Nicole
I've been looking up accessories for my Canon t4i and came across lens hoods and was wondering what their purpose was and they also come in many different lengths
Answer
Well there are two types of hoods, Petal Shape and Round Shape. Both do the same job block light from the sides where you don't get things in frame even if fully zoomed out. And most lenses.. hell very few do 180 degrees this means that light hitting the lens from the sight can get in the way of the actual light you want to capture.
In short look before you notice that left and right of your viewcone you see things but they are unsharp. That is your perifical view. In a lens for a camera you don't want that. Now what if I shine from your perifical view are a big 500Watt building light in your eyes... yeah you don't like that.
See with lenses you want only light from the area you want to capture. The rest.. is just in the way. A lenshood blocks light from coming from those area. Less light from the side means no false light. meaning more contrast. Think of it of you putting on horse caps that block your side view. Or wearing special glasses with side blockers. Maybe ski glasses.. suddenly me shining a 500Watt building light has no effect .
And that is what they do.. block light from the sides that might and do effect image quality.
Round lens hoods are simple, as in they tend to come with lenses that rotate the front as they focus. See every camera has a certain size of "frame" the sensor. And what lens hoods have to do is block all light coming from angles.. outside the lens view based upon that frame size.
Now rotation fronts mean that they have to use round ones. More expensive lenses have non rotating fronts. This means that they also can take in that the framing. For instance 3:2 means that one side of the frame is longer then the other. And petal shaped hoods make it so that the top and bottom will have longer flaps. While the sides have shorter flaps. This way they block out as much light from the sides you won't want.
In the end you get more contrast, less stray light, and no nasty side effects.
I fear though .. well a reality is that the kitlens tends to come with a WORTHLESS hood. That tiny miniskirt you can buy for your 18-55mm is worthless. Now the 55-200mm's hood is actually useful.But the 18-55mm's tiny skirt is a joke. So you don't need that particular one.
If you buy a more expensive lens with a non rotating front you'll get the petal shaped hood. And trust me you will want to use those.
Well there are two types of hoods, Petal Shape and Round Shape. Both do the same job block light from the sides where you don't get things in frame even if fully zoomed out. And most lenses.. hell very few do 180 degrees this means that light hitting the lens from the sight can get in the way of the actual light you want to capture.
In short look before you notice that left and right of your viewcone you see things but they are unsharp. That is your perifical view. In a lens for a camera you don't want that. Now what if I shine from your perifical view are a big 500Watt building light in your eyes... yeah you don't like that.
See with lenses you want only light from the area you want to capture. The rest.. is just in the way. A lenshood blocks light from coming from those area. Less light from the side means no false light. meaning more contrast. Think of it of you putting on horse caps that block your side view. Or wearing special glasses with side blockers. Maybe ski glasses.. suddenly me shining a 500Watt building light has no effect .
And that is what they do.. block light from the sides that might and do effect image quality.
Round lens hoods are simple, as in they tend to come with lenses that rotate the front as they focus. See every camera has a certain size of "frame" the sensor. And what lens hoods have to do is block all light coming from angles.. outside the lens view based upon that frame size.
Now rotation fronts mean that they have to use round ones. More expensive lenses have non rotating fronts. This means that they also can take in that the framing. For instance 3:2 means that one side of the frame is longer then the other. And petal shaped hoods make it so that the top and bottom will have longer flaps. While the sides have shorter flaps. This way they block out as much light from the sides you won't want.
In the end you get more contrast, less stray light, and no nasty side effects.
I fear though .. well a reality is that the kitlens tends to come with a WORTHLESS hood. That tiny miniskirt you can buy for your 18-55mm is worthless. Now the 55-200mm's hood is actually useful.But the 18-55mm's tiny skirt is a joke. So you don't need that particular one.
If you buy a more expensive lens with a non rotating front you'll get the petal shaped hood. And trust me you will want to use those.
Where do you buy Lens hood for a camera?
Q. Im not talking about the small lens hood for DSLR cameras ether. Im talking about the BIG lens hood like what some Sony, Panasonic or Canon cameras have.
And if you want a better picture, panavision has some examples of lens hoods here; https://www.google.com/search?q=panavision&hl=en&tbm=isch&tbo=u&source=univ&sa=X&ei=sDg9UdPdDNCFyQGguYDICQ&sqi=2&ved=0CFcQsAQ&biw=1600&bih=744
What site and or place sells the Big lens hood for cameras? Or can you only get these lens hood strictly if you buy the camera as well (or if the lens hood only comes on a certain camera?)
It would be helpful
And if you want a better picture, panavision has some examples of lens hoods here; https://www.google.com/search?q=panavision&hl=en&tbm=isch&tbo=u&source=univ&sa=X&ei=sDg9UdPdDNCFyQGguYDICQ&sqi=2&ved=0CFcQsAQ&biw=1600&bih=744
What site and or place sells the Big lens hood for cameras? Or can you only get these lens hood strictly if you buy the camera as well (or if the lens hood only comes on a certain camera?)
It would be helpful
Answer
Lens hoods are either small or large based upon the focal length of the lenses NOT the brand.
The link you gave us show what are called a matte box. They can be adjusted as necessary to produce the best protection from stray light causing lens flare. Unless you are planning on shooting with a 35 mm ARRI and zoom lens, you don't need one
http://www.flycamshoppe.com/fc/PROAIM-105mm-MB-700-Jumbo-Matte-Box-with-Side-and-French-Flags.html?gclid=CIeHtd_P87UCFaUWMgodpmIAUw
Lens hoods are either small or large based upon the focal length of the lenses NOT the brand.
The link you gave us show what are called a matte box. They can be adjusted as necessary to produce the best protection from stray light causing lens flare. Unless you are planning on shooting with a 35 mm ARRI and zoom lens, you don't need one
http://www.flycamshoppe.com/fc/PROAIM-105mm-MB-700-Jumbo-Matte-Box-with-Side-and-French-Flags.html?gclid=CIeHtd_P87UCFaUWMgodpmIAUw
Powered by Yahoo! Answers
No comments:
Post a Comment