egrow wrote in post #5764354
Phil Light
I think the color tint is caused by my flash and was wondering if a filter or setting would take care of this yellowish coloring on a green hummingbird
Could you post a good example of what you're seeing? Of the shots I looked at, I don't see a yellow tint. That's why I tend to wonder if the problem is your monitor and not your flash. Either way, I still think that even if your flash is causing a slight tint, you'll have much better luck setting a custom WB (which is free btw) rather than buying a filter and hoping it solves the problem.
Look at it this way, you're mixing ambient light with flash. Whenever you do that you are most likely exposing the image with two different colors of light. This is difficult, if not imposible to fix later. Depending on how much of the light in the scene comes from your flash and how much comes from the ambient daylight, the difference you're seeing will vary from shot to shot. If you are using a filter, you're stuck with that amount of correction. If you use a custom WB you can set it differently depending on the difference in distance you are to the subject, or the difference in how intense your flash is set. Does this make sense at all? I'm starting to think I'm rambling. 
Also, are you shooting jpeg or raw? You'll have a lot of room to play with white balance and tint if you're shooting raw.