Wet Lens Basics?

[KeithG]

I've only tried to flood mine in the sink and it doesn't quite work. There are little air bubbles that come out very slowly but even after a minute it hasn't flooded.

After I screw the lens on while submerged, if I take the lens out of the water, the water between the port and lens stays in place until I unscrew it. Not sure if I'm doing something wrong. Do I just need to take it deeper so the ambient pressure will force the water in?

Getting water in and getting water out are 2 different problems.

You really only need to worry about getting water in. A sink is not deep enough to provide any real world feedback. I suggest 2 different solutions:
- detach and re-attach the lens once under water (this sucks big time, but should work fine). A quick shake of the camera and lens should detach any small air bubbles.
- depending on the design, you may be able to quickly swish your camera back and forth once underwater. This worked with my Sea & Sea DX1G wide angle lens to get rid of trapped bubbles.

 

[johnohuk]

Dive down a few feet, unscrew lense just enough so that it's loose but not coming off. Jiggle it around and watch the air bubbles as the water enters. Screw/Unscrew the lense a little, roll the camera around a bit. Look in the port/lense to check whether there is a bubble or not, sometimes air gets stuck in a corner. You can do it on entering the water or at depth but you need some pressure. If you don't do this, you'll either see a blur at the extremities of the image or a line across your images..

 

[VsubT]

1. Backscatter, Bluewater, et al sell those lenses. Ask them?
2. Send a query to Dyron?
3. There is a Dyron subforum on SB. Post query there?

Here is the manual for their 24mm lens. Probably similar.
http://web.archive.org/web/20081113115204/http://www.dyron.fr/pdf/DY.67WA24.COLOR.ENdoc.pdf

PS- you can get a bayonet/quickmount adapter for the lens and your camera. Well worth it rather than trying to screw it in, unscrew it all the time u/w.

Maybe I'm reading this wrong, but asking an expert vendor for help after going cheap and picking up the lens on eBay seems like a chump move.

I agree with the bayonet adapter as a good option. If the OP picked one up from a vendor mentioned above, they'd probably be a lot of help in making sure he got the right parts.

Lance

 

[herman]

A little off topic but a couple of relevant tips.
You need some place to store the lens if you intend to remove it under water (I often carry 2 macros and a wide angle- all Inon 67mm threaded ones) ,swapping between them during the dive. I have a base attached to my tray that I can screw the lens on to. You could use a BC pocket but I don't really like the idea and find them hard to get things in and out of.

When you change lenses, find a good flat, sandy spot to get over before you start to install/remove the lens...when and it is not if but when you drop a lens, it does not drop into a deep crack in the reef or off into very deep water.