SingAstro

Hi guys, my scope is celestron C8NGT so it has a f/5. For f/5 wise it should not be so strict during the collimation process. After my collimation on the laser I use it to do a trial on the scope, insert into the focuser and screw the locking screws to a secure tightness so that I am still able to r...

Hi, can you elaborate or explain what you mean by "got a result of laser dots landing around 3mm..." Hi, yes my mistake for not explaining more on how I perform the collimation. I stick a piece of paper around 2.5m away from the laser source, by diy a fixture so that the laser collimator ...

Guys, i am doing my collimation for my new 8" but found out my laser collimator was actually out of collimation. Now, i did the collimation for this device and got a result of laser dots landing around 3mm and placing my collimator from a wall of 2.5m, is this make a satisfactory collimation st...

recently got a new OTA hence trying to sell away the 9x50 finder that comes with it. Letting go at $150, anyone interested for this finder pls text me




Thomas
nine187nine641

Hi Orly_andico

Noted on your suggestion.......thanks!!!

hi guys, really appreciate for your advice. The factor which lure me towards the f/3.9 scope is actually not the f/ratio but is actually on its focuser. It come with a crayford focuser with the OTA. Because of this focuser so i am enquiry what will be the difference for seeing with f3.9 and f5. As y...

You may find your answers here: What is the focal ratio? How is it related to the f-stop? http://www.celestron.com/c3/support3/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=1650 Read the Focal Ratio segment in this article: http://www.astropix.com/GADC/SAMPLE2/SAMPLE2.HTM Thanks Gar...

I still having doubts between the difference in visually seeing between a fast scope and slower one. Can anyone guide ? Thks.

Hi hazel Many years back I used my 50mm and it gave me saturn and its ring, jupiter and cloud bands, crescent venus etc etc..... Perhap if you are very serious into this hobby and would like to get deeper into it then I would suggest you to get a bigger aperture you can afford. But of you have limit...

By any chance anyone is letting go a 8inch newtonian ota??

Thomas
Nine187nine641