Reflector telescope and star atlas

[nwink]

Question about Reflector telescope & star atlas: so when I look at the view through a reflector telescope, is it basically rotated 180-deg from the correct view? Meaning, when I read a star atlas, do I just need to flip the atlas 180-deg (upside down) to use it with the view through the reflector?

[jambouk]

http://www.manualslib.com/manual/26549/Celestron-Starseeker.html?page=18

[jambouk]

reflector, sorry:

http://www.telescopes.com/telescopes/imageorientationwhyiseverythingupsidedownarticle.cfm

James

[nwink]

So what's the answer?

[nwink]

It's not rotated but upside down, right?

[Peter Drew]

An image in a reflector is upside down and horizontally reversed.    

[jambouk]

You just have to work out what works best for you. I find it easier to keep the map the correct way up, but know my adjustments need to be the opposite way. It comes with time and quite quickly. There is also a good article in Sky & Telescope:

http://www.skyandtelescope.com/astronomy-resources/using-a-map-at-the-telescope/

James

[nwink]

The reason I'm confused is that the introductory chapter in Turn Left At Orion doesn't show the view correctly...it shows it as rotated 180-deg.

[jambouk]

Just rotated, no mirror image involved.

reflector view.pdf

[jambouk]

so, if you wanted to move the scope from the "n" to the dot of the "i", instead of going up and right, you need to move the scope down and left... does that make sense?

[DeepSkyBagger]

so, if you wanted to move the scope from the "n" to the dot of the "i", instead of going up and right, you need to move the scope down and left... does that make sense?

Not when there are two 'n's! 

[glass]

I read somewhere all you have to do with a reflector telescope to get the true image, is to look through the eyepiece with your back towards what you are looking at.

[Moonshane]

assuming you are talking about a Newtonian reflector then just turn your star map upside down and the view will be per the eyepiece.

[ultramol]

I to suffer from the same problem. My brain I am afraid will just not hack it. In the end I made my system in to a goto and have never looked back. Having said that I still look at sky maps all the time (usually because it allways rains here ) and learn were everything is supposed to be. 

[brantuk]

If this is for finding stuff and your brain refuses to work it out and coordinate your hand movements (like me) - then just use a raci or Telrad to get the same view as the star atlas. Once found you can then view  the object in the telescope and it no longer matters which way round it is - there's no "correct orientation" in vacuumless space.

If however it's for framing and orientating an image on a camera chip according to personal preferences - then you either have to work it all out to get what you want, or take your picture as it appears in the scope, then manipulate the resulting image orientation using software to rotate and flip. Or maybe I'm being a bit too simplistic? lol

[ollypenrice]

assuming you are talking about a Newtonian reflector then just turn your star map upside down and the view will be per the eyepiece.

That seems the easiest way to put it. However, I think most people's star hopping is not in the eyepiece of the main scope but in the finder. FInders can have a 'correct' image or be upside down. If you use a correct image finder the view will not be the same way up as the EP but, as Brantuk says, does this matter? Find it in the finder and look at it in the main scope.

Olly

[Stu]

I was confused enough before Kim started talking about vacuumless space! Do they not have hoovers (or Dysons for the younger members) up there, or am I missing something

[triton1]

The vacuum cleaner Galaxy m109?

[ollypenrice]

Come now, gentlemen, there is no vacuum in space. The quantum minimum energy density sees to that! Even the void inside my head spontaneously creates the odd particle, even if they do annihilate each other almost instanteously... (For this piece of good news I'm grateful to John Barrow and his Book of Nothing.)

Anyway where were we? Back to front? Upside down? Inside out? Blowed if I can remember.

lly

[triton1]

What happened to left to right,sorry could,nt resist

[glowjet]

If it is creating too much of a headache, then consider changing to a decent sized Refractor, there is only the left to right to bother about then