reduce depth of field on Canon HV20

[Brian Boyko]

Any way to reduce depth of field on the Canon HV20 without breaking the bank? (I.e., getting a 35mm adapter and 35mm lens?)

[Eugenia Loli-Queru]

You just need to zoom-in all the time to your subject. About 80% when using the normal lens and about 30-50% when using an ND filter in front of it. There's no other way to get background blur on most shots with these consumer cameras without modifications/adapters/etc. Also, using manual focus in some situations might help. That's it.

[Glyn Williams]

Originally Posted by Brian Boyko

Any way to reduce depth of field on the Canon HV20 without breaking the bank? (I.e., getting a 35mm adapter and 35mm lens?)

Not tried this but.....

You'll get the shallowest depth of field if the aperture is fully open.
In a brightly lit scene, I guess adding some neutral density filters could allow this to happen.

Of course you don't want to lose so much light that the electronic gain kicks in.

[Eki Halkka]

Originally Posted by Glyn Williams

Not tried this but.....

You'll get the shallowest depth of field if the aperture is fully open.
In a brightly lit scene, I guess adding some neutral density filters could allow this to happen. .

I prefer polarizing filters - you get a variable ND that way:

http://hv20.com/showthread.php?t=1132

[Robert Ducon]

It's all abot zoom and 'enlarging out of focus areas'.

If you have a subject, make sure the background is 10 feet or so behind them, then you take the HV20 and make sure you're 10-15 feet away from the subject. Then zoom in and focus on the subject.

Ta da. The HV20's sensor is large enough that if you use this technique, you'll be able to yield great results!

[Robert Ducon]

The question was how to make that 'DOF' effect. Answer remains: open aperture, and/or zoom and focus maually if you need to make the effect the most apparent.

[Dennis Khaye]

Green screen the actors in a very quiet place, then go shoot your background out of focus. This also does beautiful things for your audio. There's also a plug in for After Effects that claims it can do this for you. I'm just assuming it's a mask technique.

[Ian G. Thompson]

Originally Posted by Dennis Khaye

Green screen the actors in a very quiet place, then go shoot your background out of focus. This also does beautiful things for your audio. There's also a plug in for After Effects that claims it can do this for you. I'm just assuming it's a mask technique.

You know...I've actually thought about doing this. My question is....does big budget movies do this also? I know they would have the cams that can do this naturally...but I wonder if some are using this method.

[Michael Jouravlev]

Originally Posted by Ian G. Thompson

You know...I've actually thought about doing this. My question is....does big budget movies do this also? I know they would have the cams that can do this naturally...but I wonder if some are using this method.

"300" is shot fully greenscreen in a studio... well, in an empty hangar, except one scene with horseback riding. Then about year and a half in post.

[Euisung Lee]

The camera I want is the one captures scene with deepest dof and 'somehow' generates greyscale depthmap so that I can add custom and precise dof in the post ;-)

[Dennis Khaye]

Yes 300. Less than recently, Sin City.

There's a romantic sunset balcony scene in Heat where Di Nero is talking with a woman, LA sunset in the background. I'm almost sure normal productions are never scheduled to include a green screen shot. Maybe a second unit "oops we missed this" or a prod co's funding cuts might make some of these types of things necessary but I don't think anyone starts out thinking this is a good idea.

[Pieter Jongerius]

...on the green screen "solution": blurring is NOT the same as having low DOF. It's so synthetic!
A calculated gaussian or other blur delivers a totally different light scatter than a lense. The HV20 proves this in a peculiar way by delivering a weird blur effect I have never seen before in a cam: I would call it square blur. Bright objects that are out of focus blur like this:

<>

Not round, but a 45degrees rotated square (actually, a little bit squashed). Maybe you can even see it on Wes' shots in this thread (thanks Wes)

To tell you the truth: once I started to notice this HV20 square blur, I diminished my low DOF shots. It looks somewhat artificial...

Pieter

[Gene Brockhoff]

I've been looking for a plug-in that would simulate bokeh after some rotoscoping. I know SDOF is not desirable in all situations, but I have one interview with a famous author, in front of a bookcase. Everyone wants to see what books he has! Maybe my After Effects wizard can figure this one out. Pieter, I know what you mean by the <> blur of the HV-20.

[Steve Brady]

Originally Posted by Pieter Jongerius

To tell you the truth: once I started to notice this HV20 square blur, I diminished my low DOF shots. It looks somewhat artificial...

Pieter

It's the shape of the camcorder's iris. Lock your aperture fully open at the widest zoom setting, and you'll get a nice circle.

[Robert Ducon]

Originally Posted by Steve Brady

It's the shape of the camcorder's iris. Lock your aperture fully open at the widest zoom setting, and you'll get a nice circle.

Even then Steve, Pieter is right. The fully open Iris on the HV20 is still shaped like a diamond - it only consists of four-blades. So Pieter, that's the best you'll get! And, it's not bad, really.

This principle applies for any camera.. in the right situations, you can 'see' the shape of the Iris in the bokeh.

And Dennis, right on: the question was HOW to get the DOF look without the cost, not the merits of DOF. So, again, wide open with the iris, and if you're in the right situation, zoom and focus on subject (with foreground and background out of focus).