ewa-marine U-B100 underwater camera housing for dSLR
Sketch ewa-marine U-B100

ewa-marine U-B100

Underwater housing for professional dSLR cameras

order code: U-B100

The U-B100 SLR underwater housing can be used on small boats, in the surf, while swimming, snorkeling or diving. It`s easy to operate the camera as its various components and buttons can be operated through the PVC.

The U-B100 is designed to fit almost all common, professional SLR cameras on the market today, irrespective of the manufacturer or model. It is designed primarilyfor the use with larger diameter lenses with a 77mm or 82mm filter thread.
With this housing, a whole new world of applications opens up for your standard SLR camera: Inside the housing you can now take the camera safely canoeing, snorkeling or even diving, up to a depth of 20 m / 60 ft.

The housing will accept all lenses with a filter thread of 82mm or less. It comes, out of the box, with an adapter for 82mm filter thread and a step-up ring RA77-82 for 77mm filter thread. Depending on the lens, you should be able to use the housing with focal lengths of around 18mm to 19mm for a full-frame sensor camera. Using wider angle will result in vignetting, i.e. the corners of the picture getting dark an, if going even wider, the picture being taken "trough a tunnel". Naturally, this effect does not apply for cameras with a smaller sensor like APS-C, were vignetting would only start at more extreme wide angle settings and with lenses that do not have a filter thread and can therefore not be used in the housing.

If the optional BF1 lead weight is inserted into the housing, underneath the camera, it becomes even easier to reach the maximum depth. Experienced photographers have confirmed, that the auto focus and flash both continue to function perfectly. As you descend, the air is pressed into the camera. Due to this, the pressure inside the housing will remain the same as the surrounding water pressure. (this is the reason why ewa-marine housings are so safe to use: implosions are impossible) Due to this, we have to start the dive with a suitable amount of air inside the housing. The foam pads supplied with the housing are part of this air "reservoir" to ensure that the maximum potential volume is being utilized.

This is only one of a range of underwater SLR housings by ewa-marime.

Click, if you need help to find the right housing for your camera, lens and application.

The U-B100 is a practical, "all-round" housing that is primarily intended the be used while swimming, snorkeling and other, general water sports. While it can also be used for scuba diving, for lack of a strong, external strobe, and because the camera's small, built in flash is to close to the lens, resulting in small, suspended particles in the water showing as  "snowflakes" in the picture, i.e. can not be used in most applications, the U-B100 is limited to 20m / 60ft. A depth where you also can still take pictures with ambient, natural light. Since underwater photography generally requires the use of wide angle or macro lenses and thus shorter lenses, the lens tubes on the housing is kept rather short.

Depending on your application but the following products offer a better solution:

  • U-B: For camera lens combinations where the lens has a filter thread of 67mm or smaller
  • U BXP: SLR with top mounted strobe and up to to 50m / 150ft dive depth. Primarily for for scuba diving.
  • U BXP100: Similar as the U-BXP but with camera lens combinations where the lens diameter is too large for the standard unit. i.e. filter thread 72mm, 77mm or 82mm
  • U-BZ100: For outdoor photography while canoeing or kayaking with long zoom lenses

Designed specifically for professional, digital dSLR cameras, the ewa-marine U-B100 underwater housing is manufactured from our special, double laminated PVC and has an integrated, optically neutral flat glass as a front port. With this housing you will receive an 82mm filter adapter and a step-up adapter RA77-82. By means of these adapters the camera is then docked into the housings front port (which is bigger on this housing then on the standard U-B), ensuring that the lens remains parallel and centered behind the front of the lens. Just as if it were a clear, neutral optical filter.

To fix the right hand near the shutter release, the housing has an adjustable wrist strap and a "Finger" to position the index finger right on the trigger.

It has a pair of non-corrosive and seawater resistant clamping rails which fit together for perfect sealing.They tighten by means of three screw knobs. There is also the practical, adjustable carry strap on the clamping rail.

It is supplied in a handy yellow storage and carrying case.

Width 170 mm
Height 165 mm
Length inkl. lens 185 mm
Diameter Frontglass 95 mm
Max. Filter thread diameter lens 77/ 82 mm
Weight 470 g

Actually, it's not in a box at all. We sell this unit in a handy, yellow, nylon carry bag. This bag is ideal to store and transport your ewa-marine housing, it also helps reduce unnecessary packaging-waste and as such is part of our amain to help the environment.

In Addition to your housing and closing rail you will get the following with your new ewa-marine:

  • CA-82 Adapter *
  • step-up adapter RA77-82 *
  • sachet of Camera-Dry silica-gel
  • foam padding (can be removed to accommodate battery grip or weights) 

*until September 2017 this housing only included the CA77 adapter

Should you require a lost or broken part, please contact us via mail:

  • 306/3 closing rail
  • set of 3 knurled nuts for closing rail
  • foam padding U-B..-Series
  • SF100 front port replacement (has to be replaced in factory)
  • puncture repair (has to be repaired in factory)
  • yellow nylon bag

EOS 1Ds, EOS 1Ds Mk II, EOS 1Ds Mk III
EOS 5D, EOS 5D Mk II, EOS 5D Mk III, EOS 5D Mk IV, EOS 5Ds / 5Ds R
EOS 10D, EOS 20D, EOS 20Da, EOS 30D, EOS 40D, EOS 50D
EOS 60D, EOS 60Da, EOS 70D, EOS 77D, EOS 80D, EOS 90D
EOS D30, EOS D60

D1, D1H, D2H, D2Hs, D2X, D2Xs,
D3, D3X, D2S, D4, D4S, D5, D6
D70, D70s, D80, D90
D100, D200, D300, D300S, D500, D600, D610
D700, D750, D780, D800, D810, D850
D7000, D7100, D7200, D7500
D5000, D5100, D5200, D5300, D5500, D5600
D60, D40X, D50
Df, F5
Z6, Z7, Z50

FinePix IS Pro
Fujifilm FinePix S1 Pro, Fujifilm FinePix S2 Pro
Fujifilm FinePix S3 Pro, Fujifilm FinePix S5 Pro
Finepix DS560, Finepix DS565
Fujifilm X-S1
Fujifilm GFX 50S, 50R

Hasselblad HV

Konika / Minolta
Dynax 7D

E-1, E-3, E-30, E-5

Panasonic Lumix
S1, S1R

*istD, KP
K-1, K-1 Mark II
K-30, K-5, K-5 II, K-5 IIs
K-50, K-500, K-7, K30, K70


SD1. SD9, SD10, SD 14, SD15

Sony  α / Alpha
A 290, A33, A35, A390
A450, A500, A55, A550, A580
A700, A850, A900, SLT-A99


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All data and pictures of underwater housings and rain capes on this site show the current state and design at the time when this page was last edited. ewa-marine can change and improve the design of individual products at any time during the manufacturing process. For this reason products currently available on the market may differ in some details from the pictures shown on these pages. ewa-marine reserves the right not to be responsible for the topicality, correctness, completeness or quality of the information provided. Liability claims regarding damage caused by the use of any information provided, including any kind of information which is incomplete or incorrect, will therefore be rejected.
Some pictures shown on this website show the ewa-marine product including camera or other electronic equipment. These cameras or other electronics are not included with the product.