd be at least as good as a particular rating (1/8 wave at the wavefront?).
Some other vendors were selling brands which included individual certificates.
IIRC, Roland explained that he didn't provide individual wave ratings for each scope, for basically the same reason Astronomics mentioned.

--------------------


A few telescopes of dubious value.
Understanding wife, two curious cats and one sadly departed.

"Semper ubi sub ubi"


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LLEEGEModerator
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Re: Anything about the Astro Tech 111 mm ? new [Re: Clive Gibbons]
      #2183985 - 02/11/08 04:18 PM

Quote:

Quote:

Quote:

We don't want people complaining that theres is not as good as another random piece even though they are above the minimums.







I recall somebody bringing up a similar question about A-P refractors many years ago. Roland didn't include the P-V wave rating or Strehl for scopes he shipped.
Just an assurance that they'd be at least as good as a particular rating (1/8 wave at the wavefront?).
Some other vendors were selling brands which included individual certificates.
IIRC, Roland explained that he didn't provide individual wave ratings for each scope, for basically the same reason Astronomics mentioned.


But they do provide a minimum. And I'm not criticizing anyone who does or doesn't.
It is a delicate dance, one must perform, when they manufacture and sell telescopes.

--------------------
"Okay! You draw the straws. I'm-a taking the parachute."



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LLEEGEModerator
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Re: Anything about the Astro Tech 111 mm ? new [Re: frodriguez]
      #2183991 - 02/11/08 04:19 PM

Quote:

no blue left in the image...



That's the blue bloat PS action tool.

--------------------
"Okay! You draw the straws. I'm-a taking the parachute."



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