During many interaction sessions, I come across questions on lens hoods -"What are they?" "How do I choose the right one?" "When should you use it?". So this time I thought of talking about lens hoods
The first question which needs to be answered is the purpose of a lens hood? Frankly speaking it serves two purposes; one is to keep away the unwanted light to get in to your lens which might be responsible for creating flares, low contrast look on your photography. The second reason would be to protect your outer element of the lens from any shock damage.
The basic purpose of a lens hood is to shade the lens to keep the sun from falling directly in to your lens and the result is everything looks crisper, sharper and easier to see. Now there is also a second purpose to a lens hood which is to act as a physical protector for your lens.
So the next question which comes in one’s mind is that why not just put the hood on there and protects it all the time?
But there are some situations where you don’t want to keep the hood on e.g. when you are intentionally trying to create lens flares for some artistic effect. Second when you don’t want people to notice you are taking photographs which with a hood on is really prominent and people might get conscious getting clicked. The third one is when you are trying to use the built in popup flash, that flash is so close to your lens that the hood can cast a shadow on your subject
So now let’s talk about how to choose the lens hood.
There is a lot of confusion amongst people about the different shapes and styles of lens hoods.
Few questions which come in mind are "How do I know what kind to buy? Are there different hoods for different purposes?” So the ans is very simple as there is only one hood for one lens. So you may be wondering, "Well, why do they come in all these different shapes and styles?" Well, that's just because each hood has been optimized--designed to be optimal--for the focal length, range of the lens that it goes onto.
Basically one would see two different styles of lens hoods. This curvy kind is called a petal style or flower style hood and it's usually designed to go on a wide angle lens, typically a wide angle zoom. And it has this shape because this shape is the best compromise between trying to provide shade for the front of your lens and not getting a piece of the hood in your shot when you're zoomed to a wide angle.
On the other hand, many fixed lenses or long range zooms have a hood that’s more like a tube and it's more protective. And this one doesn't need the cutout shape you see on a petal hood because this is a long range zoom. It's a 70-200 zoom and it’s entire field of view is a small field of view way out there. It never gets wide enough to need those cutouts like you see on a petal or flower style hood. So the bottom line is the shape of the hood is determined by the nature of your lens. So just buy the one designed for your lens and you're all set.
Different kinds & shapes of Hood as per lens specification
source
0 Response to "Lens Hood"
Posting Komentar