shokwaav

I understand that on paper the A7Rv and MF1 can shoot up to 1/250. However, the photos are showing the effect of what happens when you go above flash sync speed. As to why this combination is not hitting 1/250... I postulate that its due to a combination of the flash and trigger. The banding seen in HSS is different from the banding seen in these photos. They appear like this: https://www.dpreview.com/forums/thread/4324303

You've reached max flash sync speed. https://digital-photography-school.com/understand-flash-sync-speed-so-you-dont-sink-your-photo-shoot/ It may be a combination of strobe and trigger that can't support sync speeds higher than 1/200.

30 60 90 120 Also from the other forum.

Not sure if I'm allowed to link to another forum, but Backscatter provided more details regarding their setup here: https://scubaboard.com/community/threads/backscatter-hybrid-flash-hf-01-preliminary-review.645397/post-10293597 Copied for posterity.

They mention that they do standardise some stuff, namely measuring the actual guide number with a light meter with their specified settings and distance here: https://youtu.be/-g_vCijzNdA?t=837 However, just looking at their photos, it's clear that some settings regarding the Ikelite photos are different from the other photos just by looking at the sides of the swimming pool. I think comparing the f stops between the edges and the centre can be compared within the same image (assuming no post processing was performed), but comparing the brightness between different images will be difficult unless Backscatter can provide the standardised settings.

The Backscatter HF-1 has a snoot LED mode, but looking at the LEDs, they're slightly offset from the flash. I think they might be slightly angled inwards. From the manual:

I've got a Backscatter HF-1 on order, but their snoot isn't available yet until later this year. I planned on designing and 3d printing one. The simplest design seems to be a funnel style snoot, but are there disadvantages to this design? Also what type of material would you print it out of? PETG seems to be the favourite, but would something more matte like CF-PETG or Nylon be a better choice?

Did you manage to see any Mandarin fish?

Did you do any diving at Pemuteran then? I'm planning on going in July with Abyss as well, and they recommended us diving at Pemuteran for half the dives, but I'd rather do more of Menjangan if its much better.

Amateur underwater photographer here. Used to use a RX100 V in Nauticam Housing with 2x Z240 Strobes. Decided to upgrade to the A7C2 this year with 28-60/WWL-1B combo and 90mm macro combo!