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That’s correct, from focus distance and farther away is the useful range that produces a uniform light spread. The working distance can produce a dark spot in the center and reduce the light output, especially with masks with smaller diameters.

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7 hours ago, Oskar@RetraUWT said:

That’s correct, from focus distance and farther away is the useful range that produces a uniform light spread. The working distance can produce a dark spot in the center and reduce the light output, especially with masks with smaller diameters.

Thanks a lot for the quick reply, Oskar.

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On 6/17/2022 at 9:45 AM, TimG said:

Hi Redwing

I've just done a 7-day  liveaboard in the Caribbean with 2x Retra Pro-Xs both fitted with Superchargers.

We did 4 dives a day evenly spaced during daylight hours. I tended to use a wide-angle lens and Retras with diffusers for the 2x morning dives; then 2x macro dives in the afternoon usually with one Retra with a snoot and one with Retra macro rings. Probably around 250-300 images each day. Superchargers were always fitted.

In general the 8-batteries needed for each Retra/Supercharger were enough for one day. There were one or two days when, if I expected I would use a snoot heavily, I would change one strobe battery set for, say the 4th dive. I find using the snoot makes quite a difference on battery life as I often have that strobe on maximum power especially if using the smaller mask openings. 

I had 2x4 AA chargers (EBL type) plugged into a USB charger with me and 32 batteries. In practice I never had a problem running out of charged batteries. I had thought about getting an extra x8 charger but really didn't need it.

Just returned from a Red Sea live aboard.  Using two 2x4AA LaCrosse battery chargers set to a charging current of 500mA was plenty for 3-4 divers per day shooting WA exclusively.  I had a fresh set of 16 batteries by mid day.  

It took me several dives to lock in the correct strobe position for my fisheye lens.  Overall I'm really pleased with this upgrade.  I did find that using the supercharger as a handle to reposition the strobes had a tendency to loosen the ball mount.  Have since added a lock washer which I think should remedy this issue.

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29 minutes ago, Redwing said:

Using two 2x4AA LaCrosse battery chargers set to a charging current of 500mA was plenty for 3-4 divers per day shooting WA exclusively.

I found the pretty much same thing during a liveboard trip back in May. With a bit of juggling, 2x 4-battery chargers was enough and helped a bit with weight/volume reduction for the flight baggage allowance.

 

30 minutes ago, Redwing said:

I did find that using the supercharger as a handle to reposition the strobes had a tendency to loosen the ball mount.

I've not had that problem. Oskar told me some time back that the ball mounts can be really tightened using the provided Allen key and it won't damage the mounting. I do find the Supercharger really useful as a handle especially with the LSD snoot.

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Diffuser question and battery charger update.

 

1. First, I will be taking a dive trip in January to a location where the water can be a bit greenish.  This is a first for me.  Wondering if there is a benefit to using the Retra diffusers in such a situation, or if it is better to leave the green or deal with it in post?  If taking a diffuser, is it worth adding the new  soft diffuser (if anyone knows yet) in place of the wide angle diffuser I already own?

2. I see there have been some discussions of chargers.  A few months back I added superchargers and thus had to ramp up my charger abilities.  I purchased and took an XTAR BC8 charger, available from Amazon and it worked well.  This is a small-sized charger only marginally larger and no heavier than the 4-cell chargers I already had.  It charges fairly fast and never seemed to get overly warm (which is bad for batteries).  They are not expensive chargers but seem to have a good "intelligent" charging program.

I have  added another for an upcoming trip.  That will allow me to charge all 16 cells daily, and I also like having more than one charger in case of a failure.  These things never seem particularly robust to me, so the idea of a backup is appealing.  Hope this helps someone.

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17 hours ago, Draq said:

Diffuser question and battery charger update.

 

1. First, I will be taking a dive trip in January to a location where the water can be a bit greenish.  This is a first for me.  Wondering if there is a benefit to using the Retra diffusers in such a situation, or if it is better to leave the green or deal with it in post?  If taking a diffuser, is it worth adding the new  soft diffuser (if anyone knows yet) in place of the wide angle diffuser I already own?

2. I see there have been some discussions of chargers.  A few months back I added superchargers and thus had to ramp up my charger abilities.  I purchased and took an XTAR BC8 charger, available from Amazon and it worked well.  This is a small-sized charger only marginally larger and no heavier than the 4-cell chargers I already had.  It charges fairly fast and never seemed to get overly warm (which is bad for batteries).  They are not expensive chargers but seem to have a good "intelligent" charging program.

I have  added another for an upcoming trip.  That will allow me to charge all 16 cells daily, and I also like having more than one charger in case of a failure.  These things never seem particularly robust to me, so the idea of a backup is appealing.  Hope this helps someone.

I was out diving the Yukon in San Diego yesterday playing with my Retra ProX and had the wide angle diffuser. The water was very green (normal for the area) and had a TON of particulate matter in the water. Quite frankly, I'm a bit surprised at how the photos turned out given the conditions. Visibility was probably 6m / 20 feet.

The photos below have had a few adjustments in LR but nothing major and I haven't cleaned up any backscatter. I'm not planning to use them for anything other than I was just testing the strobes in those conditions.

Regards,

- brett

yukon1.jpg

yukon2.jpg

yukon3.jpg

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PS - Yes, I know it is an American flag on a Canadian destroyer. Don't ask me... :)

 

- brett

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Thanks, looks good.  Would be interesting to compare to a shot without the diffuser...

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3 hours ago, Draq said:

Thanks, looks good.  Would be interesting to compare to a shot without the diffuser...

Thanks. I have to make a small correction. I was getting my kit ready for a dive tomorrow and checked the diffuser and it is the "White Diffuser" and NOT the "Wide Angle Diffuser."

- brett

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Question about HSS

I am shooting with Sony A7R4 and using Retro Pro X. I can't make the HSS work. I just updated the flashes using the app, but it still doesn't work.

I am using the Nauticam flash trigger. 

Do I need a different flash  trigger, or am I missing something in settings.

Anyone knows?

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8 minutes ago, Steen Nissen said:

I am using the Nauticam flash trigger. 

Do I need a different flash  trigger, or am I missing something in settings. 

The Nauticam trigger does not support HSS. You need a UW-Technics trigger or TRT Electronics s-TURTLE.

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I use the UW-Technics trigger with Retra Pros for HSS. It works a treat.

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