John Liddiard

The Coptic museum has a terrifying collection of circumcision knives through the ages.

As well as boats, you can shore dive the casino point on Catalina. Get a ferry from LA, then you rent a trolley, cylinders and weights from the dive centre. Then take your trolley up to the casino and take yourself diving. There is also a kayak rental outfit where you can rent a dive kayak. This was all >20 years ago, so could be out of date by now. I found one of my articles on the web archive. https://web.archive.org/web/20110710134649/http://www.divernetxtra.com/travel/kayak0600.htm There is another article some where about the shore diving.

I use a Shearwater Predator computer strapped round a strobe arm. Its rarely perfectly the right way up, but is easy enough to read and anything not green gets my attention to rotate the whole rig if necessary. I find I pay more attention than I would to a computer on a wrist. By having nothing on my wrists for warm water diving, kitting up is quick. No messing about with wrist straps. No risk of forgetting anything. Just pick up the camera and jump in knowing everything is there. For cold water the same, except this is my backup. I keep my camera on a leash. I wouldn't do this if I hand-held the camera without a leash, too many risks in one go if I dropped it!

The 'old masters' (artists/painters) used to work in rooms with the window on their left shoulder so as not to shadow their work with their right arm (right handed). Hence a single strobe slightly to left will conform to the historic norm.

My current (ageing) situation is that I need glasses with between +2 and +3 for reading (depending on where I hold the bhook). My distance vision is clear. For diving, I use a Cressi Occhio mask, very low volume and two eyes. I have a +2 gauge lens in the bottom left corner of my mask. For using my camera, with currently un-corrected vision I can see clearly through a Nauticam 45 degree viewfinder and camera EVF with no correction. My problem - while I can see clearly through the camera, my vision is no longer good enough to spot tiny critters before pointing my camera at them. On land, with reading glasses on, looking at anything distant is obviously slightly fuzzed. For underwater, the solution I am considering is +2 or +3 full lenses for both eyes of my mask. Not half lenses or bifocals. My intent is that will give me the best vision for spotting tiny and camouflaged critters. The side effect of a slightly fuzzed distant vision won't really be a problem underwater. The anticipated problem is: will I be able to use my camera viewfinder through such lenses? Can the built in adjustment of the Nauticam viewfinder negate the +2 or +3 I would have in my mask. Does anyone have experience of such, or am I thinking in completely the wrong direction?

As and when I have time, I will do my bit to turn this into the best resource for underwater photographers.