If size and weight are your primary deciding factors, the Ikelite DS51 II 50W TTL Underwater Strobeis for you. The DS51 II is one of the smallest and lightest strobes in its class, weighing less than one pound per strobe. The compact size makes it simple to position the strobe for macro, super macro, and close focus wide angle. The strobe power/exposure mode switch is prominent on the rear of the strobe with a bright white detail that makes it easy to see where it's pointing. When used in TTL mode together with a compatible TTL converter, your camera will meter the scene and adjust strobe power automatically.

Sync Cord Connection    TTL with Optional Converter    Weighs Less than 1 lb    Made in the USA

Related Questions and Answers

Q: 1. Is this compatible with the Sony A1?

A: The correct model for the Sony A1 is the Ikelite 200DL Underwater Housing for Sony Alpha 1 or a7S III with Dry Lock Port Mount, BH # IKUWHA1A7S3 https://bhpho.to/2VcDRF1

Q: 2. Is the battery compartment isolated from the rest of the electronics?

A: Yes, and it is fully sealed against leakage.

Q: 3. Approximately how many flashes per one battery charge?

A: AA alkaline batteries: Approx. 240 times AA NiMH batteries (1900 mAh): Approx. 330 times

Q: 4. Is it compatible with the Godox AD200 Pro?

A: No, the ULTRAMAX helium underwater strobe housing is designed and made for the AD200 unit.

Q: 5. Will my Canon ST-E3-RT trigger this strobe?

A: No, the Neewer Q4 TTL Flash Strobe supports the Canon system using their camera trigger made for Canon cameras such as the Neewer QPRO-C TTL Wireless Trigger for Canon (B&H # NE66602729).

Q: 6. I have a Neewer Visions5 will this trigger work with that flash or vice versa, will the trigger from the neewer visions 5 work with the Q3 flash?

A: Unfortunately they would not work together. They are on different wireless systems.

Q: 7. Is this dome compatible with the Sony Cybershot RX100 V11? You only have the RX100 V1 listed?

A: Ikelite DC3 6" Dome for Compact Underwater Housings BH #IK6403 is compatible with Sony Cyber-shot DSC-RX100 VII Digital Camera BH #SODSCRX1007 as well.

Q: 8. How bright is that this flash ? Can it be used as a light source as well ?

A: The UFL-3 has a guide number of 22 at ISO 100, It is strictly a flash unit for still images, it has no continuous light for video

Q: 9. how do I add a blue water filter with this port?

A: There really is not a blue water filter for the Ikelite DC3 6" Dome for Sony Cyber-shot RX100 Mark VI Underwater Housings. The workaround is to get Rosco E-Colour+ #779 Pink (21 x 24") Sheet. This gel corrects the blue water color cast perfectly. You will need to cut it and tape it inside the dome. Here is the link: https://bhpho.to/2CTzrXF

Q: 10. How to use these strobes with Lumix cameras?

A: The Neewer Q4 TTL Flash Strobe does not offer a dedicated trigger for Lumix cameras. However, it does have both a radio/RF receiver and an optical receiver built into the unit, meaning this strobe can be triggered by other flashes. You could also manually trigger it with the PocketWizard PlusX 2 Pack on Lumix cameras as long as the camera has a functioning hot shoe.