Compound Eyes 24 Feb 2011

I caught it resting on the leaf of one of my potted plants outside my house at 2am in the morning.

This common housefly was quite docile and allowed me to take many shots with flash.

That was until it realized of the intruder to its peaceful rest and turned around to face me.

That momentary confrontation allowed me to take a final portrait shot of its compound eyes before it dismissed me as a nuisance and flew into the night.

Turn around and confronted the intruder before it flew away

Some sharpening was applied via GIMP and using the "unsharp mask" filter to enhance the details of the compound eyes.

Wanna know the list of current camera gear I am using?

ISO, APERTURE, SHUTTER SPEEDS and EXPOSURE

This article below was a casual writeup by me on Clubsnap forums, where it first appeared. I was writing a reply to (Sam Goh) my brother-in-law's post in his thread where he was asking for some guidance in using his Canon G12.

Higher ISO [ more sensitive to light, allow for bigger apertures (smaller F numbers) and shorter (faster) shutter speeds to achieve the correct exposure ]
However, as ISO goes higher, your picture will turn out less sharper.
Lower ISO will result in sharper images.

Higher F numbers (aka smaller apertures) will result in sharper pictures but will require shutter speeds to be longer to achieve the correct exposure.

Faster shutter speeds will prevent handshake blur and reduce subject motion blur but will require an decreasing F number [ larger apertures ] in order to achieve the correct exposure.

On the other hand, slower shutter speeds is sometimes preferred to capture the motion blur intentionally [ ie moving headlights on road at night ]

This formula served me well

Perfect exposure = (F number)/(Shutter speed)
ie Shutter speeds are inversely proportional to the aperture.

And if the metering system of the camera still shows that the pic is under or over-exposed when u have reached the limits of both the apertures and shutter speeds of the camera and still unable to achieve the correct exposure...

It's time to up the ISO.

My advice.
indoors during the day : ISO400
indoors at night with fluorescent lighting : ISO800 (ISO400 if using external flash)
outdoors during sunny day : ISO100
outdoors during overcast day : ISO200
outdoors during night : ISO800 and above depending on intended exposure time(shutter speed) and flash or non flash
For long night exposure outdoors, can try ISO100 for landscape with long exposures.



Last but not least,

Taking a photograph is like filling a bucket of water..[ aka achieving correct exposure ]

How long you wanna open the tap for [ shutter speed ] 
and
What is the diameter of the water pipe outlet [ aperture ]?

The 2 critical factors and have different values and will eventually fill up the bucket..

The only question left is how fast you wanna fill it up.

Wanna know the list of current camera gear I am using?