Jump to content


Photo

Photography Camera Flashes On Film


  • Please log in to reply
4 replies to this topic

#1 Michael Sarrow

Michael Sarrow

    New

  • Basic Members
  • Pip
  • 3 posts
  • Student

Posted 07 January 2007 - 01:18 AM

I have a question regarding photography flashes on film.

First, suppose there is a motivated light source of the flash of a still camera off frame. This is supposed to illuminate the two characters in the frame and some of the set. Essentially, someone is off frame with a disposable camera in a dim room and flashing a picture of the two characters that the film camera is framing. What is the best way to achieve this effect?

Do I use a flashbulb or other photography light (and possibly umbrella?) to simulate the flash? Will this be overbearing for the effect of a disposable camera? Is it easier to do it in post? Obviously, overexposure for a few frames wouldn't create the same shadows as a motivated source, but would anyone notice? What are my other options?

Also, if I use a real flashing device made for photography, do I need to adjust shutter speed to register the flash? I remember reading that camera flashes will not always register on film due to speed. I also have the same question of a still camera with flash facing the film camera. Will the flash always register?

Thanks for any help. I really appreciate it!
  • 0

#2 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 19759 posts
  • Cinematographer
  • Los Angeles

Posted 07 January 2007 - 02:10 AM

Electronic camera flashes can be too fast for a movie camera shutter, so often they use off-camera an old cube-type flashbulb and something to trigger it. Or you can use a strobe synced to the camera.

Worst case would be to turn on and off a bright light and later cut out a few frames (or speed it up) to keep it as short as possible.
  • 0

#3 Michael Sarrow

Michael Sarrow

    New

  • Basic Members
  • Pip
  • 3 posts
  • Student

Posted 07 January 2007 - 03:12 AM

Electronic camera flashes can be too fast for a movie camera shutter, so often they use off-camera an old cube-type flashbulb and something to trigger it. Or you can use a strobe synced to the camera.

Worst case would be to turn on and off a bright light and later cut out a few frames (or speed it up) to keep it as short as possible.



Thanks so much for your help. I really appreciate it.

Do you know where I can order (preferably overnight, so I can begin testing immediately) the flashbulbs? Also, what do I need to trigger the bulbs, and where can I order one? or are they expensive enough to need to rent?
  • 0

#4 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 19759 posts
  • Cinematographer
  • Los Angeles

Posted 07 January 2007 - 12:05 PM

Usually the flash bulb trigger is supplied by the prop man on my shoots, and many of them own one or rent one. A few efx people build a simple device that holds three or four cubes for a bigger flash. I don't know the mechanism for triggering the flashcube, but it must be pretty simple.

A junk store or old camera shop probably has an old flashbulb holder/trigger unit.

The flashcubes are pretty expensive these days.

You can read a discussion here:
http://www.photo.net...g?msg_id=00HgWG
http://www.graflex.o...lash/nancy.html
http://www.ozcamera....lash-bulbs.html

Here is a website that sells all times of flashbulbs:
http://www.flashbulb.../bulb_price.htm

Here is an example of the multi-flash holder I've seen on film shoots (you see that they have a lot of feature film credits):
http://www.flashbulbs.com/Effects.html

Flashguns:
http://www.flashbulbs.com/flashgun.htm

Is "IS" really your last name? If not, please update/correct your User Name.
  • 0

#5 Michael Sarrow

Michael Sarrow

    New

  • Basic Members
  • Pip
  • 3 posts
  • Student

Posted 08 January 2007 - 07:58 PM

Usually the flash bulb trigger is supplied by the prop man on my shoots, and many of them own one or rent one. A few efx people build a simple device that holds three or four cubes for a bigger flash. I don't know the mechanism for triggering the flashcube, but it must be pretty simple.

A junk store or old camera shop probably has an old flashbulb holder/trigger unit.

The flashcubes are pretty expensive these days.

You can read a discussion here:
http://www.photo.net...g?msg_id=00HgWG
http://www.graflex.o...lash/nancy.html
http://www.ozcamera....lash-bulbs.html

Here is a website that sells all times of flashbulbs:
http://www.flashbulb.../bulb_price.htm

Here is an example of the multi-flash holder I've seen on film shoots (you see that they have a lot of feature film credits):
http://www.flashbulbs.com/Effects.html

Flashguns:
http://www.flashbulbs.com/flashgun.htm

Is "IS" really your last name? If not, please update/correct your User Name.


Thanks for the info, and sorry about the user name.

I have picked up a Brownie Hawkeye camera with flash, and emailed flashbulbs about the correct bulbs. Hopefully this works. Thanks again for the help.
  • 0


Rig Wheels Passport

Wooden Camera

Tai Audio

The Slider

CineLab

Abel Cine

rebotnix Technologies

Metropolis Post

Technodolly

Aerial Filmworks

Willys Widgets

Media Blackout - Custom Cables and AKS

CineTape

Glidecam

Visual Products

Broadcast Solutions Inc

FJS International, LLC

Gamma Ray Digital Inc

Paralinx LLC

Ritter Battery

Opal

Willys Widgets

CineLab

Metropolis Post

Visual Products

The Slider

Aerial Filmworks

Opal

Media Blackout - Custom Cables and AKS

FJS International, LLC

Wooden Camera

rebotnix Technologies

Technodolly

Ritter Battery

Tai Audio

Broadcast Solutions Inc

Gamma Ray Digital Inc

Rig Wheels Passport

Abel Cine

Paralinx LLC

Glidecam

CineTape