UW photo is there a tip ? at DVinfo.net
DV Info Net

Go Back   DV Info Net > Special Interest Areas > Under Water, Over Land

Under Water, Over Land
Tools & Techniques for Nature, Outdoors, Wildlife & Underwater Videography.

Reply
 
Thread Tools Search this Thread
Old September 19th, 2009, 04:04 AM   #1
Regular Crew
 
Join Date: Apr 2007
Location: France
Posts: 152
UW photo is there a tip ?

Hi

Is there tips to take photography in two different medium Air/Water with water level as middle horizontal line ? in my experiments the line is blur.

Best regards

Gilles
__________________
Gilles Debord
http://www.wwvideo.tv
Gilles Debord is offline   Reply With Quote
Old September 19th, 2009, 04:30 AM   #2
Trustee
 
Join Date: Feb 2005
Location: Worldwide
Posts: 1,589
The central section line will always be out of focus, but you can film so that both above and below the water line is sharp in the same shot.
With stills photography I mainly use Nikon Nikonos underwater cameras such as my Nikonos RS with 50mm UW lens that provides sharp photos both above and below the water line. This lens can also be matched to Canon XL2 and Canon XL-H1 for filming video using my Nikkor XL adapter (by Les Bosher).

Split filming will also work if you place the video camera inside a underwater housing with a flat glass front port and use the normal DV lens, although a domed port will also work. You must take into consideration that the section of the lens underwater will focus on the magnified subject (things always seem closer/larger underwater) while the section of the lens above water will focus normally - so turn off the AF and focus manually until you get both above and below subjects in focus.
If you use a lens like the 16X or 20X it will change lens view underwater, so the widest setting of a 35mm equivalent lens above water will be about 50mm underwater - so try to use the widest lenses you've got, such as a 3X lens or with wide adapter such 0.7X or 0.5x in front of the main lens.

Another good ploy is to use a small glass aquarium partially submerged so it sits on the bottom of the lake/river and then film from inside of the aquarium with the lens hood tight against the inside of the glass. This produces amazing above & underwater footage and the added advantage is that when you slide the DV camera above and below the waterline there is no water droplets on the front lens element/housing port, so all you see in the footage is a very clean transition between air and water.
__________________
www.WILDCARP.com
www.NIKON.me.uk
Tony Davies-Patrick is offline   Reply With Quote
Old September 21st, 2009, 03:47 AM   #3
Regular Crew
 
Join Date: Apr 2007
Location: France
Posts: 152
Hi

Thank's a lot Tony i try it.


Gilles
__________________
Gilles Debord
http://www.wwvideo.tv
Gilles Debord is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

B&H Photo Video
(866) 521-7381
New York, NY USA

Scan Computers Int. Ltd.
+44 0871-472-4747
Bolton, Lancashire UK


DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Special Interest Areas > Under Water, Over Land

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



All times are GMT -6. The time now is 06:17 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network