Cone error

[Guest Si2504]

I wasn't quite sure where to put this, so i hope its in the right section.

 

Am i right in thinking that cone error effects the accuracy of goto alignment and is this all that CE has an effect on even if polar alignment was 100% perfect? I know PA would never be 100% but lets say for arguments sake it is.

 

I have also seen statements that suggest doing a 3 star alignment takes into consideration any cone error there may be and allows for this. How true or false is this? Thanks.

[Doc]

Cone error occurs when the telescope tube is not parallel to the RA axis of the mount. I have never personally adjusted for cone error as I'm not into imaging but if you look at a dovetail bar you normally find two small adjusting screws. 

 

As far as I'm aware a three star alignment takes care of cone error but if I'm wrong I'm sure someone will point it out.

 

 

 

[Brantuk]

I don't think it's important for observing or alignment - more to do with imaging. Now I'm not a real imager - more of a wannabe or "image gear collector" lol - but here's a good explanation of it and how to correct. Hope it helps

 

http://www.cloudynights.com/page/articles/cat/articles/a-simple-cone-error-correction-procedure-r2447

 

[+Bino-viewer]

I like that Kim : a wannabe imager and / or an image gear collector. Thats what i am too !  

[Guest Si2504]

Ok thanks, ill have a read through it