Comment by ano-ther

12 hours ago

I have seen a local theater advertising 70mm dual projection (but not mentioning IMAX) and another one IMAX. Will there be a difference?

No idea what "dual 70mm" is, but it's not IMAX. IMAX is a very specific and unique end to end capture and presentation format. It's quite an experience but I wouldn't worry about it too much. If you can see a 70mm presentation it will be stunning regardless.