Your campaign is very attractive, has a lot of clear information and nice, appealing images. I think your price points are realistic. The one thing that stood out as missing is some higher level backer rewards for people who maybe want to contribute more or have slightly different interests. Could you offer an experience? A training session in photography and using the filters, or a class that you can teach, whether online or in person? What about high resolution prints of some of the images you have taken?
Write a press release using CrowdfundingPR and send it to various sites and bloggers that are in the photography field. Perhaps you could suggest writing a guest post about photography filters that can end with a plug for your kickstarter. You will need to drive more traffic to hit your goal, but you do have a lot of time.
One area you should target is Twitter. I have had a lot of success with it so i think it is worth trying to help drive traffic. There are also sites such as kickingitforward and pitchfuse that are worth exploring. Anything that will get your project turning up in the search engines.
Does that help at all? Good luck with the project.