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Subsea or FIT Pro diopter


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#1 sharky1961

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Posted 14 February 2012 - 09:11 AM

Hi,

I am looking for a wet diopter.
Wich would you recommend and why the Subsea or the FIT Pro??
Who has done some comparissing tests with them??


Rob

Nikon D800 in Seacam D800,  Nikon 16mm, 16-35mm, , 60mm, 105mm,1.4 and 2x TC, 2x Sea&Sea 110a, 2x Seacam Seaflash 150


#2 Alex_Tattersall

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Posted 14 February 2012 - 11:58 AM

Have a look at this

This doesn't however take into account the size and weight of the diopters and ease of use. I sell both of them but still prefer a combo of +8 and +16 FIT Pro for size and ease of lighting but this takes the price upwards somewhat.

http://www.deepshots...e-up-lens-test/
www.flickr.com/photos/alextattersall

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#3 sharky1961

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Posted 14 February 2012 - 01:37 PM

thanks Alex.helped me a lot.
How much bigger in size is the Sub sea +5 compared to the Fit Pro +8?

Nikon D800 in Seacam D800,  Nikon 16mm, 16-35mm, , 60mm, 105mm,1.4 and 2x TC, 2x Sea&Sea 110a, 2x Seacam Seaflash 150


#4 Alex_Tattersall

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Posted 15 February 2012 - 12:04 AM

SUbsee is a 67mm thread, Fit Pro is a 46mm thread. Fit Pro is also about half the depth.
www.flickr.com/photos/alextattersall

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#5 SlipperyDick

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Posted 22 April 2012 - 10:41 AM

Rob - I know it's probably a little late, but just so you know what you're purchasing, beware that the stated dioptric strengths of the FIT lenses are only valid in air. Underwater, they lose around 60-70% of their power because their lens elements are not sealed in air. Here are their approximate values underwater:

F.I.T. +5 = +2
F.I.T. +8 = +3
F.I.T. +16 = +5

So combining the F.I.T. +5 and +8 is as powerful as the SubSee +5 on its own, and combining the F.I.T. +16, +8, and +5 are as powerful as the SubSee +10 on its own.

Keri
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#6 CheungyDiver

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Posted 23 April 2012 - 05:21 AM

Rob - I know it's probably a little late, but just so you know what you're purchasing, beware that the stated dioptric strengths of the FIT lenses are only valid in air. Underwater, they lose around 60-70% of their power because their lens elements are not sealed in air. Here are their approximate values underwater:

F.I.T. +5 = +2
F.I.T. +8 = +3
F.I.T. +16 = +5

So combining the F.I.T. +5 and +8 is as powerful as the SubSee +5 on its own, and combining the F.I.T. +16, +8, and +5 are as powerful as the SubSee +10 on its own.

Keri



+16+8+5 = + 29 no ? And the focal length - must be squishing the fish ? So water will reduce magnification due to surface curvature - make it 33% less efficient Hmmm!

LOL. Thats a lot of glass just to do +10......Definitely not compact. Longer than Subsee for sure.

Could fix that. Just add air and less glass ;0)

Cheers

David

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