TTL-Converter for Sony A7 in NAUTICAM housing

High-spec underwater strobe with large light output The YS-D3 DUO by Sea&Sea is a high-specification underwater strobe with three shooting modes: DS-TTL, RC mode, and manual. The YS-D3 DUO delivers even and uniform light distribution with a large light output of GN33. Custom settings allow the strobe to be used with high precision with a variety of cameras and shooting styles. Shooting Mode The mode switch can be used to switch between "DS-TTL", "RC mode", and "Manual". It is conveniently identifiable by color. Blue: DS-TTL Red: RC mode Orange: Manual 1 Highly accurate DS-TTL dimming DS-TTL dimming accuracy has been greatly improved by adopting a newly designed light receiving sensor. By applying detailed custom settings, it can be used with high accuracy with a wide variety of cameras of multiple brands. *When shooting TTL with a camera of a brand other than OM SYSTEM (OLYMPUS), select DS-TTL as the shooting mode. *Pre-custom settings must be made for each camera in advance when shooting with DS-TTL. In DS-TTL mode. Exposure compensation can be made with the light level control dial on the right. +2.0 to -2.0 Highly accurate DS-TTL dimming The "RC System" is a flash system for OM SYSTEM digital cameras, and the YS-D3 DUO was developed in collaboration with OM Digital Solutions to incorporate the RC mode. RC mode is a light control mode in which the camera automatically controls the flash output based on the brightness through the lens. The YS-D3 DUO is equipped with a more precise "RC mode" that was developed based on system information officially provided by OM Digital Solutions. The YS-D3 DUO is equipped with a more precise "RC mode" developed based on the system information officially provided by OM Digital Solutions. *Since the strobe is system-linked to the camera, flash output compensation can be adjusted not only on the strobe side but also on the camera side while shooting in RC mode. *Setting the camera to RC mode can prolong (save) the camera's battery life. In RC mode. The light level control dial on the right can be used for exposure compensation. Manual mode has 11 steps In manual mode, light intensity can be adjusted in 11 steps. The settings are (GN: 1 / 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 33). The value can be easily seen on the scale on the light intensity adjustment dial. Compatible with digital cameras that do not have a pre-flash function. *Only manual flash is available, but if your camera housing is equipped with a strobe connector/converter connector, you can also use a sync cord to connect the strobe. In manual mode. Select the guide number with the light level control dial. YS-D3 DOU can also be connected with a sync cord Customize The YS-D3 DUO can be set up with high precision to accommodate a variety of shooting styles with different cameras by making custom settings. Refer to the table for settings according to the shooting mode used and the method of synchronizing the camera and strobe. Shooting in DS-TTL mode and manual mode ・ Click here to shoot with DS-TTLusing an optical/TTL converter. *Custom settings are not required when using manual trigger. Use the default settings. ・When shooting in DS-TTL/Manual using the built-in flash. Nikon  Canon  Sony Others *See page E-28 of the instruction manual for procedures to change custom settings. Shooting in RC mode When shooting in RC mode with an OM SYSTEMS (OLYMPUS) camera, no custom settings are required. Select "RC mode shooting" in the flash mode setting on the camera side; YS-D3 DUO should be set to "RC" for shooting mode. *For details on "RC mode shooting," please refer to the user's manual of the camera to be used. Light source This is a high-performance strobe that pursues quality of light, and its high luminous flux and wide beam angle are effective for wide-angle photography with fish-eye lenses and other wide-angle lenses. The strobe also features our proprietary light distribution technology. High light intensity GN33 The light output has a guide number (GN) of 33, one of the highest among general-purpose underwater strobes. The use of two discharge tubes increases power and achieves GN 33 at full flashing. Two discharge tubes Uniform and even light distribution The originally developed "aspherical toroidal lens" is placed in front of the light-emitting tube, and the two discharge tubes and the "aspherical toroidal lens" provide uniform and even light distribution to the periphery, making it an ideal light source for external Illumination. Aspherical optical troidal lens Adjust beam angle with diffuser The beam angle is 80°×105° without the diffuser and 100°×110° with the included diffuser for soft lighting. When the optional dome diffuser is attached, the beam angle increases to 150°×170°. The dome diffuser is effective when using a fisheye lens or when lighting with soft light (guide number is reduced by approximately -1.5 EV). Without diffuser With attached diffuser (optional) Dome diffuser installed Operability Sea&Seas particular emphasis on ease of use, especially underwater handling. The more you use it, the more you will appreciate its easy-to-turn dial, easy-to-see panel display, and good underwater balance. Large dial Underwater operation is performed with the mode switch and light intensity control dial. The large dials are non-slip and the height difference allows smooth operation even when wearing thick gloves. It is designed to stop in steps with a click-click to minimize malfunctions. Large dial Easy-to-read backlit panel The indicator color changes each time the mode switch is repositioned. Blue (in DS-TTLII mode), red (in RC mode), yellow (in manual mode with pre-flash), and green (in manual mode without pre-flash) are the different colors for identification, so positioning of the controls is easy to see even when night diving. In DS-TTLII mode In RC mode In manual non pre-flash mode Underwater Balance YS-D3 DUO by Sea&Sea has almost zero buoyancy with the ball mount and clamp in place. Heavy underwater weight requires unexpected force to operate the clamp, but the YS-D3 DUO is unaffected by buoyancy, so operation is smooth. Even if you change the strobe position, the underwater balance of the entire housing set does not change significantly and you can feel how easy it is to handle. Two patterns of target lights The LED target light function is useful for focusing and checking the beam angle of the strobe. Choose either 300 lumens or 150 lumens depending on the situation. 300 lumen 150 lumen One-touch battery replacement The power source is AA batteries, which are widely distributed in general. Four of the same type (1.5V alkaline AA batteries and 1.2V nickel-hydrogen AA batteries). The battery box is opened and closed by a bayonet type that does not put a burden on the O-ring. It is a one-touch operation and does not require force like the screw-in type. Hook for Fiber Optics A hook for fiber-optic cable on the strobe body smartly guides the fiber-optic cable. How to connect with the arm of your choice A straight type ball base is included, but the YS base or Strobe Ball Base 35 can be attached as an option depending on the application. (optional) YS base (optional) Diagonal ball base Accessories A wide variety of accessories expand the shooting range. Snoot An adapter that turns a strobe light into a spot light. An internal prism allows the optical axis of the target light to be perfectly aligned with the optical axis of the strobe light. The beam aperture is 25mm and the use of a snoot cuts off light around the subject to make only the subject stand out. Dome diffuser Diffuser that widens the beam angle to 150° x 170°. Light intensity is reduced by approximately -1.5 EV (GN28). Flash prism Light guiding prism that can emit YS-D3 DUO light without using a fiber-optic cable; supports RC mode and manual Emission.

The Pro Max has the highest power output of the new Retra Flash Series, a fresh OLED back panel display and offers the highest level of versatility that is appreciated by all underwater photographers. Engineered to Perfection For over a decade, a group of engineers and underwater photographers have teamed up with a single goal in mind: develop a true lighting tool for underwater photography. To reach this goal, we continuously examined feedback from photographers during every step of the development process. The end result is a travel friendly strobe that delivers top-tier performance in any lighting condition. So, whether you're a professional or just diving into the world of underwater photography, the Retra Flash will be your trusted companion on all your underwater adventures. 4th Generation of Underwater Strobe Technology With our 4th generation series, we listened to all your comments and made changes to the Retra Flash to better suit your needs. Electronics were completely redesigned with efficiency and performance in mind 4th Gen. Retra Flash uses less power for the same light output Optical triggering system is more reliable and able to read optical input even from sub-optimal fiber optic cables. Intuitive Back Panel Controls We've spent hundreds of hours analyzing feedback from photographers on the field and tweaking our designs to bring you a back panel you are immediately familiar with. We're also introducing a brand new innovation that is the centerpiece of the new Retra Flash Pro Max. The OLED display shows relevant information based on selected mode. The information is uncluttered and clearly displayed - even in sunny shallow waters! Information that can be seen on the display: Current mode Power setting Battery life indicator Capacitor recycle indicator And more! A reliable power source is the key Our 4th generation Retra Flash models have a completely redesigned battery compartment that can now hold 8x AA cells without the need for a separate battery compartment, when using the Booster. The Retra Flash is also the only underwater strobe with a built-in leakage detection system that warns you if water gets into the battery compartment. 

Ultra Wide, High Power, Compact Underwater Strobe Achieved an increades GN22 with the same compact size as the previous model (INON S-2000). A high-perfomance fly-eye dome to dramatically increase beam angle underwater. Large wheel dial for operability, easy to see phosphorescent panel. Double O-Rings greatly reduce the risk of flooding. Compact body yet delivers GN22 Equipped with a fly-eye dome lens enabling super wide underwater beam angle of horizontal 140°×vertical 100° Reliable and proven "S-TTL Auto" and 12-step "Manual Flash Large wheel dial for dramatically improved operability. A phosphorescent panel for easy readability Double O-rings greatly reduce the risk of flooding Front positioned base contributes more flexible lighting Operates on four AA batteries, readily available and reasonably priced Compatible with various strobe dome filters Supports "Quick Holder" for easy one-touch attachment/detachment Compact yet Powerful GN22 Despite of compact body, the S-220 spreads high-power GN22. The full-scale performance coupled with a wide underwater beam angle provides unparalleled performance as a main strobe in all areas, regardless of whether for wide-angle or macro photography or compact digital camera or SLR camera. Super Wide Beam of 140° Horizontal x 100° Vertical Underwater Created by Fly-eye Dome Lens A precisely calculated and uniquely designed fly-eye dome lens for the light-emitting part attains extraordinary underwater beam angles of 140° horizontally × 100° vertically with minimal light distribution Variation. This wide beam angle perfectly fills the "UWL-95S XD" + "Dome Lens Unit III" underwater coverage of horizontal 140° x vertical 100° (at 4:3 aspect ratio), enabling a single S-220 strobe to illuminate the entire image. Reliable "S-TTL Auto" and 12-step "Manual Flash" Equipped with reliable and proven INON original high-precision automatic "S-TTL Auto" flash control system and 12 step "Manual Flash" function with -0.5EV. increment. The S-TTL Auto system can be used not only with camera's built-in flash but also with INON original TTL converter equipped with INON housings, "X-2 R6 Mark II","X-2 R6" and "X-2 R5" for even more precise TTL system. You will never miss a shutter chance. Large Wheel Dial for Greatly Improved Controllability and Phosphorescent Control Panel Improves Readability Redesigned large control wheel and switches significantly improve operability. In addition, the rear control panel is white-based highly illuminant phosphorescent material, ensuring easy-to-read usability both during day and night diving. Double O-rings Significantly Reduce Flooding Risk Ball adapters such as the "Z Adapter MV" and "Direct Base Ⅲ" is located forward close to the light-emitting surface, instead of rearward in the previous models not let an optical cable to interfere lighting flexibility. Operates on 4 Readily Avaiable, Inexpensive AA Batteries Various Dome Filters The S-220 strobe is equipped with a bayonet mount to use various dome filters.Packaged dome filters are "Strobe Dome Filter S [SOFT]" which increases strobe beam angle to horizontal 150° x vertical 110° while reducing light intensity by -0.5EV. and "Strobe Dome Filter [ND]" which reduces light intensity by -4EV. specifically for macro imaging.In addition, two optional strobe color filters are available: Strobe Dome Filter S [4900K] and Strobe Dome Filter S [4600K], which warms native strobe color temperature 5500K to either 4900K or 4600K.