|Quoting SFO2SVO (Reply 2):|
I was once contacted for one of my photos to be used for 30" poster.
But they wanted 300dpi: something I could not deliver with D70+cropping...
Did they specify the required image size?
You would be surprised what can be done nowadays with cropped images. KLM used one of my severely cropped pictures as a transparent full size cover on a glass door in the KLM crew center. The result was amazingly good. I never would have thought they could do that with that image.
But back to the subject. I would ask between $250 and $350 if it is for one time use only. I doubt you will get more for it. They do not ask for a special aircraft or situation and If they have enough time before the start of the convention you might find out that $250 is still too much as they will undoubtedly find another photog in time who will do it for free. There are 1.000.000+ images to choose from.
If you really want your picture on the banner than the other option is to ask for the goody basket full of merchandising stuff...that will almost always work but on the other hand some photogs consider that spoiling the market.
Never be afraid of what you like. (Miles Davis)