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

[TABLE="class: specTable"]
[TR]
[TH="class: specHeader Header, colspan: 2"]Performance[/TH]
[/TR]
[TR]
[TD="class: specTopic"]Focal Length[/TD]
[TD="class: specDetail"] 8 mm[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Aperture[/TD]
[TD="class: specDetail"] Maximum: f/3.5
Minimum: f/22[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Camera Mount Type[/TD]
[TD="class: specDetail"] Sony Alpha, Minolta AF[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Format Compatibility[/TD]
[TD="class: specDetail"] 35mm Film / Full-Frame Digital Sensor
DSLR (APS-C Sensor)[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Angle of View[/TD]
[TD="class: specDetail"] 180°[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Minimum Focus Distance[/TD]
[TD="class: specDetail"] 12" (30.48 cm)[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Groups/Elements[/TD]
[TD="class: specDetail"] 7/10[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Diaphragm Blades[/TD]
[TD="class: specDetail"] Not Specified By Manufacturer[/TD]
[/TR]
[/TABLE]
[TABLE="class: specTable"]
[TR]
[TH="class: specHeader Header, colspan: 2"] Features[/TH]
[/TR]
[TR]
[TD="class: specTopic"]Image Stabilization[/TD]
[TD="class: specDetail"] No[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Autofocus[/TD]
[TD="class: specDetail"] No[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Tripod Collar[/TD]
[TD="class: specDetail"] No[/TD]
[/TR]
[/TABLE]
[TABLE="class: specTable"]
[TR]
[TH="class: specHeader Header, colspan: 2"] Physical[/TH]
[/TR]
[TR]
[TD="class: specTopic"]Filter Thread[/TD]
[TD="class: specDetail"] None[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Dimensions (DxL)[/TD]
[TD="class: specDetail"] Approx. 2.95 x 3.04" (75 x 77.3 mm)[/TD]
[/TR]
[TR]
[TD="class: specTopic"]Weight[/TD]
[TD="class: specDetail"] 15.1 oz (428 g)[/TD]
[/TR]
[/TABLE]

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