|
|||||||||
![]() |
|
Thread Tools | Search this Thread |
![]() |
#1 |
Regular Crew
Join Date: May 2008
Location: Canary Islands
Posts: 54
|
What´s better? Optical Filters pre or post proccesing?
Hi all,
I have this dude, I know polarizing filters do a great job, but I like to explain something. I recorded a leopard in zoo protected by a heavy methacrylate glass and the transparency and contrast was really terrible due to adverse ligth. I thought that was a lost file. Anyway, at home I play a litlle with that file in Sony Vegas Video, using curves, profiles, contrast, etc. and the final result was pretty good, usable and now the file is in a family video. Filmed with my HV 30, not a perfect focus, but enough to see the effect. So, if you use a polarizer, what is easier?, reducing contrast and saturation got with the optical filter or raising up leves by software? What do you prefer? Thanks
__________________
Canon XH A1; Canon HV30; Nikon D300; Nikon D200; Sony Vegas Pro http://www.juanparmenides.com |
![]() |
![]() |
![]() |
#2 |
Contributor
Join Date: Jan 2003
Location: Kansas City, MO
Posts: 4,449
|
I would use a polarizer if you have one.
|
![]() |
![]() |
![]() |
#3 |
Regular Crew
Join Date: May 2008
Location: Canary Islands
Posts: 54
|
Thanks, Bill. By the way, I have one Kenko pro polarizer 72mm from my photography gear, circular polarizer.
But I am asking the following, does the light rays go the same way to one CCD/CMOS captor from a DSLR camera that to three independent CCD , R, G, B? A bit confused this way. Thanks again.
__________________
Canon XH A1; Canon HV30; Nikon D300; Nikon D200; Sony Vegas Pro http://www.juanparmenides.com |
![]() |
![]() |
![]() |
#4 |
Trustee
Join Date: Jan 2008
Location: North Conway, NH
Posts: 1,745
|
The answer appears to be no, based upon what I know. There's anecdotal evidence insofar as you need to use a circular polarizer with a DSLR and you can use a linear polarizer on the A1.
Rather than a bunch of us giving you dribs and drabs about the differences between the two, you'd probably be better served by checking out these links. Digital single-lens reflex camera - Wikipedia 3 CCD Structure - Wikipedia To answer your original question, it's generally best to get it right through the lens and then use tools in post to refine the image. |
![]() |
![]() |
![]() |
#5 |
Contributor
Join Date: Jan 2003
Location: Kansas City, MO
Posts: 4,449
|
You can use the circular polarizer with a video camera. It's just that there's no advantage over a linear one.
|
![]() |
![]() |
![]() |
#6 |
Regular Crew
Join Date: May 2008
Location: Canary Islands
Posts: 54
|
Thanks to all. I have made a little test with the Kenko polarizer attached to the Canon XH A1 and everything seems to be ok.
Cheers
__________________
Canon XH A1; Canon HV30; Nikon D300; Nikon D200; Sony Vegas Pro http://www.juanparmenides.com |
![]() |
![]() |
![]() |
| ||||||
|
|