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Heyyy its me again! Today me and my friend went out to observe! We spotted the moon and focused on it,took some okay pictures with my phone without an adapter( that means having to hold up my phone over the eyepiece 's tiny  hole). Then we tried moving towards mars, relatively close to the moon. It wanst a dot but like a small circle with some colour, afterwards we moved towards stars,but instead of seeing these circles with the secondary s reflection in the middle, we saw small circles (like mars but smaller) they were green blue and red coloured i didn't think much of it but then i checked the mirror. And i saw some dust.... Pics bellow.Is it the mirror or is this normal? Also if its the mirror, how do i clean it without removing it, i have a celestron firstscope btw. 

Thanks.

IMG_20190113_202334.jpg

IMG_20190113_190302.jpg

IMG_20190113_190009.jpg

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From what I can see thats a perfectly normal amount of dust - just leave it, it wont affect your viewing and you could damage your mirrors finish trying to clean it.

Some telescopes have giant holes in the middle, and it doesnt affect the viewing so a few specks of dust will be fine ;)

 

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Thanks but can you explain what i saw? I sawSmall circles (blue green red colour) where stars are supposed to be. 

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Small circles with a dark centre are usually what an out of focus star looks like through a scope that has a secondary obstruction, like the newtonian does.

 

 

 

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I think the coloured dots are a photographic artifact,  I don't  expect a phone would be sensitive enough to show stars that close to the Moon. Ignore the dust on the mirror for the reasons already mentioned.      ?

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I m not talking about those.i m talking very small spread out ones (bigger than the ones shown in the picture with 3 small circles of red green  Blue  with a black circle where stars are supposed to be.

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Thanks Im looking towards one star but i see many small circles , thats normal right?

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Your scope looks normal but what you describe is not normal

What happens to the circles when you move the focuser in and out ?

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As dweller25 has implied, did you refocus the scope  after moving from the moon to Mars ? I'm assuming the circles that you mention are when you look through the eye piece and not on your camera/image.

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If it is just a focussing issue, the star will look something like the image in this post. This is a fairly extreme example, but will give you the general idea.

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Kronos831, I'd get your scope out again, point it at a star and use the focusing knob/wheel to bring the star to a pin point of light.

I think because you focused on the moon you may of thought you didn't need to refocusing again for stars.

Always check the focus when moving from target to target and especially when changing eye piece.

Let us know how you get on.

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