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Member Since 02 Aug 2005
Offline Last Active Mar 26 2006 06:46 AM

Posts I've Made

In Topic: Using two SB 800 U/W with D2X

12 November 2005 - 10:11 AM

I can only speak for the SB800 & the Nikon D2X...

I want to reply, because I'm almost 100% sure that it's not correct that
the preflashes are automaticly switched off, when the speedlight is in the straight head up position! No mention in my (French) manual! Ofcourse, when you are using the SB800 on land (fixed on the camerabody), you have to cancel the monitor preflash (otherwise incorrect exposure results / maybe this is mentioned in a manual), but this is because the preflashes are sent in the wrong direction (this is not the case when the speedlight is in the straight head up position in a tubular housing / pointed to the right direction). (reaction for Fisheyedave)

I'm using two kinds of housings for my SB800 (Seacam / tubular housing) and the Sealux. (But I'm using ALMOST always two Subtronic Megacolors ON MANUAL MODE / works very good) The (invisible) preflashes are read by the camera-sensor on I-ttl mode (not by the sensor of the SB800 / so a tubular flash-housing is no problem).

But using two SB800 together on I-TTL, THAT'S THE REAL PROBLEM. (same reaction as Carlos Morais !!!)

Wiring the flashes is possible, but without preflashes (no I-TTL) on mode
A-TTL AA-TTL, and then you need a flash-housing which is NOT covering the sensor in front of the SB-800. I don't think this is very reliable... (personal opinion)

See above in this forum "MARC FURTH" (the self-made-man) solved the problem (using two SB800 both together on I-TTL / tubular housing). One flash connected to the camera, the other flash connected by a fibre cable to the first strobe!!! (again congratulations Marc Furth)

Harald Hordosch (president of Seacam) mailed me about the new Seaflash digital 250 (I-ttl) : 2 flashes are also working in I-ttl mode - connected through a fibre cable. It's imported that only one strobe is connected to the housing - the other strobe from strobe... (same solution as Marc Furth) (Maybe the future new cable of Seacam can also be used with the SB800... / we are not all self-made-man) Maybe Harald Hordosch has read Marc Furth's solution in this forums...

With the new housing of FANTASEA the sensor at the side of the SB800 (for wireless-flash) is not covered. MAYBE (just maybe) it's possible that WIRELESS-flashmode (I-ttl) is working when using this housing for the slave-flash.


Using "ONE" SB800 (in both of the housings) on I-TTL works very good.
It's a cheap way to have a good UW-strobe.

In Topic: Using two SB 800 U/W with D2X

09 October 2005 - 09:36 AM


Congratulations Marc, I'm very impressed!

My project (I-ttl using the second on slave) didn't work very good with
the Sealux-housing. Probably because the sensor is to much covered.
I'm stil working at a second solution (wiring).

Personally I think housing a SB-800 is a very good and cheap solution
to have a good UW-flash. But when you like to use 2 flashes, there is a big problem. (you were the first to solve this problem)

In the past Alex Mustard was also looking for solutions because he didn't
want to loose TTL underwater (when changing to digital). Read the article : www.oceanoptics.co.uk/dttl.html.

This only to say that Alex only wants to say that you can live without TTL... (and that's the thruth)

Today I'm leaving for a diving-vacation (Maldives) with one SB800, 2 Subtronici Megacolors (using on Manual) and a set of Magicfilters (using without flash / and after reading the article of James also with flash).


In Topic: Using two SB 800 U/W with D2X

06 September 2005 - 10:52 AM

Question from "Luiz ROCHA" Aug 23 2005
"How about the new subtronics? They say they do support iTTL, but is
it only one? I mean if you have two subtronics, does one have to be on

Today I received the following answer from Subtronic (probably our questions are difficult !?)
"We don't have the Nova up to now. We try to produce it until Boot 2006.
We ant tot design the NOVA to work with D2X and when it works we can use two Novas in iTTL mode with the Camera. Onze of them as master, one of them als slave, but wired in iTTL-mode."


"1" sorry I asked only about the NOVA because I'm only interested in the Nova (almost the same power as my old Mega-Color).

"2" Boot 2006 is probably "oktober 2006".

"3" The solution of SUBTRONIC iTTL & wiring two flashes, is possibly the
same as I was thinking about (post in this forum aug 23) / because iTTL
with two flashes (second on slave iTTL) seems to work, I stopped looking for the other options.

"4" I received my magical-filters and on my next diving vacation (2005.10.01) I'm probably going to use/test the filters for wide-angle most of the time and my old Megacolor Subtronic on manual for macro !

In Topic: Using two SB 800 U/W with D2X

25 August 2005 - 09:37 AM

The slave I-ttl is wireless !

I tried "topside" "INSIDE A HOUSE" and it was possible to place the flashes more than 7 meters away (both flashes looking at the same direction). But the walls were white... Then I tried outside (less reflection / no walls) and it didn't work at 7 meters when both flashes were looking at exactly the same direction, but when I turned the flashes just a little bit, it worked again. I only checked if the flash went of (didn't check if TTL worked).
It was topside (air you know). The only way to discover how it works underwater is to test it...


In Topic: Using two SB 800 U/W with D2X

24 August 2005 - 10:08 AM

Rocha : I mailed to Subtronic, but I didn't get the answer yet. Strange (stupid) I never considered that a digital Subtronic could possible have the same problems in working together as the SB800's... (I hope they don't). Let you know when they answer me.

to ssra30 : The german housing-builder SEALUX confirmed me that "slave i-TTL" works fine UNDERWATER... (hadn't the opportunity to test it / my housings are covering the slave-sensors... / but I hope it's the truth) With my old F5 I worked a lot of time using one wired flash and one flash in slave TTL (It worked...). If you want to take a look at te SEALUX housing for the SB800 (It's realy ugly, but as far as I know it's the only housing "not covering" the slave-sensor)