Jump to content


Photo

Testing film, profiling cameras/lenses


  • Please log in to reply
4 replies to this topic

#1 Curtis Alexander

Curtis Alexander
  • Basic Members
  • PipPip
  • 13 posts
  • Director

Posted 23 January 2011 - 12:40 PM

So I recently bought a Krasnogorsk-3 and I have a whole whack of kodak 3374 (is a high contrast b&w film meant for sound use) and I don't know how to test it. I'd really like to try to get good at shooting this film (perhaps it's not such a good idea given what the film is meant for, but I would imagine testing film is a good skill to have anyways). I picked up a Sekonic l-758CINE and would like to try to profile the k3 if I can. I've seen a couple examples of doing so for DSLRs (which is perhaps what the l-758 profiling is meant for) but I'm wondering if the same concept can be applied to film?

My workflow would probably be to have it scanned digitally, so I would assume that would be part of the process as well, but I don't know how I'd set the film up to be tested/profiled and also take into account the digital scan.

Any pointers on where I should start reading as to how to approach this?

Thanks,
Curtis.
  • 0

#2 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 20068 posts
  • Cinematographer
  • Los Angeles

Posted 23 January 2011 - 12:46 PM

Under and overexposure tests and lighting contrast ratio tests are good places to start, then also color-contrast filter tests outdoors.

I'd shot a face and a grey scale chart for the over and under tests to determine your workable range.

You may also want to test push and pull-processing as well and how that affects contrast and graininess, if you plan on any push or pull-processing.
  • 0

#3 Curtis Alexander

Curtis Alexander
  • Basic Members
  • PipPip
  • 13 posts
  • Director

Posted 23 January 2011 - 04:07 PM

Under and overexposure tests and lighting contrast ratio tests are good places to start, then also color-contrast filter tests outdoors.

I'd shot a face and a grey scale chart for the over and under tests to determine your workable range.

You may also want to test push and pull-processing as well and how that affects contrast and graininess, if you plan on any push or pull-processing.


Where does one buy inexpensive charts? And then once you've shot a chart, how do you go about interpreting the results?

(ps. I think it's amazing you post on forums, David Mullen ASC, and help people out!)
  • 0

#4 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 20068 posts
  • Cinematographer
  • Los Angeles

Posted 23 January 2011 - 04:24 PM

Sometimes the lab doing the processing has grey scale charts that they give away to customers -- I have a FotoKem one.

Over the years, Kodak and Fuji have also given me grey scale charts, so talk to your sales rep for the film stock.

Worst-case scenario, go to a photo store and buy an 18% grey card, put it on a board with a white card on one side and a black velvet square on the other. That's mainly what you need to see: black, 18% middle grey, white, and fleshtone. Since you are planning on using a spot meter, it's really the 18% grey card that is going to be useful in terms of under and overexposing and seeing when it goes black or burns out to white.
  • 0

#5 Curtis Alexander

Curtis Alexander
  • Basic Members
  • PipPip
  • 13 posts
  • Director

Posted 26 January 2011 - 12:29 AM

OK, thanks. I bought a couple inexpensive grey cards and when they get here I'll start muddling through the process, hopefully learning as I go. Sure like my K3 camera though...really are built like a Russian tank, and with a nice M42 mount as well. Much to learn.
  • 0


Willys Widgets

Media Blackout - Custom Cables and AKS

Technodolly

Visual Products

New Pro Video - New and Used Equipment

The Slider

Ritter Battery

Broadcast Solutions Inc

Metropolis Post

Gamma Ray Digital Inc

Wooden Camera

Paralinx LLC

rebotnix Technologies

Glidecam

FJS International, LLC

CineLab

CineTape

Abel Cine

Tai Audio

Rig Wheels Passport

Aerial Filmworks

Gamma Ray Digital Inc

Metropolis Post

Tai Audio

Glidecam

New Pro Video - New and Used Equipment

Ritter Battery

Aerial Filmworks

Paralinx LLC

Wooden Camera

rebotnix Technologies

CineLab

Abel Cine

Technodolly

CineTape

The Slider

Media Blackout - Custom Cables and AKS

Willys Widgets

Rig Wheels Passport

Visual Products

Broadcast Solutions Inc

FJS International, LLC