Cave explorer

Photographing in the caves must be completely dry by hand. Tripod became obligatory to always be there, could also use a table or stool hard, but it's certainly difficult to enter the cave take the table. Using the manual mode is standard, but with knowledge of the standard specification manual cameras used logic can be run again. Tool of the additional lighting besides the flash and boom is needed. Then the tape measure or rope with the right size (5 feet, 3 meters and 1 meter).
Once we find an object, determine exactly where the camera position will be to take the image composition. Attach a sturdy tripod and make sure it is. Do not shake or unbalanced.

Use a cable release and turn on the lights help to illuminate the object entirely. Do a focusing fine as soon as possible.Replace the diaphragm in item 11, or plug in night shoot / program when the camera automatically. Measure the distance meter farthest background with a camera and get the exact numbers.

Take for example the distance of 10 meters. Before the shooting we have to know all the GN (Guide Number) of all the flash brought. Looking to the clay from typenya name. Example: SB26 means GN 26 at ASA 100, or see the table are usually listed on the Flash, set at ASA 100 and see the recommended range when using the diaphragm 11. Well, for instance the table shows the number 3 meters. So it means the flash GN is 3 X 11 feet = 33 (GN Flash is 33). So, if the background furthest distance was 10 meters then the GN 33: 10 = 3.3 meter results. It means: to illuminate the object before the camera must be set in the diaphragm 2.8 or 3.5 (closest to 3.3). While the count of GN was made under the speed of 1 / 60 (this is always calculated so).

In fact, the cameras had been installed in the bulb and the condition of the diaphragm 11. So if want to use the diaphragm 11 we must multiply the length of time as much as point increase in the diaphragm.

Usually this is called up some stop (STOP). If the results of this calculation was 3.5 means to get to 11 have risen by 5 stops. (From 3.5 -> to 4 -> to 5.6 -> to 8 -> to 11). Once we know must stop then speed up 5 must also be converted to 5 times longer than 1 / 60. So this count,: 1 / 60 -> 1 / 30 -> 1 / 15 -> 1 / 8 -> 1 / 4 -> 1 / 2 sec. So ideally to produce images must use a minimum speed of 1 / 2 sec. Do not forget, the calculated distance is the distance from the place of flash (light source) is leading to the object and the distance the reflection of light into the camera lens.

So if using flash must keep some fruit also calculated the distance of each flash. Later to be known is the nature of light flash on the image object in the photo later. Ray flash, bright with sunlight temperatures (around 6000 degrees kelvin kira2). While the additional light from a flashlight boom or lighting equipment, etc. ranging from 2000 to 3500 degrees Kelvin only. So speed cameras must be augmented due to other light sources obviously need more time to fall and burn / recorded as data by the camera.

So if light was added in addition to the flash must be augmented his time, means must be much longer. And lastly, never forget safety procedures. Use a safety who can maintain our position of stable and do not ever - times emotional. Ethics in search cave also remains should always be considered.
May be useful. Greetings adventurers!

Source: http://www.fotografer.net