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KatheK

Member Since 16 Sep 2011
Offline Last Active Oct 20 2011 03:21 AM
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Posts I've Made

In Topic: Fish Books

23 September 2011 - 08:37 PM

Hi
Do anybody can suggest some book what describe fish behavior?


There is a set of three books for identification of fish, coral and critters in the Caribbean by Humann and DeLoach. They also have one on fish behavior.

In Topic: Dark band in photos

20 September 2011 - 05:29 AM

I have a wet lens with my old P&S camera.
If you look at your lens, you will see that it has holes to let the water in, be sure that the holes are not obstructed in some way.

If the wet lens is working correctly, you shouldn't need to do anything special in order to get the air out while you are underwater.
It could be a manufacture problem.


Acuevas, thanks for the suggestion. I will check it out.

In Topic: Dark band in photos

19 September 2011 - 03:40 PM

Thanks for the welcome...lots of reading to do...and I am looking forward to taking a class at some point if I can find a good one. I live near Cozumel and Cancun so it shouldn't be too hard.

In Topic: Dark band in photos

19 September 2011 - 04:05 AM

Is that a 'wet lens'? e.g. it's a Wide angle that doesn't form part of the sealed housing, but is added externally (and can be added when in the water)? If so, it kind of looks like it was partially filled with water and partially with air in the second photo, hence you have the line between the two with a different focal length on one and the other side of the border.

With wet lenses I thought you wanted the 'interface' between them and the actual housing port face *completely* flooded with water. The lens structure may have a sealed air cavity, but the gap between add-on lens and housing port face needs to be consistent. Maybe that's what Martin meant, and it's just a matter of context (he meant make sure the *air* drains from between the two??) It'll probably work if there's still all air inside the gap, you just don't get quite the same field of view, but it definitely can't work with a 'mix' of air and water.

I confess I have the book (on Kindle) and haven't hardly read it yet. :/


Yes, it is a wet lens and I had also just about decided that the word 'air' should be substituted for 'water'. It would not surprise me if that were true as my Kindle version of the book is loaded with typos and misspellings.

The next time I dive I will make sure to put the lens on under the water after getting rid of all the air bubbles. Thank you for your help.

In Topic: Dark band in photos

18 September 2011 - 05:00 PM

Here is a link to two photos...the first one was taken within 2 or 3 minutes of getting to the bottom and is one of the few decent photos and the other was taken later. I could not figure out how to put the photos into this discussion. Thank you for offering to help.

Picasa Album