My M 83 - Southern Pinwheel and help with guiding

[noideasteve]

So below is my image of the Southern Pinwheel galaxy. It was taken with a Nikon D610, 15 x 120's exposures at ISO 1600, on a Celestron Edge HD 8" with no reducer. My question to everyone here is as you can see in the image the stars are starting to trail. When I tried a 300 second exposure the trailing was rather bad so the longest I could get that gave a respectable image were 120 second exposures. I believe my polar alignment could have been a lot better thanks to a very enthusiastic friend of my dads wanting to look at everything he could and yes even bumped the mount Yes I had bumped mount rage but kept it all in. So rather do everything again I proceeded with my imaging session once he went away.
So after my little story my question is.... guide scopes. Because I'm photographing at such a long focal length and running a william optics 50mm guide scope, should I be running a longer focal length guide scope with my edge hd 8"? Will that prevent my star trails a little bit?
I haven't had the chance to try because of weather, but I have a william optics star 71mm should I use that as a guide scope if i'm going to use my edge hd for some sessions? I just received a tandem bar today so I'm hoping to mount them both on my mount and yes my mount can comfortably carry it all including the weight of the bar  

So would my setup be something like this with my mount loaded (not to max load cap).....
Photographing with - Celestron Edge HD 8" - Guide with - WO Star 71
Photographing with - WO star 71 - Guide with - WO 50mm


I'm awaiting delivery of two mono Atik cameras to add to my collection the 414EX mono and the 383L+, So can't wait to join the Mono CCD group too

Thank You.

[Marky1973]

I dunno about you question - I hear that an Off-Axis Guider might be the way to go with a longer focal length, but I'll wait for more knowledgeable people to come in an answer! Nice photo though!

[noideasteve]

Thank You and an Off-Axis guider completely slipped my mind, I might look into it but before purchasing one I will try my WO star 71 first I think and see if there is any difference in tracking.

[StargeezerTim]

That is a lovely galaxy and a lovely photo... 

[Sonicfishcake42]

Great pic, do you mind me asking what mount you use?

 

[noideasteve]

That is a lovely galaxy and a lovely photo... 

Thank You very much, I didn't get as many exposures on this as I wanted, so the next time I try... fingers crossed I will get a better outcome.

Great pic, do you mind me asking what mount you use?

Thank You!

For this image I was using the Celestron Advanced VX mount with the Edge HD and the William Optics 50mm guide scope. I've just purchased a Celestron CGEM mount.