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Member Since 08 Aug 2008
Offline Last Active Yesterday, 05:01 AM

Topics I've Started

Electronic control of focus range in Olympus cameras

20 March 2015 - 05:21 AM

Hope i am not creasting false hopes, but what i put in the title is something i would loooove that Olympus puts in place.


What this is about?

It's about the great ability of the Oly 60 mm 2.8 macro lens to restrict the focusing range within a limited distance, in order to optimise the autofocus speed.

Capability to access this setting underwater would be maravellous for obvious reasons, and would reduce the gap in Autofocus speed versus DSLR cameras (i often miss my trusty Nikon D300 in that area).

Actually, this would be useful in about any lens i think, even on a fisheye, if you know you're shooting CFWA why wouldn't you like to limit the focusing range from lens glass till, say 10cm.

From a product positioning standpoint, Olympus are very concious about underwater photography (they manufacture housing), so this would be in line.

I would personally be ready to upgrade to a newer camera for that single reason (well, increasing battery life wouldn't hurt either...).



I am not an Olympus engineer, but with the number of things that can be electronically controlled in Micro 4/3 system, i am pretty confident this would be doable. Take the example of the 12-50mm zoom lens, i think there's some ability to get to the "macro position" electronically.


So how do we get it done?

Two years ago i dropped a hopeful email to Olympus but didn't get any answer.

Any other idea on how to get their attention?


I guess the first step would be to see whether you guys would also like that capability.

And if there's a few of us, discuss what's the best mean to convey that suggestion to them (photo show, some ideabox...).


Thanks in advance for your comments!




Snorkelling advice in Trinidad?

23 February 2015 - 12:22 AM

Hi folks,


What's worse than missing that great business trip in a diving destination like Trinidad (the main island of the Trinidad & Tobago country, few miles aways from Venezuela)?

Well there's getting on the trip, but having no time for even a single dive there.... :angry2:


However i might have 2-4 hours private time to go snorkelling on Wednesday early morning (i've brought my Oly OM-D EM-5, its Nauti housing, and a Sola 600 light, just in case...).


Question to you: could you please advise where i should go for that snorkelling?

Knowing my hotel will be just next to Piarco airport.


Hope somebody has tips, as i understood the beaches in Tobago have very diverse quality.




Z240 erratic behavior after 3 year - expectable?

29 June 2014 - 12:00 AM

Hello all,


I am writing to report a problem i have encountered with my 2 Inon Z240 type IV strobes. I have done a search on this forum for similar issues, but what i found was different, people were having issues in Manual, not in TTL, and this was due to corroded ACC (auto-cancel circuitry) button.


First, let me state that these 2 strobes have been purchased in April 2011, always used together, first with a Nikon D7000 setup (housed in Hugyfot), and since May 2013, with an Olympus OM-D EM-5 camera (housed in Nauticam NA-EM5). Always connected to cameras with optical fibres, produced by Inon (those which screw nicely on the strobes). I use them mostly in TTL, though occasionally i have used them in manual with my Olympus camera (in which case, i set the camera to shoot manually, 1/64th of flash power, so I should not be impacted by ACC whatsoever).


I never had any trouble with these strobes, until recently:

-21nd June: did 2 dives, strobes worked perfectly. In the evening, i changed the eneloop batteries in preparation for the second day.

-22nd June: from the beginning of the dive, the left strobe didn't work well, either not firing, or firing very weak. I did multiple configuration changes, from TTL to manual and back, unplugged the optical fibers from the housing side and plugged back. At the end of the dive it seemed back to normal (screwed almost the full dive...), but honestly i don't remember exactly what i could have done which worked eventually (had other gear issues and tried many many things). Needless to say i checked the stobes for water leak in the evening, there wasn't any.

-27th June: we go diving! and i have the unpleasant surprise to see my strobes are going mad again: first i am shooting TTL and then manual, the left strobe doesn't fire at all, the right strobe fires a tiny bit, not enough to lit. Then i switch to manual and it doesn't help, i don't manage to lit the subject... Apparently (my wife was observing) the left strobe didn't shoot, and the right one did (but was mostly very weak). However i randomly had some shots well lit (a bit over-exposed actually), which i presume were lit by the right strobe - it's been about 1 shot every 5, and then i got some series of 5-6 shots with  right strobe firing... To conclude, the behavior of the right strobe was totally unpredictable, and the left strobe wouldn't shoot.

-28th June: i am back home and take the housing in the pool for some more relaxed testing (I hadn't opened anything). Same symptoms as before, so I try to switch the optical fibers (just the strobe ends), and miracle! my left strobe is now working, and the right one doesn't work. Of course i am guessing i've got 1 optical fibre problem, but just to see, I also switch the optical fibres on housing end and... both strobe work! both in TTL and manual..

Of course before each dive i would do a dry strobe test, which passed all times.



I would tend to conclude on fibre optics issues, but when I look at my fibre optics on strobe end i can clearly see the camera's flash light transmits well, on both.

I can't say I am relieved because i am still not clear on the root cause, so I don't know whether my strobes will spoil my next dive or not. It seems easy to blame the optical fibres, but why would the strobe manage to lit from time to time (27th June), whereas I haven't touched the optical fibres??


Does anyone see clearer in what happened to me? Could it be that my optical fibers got sort of ill-positioned (twice) and that would explain the whole problem?



Another thing that worries me is the call i gave to an Inon dealer on 27th June, to get his opinion on my problem. He's saying that it's not at all surprising that strobes stop working after 3 year of usage, because there are components which perish inside (e.g. capacitors, but also others). So he offered that i send the strobes to him for repair, and in the (likely) event that he wouldn't be able to fix them, he would ship them to Inon japan. He sais such a service has costed about 500 Euros (and one month waiting) to another customer for 2 Inon Z240s!!! I asked if there would be other strobe brand where you don't have to pay 250 EUR/strobe after 3 years, and he told me Inon were the most reliable ones in his view...

3 years of ownership for me should be about 150 dives, and i am sure there's plenty of much more active shooters around here. I am wondering if all have had failing Inon Z240s.


What is your reading of the above? Is it normal to go through costly repair of your Inon Z240 after 3 years of usage?


thank in advance for your help on this,

i am must stay i am quite puzzled/disappointed, but maybe I am just unaware that strobes are (expensive) perishable items.




Subsee+10 on Oly 60mm does not focus... am I dumb?

27 May 2014 - 05:18 AM

Hi macro enthusiasts!


I am having probably a silly problem, but cannot find the solution by myself, so I'd need some advice...


My camera is an OM-D EM-5, that I use with an Olympus 60mm macro, all in Nauticam housing+port.

This works brilliantly, the camera focuses very well underwater.


But when I add my new Subsee+10 dioptre, attached with the Nauticam flip dioptre holder, I cannot manage to get in focus. That brilliant auto focus doesn't work at all anymore.

I was expecting some degradation, but not that much.


What's your experience with such a setup? Do you shoot everything in manual focus?