
Ikelite 8" Dome
#101
Posted 18 March 2005 - 07:16 AM
I would not recommend using an 8" dome port with the 100mm lens. You won't get as much magnification, but more importantly, there's a VERY good chance that you'll scratch the dome when you get in close for macro shooting.
I would plan on purchasing one dome port, with appropriate extension rings, (I doubt the same ring will be ideal for use with BOTH the 10-22 and the 18-55) and one flat port. That's how most housings work - two port-fronts and a bunch of extension rings and gears.
Cheers
James
Dual Ikelite Strobes
Photo site - www.reefpix.org
#102
Posted 18 March 2005 - 08:03 AM
Thanks for testing the 15mm with this port. You state that the extension ring is a few mm too long.
If the sharpness looks good and it doesn't vigenette then what is the problem with using this extension ring?
Also, with the 18-55mm extension ring you have, how close is the donought on the back side of the dome to the port snaps? Can you still get your fingers in there? I'm assuming that to use the 10.5mm you will need a shorter extension ring. Does it look possible to use a shorter extension and still work the snaps?
Just trying to budget (and prepare my wife) for the three major UW purchases I have planned this year.
1) MF/AF port for the 105mm
2) iTTL conversion (when available)
3) Port for the 10.5mm (could be the 8" dome)
If I get the 8" dome it would be nice to move to one port and set of extensions for my WA lenses. I currently have 3 dome ports and the 10.5mm 5503.15 would make four.
Thanks
UWPhotoNewbie: Not such a newbie to diving and UW photography.
Nikon D70: 60 mm, 11-16mm, 105mm, 15mm, 10.5mm
Ikelite iTTL Housing, dual Ikelite DS125
Nikon D600 topside 14-24, 28-300, 70-200, 35,50,85
#103
Posted 18 March 2005 - 08:37 AM
www.kdietz.com
#104
Posted 18 March 2005 - 10:55 AM
I don't have an extension ring for the 18-55. I have a ring that Ike sent me to test with the 10-22 and I think it is the proper length (based on my test results) so I'm assuming Ikelite will put it in their port chart and it will be "official."
With the ring I have, there is just enough clearance to latch and unlatch the port. I doubt you could "bring the port closer" to the housing, without altering the doughnut design. This is why the current design doesn't work with the 10.5mm Nikkor.
RE the 15mm Sigma: I have used this lens in the past w/ an Aquatica housing and the lens sticks a bit further into the port. Based on my experience, that looked like the right spot for the lens with respect to the radius of curvature. That's not to say that when I used the dome on the Ikelite housing yesterday and the lens didn't stick out as far that the image wasn't good. I think the sample I posted looks good, but it may because fisheye lenses are very forgiving in this regard.
Cheers
James
Dual Ikelite Strobes
Photo site - www.reefpix.org
#105
Posted 18 March 2005 - 12:05 PM
I was thinking I would only need two ports for my lens selection at this time....
The 100mm macro port and the 8" port for wide shots using 10-22 or 18-55
thanx for posting your tests
#106
Posted 07 April 2005 - 02:55 AM
I'd have to say that the Ike 8" port did very well...

Now If I could only get B&H to ship me my housing.....
Already have the large port and the 10-22mm lens, can't wait to go play with it...
Its first trip is going to be Komodo..

#107
Posted 07 April 2005 - 08:11 AM
I imagine you were using the 8" dome on the trip? What did you think? I looked at the site quickly but couldn't find the photos with the 8" dome. Do you have any examples? How does it compare to the standard ports in real-world shooting?
Great shots everyone!
UWPhotoNewbie: Not such a newbie to diving and UW photography.
Nikon D70: 60 mm, 11-16mm, 105mm, 15mm, 10.5mm
Ikelite iTTL Housing, dual Ikelite DS125
Nikon D600 topside 14-24, 28-300, 70-200, 35,50,85
#108
Posted 07 April 2005 - 08:27 AM
I thought the performance was better than what I usually get with the smaller dome.
The larger dome makes the rig positive....1 ended up with a 2 pound weight on the tray to make the rig neutral underwater....the dome always wanted to tilt up, but it really isn't that bad unless you are shooting a lot one handed....the dome is unprotected and easy to scuff....minor scratches come off easily with toothpaste or mild acrylic polish....a fisheye shade would be nice to have
FWIW, I'll always use this dome from now on....except for the 10.5mm
My webpage should be updated in the next day or two with more shots
Karl
www.kdietz.com
#109
Posted 07 April 2005 - 08:44 AM
The larger dome makes the rig positive....1 ended up with a 2 pound weight on the tray to make the rig neutral underwater....the dome always wanted to tilt up, but it really isn't that bad unless you are shooting a lot one handed....the dome is unprotected and easy to scuff....minor scratches come off easily with toothpaste or mild acrylic polish....a fisheye shade would be nice to have
Karl
Maybe the Ike 8" SE should have a 1.5lb fisheye shade to both balance the camera and protect the dome. Karl, is your rig so positive bouyant that it would float away without the 2-lb weight?
Rick
Canon EOS 5D Mk III; Canon 14mm II; Canon 50mm f/1.4; Canon 100mm macro; Canon 8-15mm
Aquatica A5Dsr housing Aquatica AquaView Viewfinder Dual Sea&Sea YS-250Pro Stix Arms
www.ricklevesque.com/
#110
Posted 07 April 2005 - 09:38 AM
always use this dome from now on....except for the 10.5mm
Why wouldn't you use it for the 10.5, and what is the option?
I use this dome on the Aquatica with the S2, and was told that the only change I need to make for my 10.5 is to removes the "big" shade and use a shorter extension (or none, can't remember).
Also, Aquatica does make shades for both the 12-24 configuration and the 10.5 configuration. Wont these fit on the Ike dome setup? When I looked at the Ike setup last week on a friends rig, the outer diameter looked the same to me...
#111
Posted 07 April 2005 - 09:48 AM
Because of the parts needed to interface between the Ike housing and Aquatica dome, the shortest extension will still cause vignetting with the 10.5mm...it can't get as close to the housing as it can with an Aquatica housing...bummer, but the Ike 10.5mm dome works very well IMHO
The Aquatica shades will work....I just need to BUY one

Karl
www.kdietz.com
#112
Posted 07 April 2005 - 09:59 AM
Don't think the lens shade is going to correct your weight issue, but it wont hurt either!
#113
Posted 07 April 2005 - 10:28 AM
www.kdietz.com
#114
Posted 07 April 2005 - 07:27 PM
Doug
#115
Posted 11 April 2005 - 03:54 PM
Hey all,
For what it's worth, I read years ago about acrylic optical properties being superior to glass,
read all:
Scubag: really nice shots! but...still some falloff/corner softening. the Canon 10-22 is an
amazing lens, but corner sharpness still eludes me. We're doing pool (awggggg!) on Friday
AM with various port extensions and hope to put the issue to rest!
Tom Stack
http://www.tomstackphoto.com
applications that take advantage of its superior clarity, scratch
resistance and UV stability characteristics. Acrylic is also more
transparent than glass, lighter in weight, and is used in many
applications where glass has been traditionally used.
The exceptional weatherability of acrylic also makes it ideal for
most outdoor applications where transparent materials are
required. Acrylic is very rigid, providing stability in design.
Perhaps the most outstanding feature of acrylic materials is their
optical clarity. Acrylic transmits more light than any other
material. This makes it an excellent choice for lenses and other
applications where optical quality is required.
http://www.plasticsm...pp-acrylic.html
Tom Stack
http://www.tomstackphoto.com
#116
Posted 11 April 2005 - 04:22 PM
Cheers
James
Dual Ikelite Strobes
Photo site - www.reefpix.org
#117
Posted 11 April 2005 - 07:36 PM
I like the way they say "superior scratch resistance." LOL - superior to what, butter!?!?!?



Luiz Rocha - www.luizrocha.com
Nikon D800, Aquatica AD800, Ikelite strobes.
#118
Posted 11 April 2005 - 09:18 PM
regards...
- MP
The Shark Research Institute -Director of Field Operations
Bimini Biological Field Station - Sharklab - PIT Project Staff
www.matthewdpotenskiphoto.com
#119
Posted 12 April 2005 - 04:15 AM
Karl
www.kdietz.com