The Pro8mm Filter Rental Kit includes 5 filters for various lighting situations. All are adapted to 58mm, which will work with the Pro814 and the Classic Pro. Price per day. See Details for Filter Descriptions 85 filter - The 85 filter will produce natural colors when shooting tungsten film in daylight conditions. Using Tungsten film in daylight will produce a bluish cast in the picture. The 85 filter will neutralize this to color balance the tones. The warming effect of this filter requires a 0.6-stop increase in exposure for normal results. 80A filter- The 80A filter helps to increase the color temperature when using daylight-balanced film in tungsten-lit conditions. The cooling effect of this filter requires a 2-stop increase in exposure for normal results. Filter factor of 4 requires a 2-stop increase in exposure. ND Filters-Tiffen Neutral Density Filters reduce the amount of light passing through the camera lens. Best used in bright light conditions to help prevent over-exposure. Eliminates overly bright, washed-out images, balances exposure and controls depth-of-field. ND 9 filter- This filter reduces the light coming into the camera by 3 stops. ND 6 filter- This filter reduces the light coming into the camera by 2 stops. ND3 filter- This filter reduces the light coming into the camera by 1 stop. You can stack all 3 ND filters for reducing the light 6 stops.