Changing Focal Length

untitled101

untitled101

Member
How do I change the focal point of a shot with the dvx100b? righ now i can only make everything clear or blurry, how do i choose what i want to be in focus? example, have something like a flower blurry in front of the actor, have the actor clear, and have the backround out of focus.

also what kits are recommended for purchasing offline or in a store, that include an extra battery, a camera case, and innexpensive lights for lighting up a room?
 
zoom in all the way, that's all you gotta do

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or use a camera with a larger sensor

...or get a 35mm adapter
 
Opening the iris as much as possible also helps with the effect. You may have to kick in some ND for this.
 
What you're talking about is Shallow Depth of Field, and its a bit elusive in video. Others here have mentioned a few ways to try and achieve this effect with current equipment:

- open iris, use ND filter + full telephoto zoom will give you a shallower depth of field so that you can choose what you want to focus on
- a 35mm adaptor such as the redrockmicro M2 is the best you can do to achieve this effect on standard prosumer cameras without having to go to the measures described above
- If you have the cash, the RED ONE camera (forums at reduser.net) shoots like a true 35mm camera with its larger sensors and achieves shallow depth of field.

Check redrockmicro's website for a good tutorial/explanation of how all that works.
 
can someone briefly tell me how to run the ND, and what it stands for and how to choose between telephto and normal mode.
 
ND stands for neutral density (forgive my spelling). what the hell it means I dont know, but ND filters are thing you put in front of the lens to let less light in.

the dvx has 2 ND filters built in. Simply click it up and an over exposed image becomes properly exposed... well, kinda, you know what i mean.


as for telephoto and normal "mode", I have know idea what ur talking about. if you want to be at "full telephoto" ("telephoto mode" I suppose you could call it), you just zooom in as much as possible
 
Neutral = Color Neutral, that is, filters equally for all three sensors

and

Density = Optical density, that is, the degree to which a medium absorbs light traveling through it

so

Neutral Density filters cut down light transmission without affecting the light's color.

Unless they're warm or cool ND filters, in which case they will.
 
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Example of the Zoom-to-blur-the-background shallow DOF effect: http://www.changedcrocodile.com/Films/Backyard/Backyard.html

Just a stock DVX-100A, zoomed and NDed as necessary (I don't recall if I needed them or not...but if I did, I used them. :) )

Umm....obviously, just the bugs and flowers show shallow DOF. The butterfly is especially nice, I think. You can stop watching after that. No need to sit through the whole 6 minutes.
 
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