What subject areas do you want to photograph?
KL has lots to see but is also an excellent gateway for short quick cheap (or cheapish) trips to elsewhere.
Cameron highlands (daytrip) worthwhile.
Malacca !!! - VERY good. LONG day trip possible but go for a weekend. Bus trip cheapish and not very long. Hostels cheap. Old history, people, architecture. (Tourists!).
FRIM (North KL). Good. Canopy walkway if open - ring and check explictly - internet news may be out of date.
If you have a little free $ and a few days (more is better) I'd greatly recommend a quick trip to Yogyakarta in Indonesia. A few hours flight. Air Asia does some ultra-low-cost flights if you book ahead and accept strange travel hours. Substantially cheaper than Malaysia. (I can recommend a superb and well priced guide if interested.)
Stay in one of many many grotty dirt-cheap fun hostels off Malioboro St.
Visit Borubadur !!!! - about as must-see as a photo site can get.
Prambanan - would be stunning if Borubadur was not there.
Dieng PLateau - VERY LONG day trip - the journey itself is a stunning photo opportunity - one of the most amazing day drives of my life. Area is v good as well.
Mt Merapi - volcano with attitude - and worthwhile even when quiet. Pillion motorcyle ride part way up the mountain. Sobering. Plus Merbabu near behind.
And much more ...
Note that airfares to a range of other Asian countries may cost well under $US100 - sometimes as low as about $US30 to eg Vietnam. Almost worth a weekend in a number of other countries depending on finances.
If question moved to 'Travel" this answer could be taken with it.