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.
Camera: Canon EOS 500D / T1i Lens: EF-S 18-55mm f/3.5-5.6 IS Lens Exposure: 0.067 sec (1/15) Aperture: f/3.5 Focal Length: 18 mm ISO Speed: 1600 Exposure Program: AV Metering Mode: Matrix Flash: Flash did not fire
Shoot Details:
Camera: Canon EOS 500D / T1i Lens: EF-S 18-55mm f/3.5-5.6 IS Lens Exposure: 0.033 sec (1/30) Aperture: f/5.6 Focal Length: 55 mm ISO Speed: 1600 Exposure Program: AV Metering Mode: Matrix Flash: Flash did not fire
Shoot Details:
Camera: Canon EOS 500D / T1i Lens: EF-S 18-55mm f/3.5-5.6 IS Lens Exposure: 0.040 sec (1/25) Aperture: f/5.6 Focal Length: 55 mm ISO Speed: 1600 Exposure Program: AV Metering Mode: Matrix Flash: Flash did not fire
Camera: Canon EOS 500D / T1i Lens: EF-S 18-55mm f/3.5-5.6 IS Lens Exposure: 0.040 sec (1/25) Aperture: f/3.5 Focal Length: 20 mm ISO Speed: 320 Exposure Program: AV Metering Mode: Matrix Flash: Flash did not fire
They are both settings and why there is a difference, the answer to that question is I use Wide Converter Digital Concepts 0.45x wide angle conversion lens