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Member Since 29 Mar 2012
Offline Last Active Sep 01 2016 11:05 PM

#323999 a couple of questions regarding 7d lenses and possilbe OM D

Posted by MortenHansen on 07 January 2013 - 12:13 PM

I think the 6" dome will be great, as far as I understand Its not always a case of the bigger the better.
I should probably mention that I am by no means an expert in dome-port optics but what I know is that the length of your extension ring (ring that goes between housing and dome) is extremely important for overall sharpness/ability to focus (see the lens chart).

I always shoot with the 10-17 and a very small 4" dome and I love it, because of the strong curvature of the small dome you do get unsharp image corners at high apertures. If you want to have the corners tack sharp then you need to stop down to f.8 or lower, but then again, how important is it really that the corners are totally 100% sharp?
Hehe, think of that gorgeous shark over-under shot with the one eye above the surface, teeth clearly showing, almost bumping the dome with his snout, while the sun is setting in the background, now tell me if you really care about having tack-sharp corners :P

As far as I can see, the only major disadvantage of using a small dome such as my 4" mini-dome is that over-unders are basically impossible to get right, for that you need a bigger dome, I believe a 8" or even a 9,5" is preferred by most.
With a 8" or 9,5" dome of course then it would be impossible/very hard to get close-focus-wide-angle shots of critters :/
It seems there is never a perfect choice that is great for everything but I guess the 6" dome is a good choice to start out with! :)

Happy bubbles, Morten

#322935 PADI goes solo

Posted by MortenHansen on 19 December 2012 - 01:37 AM

Having more awareness on the issues of solo diving is for sure great!

As far as I have understood from googling a little: The PADI Self reliant diver course is not a solo diver course, it is meant to teach someone the skills to avoid getting into a sticky situation if they by accident get separated from their buddy.

I think these courses are excellent, teaching people to be more independent rather than relying on someone else to plan, think and dive for them.

The only thing that I am strongly opposed to is the minimum course entry requirement of only 100 dives.
In my short time as a diving instructor/guide/manager I have seen a billion and one people who can not dive at all with 100 dives.

If you think about it, 100 dives are only 4-6 diving holidays and since a lot of people only do one dive holiday every 2 years that means that they've maybe averaged 10-15 dives/year for the last 7-12 years. That is in my opinion not enough to be a self reliant diver (for the vast majority of people).

If they would put up the minimum requirement to say, 400-500 dives + proof of doing a minimum of maybe 50 dives/year for the last 3-5 years. Now that would be a different story.

Anyways, that's the way I see it.

enjoy, and be safe! -Morten

#322202 Sex on the reef, well foreplay anyway.....

Posted by MortenHansen on 07 December 2012 - 08:57 PM

Awesome- moorish idol shot rocks!

#318979 Redang Island, Malaysia. Wide Angle with Divers

Posted by MortenHansen on 24 October 2012 - 03:30 AM

Seems like you had a lot of fun doing these shots, unfortunately it looks like the guy on the right is resting with his fins on top of that table coral, it sort of ruins the otherwise cheery-pictures for me, even though it might not be the case and that it only looks like it (post 2, picture 1).


#316945 Whale sharks of Cenderawasih Bay, West Papua, June/July 2012

Posted by MortenHansen on 22 September 2012 - 05:34 PM

Hi Leon & Claudia!

Congrats on the nice footage, incredible how easily animals change their behavior when humans start interfering, hopefully the sharks will be able to change back if the fishermen ever decide to move to another location.

The Leatherback turtle is very high on my must see list- gotta be an amazing experience!

I was only wondering, are there any regulations when tourists film/photograph the turtles while laying eegs?
The leatherbacks are rated "critically endangered" by the IUCN.
I am in no way an expert on this, so correct me if you think I'm wrong, but what I remember from previous experiences working with turtle conservation programs in Lombok and Malaysian borneo is this:

1: Avoid using flash on turtles while being on land as it can confuse and scare the turtle to a point that she will give up laying her eegs. Also it is not recommended to use high intensity torches, especially one should take care not to shine the torch/flash the camera in the "face" of the turtle.

2: Make sure that you do not light up the beach with any artificial light (headlights of cars, hotel/restaurant lights, bonfires etc).

3: Stay at the tree-line, do not walk on the beach as you will never know if you're walking on top of a turtles nest and crushing the eggs.

4: Finally, don't touch the turtles unless absolutely necessary (if the turtle cannot find its way back into the sea because of artificial lights etc)

As we can see in the video there seams to be taken data of the turtles, and to my eye it even looks like they are doing tagging- which is something I wouldn't expect here in Indonesia, big thumbs up for that, would just wish that the tourists would be a little more careful.

Anyways, it looks really cool whats going on out there in the east, whale-shark galore, leatherbacks, gotta get some time off and finally come out for a visit! Is the leatherback population large enough that there is a good chance to see them while diving/snorkeling?

Happy bubbles, M.

#316226 Camera handling for split shots

Posted by MortenHansen on 12 September 2012 - 05:52 AM

Use inflatable floaties, you know the things that you put on the arms of your kids when they go swimming. Attach them somehow to your housing and the great thing is that depending on how much positive buoyancy you want you can simply inflate or deflate a little.


#315206 Underwater photography - The professionals

Posted by MortenHansen on 25 August 2012 - 03:28 AM

There is one way to get a lot of money out of your expensive uw-photo-gear: Sell it :P

- Morten

#312183 Can I use Inon O-ring grease on Sea&Sea sync cord?

Posted by MortenHansen on 05 July 2012 - 05:48 AM

Good point- I have Inon strobes myself and as you I do use a little extra silicone grease on them to make sure the o-rings don't 'bind' :)

I guess it depends on which o-rings we are talking, I think for the main housing o-ring there will not be a risk of 'binding' since its a squeeze-fit between o-ring and a straight surface, at least on my Aquatica.