… I know getting the film look is shooting in 24 fps ...
sorry to say that, but that is (silly) wrong.
You get a film-look with 25 or 30fps too ... ok, Mr.Jackson failed to create a film-look with 48fps - but that is another story...
the low frame-rate allows to create 'natural motion blurr', which is the main ingredience of 'film look'; watch any Hollywood blockbuster - any frame shows blurred areas.
Because 24fps allows - based upon the 180° rule - a low shutter speed of 1/48th sec.
You know from photography: slow shutter speed = blurred.
So, set your cam to 25fps AND speed to 1/50th - probably you have to use a small aperture number, which leeds to the next problem:
(actual) Film-Look shows shallow Depth-of-Field - which asks, you learned as a photographer, for a wide open aperture...
so, how to accomplish that?
I have a cheap one, which is modifiable - just turn it, and its from 50-400 (or something) - very handy
After perfect lighting, using correct settings, you add:
grading (such as popular teal'n orange), add artificial grain, apply tons of light-leaks/lens flares (greetings to Mr Abrams ) = film look.
but not '24fps' vs. 25fps ... that's nonsense.-
Shoot at 25, edit at 25. It will be fine. Tho Karsten mixed in the 180 degree rule (which has nothing to do with frame rate/shutter speed) she wound up at the correct end. 24 fps vs. 25 will produce imperceptible differences.
There is so much more involved with creating film/video art than a shallow depth of field/blurred movememet.
... On my DSLR, Canon Rebel 1100D the shutter speed is automatic and you cannot set it.
I just took a look in its Manual - right, just 'all auto' avialable..
What you can do, although, 'force' the device to slow shutter speed, by using ND-filters ... but keep an eye on your display: if the cam starts to use higher gain aka 'ISO beyond 800-1000', you get too much noise...
and, no, do NOT convert to 24! that's 'uneven math' and could cause stutter/hickups in your moving pictures ...
the 180° degree rule determines shutter speed in conjuncton with framerate ... so, what's wrong with my statement? digital cams have no rotary disc shutter, yepp, but the rule gives still some orientation ... (?)