Originally posted by: vi_edit
Originally posted by: alfa147x
Originally posted by: 91TTZ
I just bought myself a Canon 70-200 F/4L ISand got it a few hours ago.
that lens costs
😱ur Price: $1,999.95
yeah....I'm around $200
More like $530. (for the non-IS)
I've seen them going used for around $400.
that's the regular one, 91TTZ has the IS model, which is ~1000 EDIT: bah you edited
OP: for your sister's dance program rent the canon 70-200f/2.8L USM IS. those other lenses are too slow for the low light indoor setting you'll be taking pictures in.
actually, you should probably just rent the 85f/1.4, which is two stops faster, and then use your feet to zoom. on a crop body like the digital rebel series it ends up being 136 mm, which is a medium telephoto and will be ok for indoors. also, you should get the 50 f/1.8. and then the 24 f/1.4 for some wide angle shots.
lens 'speed' is the maximum aperture divided by the focal length, and is commonly expressed as f/x.x. the lower the number x.x is, the more light comes into the camera. the more light coming into the camera due to the lens, the faster the shutter speed can be. because x.x is based on the diameter of the lens aperture, and the amount of light is based on area, the amount of light taken in by the lens doubles with each square root of 2 decrease in x.x. in other words f/2 lets in twice as much light, and can use half the shutter speed, of f/2.8. as you're capturing moving subjects, your shutter speed is limited before you get subject blur due to subject motion. what you can change is increasing the ISO sensitivity and using a faster f/x.x (of f-stop).
in other words, those 1.4 lenses are 3 times faster than that canon 75 to 300, and about 3.3 times faster than the 55 to 200.
indoor stage shows are about EV7. with a f/4.0 lens you need 1/60 of a second and ISO 800, and you'll get a blurry, grainy shot. with an f/1.4 lens you need 1/250 and ISO 400, and you'll get a much more clear, smooth shot.