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Old February 21st, 2004, 05:19 PM   #1
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Depth of Field in Vegas 4

This question is for anyone adept at using at using Vegas 4 (ie Douglas Spotted Eagle, etc). I am using the JVC HD10U hi def prosumer camera. I am able to import the ts stream into Vegas, but the camera does not let me obtain much in terms of the shallow depth of field that you get with film (I also use nd and pro-mist filters with some little success). I was hoping there was a way to get the shallow depth of field in Vegas that I am unable to create with just the use of the camera. Could you please tell me how, if at all, this can be done in Vegas, or point me to a tutorial on the subject in Vegas.

Thanks
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Old February 21st, 2004, 05:54 PM   #2
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You can't really get shallow DOF with Vegas.

You can mask something out and blur or do special effects on the background, but that is EXTREMELY time consuming and Vegas isn't the right tool to do it. It's not really shallow DOF either.

You basically need to shoot with shallow depth of field. There's a depth of field thread somewhere... and an article on it on this site.
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Old February 21st, 2004, 06:19 PM   #3
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depth of field in premiere or vegas

This question is for anyone adept at using at using Premiere or Vegas 4. I am using the JVC HD10U hi def prosumer camera. I am able to import the ts stream into Vegas and Premiere, but the camera does not let me obtain much in terms of the shallow depth of field that you get with film (I also use nd and pro-mist filters with some little success). I was hoping there was a way to get the shallow depth of field in Premiere or Vegas that I am unable to create with just the use of the camera. Could you please tell me how, if at all, this can be done, or point me to a tutorial on the subject in Premiere or Vegas.

Thanks
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Old February 21st, 2004, 07:45 PM   #4
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Generally, the wider the angle of the lens the bigger the depth of field, so conversely, to reduce depth of field, move the camera further away and zoom in.
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Old February 21st, 2004, 09:15 PM   #5
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Depth of Field is a function of the CAMERA, not the NLE. You need to shoot the image appropriately to get the appropriate depth of field. If you try to simulate it in the NLE, you are looking at a LOT of time consuming work and rendering times.
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Old February 22nd, 2004, 10:53 AM   #6
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Also...the size of the camera's CCD(s) has a direct effect on effective depth of field. Larger CCDs achieve a much lower depth of field.
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Old February 22nd, 2004, 09:26 PM   #7
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depth of field (Thanks)

Yeah, I figured as much. I have tried many of the camera options with little luck. I was just hoping in the wind with the Vegas option. I would use the pro35 but WOW the expense. Still I will keep looking for an adapter which gives me the 35mm shallow depth of field option. If there are any other ways to achieve this goal please let me know.
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Old February 23rd, 2004, 10:19 AM   #8
 
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you can fake DOF in vegas by creating a mask on the subject, then applying gaussian blur to the background.

...and WHO says you can't do DOF in Vegas?
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Old February 23rd, 2004, 11:19 AM   #9
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<<<-- Originally posted by Bill Ravens : ...and WHO says you can't do DOF in Vegas? -->>>

It's not a matter of "can't", it's a matter of "practical". As you said, it can be "faked". By why go to all the trouble to fake it when you're much better off taping it that way to begin with. The mask required would be very difficult to get exactly right unless you want to shoot the person in front of a green-screen and then add the blurred background later.
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Old February 24th, 2004, 01:50 PM   #10
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Cheapest Solution - Not for all situations

From the old school bag of tricks...

There is one solution which, although not right for all or even most circumstances, is very effective when used correctly:

The old Vaseline on the matte box technique can be extremely effective uncer the right circumstances such as when the camera and the subject both remain static.

Obviously the matte box should be adjusted so as to minimize the distance from the camera's lens, and there should be an optically pure piece of glass to which the Vaseline (or other suitable substance) is applied.

And it goes without saying that the area of the glass immediately in front of the subject itself should (largely) remain free of any Vaseline.

Try it and let me know.

This does not replace the Mini 35 for use of quality lenses, but my apologies to anyone who bought or built a device strictly for shallow DOF purposes without first considering this technique.

Brian
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Old February 24th, 2004, 01:51 PM   #11
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You could do it in Vegas (like bill said).. but (barring ability to use the camera to do it) AFX or Combustion would be a better idea.. vegas isnt really for compositing.

and, depending on the length of the clip you want to do, it might not be that bad. if it's just for a "Second" camera angle to cut to for a few seconds at a time, it might only take 1-2hrs per second of footage (or less, possibly) to get it right.
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Old February 25th, 2004, 01:30 AM   #12
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Brian, you can kind of achieve that effect by duplicating video onto itself, apply gaussian blur, and by lowering transparency. Vegas already has a filter that does this built-in I believe (called glow I think).

However, I'm curious: When you do it optically, can you move the glass/vaseline such that out of focus areas get more softening than in focus areas?
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Old February 25th, 2004, 04:20 AM   #13
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>"vegas isn't really for compositing."

That's a bit of a broad statement Adam - ok, it can't do as much as After Effects, but Vegas has stacks of fabulous compositing tools - not glitzy 3D stuff, but heaps of things like Displacement, Height or Bump Mapping, Child/Parent Modes, Keys, Masks, easily variable transparency, Track Motion etc etc - in the right hands there's a great deal of compositing can be done without leaving the building.
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Old February 25th, 2004, 09:04 AM   #14
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Vegas isn't really for compositing.

Definitely WAY too broad of a statement. In fact, Vegas is KNOWN for it's compositing abilities! Many people use it for a variety of compositing project over AE because it's faster and easier. So, I'd definitely disagree with that statement.
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Old February 25th, 2004, 09:18 AM   #15
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Ok

Ok, I try both types of compositing and see which gets me better results for the effort made. I will also try a variation of the vaseline technique. I will use think diffusion plastic on clear glass (for static shots) and see where that takes me. I'll report back on my results.
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