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Old Jun 28, 2010, 1:42 AM   #21
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Originally Posted by pbjunkiee View Post
whoa whoa whoa....

Break a second....

when we say a lens is fast, we mean the aperture, or the amount of light it lets in. Its like the pupil of you eye.

the lower the number the bigger the aperture, the "faster the lens"

your 18-55 is the 3.5-5.6 right?

and the 50mm is 1.8 so it can let in more light quicker than the 3.5 of your lens.

your d50's shutter will only do 1/4000 of a second no matter which lens you have on there, but you will rarely use it that fast, even for skate.

you may want to go read up and get an idea of how this new camera of yours works
No I know what I mean. I meant It's fast. As in f1.8 is a huge hole so if I shoot at 1/1000th at f1.8 it won't be pitch black.
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Old Jun 28, 2010, 1:45 AM   #22
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The Tamron 70-300 Di LD does all of that, does it better, and it's cheaper.

Sigma 70-300mm f/4-5.6 DG Macro APO (Tested)
Tamron 70-300mm f/4-5.6 Di LD Macro 1:2 AF (Tested)

And, yeah, when people say a lens is fast, they mean it has a large aperture, which allows you to use a faster shutter speed. The lens doesn't actually increase the shutter speed drectly. And, in fact, the 50/1.8 isn't particularly fast to focus, and its large aperture means shallower depths of field, which makes accurate focus more important. While it is excellent for low light photography, I don't think it will serve your action photography the way you think it will.
Well, I don't really like my 18-55mm. The zoom is pretty short and the DOF is not very shallow...

So you think I should get the tamron over the sigma by far?
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Old Jun 28, 2010, 6:36 AM   #23
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So you think I should get the tamron over the sigma by far?
The Tamron is better than the Sigma, but not "by far" because the difference isn't great. If you want a good lens in this range, there's the Nikon AF-S 70-300 VR, but it's a lot more expensive. The Tamron is cheaper than the Sigma, and it's slightly better, and that makes it a better choice all around.
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Old Jun 28, 2010, 2:14 PM   #24
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The Tamron is better than the Sigma, but not "by far" because the difference isn't great. If you want a good lens in this range, there's the Nikon AF-S 70-300 VR, but it's a lot more expensive. The Tamron is cheaper than the Sigma, and it's slightly better, and that makes it a better choice all around.
Okay because there is a huge debate on which is better. I've checked many forums. They said that Tamrons image quality is better than sigmas at 300mm but tamrons build is really plasticy and cheap when sigmas is more solid and heavier. Overall i'd rather have good image quality but I also don't want a broken lens from being too plasticy. Wow this is a hard choice but if a pro like you thinks the tamron is better+cheaper I will most likely buy it.
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Old Jun 28, 2010, 4:04 PM   #25
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Look for yourself:

Sigma 70-300mm f/4-5.6 DG Macro APO (Tested)
Tamron 70-300mm f/4-5.6 Di LD Macro 1:2 AF (Tested)

The Sigma has a little less CA and may be a little sharper wide open at some focal lengths, but stopped down one stop, the Tamron is a lot sharper than the Sigma at every focal length.

BTW, I'm not a pro.
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Old Jun 28, 2010, 4:53 PM   #26
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but 70 is no bueno for skate.....
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Old Jun 28, 2010, 5:07 PM   #27
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but 70 is no bueno for skate.....
Yes true I wont use that lens for skate but I need a telephoto for lots of other things. So whats cheap lens for skate that is decent? Like no more than $200.
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Old Jun 28, 2010, 5:19 PM   #28
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nikon 18-55 should do the trick, and they are sub 100 in some places.

just saw a 70-300 on keh for like 133 bucks
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Old Jun 28, 2010, 5:24 PM   #29
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nikon 18-55 should do the trick, and they are sub 100 in some places.

just saw a 70-300 on keh for like 133 bucks
I have an 18-55mm but I hate it really I do. Plus I can only use like 1/800th in broad daylight.
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Old Jun 28, 2010, 5:30 PM   #30
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look into a 20mm 2.8 would be the only lower light prime on that end of the spectrum.... and use some fill flash for daylight skate....

and you dont need 1/1027834 for skate.....

i usually stay at like 400-1000 for it depending... so 3.5 will surfice..... some of these were shot at f8










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