Timothy David Orme Posted August 20, 2006 Share Posted August 20, 2006 Most super 8 cameras are set up to shoot 18fps standard, right? So, if I'm shooting 24fps, does that mean I have to compensate my light readings/f-stops in order to get an accurate reading because 24fps lets in less light than 18fps? So, if I do compensate light, how much? Thanks again for all your help. Link to comment Share on other sites More sharing options...
Premium Member Jonathan Benny Posted August 20, 2006 Premium Member Share Posted August 20, 2006 Most super 8 cameras are set up to shoot 18fps standard, right? So, if I'm shooting 24fps, does that mean I have to compensate my light readings/f-stops in order to get an accurate reading because 24fps lets in less light than 18fps? Open up 1/3 of a stop at 24fps vs 18fps. You should check though if the camera makes this compensation on its own either to its internal reading and/or the lens stop when you change speeds. AJB Link to comment Share on other sites More sharing options...
Timothy David Orme Posted August 20, 2006 Author Share Posted August 20, 2006 Open up 1/3 of a stop at 24fps vs 18fps. You should check though if the camera makes this compensation on its own either to its internal reading and/or the lens stop when you change speeds. AJB How do I check that information? I'm shooting with a Nizo6080 and the manual I have is in German. Link to comment Share on other sites More sharing options...
Premium Member Matthew W. Phillips Posted August 20, 2006 Premium Member Share Posted August 20, 2006 I have honestly never heard of a camera that wont automatically compensate. The camera makers realize that 24fps makes a different shutter speed than 18fps, therefore, their meters should take that into regard. If you are really paranoid though, use and external incident meter. Link to comment Share on other sites More sharing options...
David Leugers Posted August 20, 2006 Share Posted August 20, 2006 If you are using the camera's auto-exposure feature, and your camera exposes film accurately at 18fps, then just load and shoot! If you are setting the aperature manually, then yes, compensate for the higher fps rate. David M. Leugers Link to comment Share on other sites More sharing options...
Matthew Buick Posted August 20, 2006 Share Posted August 20, 2006 What is a Stop ? Link to comment Share on other sites More sharing options...
Premium Member Matthew W. Phillips Posted August 20, 2006 Premium Member Share Posted August 20, 2006 (edited) What is a Stop ? An F-stop is the ratio of the aperture's opening compared to the focal length of the lens. Therefore, a single stop is not a set thing. Furthermore, each stop down halves the light intensity from the previous stop. Therefore, 2 stops has half of the light intensity as one stop. Edited August 20, 2006 by M.W.Phillips Link to comment Share on other sites More sharing options...
Grant Wilkinson Posted August 21, 2006 Share Posted August 21, 2006 matthew, good site for picking up some manuals here: http://www.mondofoto.com/manuals/ it seems to have one for your 6080 Grant Link to comment Share on other sites More sharing options...
Premium Member John Pytlak RIP Posted August 21, 2006 Premium Member Share Posted August 21, 2006 What is a Stop ? A "stop" is the doubling or halving of exposure. It comes from the traditional series of "f/stops" which increment by a doubling of the area of a lens opening, thereby doubling the light coming through the lens: widest opening -- f/0.7, f/1.0, f/1.4, f/2.0, f/2.8, f/4.0, f/5.6, f/8, f/11, f/16, f/22, f/32 -- smallest opening Note that these increment by approximately the square root of two (1.41). The f/stop is a simple ratio of the (focal length)/(effective iris diameter) of the lens. For example a 50mm lens with an iris diameter of 12.5mm is f/4.0. If the iris is opened up to 25 millimeters in diameter, the lens is now f/2.0 and lets in four times the light (two stops), because the area of the lens iris is now four times greater. So a "stop" can refer to the lens opening, or any other parameter (film speed, shutter speed) that affects exposure by a factor of two. One stop equals 0.3 log exposure unit (Log 2 = 0.30) Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now