There are ceratain steps that you have to go through to get the camera. Someone told me that you have to show somebody the moon, but that isn't so. I'll get into that later.
Step One: Get camera.
(Can be done when you first get to Windfall)
On Windfall Island there is a jailcell. In the jailcell is Tingle. In order to get the camera, you must first free Tingle. To do that, you must find the switch hidden behind the vases and step on it.
After Tingle is free, roll into the box. Navigate yourself through the maze, crawling to get to the end. Avoid wood planks as this gets you tossed out by some mice. You then go into a room and in that room is a treasure chest. In it is a camera. There are also instrucitons on how to use the camera in there. Use one of the mice to get out quick.
Step Two: Become the photographers assitant
(Can be done when first on Windfall Island)
Talk to him and he'll show you his gallery. He'll then ask you to be his assistant. He then gives you three tasks to complete.
1. Get a picture of a man sending a love letter.
This is the man in the red clothing. If you watch carefully, he goes and puts a letter into the mailbox. For this picture you need.
a. A full body shot of him.
b. One that shows who he is.
c. Catch the action of him putting the letter into the box.
2. Take a picture of a person who is very timid.
This man is up in the bar. When you knock off cups, he jups and shivers. What you do is get up on one of the counters and push the cup to the edge, not knocking it off. Line up the camera, then knock the glass of and get your picture. It may take some practice.
What you need for this photograph.
a. Full body shot.
b. Be able to see his face.
3. Picture of two people.
Supposidly these two people are in love and they greet each other. It is the girl in the yellow dress and the buy walking. As before, it needs to be full bodied. You need to catch them as they are greeting each other.
Finish this and you are officially his assistant.
Step Two - Obtain Firefly
(Can be done as soon as you have a bottle and have been to Forest Haven.)
Basically, run around until you catch a firefly. Take it back to the photographer and wallah, you have a colored camers.