Explaining Filters, camera filters are out of the box solution and you don't need to do a lot of PP. This are for Straight Out Of Camera (SOOC) enthusiast or anyone for special effects like taking a landscape and even protrait.
I got my partial Cokin P system and some few rectangular filters. Hope this will help you to understand about filter system.
These are my talents. Matthew (6 y/o) and Thea (4 y/o) and they are my kids... They enjoy posing while I take pictures of them but when it takes long time they get bored so I have to do it quick....
Goal: To have a good portrait with a crisp and clear picture and good light.
Setup:
1) 2x Speedlight
2) 1x Remote Trigger for Speedlight
3) Tripod
Lighting: I use 2 lights system Key light (position: on the left of model) and Fill light (position: bounced at the right of the model and set as Slave)
It's not photoshop neither any programs.... It was shot using BULB straight out of camera (SOOC) just did a crop and color temperature from white to blue.
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