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bvanant

Member Since 01 Apr 2002
Offline Last Active Today, 04:09 PM
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Posts I've Made

In Topic: Sync cord capability

18 May 2018 - 03:44 PM

HUH? Do you mean fiber optic or electrical sync. Electrical sync has run TTL protocols for more than 40 years. Fiber optic is another story altogether. Which do you mean.

Bill


In Topic: LED strobe trigger not enough power

18 May 2018 - 03:38 PM

Diego:
I think there are two issues. One is that if you are trying to get Olympus TTL from an LED that will I think be very difficult. 2 mm single core fiber most likely will have a very low NA so that might not work well. For less than 20 euro you can test out using a double fiber setup using the Inon Bushings and some 1 mm single core fiber (I can send you a double fiber cable if you want). The multicore fiber is about 6 euro per meter. No one you dive with has some good fibers?

Bill


In Topic: Micro 4/3 with Wet WA for Comapact

10 May 2018 - 04:34 PM

I don't have the SWAL but the tests from Bluewater suggest that it will vignette a bit on the EM-10. I am sure that you can find a zoom setting where vignetting is not appreciable, but for a micro 4/3 sensor it will probably not be as wide as it will be on a compact sensor. as for the WACP, it probably won't work very well except on full frame cameras. BUT the results that I have seen from that lens are quite nice (a bit pricey though).

CHeers

Bill


In Topic: Sea&Sea YS-D1/YS-D2 Not Designed For High Speed Sync

10 May 2018 - 10:07 AM

TTL exposure underwater can not be better than TTL exposure of the camera/strobe on land. In my hands at least, Olympus EM1 mark I had pretty poor performance of TTL using the small flash at anything other than f5.6 to f14.  Outside those bounds, I got very uneven results.  Certainly fiber optics can play a part, but it is hard to understand how two shots 5 seconds apart could yield one over and one under exposure with the same setup.

 

Cheers

 

Bill


In Topic: Micro 4/3 with Wet WA for Comapact

10 May 2018 - 10:03 AM

Get the Nauticam version, for sure it will work with EM-10 (for the right lens). To the OP, I guess that what you want (small camera, completely versatile on a single dive and quality of DSLR) is very unlikely.  I shoot the EM1-II and like it a lot, but it is not quite the same quality of a DSLR.  Also, when you think of wet lenses, they are never quite as good as a prime lens in the appropriate port.

 

Cheers

Bill