Just Posted: Pentax WG-3 GPS Review

seilerbird666:

I used my Nikonos under water some, and don’t remember having to grease the O ring every time. Yes it was something indicated by Nikon, but not an every roll of film or lens change thing.

Many water tight flashlights use O rings. Now I’ve not used them under the water, but there many are rated for diving, in particular the ones sold under the name Princeton Tec in the USA.

It would be better if the makers of these small tough cameras worked out a better sealing system. That includes making the bodies a bit thicker to allow for say 25 mm screw down ports–that size allows for an SD card and a reworked battery. Then the somewhat deeper body would allow for greater internal zoom systems.

“Pro housings” are big and costly. And very complicated to keep sealed. Nor do you then get a camera you can easily fit in a bag or big pocket. Even the Nikonos, with lens, could fit in a big cargo pocket.

Source Article from http://www.dpreview.com/news/2013/07/19/just-posted-pentax-wg-3-review