I did a small research on the available Underwater housing options for Leica D-Lux 4. I may buyt one in the future for more detailed review. Feel free to share your own experience (if you have one).
1. The first option (and the best option in my opinion) is from 10bar. The price is around US$630, but at this point it can only be purchased from Hong Kong. In Europe this item is available through aditech-uw.com for 589EUR. For more info and pictures click here.
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2.UK-Germany UK-LX3 Underwater Housing. A bit expensive and it seems that it doesn’t have so many controls on the outside surface. Price: 1.198 EUR.
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3. The next underwater housing HC-LD3 is for Leica D-Lux3, but I think it will fit also the D-Lux 4, it seems to be enough space on both sides for the strap rings – check those pictures.
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4. Ewa Marine UW model should work with the Leica D-Lux 4 according to Adorama. A search on Ewa Marine websites shows that model D-SC will be right choice for Leica D-Lux 4 (rated for dives of up to 32 feet/10 meters depth). A little bit confusing. If you have any experience with an underwater housing for the Leica D-Lux 4, I would like to hear about it. Feel free to share some pictures too…