Strobes proper positioning?

[Plotek]

Hi

I have a problem with proper positioning of my strobes. At the both sides of the image i have brighter are with bacsccater. I used Inon UWL 100 with Dome unit and 2xS-2000.
Can You give me any advise what I should change?

 

[cardog]

Hi

I have a problem with proper positioning of my strobes. At the both sides of the image i have brighter are with bacsccater. I used Inon UWL 100 with Dome unit and 2xS-2000.
Can You give me any advise what I should change?

View attachment 108308

You need to position your strobes further out to the edges and maybe point the strobe heads out a bit.

 

[bvanant]

Get a copy of Martin Edge's book (the underwater photographer). He has lots of diagrams of where you should put your strobes. In your case, they are too far forward and need to move back (away from the front of the dome) a bit.
Bill

 

[Wisnu]

Get a copy of Martin Edge's book (the underwater photographer). He has lots of diagrams of where you should put your strobes. In your case, they are too far forward and need to move back (away from the front of the dome) a bit.
Bill

love this book, probably the most comprehensive UWP book

 

[beautybelow]

Are you using your diffusers?

It looks to me like you are "hugging" with your strobes. Or trying to wrap them around your subject so to speak.

The little rock on the very left edge has a shadow cast inwards so maybe your strobes aren't "flat in line with your housing". In other words, turn your housing sideways and look straight down from one strobe to the next and they should be inline and level with your lens.

Also, it looks like you may be using full power. Which can make the light even harder to control.

 

[Plotek]

Many thanks for all tips, I will try it next time.

Yes, I am using diffusers, and strobes at full power.

 

[mjh]

As others have said you want your strobes out, maybe pointed "out" a little and pulled back. Hope this photo helps. In less than gin clear water you need to closer to your subject and lower the power on the strobes.

untitled-shoot-025 - ScubaBoard Gallery

 

[Plotek]

As others have said you want your strobes out, maybe pointed "out" a little and pulled back. Hope this photo helps. In less than gin clear water you need to closer to your subject and lower the power on the strobes.

untitled-shoot-025 - ScubaBoard Gallery

Thanks for this image, it helps a lot. Now I see what it means to pull back and out. I already have lamps quite wide but in plane with dome.
I read that in water with poor visibility and a lot of particles it is better to remove diffuser to avoid backscatter. It will give smaller angle and more straight light which is easier to control. What do You think about that?

 

[cardog]

Thanks for this image, it helps a lot. Now I see what it means to pull back and out. I already have lamps quite wide but in plane with dome.
I read that in water with poor visibility and a lot of particles it is better to remove diffuser to avoid backscatter. It will give smaller angle and more straight light which is easier to control. What do You think about that?

Speaking as I guy that only shoots in crappy viz I would have to disagree.

 

[Ardy]

Looking at your test photo it strikes me that the flash on the right with more backscatter is aimed more towards the centre of the photo and the one on the left seems OK. There is a clear edge in the middle of the shot where the coverage is falling off. If one flash is brighter than the other (you can check by photo in dark against mirror or white wall) then use that one as your master and the other as a slave. Also looks like you have not used a diffuser on your flashes as the centre on the right is burning out detail.

However I think the flashes are just not lined up the same. Agree with all above re Martin Edge photo book, it is a must have but DO NOT buy it as an ebook, like I did, the loss of colour photo's and page links is too great.