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Maual focus undewater


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#1 riodda

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Posted 18 August 2009 - 07:53 AM

Well after my first 2 rolls apart the color temperature and exposition issues i've also had a lot of focus problems, since i'm a novice scuba diver i'm not yet used to evaluate the distance underwater.
I was planning to build a ragefinde with 2 laserbeams i have but then i found the
HawkEyeŽ Handheld Sonar System PX, it's watrproof up to 60m, from 0.8m to 60m range and 20° angle and also quite cheap, about 100$.
Anybody has used it to focus uw ?


#2 Deep6

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Posted 18 August 2009 - 01:52 PM

Well after my first 2 rolls apart the color temperature and exposition issues i've also had a lot of focus problems, since i'm a novice scuba diver i'm not yet used to evaluate the distance underwater.
I was planning to build a ragefinde with 2 laserbeams i have but then i found the
HawkEyeŽ Handheld Sonar System PX, it's watrproof up to 60m, from 0.8m to 60m range and 20° angle and also quite cheap, about 100$.
Anybody has used it to focus uw ?


Are you using a range finder camera? Far easier and cheaper is to get a copy and study Jim & Cathy Church's book. The section on manual focusing is what you need.

Bob

Carpe carp - Seize the carp


#3 riodda

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Posted 18 August 2009 - 10:49 PM

Are you using a range finder camera? Far easier and cheaper is to get a copy and study Jim & Cathy Church's book. The section on manual focusing is what you need.

Bob


I'm using the good old nikonos
Easier of a rangefinder ????? Possible ??
I'll have a look to the boo anyway.

#4 Deep6

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Posted 19 August 2009 - 08:47 AM

I'm using the good old nikonos
Easier of a rangefinder ????? Possible ??
I'll have a look to the boo anyway.


The ealry books were written for the Nikonos system. You will find a lot of very useful information in the Church books.
Bob

Carpe carp - Seize the carp