Anyone using them underwater for sunbursts and or over under shots?Also anyone using a tripod to do 2 exposures one for the water and one for the foreground and than combining them in PS.
I was pretty good at getting nice blue water and sunbursts with slides but am finding that with digital it is way more complicted. With slides for a sun burst I would wind up with 90 sec at f 16 or 22. With digital I am winding up with shutter speeds in the 300-600 range and than it still looks funky (the reef goes black and the forground is harder to lite as the shutter speed is cutting the length of the flash. I would love to see some digital sunbursts you all like and learn how you all did it
Thanks
joeyfishes
Berkley White from Backscatter has used Grad ND filters underwater. He offered a setup where you could mount one on your fisheye lens and spin it using the zoom gear on your housing. Pretty cool. You can see some samples on the Backscatter page.
I thought about making one for a while to help w/ the sunbursts but never followed through w/ it.
The reason that the exposure is different than film is that the digital sensor has a linear response to light. Film has a non-linear response curve, so the highlights don't burn in as much as they "should."
James
Berkley White from Backscatter has used Grad ND filters underwater. He offered a setup where you could mount one on your fisheye lens and spin it using the zoom gear on your housing. Pretty cool. You can see some samples on the Backscatter page.
I thought about making one for a while to help w/ the sunbursts but never followed through w/ it.
The reason that the exposure is different than film is that the digital sensor has a linear response to light. Film has a non-linear response curve, so the highlights don't burn in as much as they "should."
James
Thanks James .wondering if you could explain the linear vs non-linear to a technically impaired person
Thanks
Joe
Berkley White from Backscatter has used Grad ND filters underwater. He offered a setup where you could mount one on your fisheye lens and spin it using the zoom gear on your housing. Pretty cool. You can see some samples on the Backscatter page.
hi james
can you give me a link to this setup? i did not fint it at backscatter but would very much like to have a peek at it...
There's even some conversation between James and myself about advantages/disadvantages of the gradient placement. James said he was going to give this a try with his 1DS... did we ever see the results of your experiments James?
I spoke to backscatter and they are gonna make me one for my Ike housing. I will keep you all posted on how it works out
joeyfishes
I spoke to backscatter and they are gonna make me one for my Ike housing. I will keep you all posted on how it works out
joeyfishes
What lens & port are you planning to use? Its will be interested me also with my Ike setup
What lens & port are you planning to use? Its will be interested me also with my Ike setup
I am gonna use a sigma 15mm fisheye and an 8" Aquatica/Ikelite port. They need the camera port and lens and focus gear to build the gizmo. I will keep you all posted on how it turns out. Ease of use etc
Joe
Keep us posted Joe - sounds interesting.
Keep us posted Joe - sounds interesting.
Will do. I am gonna send it all in as soon as I get my dome back from Jean at Aquatica (in for a repaire)
camera manufacturers could implement some sort of "grad filter emulation" into their designs, meaning parts of the sensor switch to a gradated lower light sensitivity. I imagine that we could save a few custom emulations, and each can be rotated. That would allow us to do "normal" shots, together with sunburts, on the same dive!
Any news on your dome Joe?
Got sidetracked. But am gonna send it in next week
