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Phil Rudin

Member Since 25 Jan 2005
Offline Last Active Today, 10:36 AM

Posts I've Made

In Topic: Which Bulkhead for Nauticam A7RII housing?

01 February 2016 - 07:38 AM

I have been using the Nauticam flash trigger with fiber optic cables and Inon Z-240 strobes. The flash trigger has a very fast recycle time and a very long lasting battery. 


Be aware that all of these flash solutions Nauticam, Ikelite and Nikonos work in manual flash mode NOT in TTL. 

In Topic: Looking for input on dome for 8mm Olympus in Nauticam housing

27 January 2016 - 09:03 AM

The Olympus 8mm fisheye can be used with several ports on Nauticam housings including  the ZEN 100mm optical glass port with 30mm extension, Nauticam 4.33 acrylic port with 20mm extension, Nauticam optical glass port with 17mm extension and ZEN 170mm optical glass port with no extension. 

so the first question would be how much the smaller size will matter, do you require optical glass or acrylic and what other lenses will you be able to use with the port.


For example the ZEN 170mm is an excellent port that can be used with a verity of other M43 lenses, the ZEN 100mm is also an excellent port which may support the needs of many who want to shoot CFWA because of its small size. 


The Nauticam 140mm is also an excellent choice.

In Topic: More magnification ....

20 January 2016 - 10:32 AM

This is a standard test for the Olympus 60mm macro, manually focused to 1:1 all photos taken by "rocking" the camera to obtain focus.


#1 photo is the setup tapping a bill to a 35mm slide mount and onto a window for back lighting.


#2 is 60mm at 1:1 17.3mm on the long side


#3 is using a SubSea +10 C/U lens. Image approx. 13mm on the long side.


#4 is using a SAGA +15 C/U lens, as you can see at +15 the image is 8mm on the long side I don't know how much more magnification you need.


The Nauticam CMC-1 is by far the best C/U lens for the 60mm macro at apex. 8.65mm on the long side.



In Topic: Macro with the A7R II & Sony FE 90mm macro

15 January 2016 - 08:20 AM

Hi Brent, The Sony FE 90mm macro is an incredibly sharp lens. Like most Zeiss lenses it is heavy glass. My conclusions have been that the AF works quite well above and that below water sharpest focus is achieved when going manual focus from about 1:3(2.5) to 1:1. This can be accomplished with rear focus by AF and then rocking the camera or by using a manual focus gear. Keep in mind that full frame apples to apples with sub full frame has shallower DOF at any given F/stop so smaller focus range. I used the same technique with M43 cameras below about 1:2 so not much difference in that regard. For video I would be going full manual. I hope this helps.

In Topic: Olympus M.ZUIKO DIGITAL ED 7‑14mm 1:2.8 PRO and PT-EP12

09 January 2016 - 10:56 AM

Olympus makes a port adapter for PPO-E04 for the Olympus OMD camera housings, EP-08, EP11 & EP13 which have a larger port opening to fit the diameter of the 7-14 lens with a zoom gear (a gear which I don't believe they have not yet released). The diameter of the PEN housing port openings appears smaller and I don't think the lens and gear will fit.