CO-RELATION OF ISO↔APERTURE↔SHUTTER SPEED

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PROJECT To depict inter-relation between ISO Aperture Shutter Speed BEFORE SETTINGSAFTER SETTINGSFocus ManualWhite Balance AutoMetering Center Weighted AverageFocal Length 55mmFlash Rear Curtain SyncRelease Mode Timer 2 secondsShutter Speed Pointer at Zero

Focus ManualWhite Balance AutoMetering Center Weighted AverageFocal Length 55mmFlash Rear Curtain SyncRelease Mode Timer 2 secondsShutter Speed Faster by 1/10 sec

GUIDE Shri Adil Gazdar

ISO100ISO200ISO400ISO800ISO16001/3 sec 1/2.5 sec 1/2 sec 1.3 sec 2.5 sec 4 sec 13 sec 20 sec 25 sec 30 sec

f5.6 f7.1 f10 f13 f16 f20 f25 f29 f32 f36

1/2.5 sec 1/2 sec 1.0 sec 1.3 sec 2 sec 3 sec 5 sec 6 sec 8 sec 10 sec

1/8 sec 1/5 sec 1/2.5 sec 1/1.6 sec 1 sec 1.6 sec 2.5 sec 3 sec 3 sec 4 sec

1/20 sec 1/15 sec 1/8 sec 1/6 sec 1/3 sec 1/2 sec 1/1.3 sec 1 sec 1.6 sec 2 sec1/40 sec 1/25 sec 1/10 sec 1/4 sec 1/2 sec 1 sec 1.6 sec 2 sec 2.5 sec 3 sec BEFORE Shutter Speed pointer set @ Zero

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ISO100ISO200ISO400ISO800ISO16001/30 sec 1/25 sec 1/20 sec 1/8 sec 1/4 sec 1/2.5 sec 1.3 sec 2 sec 2.5 sec 3 sec f5.6 f7.1 f10 f13 f16 f20 f25 f29 f32 f36

1/25 sec 1/20 sec 1/10 sec 1/8 sec 1/5 sec 1/3 sec 1/2 sec 1/1.6 sec 1/1.3 sec 1 sec 1/80 sec 1/50 sec 1/25 sec 1/15 sec 1/10 sec 1/6 sec 1/4 sec 1/3 sec 1/3 sec 1/2.5 sec 1/200 sec 1/160 sec 1/80 sec 1/60 sec 1/30 sec 1/20 sec 1/13 sec 1/10 sec 1/6 sec 1/5 sec 1/200 sec 1/200 sec 1/100 sec 1/40 sec 1/20 sec 1/10 sec 1/6 sec 1/5 sec 1/4 sec 1/3 sec

AFTER Shutter Speed made faster by 1/10 sec

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M CWA ISO 100 Flash Rear curtain sync FL 55mm WB Auto Shutter Speed 1/3.0 sec

f5.6Shutter Speed 1/30 secBEFOREAFTER

M CWA ISO 100 Flash Rear curtain sync FL 55mm WB Auto Shutter Speed 1/2.5 secf7.1Shutter Speed 1/25 secBEFOREAFTER

M CWA ISO 100 Flash Rear curtain sync FL 55mm WB Auto Shutter Speed 1/2 secf10Shutter Speed 1/20 secBEFOREAFTER

M CWA ISO 100 Flash Rear curtain sync FL 55mm WB Auto Shutter Speed 1.3 secf13Shutter Speed 1/8 secBEFOREAFTER

M CWA ISO 100 Flash Rear curtain sync FL 55mm WB Auto Shutter Speed 2.5 secf16Shutter Speed 1/4 secBEFOREAFTER

M CWA ISO 100 Flash Rear curtain sync FL 55mm WB Auto Shutter Speed 4.0 secf20Shutter Speed 1/2.5 secBEFOREAFTER

M CWA ISO 100 Flash Rear curtain sync FL 55mm WB Auto Shutter Speed 13 secf25Shutter Speed 1/1.3 secBEFOREAFTER

M CWA ISO 100 Flash Rear curtain sync FL 55mm WB Auto Shutter Speed 20 secf29Shutter Speed 2 secBEFOREAFTER

M CWA ISO 100 Flash Rear curtain sync FL 55mm WB Auto Shutter Speed 25 secf32Shutter Speed 2.5 secBEFOREAFTER

M CWA ISO 100 Flash Rear curtain sync FL 55mm WB Auto Shutter Speed 30 secf36Shutter Speed 3 secBEFOREAFTER

M CWA Flash Rear curtain sync f29 FL 55mm WB Auto Shutter Speed 20 secShutter Speed 2 secBEFOREAFTERISO 100

M CWA Flash Rear curtain sync f29 FL 55mm WB Auto Shutter Speed 6 secShutter Speed 1.6 secBEFOREAFTERISO 200

M CWA Flash Rear curtain sync f29 FL 55mm WB Auto Shutter Speed 3 secShutter Speed 1/3 secBEFOREAFTERISO 400

M CWA Flash Rear curtain sync f29 FL 55mm WB Auto Shutter Speed 1 secShutter Speed 1/10 secBEFOREAFTERISO 800

M CWA Flash Rear curtain sync f29 FL 55mm WB Auto Shutter Speed 2 secShutter Speed 1/5 secBEFOREAFTERISO 1600

ISO increase from 100 to 1600 Rise towards higher ISO number, indicates an increase in sensor sensitivity to light.As ISO gradually increased, shutter speed became faster to prevent excess light from hitting the sensor. It implies sensor required less light to expose the image. Lower ISO number is less sensitivity indicating more light required to properly expose, which was compensated by slower shutter speed.LARGER [f5.6] TO SMALLER [f36] APERTURE AT SAME ISOAs the aperture number increased from f5.6 TO f36 shutter speed became slower.At larger aperture size, image was blown out due to excess light and shallower depth of field. As the aperture narrowed down the depth of field increased and subject came into sharp focus.While using same flash power for different apertures, it was observed that larger size aperture photos were highly overexposed. As the aperture size steadily narrowed down to f36 the photos were uniformly lit. This is because flash power is controlled by aperture.OBSERVATIONS

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