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Edward Lai

Member Since 04 Jul 2008
Offline Last Active Jun 10 2016 05:10 AM

Posts I've Made

In Topic: NIKONOS Cameras 1-5

11 May 2016 - 09:57 AM

Hi Johnqdiver,


I am interested.  I will be in London mid of June so if you don't mind the delay I can pay you the cash then.



In Topic: Photos from Sony RX-100 IV

17 September 2015 - 02:41 PM

Hello Herve,


You really have nothing to worry about the file quality of the Sony RX100iv.  If you download photos from our Smugmug site you can look at the Exif data and find the ISO setting of the photos.  For example the Whale Shark photo (1st one in this thread) was shot at ISO640, and some other wide angle photos were shot at ISO320.  My personal feeling is the files from the RX100iv is even cleaner than the EM5 Mk I.


I can usually use 1 battery for 2 dives.



In Topic: Testing Panasonic 14-42mm with Wet Wide Lens

19 August 2015 - 11:56 PM

Hi Interceptor,


I used the PZ Panasonic 14-42 with a flat port shortened to 29mm.  The macro 35 port will fit very well with the new Panasonic 14-42 mark II, and our zoom gear will be shipping soon.  I look forward to sending you our lens in less than 2 weeks so that you can experience various aspect of this lens personally (sharpness, contrast, close focus and lack of CA/distortion etc.).  Zooming through the lens is no problem.


Would it be fine to send the lens to Alex T and let him arrange local delivery?



In Topic: Photos from Sony RX-100 IV

13 August 2015 - 07:46 AM

I have the whole set of inon lenses with and without domes in there versions that work with the rx100 happy to do some tests if I get a prototype on loan!


Hi Interceptor, that's good idea.  I will arrange a loan lens to you.  The first production ones will be available about 2 weeks later.

In Topic: Photos from Sony RX-100 IV

12 August 2015 - 12:46 PM

Thanks everyone for the encouragement and constructive comments!


I must say that it means a lot to me for what Alex said about the lens and the photos, from someone who owns so many W/A lenses and has such broad knowledge about photography and optics, and has been judge for so many renowned worldwide competitions.  Not to mention having shot and shared so many stunning photos himself.  Alex surely gave me much inspiration during our brief meeting in Milan in 2013 discussing future of underwater optics.


After several years of full commitment in underwater lens design I can say that no single one lens is perfect, whether it is Zeiss or Samyang, for land or for underwater.  So, this Wet Wide Lens is never meant to be perfect.  A good lens design is always a good compromise between cost, size, glasses chosen, complexity and ease of production and quality assurance.  I hope I have found a fine and reasonable balance this time.


For some of the questions:

- when used with the RX-100 IV, I had to zoom the camera lens to around 25-26mm equivalent.

- Haven't compared image quality with the Inon lens.  I hope someone can do that and tell us what he/she thinks.

- Haven't tried the white balance capability of the camera.  All my w/a photos were shot with Magic Filter at sunlight wb and color corrected in post.

- We already tested most versions of Panasonic/Olympus 14-42mm lenses and they all worked with the appropriate ports at all focal lengths.


Greetings from Hong Kong.