Techniques Photography
Photography techniques help?
i’m a beginner when it comes to photography.
I want to take shots of people jumping, walking or simply moving so i set the shutter speed to 500(or any fast shutter speeds) but the picture always becomes dark.. why is this happening? any help?
well, let’s say i don’t want to use flash, what should my f stop or ISO be like?
I’m using a D90 camera.
shutter priority or manual
Exposure is a triangle composed of three variables: ISO, shutter speed and f-stop. Changing ISO affects one or both of the other two. Leave the ISO at a set value and changing the f-stop affects the shutter speed just as changing the shutter speed affects the f-stop.
Lets look at this using the “Sunny 16 Rule” which states: “On a sunny day, set your f-stop to f16 and your shutter speed to 1/ISO.” So if we’re out on a sunny day using ISO 100 here is the shutter speed/f-stop relationship:
f16 @ 1/100 sec.
f11 @ 1/200 sec.
f8 @ 1/400 sec.
f5.6 @ 1/800 sec.
f4 @ 1/1600 sec.
f2.8 @ 1/3200 sec.
Now if we’re indoors its a whole different situation. Suppose we’re in a room with average light. If we try to use ISO 100 we will get very slow shutter speeds – perhaps as low as 1/4 sec. at f2.8. Obviously we won’t be stopping any motion. As we increase the ISO our shutter speed will increase (leaving the f-stop at f2.8): 200 = 1/8 sec.; 400 = 1/15 sec.; 800 = 1/30 sec.; 1600 = 1/60 sec.; 3200 = 1/125 sec. If your lens is slower than f2.8 (maybe f3.5 or f4) your shutter speeds will be even slower than our hypothetical example.
What we need is a faster lens, like a 50mm f1.4. At ISO 100 with the f1.4 lens our shutter speed becomes 1/15 sec.; at 200 its 1/30 sec.; at 400 its 1/60 sec.; at 800 its 1/125 sec.; at 1600 its 1/250 sec.; at 3200 its 1/500 sec.
NOTES:
1) To be honest, I’ve really no idea what constitutes a room with “average light”. Perhaps 2 lamps with 150 watt bulbs? A room with a large north-facing window?
2) The shutter speeds I used for the indoor examples are from my FotoSharp “Day & Night Exposure Guide” and are based on a mechanical shutter. Since the shutter in your D90 is electronically controlled your shutter speeds would be different but similar. The ISO/shutter speed relationship at a constant aperture is still valid.
3) I used shutter speeds based on an electronically controlled shutter for the “Sunny 16″ examples. Back in the day of mechanical shutters we used the shutter speed closest to the ISO: 1/125 sec. at f16 using ISO 100.
Focus Stacking – a macro photography technique
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