Sorry not correct...

I think graphics is a plural uncountable noun.  You can say 'Send me your photos for free graphics'  Or 'Send me your photos for a free image / graphic illustration' 

Plural uncountables

Some uncountable nouns are plural. They have no singular forms with the same meaning, and cannot be used with numbers. Common examples are: groceries, arms, remains, goods, customs, clothes, thanks, regards, police etc.

The police are searching for a white man in his twenties.
Have you bought the groceries? (NOT Have you bought the grocery?)
Many thanks for your help.
Other plural uncountable nouns include trousers, jeans, pyjamas, pants, scissors, spectacles etc.

http://www.englishgrammar.org/plural-uncountable-nouns-2/

Help me :D

is it correct to say..Send me your photos for a free graphics