You will say Cheese : )
Do you have a product that is of interest to the Photographer community. I will post your message to a group of 90K - yes thats 90 thousand (and growing) photographers community.
Please make sure that your product is suitable for this group - better still you check with me before you post.
The best thing that interests this group and will get you results is if your product etc has a great picture or logo!
Putting your product in front of 90,0000 members is SURE to get results.