Similaar Foto tutorials
English
- Espaņol
Equipment
recommendations
Flaat
Picture Styles
Lens tests
Sharpness
- Bokeh

Basic photography tutorial

 
HOME
 


 
Foto tutorial (English)
Foto tutorial (Espaņol)
 


 
Equipment recommendations US-ES
 


 
Flaat for Canon
Flaat for Nikon
Flaat for the BMC
Flaat for NEX-5N
Old Picture Style Tests
 


 
LENS TESTS
a7s stills
a7s video
550D stills
550D video
550D video lineskip
5D2 stills
5D2 video

Conclusions
APS-C vs Full Frame
ND filters
Other filters


BOKEH TESTS
Summary
Alternative scenarios
 


 
Badly assembled lenses and image quality
Lens mount compatibility chart
ISO on different cameras
High ISO on the 5D3
DIY: DR test chart
RGBWK Bayer sensors


DoF/FoV CALCULATOR
Notes on DoF-FoV
Notes on crop-DoF-FoV


Custom Cropmarks for Magic Lantern on the Canon 550D


How many megapixels do I want?
How many megapixels can I see?


Quick Monitor Calibration Chart


MY VIDEOS


Random rants


Search engine


Exposure

Shutter Speed

Shutter speed is a parameter that controls how long light is hitting the sensor. It is usually measured in parts of a second (e.g. 30 means 1/30s, that is, "a thirtieth of a second").

By halving this number, we double the amount of light captured in the image (with a shutter speed of 30 we get twice as much light as with a shutter speed of 60). Just like aperture, most cameras allow you to control shutter speed in thirds of a stop (with three clicks you allow twice as much light in: 60-50-40-30) or half stops (two clicks: 60-45-30).

Defining quantity of light = 1 with 1/250 in a completely arbitrary manner, the following table shows how much light is allowed in with some common shutter speed options:

speed15306012525050010002000
light1684210.50.250.125


The problem with increasing the amount of light captured in the image by reducing the shutter speed is that we also increase the probability of getting blurred pictures.
First, because the world moves: if you're taking a picture of a running child, you'll probably need to set your shutter speed at 1/125s or faster.
And second, because the camera moves. This depends on your ability, but a simple rule is as follows:
Unless you're using a tripod or some other steady support, in general your pictures will be blurred if shutter speed is not at least equal to the equivalent focal length you're using (e.g. with my 35mm lens on a 1.6x sensor, I have to use at least 1/60s)

Keep in mind that with very long lenses this can be a problem: with my 300mm on APS-C, this rule leads me to 1/500s, but given that this lens is really heavy and this makes my camera even more shaky, I have to use at least 1/1000s; even in a sunny day, this means I have to compensate by pushing the other two parameters that control exposure (aperture and ISO); the alternative is to simply use a tripod.

An advantage of modern times: if you're using a lens with optical stabilization (IS, VR, VC, or however the lens maker calls it), you can allow yourself one or two stops slower speed (in my previous example, 1/30s or even 1/15s). This is very useful for landscapes, not so much for children (the stabilizer won't make the kids stand still).





Previous      Next








please visit my equipment recommendations





Copyright Similaar 2011 -- similaar.feedback@gmail.com -- @Similaar
Similaar is a participant in the Amazon Services LLC Associates Program and the Amazon EU Associates Programme, two affiliate advertising programs designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com and amazon.es.