Re: (IAAC) Obj: M34 - Inst: Orion Optics 250MM F4.8 Vixen GP/DX

Hello Barry:

While I am no expert, I would imagine that overtightening the screw in 
question could stress the mirror enough to cause astigmatism; however, 
if too loose so that the mirror flops around that could cause a problem. 
If your assistant is experienced at telescope maintainence, I would 
imagine that he would know enough to correctly tighten the screw.

The person you were talking too was probably someone hired by a call 
center and working off a script. Much customer support work is now hired 
out to call centers, which are probably far removed in location from the 
company in question. The person working the lines is often someone hired 
at  minimum wage, given training in operating the computer system in use 
and in reading off a script, and has no real knowledge of the technical 
aspects of the product. They are probably trained to attempt to resolve 
the problem with as little cost to the company making the product as 
possible, and certainly not to admit any problem or defect. There may be 
someone available somewhere, if the caller is insistent enough to bump 
the complaint far enough up the chain. I worked in a call center for 
almost 3 year, and while the type of work we were doing was different, I 
have a pretty good idea who this works.

Undoubtedly, by doing this work you indeed have invalidated any 
warranty; however, if your scope now works fine no problem and you have 
avoided the hassle of returning the scope for work. However, if you had 
found the problem not fixable, you could have been in a bind, and not 
able to return your scope. Proceed with caution before operating on a 

William Schart

On Monday, January 21, 2002, at 08:53 AM, barry.sharpe@btinternet.com 

> Hi everyone,
> Perhaps someone can help me, I took my telescope to a member of our 
> local
> astronomical society. Who just happens to be a Dr of physics works at 
> our university. After repeated attempts at collimating my scope he 
> could not get it right. so he stripped my scope removed primary and 
> secondary mirrors. And found the offending item to be a nylon screw 
> that holds with 2 others the side of the mirror to be lose.
> he tightened it rebuilt the scope and collimated it no problems. 
> because it is a new scope he suggested i phone the makers and make a 
> little complaint. Whilst doing so the makers informed me that this was 
> incorrect and that what the gentlemen did may cause an astigmatism in 
> my mirror. And would have invalidated any warranty on my scope. Firstly 
> thier was a lot of play in the mirror so much so that if you moved the 
> scope you could feel the mirror move inside. The telescope makers claim 
> that this would not have affected the collimation. However i said surly 
> it must do because in effect if the mirror moves off center then the 
> collimation is bound to be affected. He denied this rather vermently 
> and told me that what we had done was wrong. The gentlemen that had 
> helped me is a long standing astronomer who lectures cosmology clases 
> and looks after all the obervatories as well as radio telescopes surly 
> he must know. my telescope since the rebuild is performing far better 
> than it ever did. Am i to worry i don't believe he tightened it 
> solidily just enougth to stop it moving around. Any thoughts would be 
> greatly appeciated.
> Barry
>> ----
>> Observation Poster: Barry Sharpe <barry.sharpe@btinternet.com>
>> Observer: Barry Sharpe
>> Your skills: Beginner (< one year)
>> Date/time of observation: 19th January 2002 19:30 UT
>> Location of site: Welwyn Garden City  (Lat 51:47:24 , Elev 0:10:45 )
>> Site classification: Suburban
>> Sky darkness: 7 <1-10 Scale (10 best)>
>> Seeing: 4 <1-10 Seeing Scale (10 best)>
>> Moon presence: Minor - crescent or far from object
>> Instrument: Orion Optics 250MM F4.8 Vixen GP/DX
>> Magnification: 25mm
>> Filter(s): None
>> Object(s): M34
>> Category: Open cluster.
>> Class:
>> Constellation: Per
>> Data: mag   size
>> Position: RA :  DEC :
>> Description:
>> M34 found nice open cluster near zenith, spread out cluster in 25mm. 
>> Many are
>> white stars suggesting young cluster stars fill FOV. One double in 
>> centre of FOV, 50  100 stars; quiet a few pairs of stars, nice 
>> pinpoints of light. Very
>> nice open cluster. could not discern any particular pattern but view 
>> was constantly interupteb by cloud.
>> --
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