Which Dome for Rokinon 8mm Fisheye?

[FrankPro1]

Hello Ikelite,
I am currently building a Sony Alpha A65 w/ Ikelite housing setup. I found the proper port for my macro lens, but am in need of guidance for my 8mm Fisheye from Rokinon. Here is the lens in question: Rokinon 8mm f/3.5 HD Fisheye Lens with Removable Hood HD8M-S B&H

Performance
Focal Length	8 mm
Aperture	Maximum: f/3.5 Minimum: f/22
Camera Mount Type	Sony Alpha, Minolta AF
Format Compatibility	35mm Film / Full-Frame Digital Sensor DSLR (APS-C Sensor)
Angle of View	180°
Minimum Focus Distance	12" (30.48 cm)
Groups/Elements	7/10
Diaphragm Blades	Not Specified By Manufacturer

Features
Image Stabilization	No
Autofocus	No
Tripod Collar	No

Physical
Filter Thread	None
Dimensions (DxL)	Approx. 2.95 x 3.04" (75 x 77.3 mm)
Weight	15.1 oz (428 g)

So which dome and port body combo? Any help would be greatly appreciated! Thanks in advance.

 

[Ikelite Staff]

We've found manufacturer quoted lens lengths to be untrustworthy in terms of recommending a port length. It's important to put the lens on your camera and actually measure the fully extended length from the camera body to the end of the lens. Select your port body based on that length.

You will need the 5510.45 Dome Assembly plus either:

5510.11 if the lens extends up to 2.75"
or
5510.16 if the lens extends up to 3.5"

Please note that you are likely to see some amount of vignetting with an 8mm Fisheye lens. You may need to remove the 8in dome shade to reduce vignetting with this lens.

Regards,

Jean / Ikelite
IKELITE Underwater Systems