Re: PHOTO-3D digest 1903

[P3D Ronald J Beck <rbeck@xxxxxxxxxxxxxxxxxx>]

Elliot,
Don't forget about the following RE: underwater photography...

        1. The water filters out the colors as you go deeper
           following the ROY G BIV color order.  Reds are pretty
           much gone by 10-12 ft.  By 30 ft, you're pretty much
           left with blues.

        2. The above info also occurs with the light from your strobe.
           Your strobe has to travel (in your example below) three 
           feet to get to your subject and then another three feet 
           to get back.  At a six feet distance total, you're already
           starting to lose some of the reds.

        3. All of this info is rather mute if you have "stuff" in 
           suspension in the water (dirt, mud, fish droppings, etc...).

How did the housing perform?  How deep were you able to go?  

Regards,
Ron

photo-3d@xxxxxxxxxxxxxxx, Elliot said:
> Just received the first roll of underwater lenticulars taken with a 
> 3D-1000 in the plastic underwater housing. Only 4 of the roll were 
> printed because of the underexposed negatives. The light falls off 
> very quickly in Puget Sound. Also, the point of focus changes 
> radically. Sharp focus looks to be about 3 feet. Fortunately 
> background isn't a problem, because it goes to pitch dark at 6 or 7 
> feet-- the little built in flash doesn't have a lot of omph. So, for 
> the next experiment, I'll go to a much higher ASA (the test was shot 
> with 100). Once the film/distance combination gets figured out, it 
> should perform good enough to get some interesting photos. Of the 
> lot, the best was a full head close up of one of the divers (with no 
> plus diopter lenses-- that was taken care of by the water) that is 
> very sharp, but a little on the dark side...

> Elliott 



------------------------------

End of PHOTO-3D Digest 1905
***************************
***************************
 Trouble? Send e-mail to 
 wier@xxxxxxxxxxxxxxx 
 To unsubscribe select one of the following,
 place it in the BODY of a message and send it to:
 listserv@xxxxxxxxxxxxxxx 
   unsubscribe photo-3d
   unsubscribe sell-3d
   unsubscribe mc68hc11
   unsubscribe overland-trails
   unsubscribe icom
 ***************************