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Member Since 16 Jan 2003
Offline Last Active Today, 01:21 PM

Posts I've Made

In Topic: Fisheye with Sony a7Rii

15 June 2016 - 01:25 AM

Yeah - that looks like classic mini-dome problems to me. 


Shows how expensive camera and expensive lens can all be undone by wrong dome. 



In Topic: Nikkor 20mm f1.8 g

07 June 2016 - 08:50 AM

Thank you very much for your replies and advice. I'll use the lens on a d800 body. I was thinking what the ideal f-stop would be to achieve the best compromise between diffraction and depth of field. I hope i could use a little wider apertures using the Sea & Sea corrector



Ideally f/13. However, if you are incorporating a beautiful sunburst in your shot - the lack of f/22 is a severe limitation. 



In Topic: Comparing large domes for FX

03 June 2016 - 11:41 AM

Just as important is positioning the dome correctly.  A big dome, slighting too far from or too close to the lens will perform worse than smaller dome.


The Zen 230 as my dome of choice with this lens. 



In Topic: Nikkor 20mm f1.8 g

03 June 2016 - 12:26 AM

Be aware that you can't close the lens past f/16. There is no f/22. 



In Topic: Red Sea: Brothers Islands or Thistlegorm?

31 May 2016 - 03:21 PM

Depends on the time of year and also what subjects you want to shoot.


I prefer the northern route that takes in Ras Mohammed and famous wrecks. I usually do that twice a year (summer) and then do Brothers/Daedalus/St Johns once a year (autumn/spring).