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Member Since 20 Jan 2004
Offline Last Active Today, 12:35 AM

Posts I've Made

In Topic: What port/extension ring is needed to accommodate 300MM lens

22 June 2015 - 12:57 PM

it was a joke, obviously.... :dancing:

In Topic: What port/extension ring is needed to accommodate 300MM lens

22 June 2015 - 03:50 AM

it is quite obvious, with 300 mm one does not ned to go as close to the object than with a 20 mm lense..... :pardon:

In Topic: External monitor

10 June 2015 - 12:47 PM

I have a Ninja 2 and underwater housing for sale, see this:




pn me if you are interested!

In Topic: Expose to the right?

22 May 2015 - 02:37 PM


I think that with newer cameras, ISO is another exposure control, and this really opens up the possibilities with ETTR. Reichman et al were using this technique for landscape photography with cameraS on tripods, which are not really a viable option for underwater shooting. The fact that we can get clean images at ISO 1600 and beyond now means that this is now viable.





Exactly my opinion!


I used to shoot underwater at base ISO, let's say ISO 100. Today, I usually shoot with ISO 400 or higher. That let me get a smaller f-stop (f11 or smaller), a faster shutter speed (1/125 sec or faster), lower flash output (1/4 power or less, which means less backscatter) and faster flash recycle.


When I was recently in Cat Island for the close-up action of the oceanic white tip sharks I thus was able to shoot 5 images per second (to select the best image and throw away the others in the same series...)


And funny was  -after 1 day of shooting-  the other photographers did the same from the second day on....


What a wonderful world!

In Topic: Cat Island (Bahamas): seeking advice

06 May 2015 - 02:06 PM

I will take both of them, the 16-35mm and sigma 15mm and 2 dome ports, namely the small 4" and the larger 9". I think using the sigma with the 4" dome for snorkeling and using the large dome when diving with tanks. let's see how it goes...

Btw I have shaved the sigma's lens hood as well as the sun shade of the 4" dome port; still there is a small remain of black edges visible in the left and right corners in the image. I guess I will have to crop slightly to get rid of the curtains...