Results 1 to 7 of 7

Thread: Light tutorial for newbies

  1. #1

    Default Light tutorial for newbies

    Hi to all newbies i would really like to share my knowledge to you all about lights and since we photographers depend on lights so i think its best if i share it with u guys..(i hope the admins and mods will approve)

    What is light?

    light is that narrow bend of electromagnetic radiation to which the human eye is sensitive. there are no exact boundaries to the range of visible light, as individuals differ. technically our eyes are receptive to a range of wavelengths of light between 400-700 nanometres(nm) . (a nanometer is one millionth of a millimeter.)
    There is a radiant energy above and below the limits of the visible spectrum: above violet is described as ultraviolet, below red as infrared. Imaging systems (film and digital) can pick up these 'colours' and fold them back into visibility.

    Light has three physical properties that interest the photographer - amplitude (or intensity) , the wavelength or frequency and the angle of vibration (or polarization) . in laymans term , intensity can be thought of as the brightness of light and the frequency or wavelength determines its color. we can barely perceive changes in palorization but this phenomenon can be manipulated photographically with polarizing filters.

    Light travels in straight lines , which is why we get shadows , it is also reflected off a mirror or silvered surface at the reverse angle to which it falls , like a billiard ball hitting a cushion. knowledge of these simple facts allows photographers to shape light using cutters and reflectors , light can also be bent (refrected) , which mean we can design lenses to focus image

    Without lights , there are no colors, A green pepper only looks green if the corresponding wavelengths (colours) are present in the illuminating light . in orange light that contains no green , a green pepper will look grey and colourless..

    We have a photographic definition of the light that contains all the colours and is therefore white - 'daylight' - but photographers use this term in a precise way and it is not quite what you may think. All out 'white' light comes from radiating energy sources - The Sun, metal filaments heated by electric current (light bulbs) the light burst from an electric arc (flash gun). There is some implied connection with heat, Photographers use the idea of colour temperature - a spectrum derived from looking at the colours of abject as they heat up - to describe a precise colour of a light source, be it blue-white or yellow-white , understanding colour temperature and how to control or adjust it is vital to film and digital camera....

    Thats all folks and if the admins or mods approve it i will post again..Thanks..
    No photographer is as good as the simplest camera

  2. #2
    Moderator Clown's Avatar
    Join Date
    Mar 2003
    Location
    Singapore
    Posts
    3,779

    Default Re: Light tutorial for newbies

    i dont see a problem with this kind of sharing but at the moment this looks more like a science lesson.
    sigh.

  3. #3

    Default Re: Light tutorial for newbies

    Quote Originally Posted by Clown View Post
    i dont see a problem with this kind of sharing but at the moment this looks more like a science lesson.
    hehehe, just trying to share a thing or two with all the brothers and sisters of clubsnap
    No photographer is as good as the simplest camera

  4. #4

    Default Re: Light tutorial for newbies

    i don't really think of all that when i shoot a photograph.......

  5. #5
    Member lamergod's Avatar
    Join Date
    Feb 2009
    Location
    Fratton Park, Portsmouth
    Posts
    1,511

    Default Re: Light tutorial for newbies

    LOL it looks like it's taken from my Sec 2 science textbook about the 7 colours and all LOL

  6. #6
    Member
    Join Date
    May 2008
    Location
    East
    Posts
    293

    Default Re: Light tutorial for newbies

    Too technical, this could be better if this is a more practical type of lesson. Good effort anyway

  7. #7
    Member dingaroo's Avatar
    Join Date
    Dec 2009
    Location
    Singapore | East
    Posts
    1,950

    Default Re: Light tutorial for newbies

    Quote Originally Posted by sheaffey View Post
    Hi to all newbies i would really like to share my knowledge to you all about lights and since we photographers depend on lights so i think its best if i share it with u guys..(i hope the admins and mods will approve)

    What is light?

    light is that narrow bend of electromagnetic radiation to which the human eye is sensitive. there are no exact boundaries to the range of visible light, as individuals differ. technically our eyes are receptive to a range of wavelengths of light between 400-700 nanometres(nm) . (a nanometer is one millionth of a millimeter.)
    There is a radiant energy above and below the limits of the visible spectrum: above violet is described as ultraviolet, below red as infrared. Imaging systems (film and digital) can pick up these 'colours' and fold them back into visibility.

    Light has three physical properties that interest the photographer - amplitude (or intensity) , the wavelength or frequency and the angle of vibration (or polarization) . in laymans term , intensity can be thought of as the brightness of light and the frequency or wavelength determines its color. we can barely perceive changes in palorization but this phenomenon can be manipulated photographically with polarizing filters.

    Light travels in straight lines , which is why we get shadows , it is also reflected off a mirror or silvered surface at the reverse angle to which it falls , like a billiard ball hitting a cushion. knowledge of these simple facts allows photographers to shape light using cutters and reflectors , light can also be bent (refrected) , which mean we can design lenses to focus image

    Without lights , there are no colors, A green pepper only looks green if the corresponding wavelengths (colours) are present in the illuminating light . in orange light that contains no green , a green pepper will look grey and colourless..

    We have a photographic definition of the light that contains all the colours and is therefore white - 'daylight' - but photographers use this term in a precise way and it is not quite what you may think. All out 'white' light comes from radiating energy sources - The Sun, metal filaments heated by electric current (light bulbs) the light burst from an electric arc (flash gun). There is some implied connection with heat, Photographers use the idea of colour temperature - a spectrum derived from looking at the colours of abject as they heat up - to describe a precise colour of a light source, be it blue-white or yellow-white , understanding colour temperature and how to control or adjust it is vital to film and digital camera....

    Thats all folks and if the admins or mods approve it i will post again..Thanks..
    Did you copy this from somewhere verbatim? Please say you didn't ...
    A picture a day keeps the blues away!

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •