Jump to content


Photo

K-3. Any ASA?


  • Please log in to reply
4 replies to this topic

#1 Joshua Jackson

Joshua Jackson
  • Basic Members
  • PipPip
  • 68 posts
  • Director
  • Seattle, WA

Posted 17 July 2007 - 09:00 PM

I understand that there is a meter on the K-3 that goes up to 250, or something of the like. That's just for the light meter, correct? If you have a handheld meter, then the meter that adjusts the film speed doesn't mean anything, right?
Thanks!
  • 0

#2 Sir Alvin Ekarma

Sir Alvin Ekarma
  • Basic Members
  • PipPipPip
  • 209 posts
  • Director

Posted 17 July 2007 - 11:43 PM

As long as you don't have a battery in the K-3 for the meter, it won't do anything...
  • 0

#3 Olex Kalynychenko

Olex Kalynychenko
  • Basic Members
  • PipPipPipPip
  • 868 posts
  • Cinematographer
  • Dnepropetrovsk, Ukraine

Posted 18 July 2007 - 03:37 AM

I understand that there is a meter on the K-3 that goes up to 250, or something of the like. That's just for the light meter, correct? If you have a handheld meter, then the meter that adjusts the film speed doesn't mean anything, right?
Thanks!


Krasnogorsk 1, 2, 3 cameras have TTL light meter.
The scale of TTL light meter have scale of speed of shooting ( outside circle ), scale of speed of film at GOST ( inside circle ) and switch "on-off" inside.

[attachment=2397:K_3_ligh...switch_1.jpg]

A some versions of K-3 cameras, ( export version ) had scale of speed of film at ASA.
Yes, The original scale of speed of film at GOST ( russian standard of speed of film ) have digitals :
8, 11, 16, 22, 32, 45, 65, 90, 130, 250 GOST.
If you have film with speed at ASA you can use table :

25 ASA = 22 GOST
50 ASA = 45 GOST
100 ASA = 90 GOST
200 ASA = 180 GOST

The handle of light meter not influence on speed of shooting of camera, because, the speed of shooting of camera set by other handle.

We can see of eletrical circuit of light meter of Krasnogorsk cameras

[attachment=2398:K_3_ligh...system_1.jpg]

This is simply circuit included light sensor - photoresistor, on-off switch, additional resistor, indicator, battery.
This is light meter system have not high sensitivity, big inertia and have peculiarity " the blindness".

What i mean " the blindness". If you open of aperture at F=1.9 , the big volume of light will go to sensor.
The sensor will have low resistance and circuit will have a high current.
You will change of aperture from F1.9 to 5.6...8..11, But, the sensor will on " the blindness" and you will need wait 20..30 second up to sensor begin of measuring of level of light correctly.
That's why, i recommend adjust of aperture from full closed (F 16) aperture up to correct position of indicator.

This is system of light meter have not high precision +/- 0.5...1 stops.
That's why, the modern, digital outside light meter give you better result of measuing.

The some sensors can lost sensitivity too much and you need test and adjust of light meter or modify of circuit for two batteries and re-adjust of additional resistor and mechanical control of light meter.

You can use of 1.5 v battery ( batteries ) type 625 with metal disk adapter.
  • 0

#4 Mark Dunn

Mark Dunn
  • Basic Members
  • PipPipPipPip
  • 2424 posts
  • Other
  • London

Posted 18 July 2007 - 09:44 AM

The meter isn't coupled to the aperture or framing rate dial. So you can just ignore it.
  • 0

#5 ryan_bennett

ryan_bennett
  • Basic Members
  • PipPipPip
  • 138 posts
  • Student

Posted 18 July 2007 - 11:33 AM

If you have an incident/spot meter and have no battery in the camera and operating totally manual, you can put whatever you want in it and set the exposure yourself.
  • 0


Broadcast Solutions Inc

Willys Widgets

FJS International, LLC

Ritter Battery

Metropolis Post

Rig Wheels Passport

Wooden Camera

Aerial Filmworks

CineLab

Opal

rebotnix Technologies

Tai Audio

Paralinx LLC

Abel Cine

Visual Products

Media Blackout - Custom Cables and AKS

Gamma Ray Digital Inc

Glidecam

Technodolly

CineTape

The Slider

Metropolis Post

Tai Audio

Willys Widgets

Technodolly

Aerial Filmworks

Abel Cine

Glidecam

CineLab

rebotnix Technologies

Media Blackout - Custom Cables and AKS

Rig Wheels Passport

Paralinx LLC

Broadcast Solutions Inc

The Slider

Visual Products

Wooden Camera

Gamma Ray Digital Inc

CineTape

Opal

FJS International, LLC

Ritter Battery