|
At ISO 100 you should be able to expose for 15 minutes maybe more...no doubt the star trails will be long but some patterns should appear.
Do three runs.First with weights where you balancing tells you is ideal then move them up say an inch or two take another 15 minutes and then down an inch or two...check your clutch is engaging properly ..I was caught once where I thought it was tight but it was running into the mount and was not tight at all...also if you decide to post your photos mark direction and start..ie start exposure with say one minute, shut off, wait two minutes then start 15 minute exposure..this way you get a dot showing where the trail started...also listen to the motors and note if you hear any clicks..that will be jumping gears..could be worm gear not meshing..if you hear regular clicking switch off and pull it down and inspect worm gear.
However...you could try to do the 15 minute run and find at the end have a perfectly round star..could happen.
Last night I switched on and selected ( as I thought tracking) then trails..mmm yes lights on..what the ??? ..I had not pressed sidereal rate so the mount never was tracking...and power..check that you have good power as that just possibly could be your problem.
Good luck and let us know the outcome.
Alex
|