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Old 22nd February 2012, 22:47   #1
edivad
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gopro 2 flat lent

Hello,
just received a new gopro 2 camera.
Now the problem is ... which flat lent ? I want to spend less than 100 euro ( so no golem gear and similar)
I would use it for wreck dive between 50 and 80 mt (in the highest definition) ... There is something on the market? Vignetting is not a big problem for me

thank you

davide
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Old 23rd February 2012, 12:58   #2
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Re: gopro 2 flat lent

Check with Sartek.

Sartek Industries Home Page

Carl probably has a flat port housing for it. The one he did for the original Hero HD is listed for $100.
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Old 23rd February 2012, 15:17   #3
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Re: gopro 2 flat lent

Hi davide,

Two links where you will find your happiness


Lentille Oculus pour caméra GoPro HD



BlurFix Gopro
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Old 23rd February 2012, 18:16   #4
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Re: gopro 2 flat lent

Quote: (Originally Posted by edivad) View Original Post
Hello,
just received a new gopro 2 camera.
Now the problem is ... which flat lent ? I want to spend less than 100 euro ( so no golem gear and similar)
I would use it for wreck dive between 50 and 80 mt (in the highest definition) ... There is something on the market? Vignetting is not a big problem for me

thank you

davide
You may also wish to try a shop from Germany GOPRO HD Kameras

/GKAM
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Old 23rd February 2012, 23:59   #5
edivad
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Re: gopro 2 flat lent

Thank you very much.
At the end I chose the oculus lent because it is sold in europe (no overseas shipping) and seems to be more resistent to the pressure. We will see...

the uk-germany aluminium housing is wonderful...but too expensive for me...

davide
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Old 24th February 2012, 07:26   #6
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Re: gopro 2 flat lent

Why does the Go Pro have a curved lens? Is it part of the optics of the camera? Does it turn it into a Wide Angle lens?
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Old 24th February 2012, 09:33   #7
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Re: gopro 2 flat lent

Quote: (Originally Posted by Packhorse) View Original Post
Why does the Go Pro have a curved lens? Is it part of the optics of the camera? Does it turn it into a Wide Angle lens?
The gopro is mainly used in ground sports. You have to buy a flat lens to remove the fuzzy due to curved lens. The optics of the gopro can shoot wide angle.
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Old 29th February 2012, 06:43   #8
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Quote: (Originally Posted by Packhorse) View Original Post
Why does the Go Pro have a curved lens? Is it part of the optics of the camera? Does it turn it into a Wide Angle lens?
It's to support the internal fisheye optics of the lens in air.

Underwater it's in the wrong position and/or too small to all the gorpo to focus on the virtual image the dome projects. You need a flat lens to fix this, you you get serious vignetting with most of them and on medium fov the image is ~30% narrower due to refraction through the flat interface.

A larger dome, positioned more forward would do the trick I suspect and enable fisheye optics underwater.
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