Speaking at a photography seminar 'Who's afraid of photographers?' in the House of Commons arranged by the National Union of Journalists Freelance Office, Foster added that photographers need to take "collective action" in ensuring police officers are correctly trained.
"There are two key areas that we have to look at, existing legislation and the way legislation is interpreted and used by various forces of law and order," he said.
"One great piece of news is that the coalition government, through Nick Clegg, has suspended Section 44 of the Terrorism Act. But please don't say we've won because I used the word suspended. What we need to make absolutely certain is that it is actually repealed and removed, not just suspended. I think that's really important."
The Home Secretary Theresa May announced in July that police officers will no longer be allowed to use Section 44 stop-and-search powers on individuals.
In an oral statement given in the House of Commons May outlined interim measures which would "not allow the continued use of Section 44 (...) in contravention of our civil liberties".
"You need to talk about the ways in which you can engage with those law enforcement agencies, in particular the police, to help work through with them what is legitimate, and what is not legitimate," Foster added.
"That means you have to engage with police in their training procedures with new recruits. So far there has not been a great deal of success, but today I think this is something you should take collective action towards to ensure there is proper training that goes on.
"You have got a number of issues...but don't think of yourselves as a powerless group of people within the photography fraternity, because you are certainly not."
He added that in a question he asked in the House of Commons earlier in the day he was able to secure assurances that the business department would support the creative industry.
"You are part of a really important element within the economy of this country," he said.
"All the evidence is that with the right support you could within a very few years be contributing as much to the economy of this country as the financial services industry."
Journalism.co.uk will have more from this photography seminar soon.
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