Problem with Inon AD Mount and Fisheye lense

I will try to explain my problem with pictures, any help is appreciated.

I have a Sony MPK-WA housing:

I bought a Inon AD Mount Base for MPK-WA on left, but as you can see the shape doesn't match.

So when I attach the mount base to the housing there's a "gap".

And when I attach the fisheye lens the water will go inside the mount.

Is this the way it's suppose to be? Please help!

I'm not familiar with your camera, but yes, I think so. These are wet mounted lenses, especially the dome lens which fills with water.

Jack

As Jack wrote, the water supposed to get inside, its even good that there is a big gap, My AD mount is so tight that sometime after 10-15 minutes of diving still was an air pocked inside the wet lens that shown in the pictures, I usually take out the lens from the mount in the start of the dive to prevent it.

The AD fisheye is designed for underwater use only. Water needs to enter that area. Without water, the lens won't focus.

Thanks guys, you were right!

How do you like the fisheye lens? Do you have the regular wide angle lens, and if so what are the differences between the two lens? I'm looking to get a lens for my canon a75 with wp-dc30 housing and can only afford one at a time,so I don't want a duplicate lens if they do the same thing.

How do you like the fisheye lens? Do you have the regular wide angle lens, and if so what are the differences between the two lens? I'm looking to get a lens for my canon a75 with wp-dc30 housing and can only afford one at a time,so I don't want a duplicate lens if they do the same thing.

<{POST_SNAPBACK}>

I don't have wide angle lens but the fisheye lens is awesome, definitely recommended. I did a quick test in teh bathtub and you can clearly see the difference.

Without:

With:

Thanks for getting back so quick.Do you have a strobe or just shooting with built in flash?Big difference in photos.Definitly leaning toward fisheye.

I have another question:

Is it possible to avoid the "dark corner"?

My feeling is that shouldn't happen with a setup made for that specific camera but it does occur occasionally. The only way I've found to get rid of them is to zoom ever so slightly.

PS...your bathtub needs cleaning