T-Max 3200 or other?

I've followed a variable star for some months now. The problem is that I have never been able to see it! So I want to try a film shot through my Dobsonian on Equatorial Platform. What is the fastest film available - say for a 30 seconds exposure time?

Roger

Hi Roger,

Is the variable star a rapidly varying one? Since you have a eq platform, 30 sec of exposure seems a little short. Longer exposure may give you more than a higher speed film do.

T-Max 3200 is certainly a good starting point. However, you may want to try T-Max 400 as well. Although T-Max 400 has lower ISO speed, its much finer grain may help to detect faint stars, which are very small on the film.

Wei-ao