Edited by johnspierce, 19 June 2012 - 10:34 AM.
Back Inflation or Jacket style BCD
#1
Posted 19 June 2012 - 10:30 AM
#2
Posted 19 June 2012 - 10:51 AM
(IF I were buying TODAY though.....oppposite vote)
Current rig: Sony SLT-alpha55 in Ikelite housing, Sigma 17-70mm f/2.8-4.5 DC Macro in 6" 5503.80 dome (+2 diopter optional), Sigma 8-16mm f/4.5-5.6 DC HSM behind UWCamStuff custom 5" mini-dome. Dual INON z240 Type IVs. Homebuilt LED/fiberoptic triggering.
#3
Posted 19 June 2012 - 11:30 AM
· INON Z-240s & Sea & Sea YS-250 Pros
· SmallHD DP4 monitor & NA-DP4. Fisheye Aquavolt 3500s & 7000s
· Zen DP-100, DP-200 & DP-230
#4
Posted 19 June 2012 - 11:31 AM
With a back inflation BCD you get your face splashed with each wave in 3 feet of chop since you are unable to get you head high out of the water. The back inflation tends to pitch you forward where the jacket will not.
#5
Posted 19 June 2012 - 11:54 AM
You just need to add some ballast to your butt!I have changed from a back inflation to a jacket BCD after doing the Galapagos some years ago.
With a back inflation BCD you get your face splashed with each wave in 3 feet of chop since you are unable to get you head high out of the water. The back inflation tends to pitch you forward where the jacket will not.
Bob
Edited by Deep6, 19 June 2012 - 11:54 AM.
Carpe carp - Seize the carp
#6
Posted 19 June 2012 - 01:42 PM
Cheers,
Jim.
D90 in Nexus; 60mm, Woody's Diopter, 105mm, SubSee +5 & +10 magnifiers, 10-17mm, Kenko 1.4 TC, 18-55mm & Inon Z240 strobes.
#7
Posted 19 June 2012 - 02:13 PM
-Gina
#8
Posted 20 June 2012 - 03:56 AM
Public Safety Diver
#9
Posted 20 June 2012 - 07:51 AM
I can stay vertical in the surface with my face out of the water without moving my fins, it's all about the balance.
And you cannot have better trim underwater.
Andres Cuevas
Nikon D7000, Tokina 10-17, Aquatica AD7000, Aquatica Mini Dome, 2xInon Z-240 type 4.
flickr
#10
Posted 20 June 2012 - 10:44 AM
You just need to add some ballast to your butt!
Is that the same as losing some bioprene?
Tim
#11
Posted 20 June 2012 - 10:46 AM
...you cannot have better trim underwater.
True, but perfect trim isn't neccessarily the best posture for photography, especially if you are using a straight viewfinder.
Tim
#12
Posted 20 June 2012 - 11:17 AM
True, but perfect trim isn't neccessarily the best posture for photography, especially if you are using a straight viewfinder.
Tim
True, I still don't have a 45 degree viewfinder.
Andres Cuevas
Nikon D7000, Tokina 10-17, Aquatica AD7000, Aquatica Mini Dome, 2xInon Z-240 type 4.
flickr
#13
Posted 20 June 2012 - 11:29 AM
I can stay vertical in the surface with my face out of the water without moving my fins, it's all about the balance.
But can you get your head high enough out of the water in 3 foot chop so you do not get a face full of water with each wave and not be pitched forward?
#14
Posted 20 June 2012 - 01:39 PM
But can you get your head high enough out of the water in 3 foot chop so you do not get a face full of water with each wave and not be pitched forward?
In the Great Lakes we deal with bigger waves than that while wearing wings. Generally when I'm on the surface I'm naturally leaning back so that I can use my fins more effectively and prevent water intake. If your back-inflated wing is pitching you forward that means you have way too much air in the wing.
#15
Posted 20 June 2012 - 01:41 PM
But can you get your head high enough out of the water in 3 foot chop so you do not get a face full of water with each wave and not be pitched forward?
Absolutely, is all about using the correct size of wing according to the amount of weight you are carrying.
And about not be pitched forward, is all in you body position. I've used different sizes of tanks, alu and steel, single and doubles. The trick is stop moving the fins and the hands and find the correct position to have a good valance.
And after some time, you never feel any unbalance while in the surface.
Andres Cuevas
Nikon D7000, Tokina 10-17, Aquatica AD7000, Aquatica Mini Dome, 2xInon Z-240 type 4.
flickr
#16
Posted 20 June 2012 - 02:17 PM
#17
Posted 20 June 2012 - 02:35 PM
Steve
www.lafcpug.org
Steve Douglas
www.worldfilmsandtravel.com
I have worked as an unpaid reviewer for the editing websites since 2002. Most all hardware and software is sent to me free of charge, however, in no way am I obligated to provide either positive or negative evaluations. Any suggestions I make regarding products are a result of my own, completely, personal opinions and experiences with said products.
#18
Posted 20 June 2012 - 08:21 PM
Oh yeah, I have some of that bioprene forward on the other side.Is that the same as losing some bioprene?
Tim
I ditched the ole Oceanic last year when it became unreliable. I added weight pockets on the back tank strap for trim balance. My new back BC has them built in. I use 2:1 or 3:2 ratio lower weight to upper back trim. Over inflating on the surface can pitch you forward. Just relax and be still. I don't have a 45 deg. finder either. When properly trimed, up or down head movements can make gentle changes in position.
Bob
Carpe carp - Seize the carp
#19
Posted 20 June 2012 - 09:03 PM
#20
Posted 21 June 2012 - 05:50 AM
You just need to add some ballast to your butt!
I actually have done this and it does help with my trim! I put about half my weights in my integrated BC pockets and the other half on a weight belt to balance out the backside bioprene.
-Gina
