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Focus issues with 1100 Edge HD ( collimation ? )

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11 replies to this topic

#1 cjtorralba

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Posted Yesterday, 12:57 AM

So, I thought I would try out my new mount a few months after getting it. Go figure. Was planning on viewing Jupiter and Saturn just for a quick setup and to familiarize myself with the CGX-L mount.

Well the evening was a disaster. No matter what I do, I can not get the **** thing to focus! Tried 4 different eye pieces without any luck. I cannot even get to focus on the moon. I just don't get it. Just using the star diagonal and a 10, 14, 30 and what ever was on my finder scope. Last time I used the telescope it focused just fine. What the heck could be going on?

Thanks

Edited by cjtorralba, Yesterday, 03:59 PM.


#2 MikiSJ

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Posted Yesterday, 01:17 AM

I also have a C11 EdgeHD. Could it be that you have the mirror locked down? Have you run the focuser to each end point?



#3 cjtorralba

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Posted Yesterday, 01:22 AM

Yea. spent a minute rotating the focus knob. I am going to have a quick look at turning the two mirror locks all the way out. although i cant see that being the problem because i see it trying to focus. it just cant get there.



#4 Whichwayisnorth

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Posted Yesterday, 01:41 AM

Try it during the day time on a object far away.

 

Loosen the eyepiece or diagonal and slide it out slowly.  See if it is perhaps a back focus issue.



#5 cjtorralba

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Posted Yesterday, 02:19 AM

I am thinking it may be a collimation issue :(



#6 Cpk133

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Posted Yesterday, 07:15 AM

Forgive me for asking the obvious question anytime someone with an SCT has focus issues:

 

"Did you recently install a new finder or guide scope?"

 

Sometimes people use bolts that are a little too long and they end up acting like a hard stop for the mirror.  If it's collimation, it must be pretty bad and would be very obvious with a little defocus on a star.

 

Good luck.


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#7 cjtorralba

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Posted Yesterday, 10:17 AM

No new attachments.



#8 Bill Barlow

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Posted Yesterday, 11:34 AM

Could one of the corrective lenses in the baffle tube be out of alignment? 



#9 decep

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Posted Yesterday, 11:58 AM

Did you take the scope out of an air conditioned environment outside in the humidity? It sounds like the internal corrector lens fogged up.

#10 cjtorralba

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Posted Yesterday, 04:02 PM

it was out for hours.

I looked at the daytime collimation article and decided to at least check it out and see what my situation is.

Have a look at this photo. I think i captured it best I could.


https://photos.app.g...gYhCW7GYiuPa2aA

#11 cjtorralba

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Posted Yesterday, 04:07 PM

And here is a video showing how I aligned myself and camera to view the test.


https://photos.app.g...2VmBkWYVdPTy1j8

#12 Ben Diss

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Posted Today, 07:32 AM

The primary mirror moves as you focus. Run the focuser all the way to one stop. Look at the mirror. Run it to the other stop. Look at the mirror. Did it move? You'll need to shine a light inside and look for some kind of reference. Alternatively, have someone else move the focus while you peek inside.




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