Posted 15 January 2013 - 04:18 PM
I was curious if there are any other factors that may be leading to this issue that I haven't thought of? Obviously everything in the dome is black in color so there isn't any white paint that could be causing them. I've attached a sample to illustrate the type of reflection I'm seeing. I also notice this type of reflection when aiming the camera into the sun. Obviously it's something to do with light reflecting from an outside source.
I've only used a Nikon 16-35mm f/4 lens on the camera with the dome so that could be a partial cause/effect of the reflections. I have a UV filter on the front as well.
In the meantime, one quick-fix I could do is shoot in DX mode which would effectively crop most of the reflection out...but of course I did not buy the D800E to shoot it in crop mode. :-)
Thanks for your help!
Posted 15 January 2013 - 04:37 PM
Posted 15 January 2013 - 04:38 PM
The light comes in and reflects off the front of the lens, which then bounces off the inside of the dome and back into the sensor, showing up in my pictures.
Some people take thin velvet type fabric and put it on anything on the lense that's not part of the glass optics, but I also don't like bright lights blowing out the image so I just train models to shine their light to the side, and it gets rid of it most of the time.
Posted 15 January 2013 - 04:50 PM
I'll be at Our World Underwater in Chicago next month so I planned to ask Ryan Canyon from Reef Photo about the issue. Maybe he can point me in some new direction for alleviating these.
Posted 16 January 2013 - 08:46 AM
I have seen many people paint the shiny portions of their lenses with matte black paint to help alleviate this, especially lenses with shiny silver or gold rings on them. Since it's just a UV filter on the front, what do you have to lose by painting it matte so it doesn't reflect?
Notice how in each of these images you are shooting into relatively strong sunlight? When enough light hits your lens through the dome, it reflects onto the inside of the dome. So if you can, avoid pointing your housed camera directly into strong light sources that you know will cause this reflection.
- tdpriest likes this
Posted 17 January 2013 - 12:47 PM
Posted 17 January 2013 - 05:41 PM
Hope it helps! Moray Eel is just my current rating, my forum handle is blaisedouros which provides a huge degree of anonymity given that it's nothing like my name. Swear
Ha! Wow, can't believe I fell for that. Lol. Every forum is different on where usernames are shown and this one totally fooled me! By my ideology I would be titled "Hermit Crab" as well!
Posted 18 January 2013 - 07:26 AM
This is a common problem when shooting into the sun at relative shallow depths. I think the first to post here on the solution was Stephen Frink a few years ago. A black sharpie can be helpful and people have tried flat black paint which can work. A good optically coated dome helps to reduce the reflections. Stephen posted a solution back in 08 using black flocked paper available from Edmund Scientific but they no longer show it as available. His article for Seacam on his solution is here. I’ve used black gaffers tape from Shurtape (CP-743) on the front of the lens which I think helps.
If anyone has found a replacement for the black paper I'm sure they'll jump in.
Canon 5D Mk III, 7D & 40D, 60mm, 100mm, 17-40L, Tokina 10-17, Nauticam 7D, Sea & Sea MDX-40D YS-250's ULCS arms, Lightroom
Posted 22 January 2013 - 01:17 PM
Posted 23 January 2013 - 01:24 PM
Posted 31 January 2013 - 03:25 PM
Many of the Nikon lenses have a decorative gold ring and gold lettering on the lens barrel which seems to reflect the light and caused me the same sort of problem.
I used a piece of black elastic which I stitched into a loop which fits around the lens barrel and covers the gold ring and lettering and seemed to solve the problem. It's cheap, easily available, doesn't mark the lens, stays in place inside the housing and can be easily changed between lenses.
Hope this helps.
Posted 01 February 2013 - 01:03 PM
Edited by Stewart L. Sy, 01 February 2013 - 01:09 PM.
SLS Photography, when your images matter....
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Posted 02 February 2013 - 07:50 AM
I buy my own photographic kit. Diving equipment manufacturers and diving services suppliers get even-handed treatment from me whether they choose to advertise in the publications I write for or not. All the equipment I get on loan is returned as soon as it is finished with. Did you know you can now get Diver Mag as an iPad/Android app?
Posted 02 February 2013 - 07:26 PM
Also tagged with one or more of these keywords: Internal, reflections, flash
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