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Member Since 01 Feb 2010
Offline Last Active Yesterday, 01:14 AM

Posts I've Made

In Topic: Nikon 1 V3

14 March 2014 - 12:20 AM

I have recently used their AW1 underwater while snorkeling,  Worked great at 15 fps, with tack sharp focus. Can't wait to see the new v3 with the cx 70-300mm for topside wildlife. a Housing could make this a great UW camera. Light weight and less bulk than a dslr system.

In Topic: Major frustrations with a new D800 Focus seems soft

26 December 2013 - 02:16 AM

There is a lot of variability in the D800/D800E sensor performance that appears to be a combination of alignment and sensor manufacturing issues. You can test your sensor with reiken focal which will give you a map of all 51 sensor points. I went through 4 bodies before I found one with good sensor performance. What you want is good IQ with minimal change across the sensors.

A quick way to check your fine tuning is to use a tripod and target, focus with live view (AFon only, disable shutter focus) then when in af fine tune, adjust the settings till you get focus confirmation. for the full description of this technique see dot tune. http://www.fredmiran...m/topic/1187638


Usually you have 10 days to evaluate the camera with a refund/exchange possibility.

In Topic: Dive Destination while recuperating from shoulder surgery

15 November 2013 - 02:57 AM

Recuperation times really depends on what is done to your shoulder. Figure a minimum of 6 weeks to allow healing of incisions and suture points. Good physical therapy will help range of motion return sooner after surgery.

The big problem is unexpected strain on the incisions and suture points before they heal. Second problem is theoretical decompression alterations in tissue ongassing and offgassing that could increase the risk of DCS. I dove 6 weeks after my shoulder surgery on a liveaboard without any problems (the shoulder was still a bit limited in mobility, but no increase in pain)

Best shoulder surgeon is Andrews in Alabama. Good luck.

In Topic: Nikonos reborn

22 September 2013 - 03:13 PM

It would be nice to have a lightweight d800e with lenses that is waterproof to 10ATA without a housing. One day......soon????

Tired of 45 pound carryons.

In Topic: The open circuit to closed transition...with a camera

08 July 2013 - 06:20 AM

I totally agree that on a closed circuit system the lack of making bubbles will allow one to get close to fish and make photographic encounters better.

But there are deaths associated with closed systems mostly from shallow water blackouts (hypoxia) and some from oxygen toxicity seizures.  These are not infrequent case reports of experienced rebreather dives who die.  The incidence of rebreather deaths has gone up yearly since 2000 (DAN fatality surveillance data).

Yes you can get closer, but have to watch your depth changes carefully as either oxygen or diluent is added to adjust the concentration of oxygen in the counterlung, this can result in  changes of bouyancy that have to be compensated for by losing air from the loop on ascent and adding gas to the loop on decent. I agree that it should be good for "static" subjects and challenging for more mobile ones. Reliable oxygen analyizers and CO2 monitors are needed to make this safer. It is fairly safe as long as you are obsessive and compulsive about setup and use, but malfunctions do and can occur. When in doubt....bail out.