8mm Forum: Variable speed vs. fixed speed

»	8mm Forum » 8mm Forum » Variable speed vs. fixed speed

UBBFriend: Email this page to someone!

Author

Topic: Variable speed vs. fixed speed

David Pannell
Phenomenal Film Handler

Posts: 1072
From: Horsham, West Sussex, UK
Registered: Nov 2004

posted April 29, 2007 02:04 AM

I was wondering which type of speed control various members prefer. Some projectors have a variable rheostat so that the speed can be adjusted between zero and full speed, whilst others, of course, have just the two fixed speeds for silent and sound films. This goes equally for 8mm and 16mm machines.

The 'pro' for variable speed would be for elimination of flicker when transfering to video etc. or for compensating for home movies which may not have been shot at correct speed. The 'con' would be not being absolutely sure of accurate speed setting, and possible shortening of lamp life if run at too slow a speed.

Obviously vice versa for the two fixed speeds scenario.

Any thoughts, anyone?

--------------------
Dave.

Valves and celluloid - a great combination!
Early technology rules OK!

| IP: Logged

Lars Pettersson
Master Film Handler

Posts: 282
From: Stockholm, Sweden
Registered: Jan 2007

posted May 05, 2007 11:47 AM

Hello David!

I find the possibility to fine-tune the projector speed a great asset, for instance, you do seem to gain a little bit of brightness if a 24 fps film is shown at slightly higher speed, also if there are minor sync problems (sound being a frame early or late in places)in a feature with rerecorded sound, this will be a little less noticeable at 24,5 or 25 fps.
On the other hand, 18 fps or even less is great if the footage is to be scrutinized -lighting tests for instance.
So by all means variable speed, ideally with fixed positions for 18 and 24 fps.

Cheers,
Lars

| IP: Logged

All times are Central

Printer-friendly view of this topic

UBB.classic^TM 6.3.1.2