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OT - Graduated Mask


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#1 riodda

riodda

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Posted 20 July 2010 - 04:48 AM

Hi all, sorry to post this litte off topi not photography related.
I'm goin' to buy a graduated mask, i'm a little shotfocussed and outside the water i have -1.75 and -1.25 (very little astigmatism that i can think about not correcting) i've been told that i have to decrease the correction of 25% while on my beliving air whater interface is a positive lense so i was thinking about increasing the correction.
Anybody that can clarify this point ?
P.S.
I can't use contact lenses.

#2 bvanant

bvanant

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Posted 20 July 2010 - 10:21 AM

Hi all, sorry to post this litte off topi not photography related.
I'm goin' to buy a graduated mask, i'm a little shotfocussed and outside the water i have -1.75 and -1.25 (very little astigmatism that i can think about not correcting) i've been told that i have to decrease the correction of 25% while on my beliving air whater interface is a positive lense so i was thinking about increasing the correction.
Anybody that can clarify this point ?
P.S.
I can't use contact lenses.

Call Linda at Prescription Dive Masks in San Diego. She is a diver and an optician and has made several masks for me with great results
http://www.prescriptiondivemasks.com/

I am not affiliated with them except as a happy customer.

Bill

Bill
Canon 7d, Nauticam, Lots of glass, Olympus OMD-EM5, Nauticam, 60 macro, 45 macro, 8 mm fisheye, Inon, S&S, Athena Strobes plus lots of fiddly bits.
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