NQLD_Newby
12-07-2007, 02:32 PM
Hey guys/gals
I recently (approximately a month ago) received a tasco galaxsee 4.5 f/5 as a pressie. I see PeteMo has done a review on this exact scope and I have experienced similar concerns as pete about the ep quality. Being new at this and still very much in the learning stage, I have a question about which eye piece I should go out and buy.
I know and understand the calculations regarding maximum usable magnification etc. Given that my interest is mainly star clusters nebula etc, I am presuming (given everything that I have read so far) that I need reasonably low magnification with wide AFOV EP's. Given that this scope has a FL of only 500mm the eye piece I use will be considerably lower number compared to some of the longer focal length scopes to achieve the same magnification. I have found the 10mm EP supplied with the scope to be perfect for Omega Centarus. Although it looks like a cloud ball rather than seperate stars, size wise and filling the FOV this EP is the right size.
This brings me to my question. given my explanation above would a 10mm eye piece be well suited for looking at most DSO's (well those that are bright enough anyway) or would another size be more suited. The other problem is, in Townsville there is absolutely no telescope shops to get advice or even try out EP's etc. everything has to be mail ordered.
Oh another question, I have been reading a lot about collimation. Do I need a collimation tool and if so, how often should I do it.
thanks people, hope some of you can shed some light on the subject for me.
I recently (approximately a month ago) received a tasco galaxsee 4.5 f/5 as a pressie. I see PeteMo has done a review on this exact scope and I have experienced similar concerns as pete about the ep quality. Being new at this and still very much in the learning stage, I have a question about which eye piece I should go out and buy.
I know and understand the calculations regarding maximum usable magnification etc. Given that my interest is mainly star clusters nebula etc, I am presuming (given everything that I have read so far) that I need reasonably low magnification with wide AFOV EP's. Given that this scope has a FL of only 500mm the eye piece I use will be considerably lower number compared to some of the longer focal length scopes to achieve the same magnification. I have found the 10mm EP supplied with the scope to be perfect for Omega Centarus. Although it looks like a cloud ball rather than seperate stars, size wise and filling the FOV this EP is the right size.
This brings me to my question. given my explanation above would a 10mm eye piece be well suited for looking at most DSO's (well those that are bright enough anyway) or would another size be more suited. The other problem is, in Townsville there is absolutely no telescope shops to get advice or even try out EP's etc. everything has to be mail ordered.
Oh another question, I have been reading a lot about collimation. Do I need a collimation tool and if so, how often should I do it.
thanks people, hope some of you can shed some light on the subject for me.