The Lens of canon eos 500D or T1i
Wednesday, December 23, 2009
The Lens
One of the great things about an SLR like the EOS 500D is that you can remove the
lens and replace it with another. Interchangeable lenses allow you to build a lens
collection tailored to the way you like to shoot. For example, if you’re a nature
shooter who likes a long reach, you can invest in telephoto lenses; if you’re a landscape
shooter, you might want to weight your collection toward wide-angle lenses.
Because you can remove the lens, you can choose to upgrade lenses later and
improve the quality of your images without having to replace the entire camera.
Removable lenses also give you the option to add specialty lenses, such as fisheye
lenses for creating stylized pictures or tilt/shift lenses for architectural work.
Depending on the configuration you purchased, your Rebel T1i may or may not
have come with a lens. If you bought the Rebel T1i kit, you probably have an 18–
55mm zoom lens or an 18–200mm. You should already be practiced at mounting
and unmounting a lens, as detailed on pages 33–34 of your Rebel T1i manual.
Ideally, you want to leave the camera body open for as little time as possible. As
you learned in the previous section, just inside the body is the mirror that reflects
light up into the viewfinder, and behind that is the shutter and image sensor. You
don’t want to get dust or dirt on the image sensor, because any type of debris on
the sensor will show up on your images as dark splotches. The less time you leave
the camera body open, the less chance dust will get inside.
If you have more than one lens, you’ll find that, over time, you will work out a
coordination that allows you to remove one lens, hold it, and get the other lens
on with minimal exposure of the camera body. Obviously, you have to be careful
not to drop anything. Keeping the camera around your neck with the included
strap will free up your hands enough to manage a lens change.
Understanding Focal Length
If you wear glasses, you are probably already familiar with the idea that a thicker
lens provides more magnification. The same is true for your camera lenses—a
longer lens provides more magnification.
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One of the great things about an SLR like the EOS 500D is that you can remove the
lens and replace it with another. Interchangeable lenses allow you to build a lens
collection tailored to the way you like to shoot. For example, if you’re a nature
shooter who likes a long reach, you can invest in telephoto lenses; if you’re a landscape
shooter, you might want to weight your collection toward wide-angle lenses.
Because you can remove the lens, you can choose to upgrade lenses later and
improve the quality of your images without having to replace the entire camera.
Removable lenses also give you the option to add specialty lenses, such as fisheye
lenses for creating stylized pictures or tilt/shift lenses for architectural work.
Depending on the configuration you purchased, your Rebel T1i may or may not
have come with a lens. If you bought the Rebel T1i kit, you probably have an 18–
55mm zoom lens or an 18–200mm. You should already be practiced at mounting
and unmounting a lens, as detailed on pages 33–34 of your Rebel T1i manual.
Ideally, you want to leave the camera body open for as little time as possible. As
you learned in the previous section, just inside the body is the mirror that reflects
light up into the viewfinder, and behind that is the shutter and image sensor. You
don’t want to get dust or dirt on the image sensor, because any type of debris on
the sensor will show up on your images as dark splotches. The less time you leave
the camera body open, the less chance dust will get inside.
If you have more than one lens, you’ll find that, over time, you will work out a
coordination that allows you to remove one lens, hold it, and get the other lens
on with minimal exposure of the camera body. Obviously, you have to be careful
not to drop anything. Keeping the camera around your neck with the included
strap will free up your hands enough to manage a lens change.
Understanding Focal Length
If you wear glasses, you are probably already familiar with the idea that a thicker
lens provides more magnification. The same is true for your camera lenses—a
longer lens provides more magnification.
[get this widget]
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