Hand tracking long exposures

[sorrimen]

Hi everyone 

Right so I’m making an assumption here that a lot of us imaging with phones will have untracked scopes such as dobs. For those of you who fit my assumption, have you ever tried hand tracking or tilting your phone for exposures longer than 10 seconds? I’ve just about managed to tilt for a 10 second one but took a few tries to get it perfect and couldn’t imagine 30 seconds would be possible. Let me know your experiences!

[Dave scutt]

I've only managed single shots if I move my phone I lose focus, if I take 5 to 10 seconds I get star trails

[Alien 13]

With the phone attached to the eyepiece the tracking requirements are similar to a full blown imaging rig, you can do the reverse fairly easily by having  the phone taking wide field and use the Dob in effect as a guide scope to keep a star centered in the FOV.

Alan