flamebouyant

Hi everyone, I'm hoping some of you might be able to help me out. I recently upgraded to a 5D mkiii Nauticam system. I'm shooting with the Canon EF 17-40 1:4 L USM Lens, 50mm extension ring, and a Nauticam N120 8.5" acrylic dome port, as is the suggested setup, but every image has severe vignetting, regardless of the focal length. At first I thought it might just be because I was shooting primarily at the wide end, but after experimenting I realised that it doesnt matter. The wierd thing is that when I first used it i was shooting split shots in mangroves and there was no issues. But while diving and snorkelling, all images have vignetting. This is the first time I have used a rectilinear lens underwater, having only ever used the Tokina 10-17mm previously, so I'm pretty confused. Is it just the lens? Could it be my Autofocus settings? Could it be that the second hand dome has been polished too much so that now it has thicker edges thus creating the blur? I'm really at a loss here, and after investing so much money to upgrade, I'm really disappointed. So I would really appreciate some feedback guys!!! Thanks in advance.

Hi everyone. Still looking for this housing. Would really like to hear from you!!

How much are you asking for? Can you post some images?

If anyone out there is looking to offload a Nauticam housing for the canon 5Diii or 5Div, please get in touch. Cheers in advance!!

Hi all. Hope your all doing well and had a great weekend diving. I'm searching for a Nauticam 20mm extension ring with lock. Part #21120. I have recently purchased a 8.5" dome port and now I need the ring. If anyone has one ease get in touch. I'm based in Australia. Thanks in advance everyone.

Hi Todd. Where are you based?? I'm interested in the zen dome. I'm assuming its nauticam mount right?

Love it!! Great footage.

Hi @nickga69 just wondering if you still have the 8.5" port available?

Will do Chris.

Do you mind me asking how much you paid roughly?? I just googled this place, but i couldnt find any prices.... Regards, Uri.

Will do. Theres a good chance i will be there around April next year...

Thanks so much for your detailed response Chris. As it turns out it was a simple problem where my camera flash was set to E-TTL and once I changed it to Manual the problem was resolved. Sadly I didnt realise this while i was in Martinique diving recently. Allthough I was pretty sure that I had tried this. In any case, there is no problem with my strobes or camera, so this is great news. Maybe we should go for a dive and take some photos next time im in sydney town??... Cheers chris.

Thank you so much Pavel. You nailed it. I changed to manual flash, reduced the output to 1/64 and voila!!! perfect. Full power bursts while using any apperture or shutter speed settings. Every day is a school day!! Thanks so much.

Thanks for the reply. I have always set the flash to its lowest output setting for use with my strobes, but it would seem that I had it set on E-TTL. Hopefully this is why I was having the issues.

One other question, once you have set your flash mode to manual, what do you set the flash output at?? i have options for 1/1 1/2 1/4 1/8 1/16 1/32 1/64 1/128...........