View Full Version : Actual DOF for Fixed Scarlet
rodeo
09-28-2009, 08:07 AM
First i am Begineer Filmaker So my apologies for Bothering with simple questions. :embarassed:
first is there any shot with the fixed Scarlet to demonstrate the Depth of Field, or how better is this Depth of Field better than the best prosumer camcorder (e.g Hvx 200) i mean it terms of the depth achieveable :wub:
i know scarlet is superior (2/3 '' & all that):happyhappy: but i dont have the budget for mounts or extra accessories ....so if i have to get to the game i am considering the fixed scarlet as my main camera for all my work until it pays off and i can afford to buy something else then
so any advice i will welcome it :drool5:
Anton Woldhek
09-28-2009, 08:51 AM
deep dof is very easy to achieve, get a lumix tz-7. Its the opposite that is why people like big sensors & fast lenses. go to this http://www.dofmaster.com/dofjs.html
go to 16mm (roughly 2/3" sensor) and put in the specs of the lens.
Pietro Impagliazzo
09-28-2009, 09:33 AM
Better DOF? I don't know how DOF can be bad or good... :P
David Gray
09-28-2009, 10:07 AM
http://www.panavision.co.nz/main/kbase/reference/calcFOVform.asp
Has 2/3 on there. :p It will be way shallower than your HVX anyway.
Here's an example I used in my thesis. To achieve the same Depth of Field (approx.) as a 50mm at f/2 on FF35 you need to use the following f-stops
27 Degree FoV:
FF35 - 50/2 = 25mm f/2
s35 - 38/1.52 = 25mm f/1.5
65mm - 100/4 = 25mm f/4
2/3" - 20/0.8 = 25mm f/0.8
1/3" - 10/0.4 = 25mm f/0.4
Format - Focal Length / Fstop = Size of actual aperture.So here you can see why it's pretty hard for your HVX (1/3") to get the same Depth of Field as an 50mm at f/2.0 on an s35 format. You would need your HVX to stop down to f/0.4!!!
JonFairhurst
09-28-2009, 10:41 AM
I'd recommend that anybody who wants to make films and is waiting for Scarlet to get an SLR and some lenses of some sort. An old all-manual Nikon film camera might be the way to go. Get some cheap Ai lenses (you can re-sell them for the same amount that you pay for them.)
You can get your film developed to CD-ROM. Then you can crop the FF pics to S35, 2/3 or whatever. In the meantime, you'll learn about exposure, DOF and all that good stuff.
The day Scarlet sales are announced, you can sell your Nikon kit without losing a penny. If you get good deals, you might even make a few bucks. Consider it a Scarlet bank account.
I can't recommend that people work on their photo chops enough. There's a reason why the person in charge of the look of a film is called the Director of Photography.
J Davis
09-28-2009, 06:30 PM
http://www.panavision.co.nz/main/kbase/reference/calcFOVform.asp
Has 2/3 on there. :p It will be way shallower than your HVX anyway.
Here's an example I used in my thesis. To achieve the same Depth of Field (approx.) as a 50mm at f/2 on FF35 you need to use the following f-stops
27 Degree FoV:
FF35 - 50/2 = 25mm f/2
s35 - 38/1.52 = 25mm f/1.5
65mm - 100/4 = 25mm f/4
2/3" - 20/0.8 = 25mm f/0.8
1/3" - 10/0.4 = 25mm f/0.4
Format - Focal Length / Fstop = Size of actual aperture.So here you can see why it's pretty hard for your HVX (1/3") to get the same Depth of Field as an 50mm at f/2.0 on an s35 format. You would need your HVX to stop down to f/0.4!!!
That's a great explanation bro ... it's all there in one simple post.
You wouldn't happen to have a quick reference chart that gives you the fov in degrees for APS-c, 4/3rds, DX, and 2/3rds for 16mm, 20mm, 24mm, 35mm, 40mm and 50mm now would you?
(or link would suffice)
It would complement your existing chart perfectly.
David Gray
09-28-2009, 06:59 PM
That's a great explanation bro ... it's all there in one simple post.
You wouldn't happen to have a quick reference chart that gives you the fov in degrees for APS-c, 4/3rds, DX, and 2/3rds for 16mm, 20mm, 24mm, 35mm, 40mm and 50mm now would you?
(or link would suffice)
It would complement your existing chart perfectly.
Thanks. :D
Sadly not I'm thinking about building that tool though. Depends how hard it is. :p I could do it manually for major lenses pretty quickly. And, intend to when I can find my ASC manual. :p I made a thread about it here:
http://scarletuser.com/showthread.php?t=3513
Pietro Impagliazzo
09-29-2009, 12:59 AM
That's a great explanation bro ... it's all there in one simple post.
You wouldn't happen to have a quick reference chart that gives you the fov in degrees for APS-c, 4/3rds, DX, and 2/3rds for 16mm, 20mm, 24mm, 35mm, 40mm and 50mm now would you?
(or link would suffice)
It would complement your existing chart perfectly.
http://www.4shared.com/file/113463881/89755d2e/FOV_Calc.html
J Davis
09-29-2009, 01:37 AM
http://www.4shared.com/file/113463881/89755d2e/FOV_Calc.html
Holy f#&< that's awesome thanks Pietro
Pietro Impagliazzo
09-29-2009, 08:16 AM
I have put together a simple excel spreadsheet for calculating AOV vs focal length for some common formats.
http://www.scarletuser.com/images/style/attach/xls.gif AOVchart.xls (http://www.scarletuser.com/attachment.php?attachmentid=533&stc=1&d=1237421800) (20.0 KB)
Ignore any results over 180 degrees. This is the horizontal AOV. Scarlet 2/3" table is for 2:1, 16:9 would be the same as 2/3"HD. These are approximate values. Just enter the focal length only in the top box.
Thank David Rasberry, he's the one who posted this a long time ago.
All I did was to add 1/4" chip info...
And then I highlighted in red the 2/3" Scarlet and S35 RED One info because I usually make comparisons between those two formats (not the version currently on 4shared, but I'll update later).