Hello, Tiago; Good job informing others of the focuser issue. Your solution is similar to what I thought of. I would have tried to remove the draw tube from the focuser. Then I would have added flocking to the inside of the focuser to block the light. As mentioned by Phil Guilliatt (he said black velvet cloth) that would work too. I have a Dobsonian but I added a light blocking bowl to my focuser for visual. It blocks almost all light. It is a large plastic bowl, painted flat black, w/ a hole cut in the near the side. I put it on the draw tube so when I observe I have my face in the bowl. It blocks light from my face & partly from the sides. Have a GREAT day, Neighbor!
You have the commitment to the telescope, that's highly valuable. I wish i could take off my drawtube that time. I was looking at it to figure a way but i couldn't reach the way to do it. I also tried something larger, where i could position my head inside but i failed. That thing felt and moved a lot. It should be made in plastic to be stronger like yours, not with soft materials like what i used. At the end what's important is to solve the issue understanding better the instrument and improving it and get rid of that light intrusion. But i was lucky, they took the street led light and now only the moon has the power to generate light around me. Cheers!
In my case it wasn't stray light coming from the focuser, but tilt on it. This was more noticeable in galaxies than in other objects. Yesterday I posted on Astronomia Portugal and Skywatcher refractors and reflectors (facebook) the result of the before and after adjustment. I have a Skywatcher 150PDS Good videos and clear skies. No meu caso não era luz parasita vinda do focador, mas sim tilt nele. Tal notava-se mais nas galáxias que em outros objectos. Coloquei ontem no Astronomia Portugal e Skywatcher refractors and reflectors (facebook) o resultado do antes e depois do ajuste. O meu telescopio é um 150PDS da Skywatcher.
I have a 10 inch dobsonian. I try to observe the brightest star with my 32 mm eyepiece-- it kind of looks the same through the telescope as it would look from naked eye… where am i going wrong?
Hello, Tiago;
Good job informing others of the focuser issue.
Your solution is similar to what I thought of.
I would have tried to remove the draw tube from the focuser.
Then I would have added flocking to the inside of the focuser to block the light.
As mentioned by Phil Guilliatt (he said black velvet cloth) that would work too.
I have a Dobsonian but I added a light blocking bowl to my focuser for visual.
It blocks almost all light.
It is a large plastic bowl, painted flat black, w/ a hole cut in the near the side.
I put it on the draw tube so when I observe I have my face in the bowl.
It blocks light from my face & partly from the sides.
Have a GREAT day, Neighbor!
You have the commitment to the telescope, that's highly valuable. I wish i could take off my drawtube that time. I was looking at it to figure a way but i couldn't reach the way to do it. I also tried something larger, where i could position my head inside but i failed. That thing felt and moved a lot. It should be made in plastic to be stronger like yours, not with soft materials like what i used. At the end what's important is to solve the issue understanding better the instrument and improving it and get rid of that light intrusion. But i was lucky, they took the street led light and now only the moon has the power to generate light around me. Cheers!
Hello ,
Why my telescope shows double image? Do you recommend any solution for this? Or do you know any possible reasons for this issue?
Possibly it's out of focus/collimation but without all the info it's hard to diagnose
Many years ago I worked for Kodak making 135mm film the best way to keep light from exposing the film. is with thin black velvet cloth
In my case it wasn't stray light coming from the focuser, but tilt on it.
This was more noticeable in galaxies than in other objects. Yesterday I posted on Astronomia Portugal and Skywatcher refractors and reflectors (facebook) the result of the before and after adjustment. I have a Skywatcher 150PDS
Good videos and clear skies.
No meu caso não era luz parasita vinda do focador, mas sim tilt nele.
Tal notava-se mais nas galáxias que em outros objectos. Coloquei ontem no Astronomia Portugal e Skywatcher refractors and reflectors (facebook) o resultado do antes e depois do ajuste. O meu telescopio é um 150PDS da Skywatcher.
I have a 10 inch dobsonian. I try to observe the brightest star with my 32 mm eyepiece-- it kind of looks the same through the telescope as it would look from naked eye… where am i going wrong?
Hi Thakur. That may be that you are out of focus and have to turn the focuser knobs to one way or the other until you see a pinpoint star.
thanks for the tip! :-)
Happy to help!