Focal length- Explained Part II of II
Continuing from the previous discussion about focal length, today I’ll be discussing about selecting a lens based on a focal length. As usual let me present a dilemma or a problem first. ‘What lens to buy?’ ‘What is a good portrait lens’ etc.
Equipped with the knowledge of the focal length, let us address the issue of lens of choice. I am assuming you have exhausted your 1 year with your kit lens and you want something specific for the type of photography you wanna do.
Before going into the type of photography, here is another quote for you
The Need should drive the decision for buying a gear, in this case a Lens and not the size of the wallet or whims and fancies of your impulsive mind, affected by the plethora of advertisements or promotions.
Type of Photography
So for one year you shot some birds, landscapes, some family portraits and you want to predominantly do photography in one of the areas. Say portraits. For that you want a specialized lens, a better quality and of appropriate focal length. Here is a genuine need that has arisen and you are considering it to go ahead with it. The next section is important and understand the essence of it to make your decision.
The lenses are broadly classified into 3 types based of focal length The other 3 are basically a derivative of the first three:
|Serial No.||Type of Lens||Typical Focal Length||Explanation|
|1.||Wide Angle Lens||24mm to 50mm||Gives Wide angle of view with less magnification|
|2||Normal Lens||40mm to 55mm||Typically, covers the angle of view of a human eye|
|3||Telephoto Lens||80mm to 135mm||Gives a Narrow Angle of view with higher magnification|
|4.||Super Telephoto||200mm+, 300mm, 600mm, 800mm||Specialized lenses for wildlife, bird photography|
|5.||Super Wide||12mm to 20mm||Specialized lenses for going wide say landscapes or having extreme closeups|
|6.||Fish Eye||12mm, 14mm etc||Gives an approximate 180 degree angle of view with a lot of distortion|
Please note that the focal lengths above are for a full frame body. If you are using a crop sensor body then you’ll have to adjust for appropriate crop factor. Usually you will have other classifications among these as well and people will have their own opinions on which category a particular lens should fall into. But broadly they are classified as above.
So now that we understand the focal lengths, you can decide for yourself which focal length to go for. If you want a portrait lens, get a telephoto lens with say 85mm focal length. Similarly for landscape you can have a wide angle lens.
I am not saying you cant use a Telephoto for landscapes, because you can but that discussion will be for another day, the above explanation gives you a starting point for your need for another lens.
This was my entry from the letter F for the A to Z challenge.