Ikelite shows a new dome port, slips on to standard port for the G10, JFYI. Corrects coverage of lens to true 28MM focal length FOV. Not wide enough for me but may be fine for most. Good going Ikelite.
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Ikelite dome port for G10
- Thread starter Nemrod
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SFLDiver3445
Contributor
It really is a shame that Ikelite hasn't developed an option which would allow the addition of more poweful wide angle lenses, but I guess this is better than nothing.
However, if I were going to spend a few thousand dollars seting up a system with a housing and a couple of strobes, I would definitely not be satisfied with the limitations in wide angle shooting Ikelite has placed on their G10 housing, but that's just me.
OP
I agree, a step in the right direction but short of the mark for wide angle guys like you and I.
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SFLDiver3445
Contributor
Mel Moncrieff
Contributor
Ikelite claims that this is wider than the G9 with their wide angle adapter. Is this not true?
Mel
Mel
OP
The G10 has a 28MM (35 MM film) focal length at full wide. (correct?). That is a fairly wide angle lens, field of view about 65 degrees. Through a flat port it is reduced to about 54 degrees per Snell's Law. Therefore the dome port effectively retains the full 65 degree FOV--excellent. However, that is not wide angle for underwater use. That, in my opinion, begins around 90 degrees of viewing angle which is an 18MM focal length with corrected dome port. The Ikelite converter claims to have a multiplication factor of 0.56X. producing a FOV of just under 90 degrees if it were on a short, flat port on a G10 zoomed to 35MM which is what their wet mount lens requires.
So, the answer is no, their wet mount potentially would be wider, significantly so with a properly fitted wet mount lens than the native 28MM in a dome port corrector.
The outfit, Patima, G9, Inon 100WAL in Inon dome port, SFLDiver shoots is around 130 degrees field of view and the modified Canon/Ikelite I made up is around 120 to 150 degrees FOV just for reference.
If Ikelite would fit their housing for the Inon 28AD mount 100 degree wet lens fitted with the Inon dome their FOV resulting would be 130 degrees or more which is equal to a 10MM focal length lens (35MM film equivalent)
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