Cracked C8 corrector ughhhhh

Hi all:

I bought an older model C8 for $700 as it was my B-Day Aug.16 but
pretty much everything was all moldy
even the mirror,corrector,eyepieces,and tripod & wedge. Anyway , I
removed the screws holding the ring
that holds the corrector,they were really tight! I had to use a
screwdriver to pop the ring off. So that being done
I was so careful on cleaning the corrector then after the cleaning I put
it back on and began to tighten the ring. I
turned the screw near were the number is etched in and the small piece
of cork is there to keep the corrector
from touching the metal, as I tightened that screw I heard the awful
CRACK!!! I got sick to say the least.....so now
as you can see from the image I have a crack from the edge to the
secondary. What a way to loose $700!

Anyway, I had all the screws in and tightened,so that night I looked at
a few stars and Jupiter and the
nights we had clear even looking at the Moon,Mars,and Venus at 4am one
morning. Well, this is the unusual
part ALL the images were sharp and crystal clear.Jupiter showed colorful
belts and a festoon,the moon's
showed DISKS!!. Mars was gibbous and a dark marking and bright area was
seen,Venus was bland as Gibbous.
The Moon was awesome! the craters and other details were mind
blowing,double stars were split and they showed
the airy disk!

I contacted Celestron and at first they said I could buy a corrector
for $395 US then in their next email they said the scope would have to
go back and a tech would need to determine
if it could be fixed then if I declined because of high cost I still
would have to pay shipping back!

The main thing is as so observers told me is to use it like it was not
broken until it does crash...when..who knows...but to see that
detail...well enjoy it.

My main concern is I am just wondering what *might* happen when I let
the scope cool down etc..the expansion/contraction may strain it more?
plus taking it out in a car to a site..wonder if
any damage would occur.? I note that even with the full aperture solar
filter that came with it there is some warmth when the filter is
taken off so I just wonder if that could do something later on. Most say
that the crack cannot go anywhere as it is at a bigger hole (secondary)
basically the old way to prevent further cracking was to drill a small
hole near the end of the crack and that somehow prevents it from going
anywhere.

After 49 years of astronomy I forget to just finger tight screws!

Mike

What a fool !


I bought an older model C8 for $700 as it was my B-Day Aug.16 but pretty
much everything was all moldy
even the mirror,corrector,eyepieces,and tripod & wedge. Anyway , I removed
the screws holding the ring
that holds the corrector,they were really tight! I had to use a
screwdriver to pop the ring off. So that being done
I was so careful on cleaning the corrector then after the cleaning I put
it back on and began to tighten the ring. I
turned the screw near were the number is etched in and the small piece of
cork is there to keep the corrector
from touching the metal, as I tightened that screw I heard the awful
CRACK!!! I got sick to say the least.....so now
as you can see from the image I have a crack from the edge to the
secondary. What a way to loose $700!

Anyway, I had all the screws in and tightened,so that night I looked at a
few stars and Jupiter and the
nights we had clear even looking at the Moon,Mars,and Venus at 4am one
morning. Well, this is the unusual
part ALL the images were sharp and crystal clear.Jupiter showed colorful
belts and a festoon,the moon's
showed DISKS!!. Mars was gibbous and a dark marking and bright area was
seen,Venus was bland as Gibbous.
The Moon was awesome! the craters and other details were mind
blowing,double stars were split and they showed
the airy disk!

I contacted Celestron and at first they said I could buy a corrector
for $395 US then in their next email they said the scope would have to go
back and a tech would need to determine
if it could be fixed then if I declined because of high cost I still would
have to pay shipping back!

The main thing is as so observers told me is to use it like it was not
broken until it does crash...when..who knows...but to see that
detail...well enjoy it.

My main concern is I am just wondering what *might* happen when I let the
scope cool down etc..the expansion/contraction may strain it more? plus
taking it out in a car to a site..wonder if
any damage would occur.? I note that even with the full aperture solar
filter that came with it there is some warmth when the filter is
taken off so I just wonder if that could do something later on. Most say
that the crack cannot go anywhere as it is at a bigger hole (secondary)
basically the old way to prevent further cracking was to drill a small
hole near the end of the crack and that somehow prevents it from going
anywhere.

After 49 years of astronomy I forget to just finger tight screws!

Mike

On Aug 20, 9:20*pm, Michael Boschat wrote:

as you can see from the image I have a crack from the edge to the
secondary. What a way to loose $700!

part ALL the images were sharp and crystal clear.Jupiter showed colorful
belts and a festoon,the moon's

Well, you are now the owner of an effraction limited scope. Not so bad
it seems.

..

The Qurân is revelation from Allah
What you are about to read might sound unusual but it could be very
enlightened.

The Qurân is revelation from Allah


Revelation is where Allah imparts whatever knowledge He wills to
those whom He chooses to receive it. Allah gives this knowledge to
them in order for them to convey it to whomever else He wishes.
All the Messengers of Allah experienced revelation. Allah says:
Verily, We have sent Revelation to you (O Muhammad) as We have sent
Revelation to Noah and the prophets who came after him. We had sent
revelation to Abraham, Ishmael, Isaac, Jacob, the Tribes, Jesus, Job,
Jonah, Aaron, and Solomon. And to David We gave the Psalms. And
Messengers We have told you about before, and Messengers We have not
told you about – and to Moses We spoke directly.


The possibility of divine revelation cannot be denied by anyone who
believes in the existence of Allah and in His omnipotence. Allah
maintains His creation in any manner that pleases Him. The connection
between the Creator and his Creation is by way of His Messengers, and
these Messengers only know what Allah wants from them by way of
revelation, either directly or indirectly. The rational mind cannot
dismiss the possibility of revelation, since nothing is difficult for
the all-powerful Creator. The Nature of Revelation Revelation is not a
personal experience that a Prophet brings forth from within himself.
It is not a spiritual state that a person can attain by doing certain
meditations or spiritual exercises. Quite the contrary, revelation is
a communication between two beings: one that speaks, commands, and
gives, and another who is addressed, commanded, and receives. Prophet
Muhammad (peace be upon him) – as with every Prophet – never confused
himself with the One who gave the revelation to him. As a human being,
he felt his weakness before Allah, feared Allah’s wrath if he should
disobey, and hoped for Allah’s mercy. He sought help from Allah,
submitted to what he was commanded to do, and was on occasion even
sternly reprimanded by Allah. The Prophet (peace be upon him) admitted
his absolute inability to alter even one word of Allah’s Book. Allah
says: And when Our clear signs are recited to them, those who hope not
for a meeting with Us say: `Bring a Qur’ân other than this or change
it.’ Say (O Muhammad): `It is not for me to change it of my own
accord. I only follow what is revealed to me. I fear, if I were to
disobey my Lord, the punishment of an awful day.’ Say: `If Allah had
willed, I would not have recited it to you nor would He have made it
known to you. I have lived with you a whole lifetime before it came to
me. Have you no sense?’ This should make perfectly clear the
difference between the essence, attributes, and ways of the Creator
and those of His Creation. The Prophet (peace be upon him) took great
care to maintain a distinction between his own speech (the Hadîth) and
the direct speech of Allah, though both were the result of revelation.
For this reason, in the early period of revelation, he used to
prohibit anything that he uttered to be written down except for the
Qur’ân. This preserved for the Qur’ân its distinctiveness as being the
very word of Allah, unmixed with the speech of people. The Prophet
(peace be upon him) would also make a distinction in his own speech
between his own opinions and what came from Allah as revelation. He
said: "I am only a human being like yourselves. Opinions can be right
or wrong. But, when I say to you that Allah said something, then know
that I will never attribute something false to Allah." The Prophet
(peace be upon him) had no hand in the revelation that he received.
Revelation is a force external to the being of the Prophet (peace be
upon him). He was not able to manipulate it in any way. This is
supported by the fact that certain crises would befall the Prophet
(peace be upon him) or one of those around him that required an
immediate solution, but he found no verse of Qur’ân to recite to the
people. He had to remain silent and wait, sometimes in desperation,
until Allah, in His wisdom, revealed what was needed. A good example
of this is the time when `A’ishah, the wife of the Prophet (peace be
upon him) was accused of adultery by some of the hypocrites, though
she was innocent. People began to say things that were painful for the
Prophet (peace be upon him) until his heart was about to burst. He was
unable to prohibit this. All he could say was: "O `A’ishah, I have
heard this or that. If you are innocent, then Allah will show your
innocence, and if you fell into sin, then seek Allah’s forgiveness." A
whole month passed like this before the revelation came down declaring
`A’ishah’s innocence and exonerating the household of the Prophet
(peace be upon him). In brief, revelation has nothing to do with the
choices and wishes of the one who receives it. It is an unusual,
external occurrence. It is a force of knowledge, because it gives
knowledge. It is free from error. It comes only with the truth and
guides only to what is right
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Michael Boschat wrote in news:h6k7ir$849$1@Kil-nws-
1.UCIS.Dal.Ca:

Hi all:

I bought an older model C8 for $700 as it was my B-Day Aug.16 but
pretty much everything was all moldy
even the mirror,corrector,eyepieces,and tripod & wedge. Anyway , I
removed the screws holding the ring
that holds the corrector,they were really tight! I had to use a
screwdriver to pop the ring off. So that being done
I was so careful on cleaning the corrector then after the cleaning I put
it back on and began to tighten the ring. I
turned the screw near were the number is etched in and the small piece
of cork is there to keep the corrector
from touching the metal, as I tightened that screw I heard the awful
CRACK!!! I got sick to say the least.....so now
as you can see from the image I have a crack from the edge to the
secondary. What a way to loose $700!


I did that trying to remove a corrector from a scientific (ice depth
measuring) machine. It had over 1000 screws in it.

Hi Mike,

Sorry to read about your accident ... OUCH! But, it happens to
everyone, sooner or later. You might want to try placing a piece of
thin black tape across the crack to stabilize it and prevent any
further damage. You could also extend the tape, in an X-pattern across
the corrector, to simulate the vanes of a secondary holder. A number
of astrophotograpers use a like method to get diffraction spikes on
their star images. The amount of light loss is very minimal, probably
totally undetectable visually, and you won't have to look at the
crack. BTW, I'm not surprised the performance of the scope is still
good. The corrector plate is held very accurately and unstressed ....
hopefully .... in it's cell, so a crack across it shouldn't have much
of an optical effect. But, the value on the OTA is pretty much gone.

On Aug 20, 3:20*pm, Michael Boschat wrote:
Hi all:

* I bought an older model C8 for $700 as it was my B-Day Aug.16 but
pretty much everything was all moldy
even the mirror,corrector,eyepieces,and tripod & wedge. Anyway , I
removed the screws holding the ring
that holds the corrector,they were really tight! I had to use a
screwdriver to pop the ring off. So that being done
I was so careful on cleaning the corrector then after the cleaning I put
it back on and began to tighten the ring. I
turned the screw near were the number is etched in and the small piece
of cork is there to keep the corrector
from touching the metal, as I tightened that screw I heard the awful
CRACK!!! *I got sick to say the least.....so now
as you can see from the image I have a crack from the edge to the
secondary. What a way to loose $700!

Anyway, I had all the screws in and tightened,so that night I looked at
a few stars and Jupiter and the
nights we had clear even looking at the Moon,Mars,and Venus at 4am one
morning. Well, this is the unusual
part ALL the images were sharp and crystal clear.Jupiter showed colorful
belts and a festoon,the moon's
showed DISKS!!. Mars was gibbous and a dark marking and bright area was
seen,Venus was bland as Gibbous.
The Moon was awesome! the craters and other details were mind
blowing,double stars were split and they showed
the airy disk!

* I contacted Celestron and at first they said I could buy a corrector
for $395 US then in their next email they said the scope would have to
go back and a tech would need to determine
if it could be fixed then if I declined because of high cost I still
would have to pay shipping back!

The main thing is as so observers told me is to use it like it was not
broken until it does crash...when..who knows...but to see that
detail...well enjoy it.

My main concern is I am just wondering what *might* happen when I let
the scope cool down etc..the expansion/contraction may strain it more?
plus taking it out in a car to a site..wonder if
any damage would occur.? I note that even with the full aperture solar
filter that came with it there is some warmth when the filter is
taken off so I just wonder if that could do something later on. Most say
that the crack cannot go anywhere as it is at a bigger hole (secondary)
basically the old way to prevent further cracking was to drill a small
hole near the end of the crack and that somehow prevents it from going
anywhere.

After 49 years of astronomy I forget to just finger tight screws!

Mike