Hitech filters new Pro Stop range is made from its Queens Award winning CR39 dyed substrate.
The Pro Stop range has been designed for use on long exposures and is available in the full range of densities, from 1 stop through to 10 stops. They are primarily used to control the image on longer exposures allowing use of much slower shutter speeds. The visible effects created by using longer exposures is the effect of motion blur on any movement within your pictures, such as clouds, waterfalls, seas and rivers.
Regular Shutter Speed With Pro Stop 10
1000th 1 Second
500th 2 Seconds
250th 4 Seconds
125th 8 Seconds
60th 15 Seconds
30th 30 Seconds
15th 1 Minute
8th 2 Minutes
1/4 4 Minutes
1/2 8 Minutes
1 Second 16 Minutes
2 Seconds 32 Minutes
The Pro Stop filter is fitted with a foam gasket perimeter, which creates a seal between the filter holder and lens, thus reducing light spillage around the sides of the filter. NOTE –
When at the checkout stage of ordering, please can you state what holder you will be using your ProStop filter with. This is to ensure that we send you the correct sized gasket for optimum fit. Please note that the Hitech Modular, Lee & Cokin holders all utilise a 1.5mm gasket. The Formatt MK4 holders (older version) use a 3mm gasket. All 85mm filters use a 3mm gasket.
Full specificaitons and a guide to using the Pro Stop filters is available to read by clicking on the following link - Pro Stop Guide.
New & Improved Formula
Recent rigorous tweaking and testing of our formulations has enhanced the colour neutrality of the Prostop. Measured on a Spectrograph, these improvements have shown that the new Prostop IR ND has an even attenuation of light between the Visible, Near-Infra Red & Infrared wavelengths. This results in far crisper blacks thus improving your shots dramatically. So, for the photographer and cinematographer who wishes to create that dreamy/misty water effect and film makers who wish to create a cinematic look without having their picture contaminated with excess IR light, the new Pro Stop IR filter is the filter of choice.
We have had the Pro Stop 10 filter independently reviewed by two professional photographers, to view each of the articles please follow links below:http://www.dannylintonphotography.com/blog/2011/06/05/hitech-pro-nd-10-stop-review/http://blog.robertstrachan.com/archives/1314/hitech-pro-stop-review/