Posts Made By: Jong Min Choi

May 21, 2015 04:32 PM Forum: Equipment Talk

Decrease weight for GSO10RC OTA

Posted By Jong Min Choi

Hi.
I have plan to mount GSO10RC OTA on the Takahashi EM200 mount.
But if I mount 10RC OTA on EM200, it will exceed or approach maximum load capacity for EM200.
(I use QSI683WSG CCD with 5 filter wheel)
Anyway, for the more stable guide with 10RC, I have to decrease total weight.
So I have some question to decrease weight for my total system.
Please refer to below question and let me know yours advice.

1. GSO10RC have 2 losmandy dovetail plate (Upper side and lowerside)
-. If I do not use upper plate,(that mean, I use only bottom plate for mounting)
Dose it affect to OTA stiffness ??
(Both dovetail plate hold RC10 OTA with bolt assemble.
So I thought that maybe these plate also help to increase OTA stiffness)

2. To reduce load stress to mount, I also move down center of gravity of the OTA to close mount head.
-. To do this, I try to apply two tube rings.
Is it effective to reduce load stress ??
(I also hope it will be effective to reduce weight instead of using 2 dovetail.)

In the future, I will upgrade mount for more load capacity. But now I have no choice except my EM200 mount sad

Please give yours valuable information.

Thank you
Best regard JM.Choi

May 31, 2015 11:47 PM Forum: Mounts

Paramount MX+ VS AP1100GTO

Posted By Jong Min Choi

Hi.
I have question between Paramount MX+ and AP1100GTO
Actually I ordered AP1100GTO.
But some of my friends told me that Paramount is better than AP...
The reason, AP use some plastic gear in their gear box.
Is it true ???
I can not belive that because for supporting and stable tracking, all mechanical parts also have strong siffiness.
So if AP use plastic gear in ther gear box, their mount does not perfectly taacking...

Anway, is there someone who know whether AP mount use plasic gear or not ??

And another question..
Most of people say that if you use mount for astro photh, you should use 1/2 maximum payload.
Does it also apply AP mount too ??
(AP1100 payload : 110lbs) that mean, for stable tracking, limited payload will be 55lbs.. Am I correct ??


Last..
If you recoment for middle size mount between Paramount MX+ and AP1100, which mount is better ??


Thank you
BR JM.Choi