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Member Since 01 Apr 2002
Online Last Active Today, 07:16 AM

Posts I've Made

In Topic: Inon Z240 cannot "see" red light signal from Nauticam LED flash trigger?

21 June 2016 - 07:36 AM

I don't think that there is a big difference between single and multi-core fibers if the NA is the same. High NA is the key to good triggering.


In Topic: Scratched my WWL-1 glass

18 June 2016 - 05:48 PM

You can probably get it polished from someone like focal point in Colorado, cheaper than a new one. If you can feel the scratch with your fingernail then it is probably too deep to fix. There are people who think they can do this themselves but they are mostly wrong.  I think focal point charges between $200 and $300 to polish such lenses, there are other companies that do it as well. 


In Topic: Nauticam Compact Macro Converter

13 June 2016 - 03:44 PM

In my hands, the CMC (on the Oly 60 lens) is much better than the SMC and the Multiplier (better DOF and easier to focus) Still the working distance is pretty small.  I love my 45 finder, all I ever use but there is a learning curve.


In Topic: Guide number of a strobe

06 June 2016 - 04:07 PM

The guide number of a strobe works like this. 

GN = Distance x F-stop

For a strobe with a GN of 20 (meters ISO 100) on land, I would estimate a GN of 10 (or less) underwater. If I want to shoot at f:11 then I can be around 0.9 meters or a bit less than 3 feet away.  That is why (even with strobes) the rules about get closer and closer are what they are.


In Topic: OMD-EM-1 flash (FL-LM2) no longer works?

29 May 2016 - 02:04 AM

This flash is very suspect to random failures. On a recent Indonesia trip three separate flashes in different rigs all failed. I buy them on eBay and always carry a few spares.