PhilPowers Posted October 31, 2004 Share Posted October 31, 2004 Hi guys, please help. I am currently working with some film style canon digibeta lenses i.e. no servos etc. I am after some depth of field charts for these lenses does anyone know where I can download them? Im in a bit of a hurry. I need charts for Canonj15, Canonj20, Canonj8 or is it j9 any help with this would be fab. :huh: Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted November 1, 2004 Premium Member Share Posted November 1, 2004 Hi, The Canon J-series are usually ENG zoom lenses. Are you sure you haven't just got ENG zooms without the servo grip? In any case, the depth of field will be identical for any lens of a given focal length, circle of confusion, and stop. Phil Link to comment Share on other sites More sharing options...
Dudu Stoz Posted November 1, 2004 Share Posted November 1, 2004 the circle of confusion for standart definition video is more or less 21 micron so just use DoF calculator or the DoF formulas like you do in film Link to comment Share on other sites More sharing options...
PhilPowers Posted November 3, 2004 Author Share Posted November 3, 2004 thanks, they are film style canon zooms so that you can have ARRI follow focus with a longer throw and more linear focus. Anyway my question is not what kind of lenses do i have i would like to know where i can obtain depth of field charts for them. if anyone knows kindly point me in the direction, thanks p Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted November 3, 2004 Premium Member Share Posted November 3, 2004 Hi, You don't understand. Depth of field will be the same for any and all lenses at the same focal length and F-stop. You don't need specific charts for each lens. Phil Link to comment Share on other sites More sharing options...
PhilPowers Posted November 4, 2004 Author Share Posted November 4, 2004 Yeah thanks, I wasnt reading your reply correctly ( i was in a bit of a hurry and just stuck in traffic). So tell me based on your 21 micron circle of conf. In the space that says resolution ???? lines/mm what would i type? Sorry my maths is poor. Cheers guys.. :> Link to comment Share on other sites More sharing options...
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