DoF with 8x fixed lens

[TraceyLee]

Hey everyone! This may very well be one of my first posts. It's great to be here.

So does anyone know what kind of DoF we can expect with the Scarlet fixed 8x lens? How shallow can we get it to go? I am not a fan of super shallow stuff, I was just hoping that it could be somewhat shallow for a decent film look.

 

[Juhan Malmstein]

Firstly, there's a thread made about the scarlet's dof very day, why not try out the awesome search function(unless you really really aren't naive enough to think you were the first to ask the question) to see what has been said about the topic in the past. other forum members aren't here to use the search function for you.

Secondly, the "film look" doesn't have anything to do with depth of field or what the images were captured with, but everything to do with the directing, acting, lighting and set design.

http://reduser.net/forum/showthread.php?t=37849

 

[TraceyLee]

No Juhan, I am not naive enough to think that this question has not been asked before, in fact, I have already read every page of that thread. I also already understand what complexities go into making the film look but I am specifically asking what the new 8x lens will be capable of.

 

[Juhan Malmstein]

if you've read that thread, and other, then you should already know that the dof the 2/3" sensor produces is (about!!) ~2 f-stops "deeper" than larger sensors(s35 and ff35) would produce. So considering that the fixed 8x lens will be t2.4 then take any aps-c or ff35 sensor digital stills camera and imagine that the most shallow you can open up the lens is to about f5.6 at any focal length.


edit: found a much better worded explanation of it in the nov 30'th feedback thread.

http://reduser.net/forum/showpost.php?p=517588&postcount=427

 

[David Mullen ASC]

You can use the magnification factor as a rough guide to the f-stop compensation you need to make to match DOF once you've matched FOV and distance to subject.

If 2/3" is 9.58mm horizontal and Super-35 is 24mm horizontal, that's a 2.5X magnification factor to deal with when matching focal lengths (for example, a 20mm lens on a 2/3" camera gives you the same FOV as a 50mm lens on a Super-35 camera). FF35 is 36mm wide, which is a 3.75X difference with 2/3" more or less.

That means roughly that a 75mm lens on a FF35 camera gives you same FOV as a 50mm lens on a S35 camera and a 20mm lens on a 2/3" camera.

So if the zoom on the fixed-lens Scarlet is set to roughly f/2.8, then that would be like shooting S35 at an f/5.8-8.0 split.

 

[TraceyLee]

Thanks for the responses guys. That's about right for what I want. Wow, now to save my pennies.