Camera settings

[Danny]

What exactly is ISO and apature? What do they do?

Danny

[jrDaquaman]

ISO is the speed of the shutter being open and the aperature is the amount of light that comes throught the shutter. :) . i hope that is clear enought

[blackwater]

I believe that ISO is what we commonly term as "film speed". In fact the correct term to use should actually be "film sensitivity". But since the film sensitivity will affect the amount of light required to make a good photo, it indirectly affects the "speed" of the camera's shutters. The longer the shutter stays open, the more light goes into the camera.

As for aperture, it refers to the size of the hole the shutter opens. Smaller apperture means larger hole. Larger hole means it allows more light to enter and so it requires to shutter to open for a shorter time.

Attached is the image to CDM's diagram on aperture:

http://arofanatics.com/members/cdm/aperture/image01.jpg

[CDM]

blackwater is right. Higher ISO no. (400) means higher film sensitivity, also shorter required exposuring time for a same light conditioin. And, smaller aperture no. (F2.0) means larger hole and more light into the film or CCD, hence shorter required exposuring time. But, smaller aperture no. comes with shorter depth of focus, which means if the fish is perpendicular to the camera, you may only get few mm of clear focused fish. Must find a balance between.

[Danny]

Thanks for the info guys! Very informative. :) Nice visual effects blackwater. :)

Thanks again, appreciate your help.

Danny

[dR.sLUM]

Hi guys...I'm interested in taking pictures of fishes in the tanks but everytime I took a shot...the fish just turned out to have flashy eyes and sometimes the light reflected on the glass(is it becoz of the flash??)

Oh Btw, are u guys talking about digital camera here or manual ones??

[blackwater]

Basics of photo taking is the same regardless whether its digital or film.

Yes flashy eyes and reflection on glass is mainly caused by flash or light being reflected off it. I think its the same when you see some photoes have the red eye effect.

[Exo Flammer]

For the tank reflection, you could fix a poloriser on your lens so that it would limit the reflection. However, it would cut down the amount of light that's going onto your film.

Otherwise you either detatch your flash by using a flash syncro cord and find an angle that won't cause the reflection.

BTW the higher your ISO (International Standards Organisation)or ASA (American Standards Assoc.) value, the lesser smooth your picture is.

The high speed films ISO 400 and above are used to capture fast moving object at the expense of the picture quality due to the size of the colour sensitive crystals on the film. So you're picture would seem to be abit rough, and if you blow it up to A4 size, it becomes very rough and grainy.

The low speed films ISO 200 and below, are used to capture high lighting and slow moving objects. The quality is better with the finer colour crystals and blowing it up to A4 size should not be a problem.

But if you're going for a poster size.... You'll have to get a 6X6 cm or 6X7 cm camera. Usually ppl who use this are those bridal shops! That's how they blow you wedding photos so BIG and look so FINE!!! (Sorry, this doesn't apply to digital cams)

[CDM]

Bro E-Dogg, this one is superb.....