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6 replies to this topic

#1 LuckstedM

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Posted 21 August 2019 - 10:11 AM

New 8SE owner. I have found planetary observation quite jittery. I realize part of this is the low alt locations of Jupiter and Saturn right now, but my 4.5" reflector should not be giving me more stable views than the 8se. I've ordered vibration suppression  pads. Any other suggestions. Haven't had a chance to view a 1/4 moon yet.

How many 8se owners have added motor focusers  and how much did it alleviate the problem? 

Also wondering about Celestron 6.3 focal reducer/corrector. What viewing advantages would this provide? The scope I ordered comes with the 2" eyepiece kit, but these are backordered until mid September.

Posted last nights observations in beginners forum



#2 astro_1

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Posted 21 August 2019 - 10:24 AM

I have the 6SE and added a motorized focuser. Makes it way less jittery trying to focus.

 

I put a starlight feather touch/motor on it. Only drawback is  I lose the option of manual focus. Would have preferred a moonlight focuser  to keep manual focus an option, but not enough clearance on the 6SE.  Maybe the 8se would have enough space.



#3 nicoyenny

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Posted 21 August 2019 - 10:25 AM

Most of the time, shaking is byproduct of something not tight enough.

I have a similar OTA than yours , a C8, but on an equatorial mount, which makes m y mileage different than yours, but the principles are the same.

1- Make sure everything is tight, specially the tripod legs, the eyepiece holder/leg spreader must be pretty tight, a little lose and you have a shaky shaky shaky view ...

2- OTA properly secured to the dovetail holder ...

3- Avoid way too much magnification, not every night is good for high power seeing ...

4- don't touch the ocular (eyepiece) ...just saying ...

5- Timing ... early in the evening the atmosphere is releasing heat, you will notice it in the image quality and those annoying "heat waves" in front of your target ...

6- Open a saving account, then invest in a "better mount" (a suggestion, in the meantime use and abuse and enjoy your current mount)

Rest of the guys will have even better suggestions ...


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#4 sg6

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Posted 21 August 2019 - 11:20 AM

Going to be the mount, the standard one is at or over the limit for the OTA. They use the same mount for the 6SE as the 8SE. The 6 is a lot more stable.

 

The focal length doesn't help - the objects moves just over twice as much as when a 1000mm focal length scope is used.

 

Answers seem to be:

Don't touch scope or mount, don't touch focus adjustment and don't touch or use the eyepiece. shocked.gif shocked.gif

Wish you luck in your observing. grin.gif grin.gif grin.gif



#5 brisdob

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Posted 22 August 2019 - 10:26 PM

Vibration suppression pads will help.  I added the JMI focus motor and that was also a big help - slow to focus though - I use LVW eyepieces which are relatively par focal so that is less of an issue for me.  If you can find an old EQ5 tripod the legs are a straight swap and much more stable but a bit heavier.


Edited by brisdob, 22 August 2019 - 10:26 PM.


#6 Jim4321

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Posted 23 August 2019 - 04:30 PM

Rig yourself a low observing seat so you can keep the tripod legs as short as possible.  IIRC, the legs of the stock tripod are pretty long & spindly when fully extended.   As others have said, be sure all the bolts on the tripod are tight, and snug the spreader tray up very well each time.

 

Celestron makes a _much_ heavier duty tripod that I'm pretty sure fits the SE mount.  It's the same one they ship with the 9.25 Evolution, but I'm not sure of the model number.

 

Jim H.



#7 whizbang

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Posted 27 August 2019 - 09:13 AM

The CPC tripod used on the 9.25 EVO and 11" CPC is stouter than the SE tripod.

 

The Standard 6-8" EVO tripod is also stouter.

 

The reports on the internet are that the 8 is unmounted (shaky).

 

Get a hold of this guy ASAP:

 

https://www.cloudyni...pc-1100-tripod/


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