Highspeed Flash


Using high speed stroboscope volume



Although a somehow uncanny thing will be imagined if only a high-speed glint-of-light stroboscope and a character are seen, it is close to except in fact. Although assertion is impossible since not all were tried, it could be said that almost all the things of a small stroboscope are so. Although not measured, as it is, the stroboscope of the film camera with a lens is also regarded as glint-of-light time being short. It will be expressed as auto, and if the catalog of a small stroboscope is seen, 1 / 1200 - 20000 etc. seconds, and glint-of-light time will be expressed as the manual for 1 / [ 1/1200 - ] 30000 seconds. It is shown that this becomes the glint-of-light time for 1 / 20000 seconds (manual) in 1 / 1200 seconds at the time of the minimum power at the time of the maximum power. In the case of a small stroboscope, power is adjusted by the time cut of the current passed in a luminescence pipe. Then, what is necessary is just to use it in the place near the minimum power, if you want to carry out high-speed photography. However, since power stabilized each time will not be obtained if it is the stroboscope to which power adjustment of a manual does not stick only with auto, let's choose the model which can perform manual power adjustment. (Even if it makes generators other than for [, such as a large-sized stroboscope, for example, BALKER, BURON COLOR, and FOTONA, ] high-speed photography into the minimum power, they are not fit for photography of this hand)

The stroboscope of SUMPACK currently used for explanation is what was found by chance in the used store, and can be fundamentally used similarly, if it is the thing to which power regulation sticks with the manual by every maker's stroboscope
It can be come to hand by power adjustment for about $35 in possible medieval times from SUMPACK B3000S guide number 30FULL luminescence used for photography of FLASH EYES to 1/32.


The state ISO 100 of maximum power GN30 The state ISO 100 of minimum power GN7.5


By the model, since the relation between glint-of-light time and power is various, please test by your stroboscope.



How to opt for exposure


If manual luminescence is carried out, you have to opt for an iris diaphragm personally. Since the latitude is narrow especially in the case of a reversal film, you have to make it an exact iris diaphragm value. The method of extracting without using meter, although it is easy, if there is flash meter, and deciding a value is introduced

First, the stroboscope which he has should carry out a guide number check, and let's decide by what power it uses. A guide number is the numerical value which shows the thing of the value of the iris diaphragm at the time of making light emit in 1m distance with the film of ISO100. For example, suppose that one eighth of power use the film of ISO100 by SUMPACK B3000S. Since the guide number at the time of FULL luminescence is dropped on the 1/8 which is 32 (it calculates by GN32 in order to make it intelligible although it is GN30 in fact), a guide number is set to 11. That is, when taking a picture of the photographic subject in 1m distance, what is necessary will be just to set an iris diaphragm to F11. However, since power from which photography distance is set to dozens of cm is fluctuated in proportion to distance in the case of lady brld, a milk crown, etc., it is set to F22 by 50cm, and is set to F45 by 25cm. (Since there is also a thing which cannot be set up in this way by the model, please follow it as a general guide)

First, the stroboscope which he has should carry out a guide number check, and let's decide by what power it uses. A guide number is the numerical value which shows the thing of the value of the iris diaphragm at the time of making light emit in 1m distance with the film of ISO100. For example, suppose that one eighth of power use the film of ISO100 by SUMPACK B3000S. Since the guide number at the time of FULL luminescence is dropped on the 1/8 which is 32 (it calculates by GN32 in order to make it intelligible although it is GN30 in fact), a guide number is set to 11. That is, when taking a picture of the photographic subject in 1m distance, what is necessary will be just to set an iris diaphragm to F11. However, since power from which photography distance is set to dozens of cm is fluctuated in proportion to distance in the case of lady brld, a milk crown, etc., it is set to F22 by 50cm, and is set to F45 by 25cm. (Since there is also a thing which cannot be set up in this way by the model, please follow it as a general guide)


Actual photography



In the case of a milk crown

What is prepared
  1. Milk (it OK with ordinary milk)
  2. Syringe (what has good quality for an experiment).
  3. The stand which fixes a syringe
  4. The board used as a floor (black acrylics is used with a left photograph)
  5. Lens cleaner (milk bounds)

Photography preparation

  1. The board of a floor is chosen. A thing without a water absorptivity is recommendation with the hard quality of the material (if it does not clean up whenever it drops one drop, since it will be hard to become a beautiful form). When many things are changed, the way of the ability to do which may put milk into a glass etc. may also be different and interesting
  2. A syringe is firmly fixed to a stand (if there is slack, a falling point will not be specified but it will be hard to take a photograph).
  3. The distance from a syringe to a floor is adjusted (since a difference appears in a form in the size and fall distance of waterdrop, please test).
  4. A stroboscope is set (it was about 30cm at this time.). Keep in mind that a stroboscope is weak for moisture.
  5. Only one drop is dropped, a position check is carried out, and a camera is set.

Photography procedure

  1. Since it becomes valve photography, the room should become dark. Please narrow down and take a photograph, and if a motion of waterdrop cannot be seen, since it will be troubled, leave some light.
  2. since time lag occurs in a circuit -- timing -- difficult -- becoming -- please let me emit light Although it thinks that it is difficult at first, a rhythm can be held if it is doing repeatedly. Also with the naked eye at this time, a milk crown can be seen by luminescence of a stroboscope. If there is an infrared sensor switch, a photograph can be taken more easily.
  3. if one drop is dropped, please be sure to wipe off finely -- when it drops on the milk which has accumulated like a glass, after the surface becomes quiet, please drop the following waterdrop Otherwise, unnecessary power will be applied to waterdrop and it will become the milk crown of a distorted form.
  4. It is photography still more. If it checks having set all, the room will be made dark and a shutter will be made left open by the valve, and it is a repetition of 2 and the work of three. At this time, let's be careful to become one drop of waterdrop of the film of one sheet. Moreover, since focus adjustment cannot be carried out in the state of the done milk crown, an iris diaphragm is extracted as much as possible, and a focus is earned with depth.

Cautions

  1. Since most is manual photography, please carry out sufficient test and prepare data.
  2. The waterdrop of milk bounds on a lens etc.! Keep in mind that it will become a spot if it digs.
  3. Keep in mind if a stroboscope is wet, are dangerous
  4. It does not become the waterdrop of the size stabilized when the quality of a syringe was not good.
  5. If a shutter is opened, please do work quickly and close a shutter. It becomes the cause of sensitization
  6. When a photograph is taken by this method using a digital camera, a noise may come out in relation with exposure time.


@@@@In the case of Lady bird

What is prepared
  1. Lady bird large number (since it learns, and flying becomes impossible and it can escape)
  2. A suitable stick (if it does not slide except a wooden stick, I try to want to be OK)

Photography preparation

  1. A stick is stood firmly. Since Lady bird is repeatedly put on a stick, it fixes firmly so that it may not move.
  2. A stroboscope is set in the way of a milk crown
  3. A camera is set with some influence for a while so that Lady bird may fly in any direction.


Photography procedure

  1. If Lady bird is put on the stick, a general individual will jump out.
  2. Timing is seen and a shutter is only pushed


Cautions

  1. Although it is the photography using the character of Lady bird, the individual which does not fly is also. If the same individual is also repeated, it may learn and stop flying.
  2. Let's observe Lady bird well before photography. Photography is not so difficult if an insect understands even an action pattern with a peculiar action pattern (there is an individual difference, of course) according to a kind.
  3. Lady bird [ finishing / photography ] is returned to the original environment.



mail


STEREO BASE HOME