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Young-hoo Kwon, Ph.d.
02-28-2000, 08:30 AM
Dear colleagues:

Some time ago I posted a message requesting info on underwater camera
systems. I am grateful to all the individuals who kindly responded to my
request. Enclosed are my original request and the replies. The responses
were properly edited.

I sort of lean to the Sony Lipstick camera (Sony DXCLS1/1) suggested by
Margy Galloway. Is there any US manufacturer of the waterprof housing for
the Sony Lipstick cameras? I would appreciate any additional input on this.

The original request:

I am currently working on an underwater motion analysis project and looking
at the camera options. The camera we have is a waterproof housing system
with waterproof cable. But it does not have a shutter. (I expect this will
cause problems in digitizing blurry images.)

Is there any underwater camera systems available with CCD head inside
waterproof housing w/ zoom, focus, and shutter control? What about the
system w/ gen-lock capability? The waterproof cable must allow me to control
the camera outside the water. I would appreciate your valuable input.

Replies:

1.

You should use the APAS with the new JVC 9800 at 240 hz with water safty
housing.

Gideon Ariel
ariel1@ix.netcom.com

2.

At present we try to do some 3-D reconstruction from underwater movement
registration
We use a mirror setup and one 'home made' housing in which we have a CCD
head with zoom focus and shutter control
you can get an impression of our tools looking at the website

http://apollo.fbw.vu.nl/~htoussaint/B4/indexsw.html
look for the pictures


Huub Toussaint, Ph.D.
Institute for Fundamental and Clinical Human Movement Sciences (IFKB), Vrije
Universiteit
van der Boechorststraat 9, 1081 BT Amsterdam
tel: ++ 31-20-4448498 fax: ++ 31-20-4448529
e-mail: H_M_Toussaint@fbw.vu.nl

3.

Many good video cameras (like the Sony TRV9000) have after-market housings
(like the Stingray) made for them already. Some offer on-housing control,
and
some offer remote control, too (either wires or not). Are you taking
pictures of
divers or animals?

Chuck Pell
cap@ntrobotics.com

4.

I am working also on underwater analysis in Japan. I think a new underwater
camera satisfies your request. The camera was manufactured by the Victor
Corp. and the Yamaha corp. promotes it.

If you are interested in the new camera, please visit the following home
page.
http://www.yamaha-motor.co.jp/pool/parts/20.html
Unfortunately, there is no English explanation about the camera system. So
if you would like to ask in detail, you may contat with Yamaha USA as below,

http://www.yamaha-motor.com/index.htm

Hideki Takagi
Faculty of Education, Mie University
1515 Kamihama, Tsu, Mie, Japan 514-8507
Tel +81-59-231-9294, Fax +81-59-231-9352
http://takagi.edu.mie-u.ac.jp/takagi/welcome.htm

5.

We built a plexiglass box to hold a standard Panasonic camcorder.
The box was lowered into the water at the end of the pool to obtain a
sagittal view of the freestyle flip-turn. The shutter, focus etc was set
before
the box was lowered into the pool. The video was clear enought to digitize
with the Peak System.

Dave Martens, Ph.D.
Exercise Science Dept.
Southern Connecticut State University

6.

Actually here at SFSU we have a graduate student who built his own housings
for
his thesis. He is in the process of writing that procedure out ...it is
much
less expensive than purchasing one...2 housing were built for less than 100
dollars.

the only catch is that there is no cable coming out of the housing... these
housings were built for camcorders and all settings are set prior to
submersion...

Nelson Sierra
nsierra@sfsu.edu

7.

We use a Sony Lipstick camera which has an option for 1/1000 shutter speed,
and have bought the waterproof housing separately from a company here in
Sydney called

Lemac
14-16 Punch St
Artarmon, NSW 2064
61 2 9438-4488 ph
9438-4488 fx

I'm not sure who actually makes the housing.

The camera unfortunately does not have a zoom, but you can get 3 different
size lenses. It cannot be controlled from outside.

Margy Galloway
MGalloway@dsr.nsw.gov.au

8.

When we did an underwater investigation at Washington State University
many years ago, we put the camera on the other side of an underground
window. I don't think that exists at BSU, but you might consider an
installation. The window was immediately below the water surface and about
3 feet wide and 2 feet tall. Communication between the pool level and you
was difficult, but with 2 way radios, I think it can be done. The pictures
obtained were great.

Martha Jack, Ph.D.
E-mail: drmarthajack@att.net
Biomechanical Engineer
P.O. Box 776
Richland, WA 99352
Voice: (509) 943-0043
FAX: (509) 943-4642 ___o
URL: http://home.att.net/~drmarthajack/

9.

Hello. My name is Ji-Hang Lee
I am a Motor Control student in Univ. of Oregon working on Ph.D.
Regarding your Underwater camera request on biomch-L, I thought about those
video housing systems used in SCUBA diving such as ikelite or underwater
kinetics or sea & sea brands. (Just a thought) You may check out those in
your local dive shops. ( I just happenrd to be an diving instructor)

Ji-hang Lee
Motor Control Lab.
Dept. of Exercise & Movement Science
Univ. of Oregon

10.

We are working on an underwater camera at the moment. I got your email from
Dr.Russel Best at VUT in Melbourne, Australia.

Can you explain to me what you what and why you want those features? Also
can you explain what type of shutter control do you want. Also is 25 Hz
frame rate fast enough for you . What to do mean by gen-lock ?

Dave Pope
dave@spa.com.au


Sincerely,

Young-Hoo Kwon
-------------------------------
- Young-Hoo Kwon, Ph.D.
- Biomechanics Lab, PL 202
- Ball State University
- (765) 285-5126
- ykwon@bsu.edu
- http://www.cs.bsu.edu/~ykwon/
-------------------------------

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