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Re: 6" achromat   Message List  
Reply | Forward Message #29794 of 30168 |
Re: [Refractors] Re: 6" achromat

You didn't read the post very carefully, Bud.

I said near perfect... "all but eliminated".

Don't be confused, Bud. This isn't brain surgery, this is fun.

Have a great life!

Take care,

Tony

Bud Starison wrote:
>
>
> Anthony Tripodi wrote:
> > I agree with Mr. Wodaski. And, no, you don't have to be the designer of
> > a 'scope to interpret a star test accurately. You do have to know what
> > you're doing.
> >
>
> You're confusing me Tony, on the one hand you say your Tak star tests
> perfect, but OTOH all these other people on the Tak group say theirs
> does not, and that this is normal. I do not see how both can be true.
>
> On the one hand you say that you agree with Mr. Wodaski, but Mr. Wodaski
> and others said that you had to know the exact particulars of a design
> and how it worked before you could know how to interpret the star test,
> but above you disagree with that after saying you agree with it!
>
> Regards,
>
> Bud
>
>


[Non-text portions of this message have been removed]




Tue Jul 14, 2009 10:14 pm

atripodi2000
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Message #29794 of 30168 |
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... You're confusing me Tony, on the one hand you say your Tak star tests perfect, but OTOH all these other people on the Tak group say theirs does not, and...
Bud Starison
starbuddy84
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Jul 14, 2009
7:52 pm

You didn't read the post very carefully, Bud. I said near perfect... "all but eliminated". Don't be confused, Bud. This isn't brain surgery, this is fun. Have...
Anthony Tripodi
atripodi2000
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Jul 14, 2009
10:15 pm

... What I was referring to was the fact that your star test was no where near as skewed (or wasn't even considered off enough to be consider skewed at all!)...
Bud Starison
starbuddy84
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Jul 15, 2009
12:50 am

A 5" at $9,000? Hell, I'd get the TOA 150 and pocket a couple hundred in change. But it makes the FS128 or the Pentax 125 look like an even better deal....
gnowellsct
Offline Send Email
Jul 14, 2009
12:36 am

While I feel that Vic makes great scopes - based on the posts from his group, I don't consider his pricing or products - leading edge in either price or...
Warp
warpedcorp
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Jul 13, 2009
10:58 pm

Agreed, Warp, 100%. Doug ... -- Doug Truckstop Astronomer [Non-text portions of this message have been removed]...
Doug
truckstopast...
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Jul 13, 2009
10:59 pm

... I think your estimate of 99.90% is way off, and there is a way we can find out. Clear skies, Alan...
Alan French
alandfrench
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Jul 13, 2009
11:04 pm

All I know... is that at the last 3 public gatherings I was at... there were an assortment of bigger and more expensive scopes including a 12 foot long D&G -...
Warp
warpedcorp
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Jul 13, 2009
11:22 pm

Hey, Not to argue the point, but the ES website describes that 127's objective as containing a Hoya ED element and call the scope "...an air-spaced triplet ED...
Perry Holcomb
hpholcomb
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Jul 14, 2009
12:12 am

... Astro-Physics, Takahashi, Telescope Engineering Company, APM, Tele Vue, and many others offer ED APO refractors. John C....
John
jrcrilly
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Jul 14, 2009
12:17 am

Terminology is a source of mystery to me. My Vixen f/6.5 SS102 I am content to call an ED doublet. And it proclaims itself ED in big letters on the dew...
gnowellsct
Offline Send Email
Jul 14, 2009
12:50 am

... Many refractors were sold as APO fifteen years ago that probably wouldn't be so labeled if sold today. My FS-128 is one, and my 178ED is another. Early...
John
jrcrilly
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Jul 14, 2009
1:06 am

As you probably know, ED stands for Extra-low Dispersion. Any modern apochromat almost certainly uses an ED element, either fluorite or a fluorcrown. Some...
Alan French
alandfrench
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Jul 14, 2009
12:27 am

... Does anyone know what kind of glass that Hoya element equates to in the Schott catalog? ... There are all kinds of "apos" out there, just throw 3 lenses in...
Bud Starison
starbuddy84
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Jul 14, 2009
2:11 am

Most likley because they are not experienced enough to know what is going on?  On one side of focus you are looking through turbulent air and the other side...
chris provost
lineman_16735
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Jul 14, 2009
2:17 am

... That's what I thought Chris, but you sure could fool them! Many reported really skewed star tests and ain't the least bit phased by it all. I think Rod...
Bud Starison
starbuddy84
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Jul 14, 2009
2:42 am

I agree there are all kinds of "apos" out there.  As you know though they can and most likely will fail to meet the debated definition of an apo though.  The...
chris provost
lineman_16735
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Jul 14, 2009
2:38 am

Hey, Didn't the Tak Sky 90 II have problems holding collimation?  Or were those folks just lyin'?  Or was I jus hallooseinatin' from hittin' the coolaide? ...
Perry Holcomb
hpholcomb
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Jul 14, 2009
3:53 am

Warp: While your comments are interesting, I have to say that comparing a SV or TV with "Explore Scientific" is not fair - I highly doubt that many of these...
Darren Hennig
doktorphoton
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Jul 14, 2009
4:13 am

If I think it through when I say an 8" apo is not cost effective it is a purely personal declaration of what size apertures I would like to have and what I'm...
cpiper007@...
cpiper700
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Jul 14, 2009
5:06 am
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