So you've got an eye for a good photo and can use a computer? Why not sell your photos on sock photography sites? There is plenty of opportunity for keen photographers to make a little extra cash and there is also opportunity to make lots of it!

Amateur photographers with small volumes of images can make enough money to help develop their skills and buy new equipment so there is good reason to try the online stock photography phenomenon. Experienced photographers with hundreds of images monthly can make a significant part of their living.

Stock photography sites like iStockphoto for one, allow you to sign up free of charge and start uploading your image files. They accept good quality jpegs and vector images as well as videos and each file will attract a value based on its quality and size. You are then credited with a royalty for downloads of your files.

The payment to you might be just cents but consider that this for every time an image is downloaded and it starts to add up. A very popular image might fetch you $50 in a month just for that image. If you have an eye for good images and can see what is in demand you can make lots! By the way sites like iStockphoto actually help you learn to spot trends and demand and you can upload hundreds of images.

There are some rules fairly common to all stock sites such as providing model releases where people are the subject of the photo or are at least recognizable in it. The stock sites have similar requirements on this but typically will want to see the persons signed consent form and a copy of their ID. A witness signature may also be required.

You should avoid using any recognizable brand or logo type images and even well know buildings can be subject to this too. Any image that might be considered a brand or subject to copyright and trademark protection is to be avoided unless you have the paperwork giving you permission for its use.

Make sure you comply with the site guidelines for filesize and type and of course rotate and crop your images appropriately. Remember they have to catch the eye of the potential buyer among all the other images available.

You will need to carefully consider the kind of keywords someone might use when searching for images like the ones you are selling. These keywords can be input on the site you upload to but its bettter to include them in the metadata of the images themselves as this will save you heaps of time when it come to uploading your work.

So whats stopping you?