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Phil Rudin

Member Since 25 Jan 2005
Offline Last Active Yesterday, 04:12 PM

Posts I've Made

In Topic: Olympus E-M1 vs E-M5ii for underwater

27 November 2015 - 02:08 PM

I have reviewed both of these cameras for uwpmag.com and those reviews can be found in the back issues section. Since these reviews both cameras have had significant firmware upgrades which have added additional features to each camera.


I still think that E-M1 is the better of the two cameras, it is more robust and has better speed in all areas although not by much. Apples to apples the Nauticam NA-EM1 housing has more features built-in to the base housing cost, such as included hand grips, front and rear vertical triggers for front or rear auto focus control and more.


Both Housings will use the same ports, gears and extensions for the listed lenses so the cost differences are in body (both in about the same price range at this time) and a $400.00 difference in the cost of the housing until you start adding to the E-M5 II housing.


Regarding waiting, I would rather be shooting now. A new E-M1 (II)  is likely to be announced at Photokina in September 2016 for release in the first quarter of 2017. 

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

27 November 2015 - 10:42 AM

Hi Mark, Regarding A fisheye lens for the Sony E mount A7 series what I said is that a fisheye would be a welcome addition not that one exists. 


Regarding the A7R II with the Sony FE 28mm F/2 lens, Nauticam has now released the WWL-1 conversion lens which makes the 28mm a 130 degree AOV lens without the barrel distortion of a fisheye lens, see this thread for more information, http://wetpixel.com/...866#entry367586


I would not recommend the Sony fisheye converter for the 28mm F/2 over the WWL-1 or at all for that mater on a high MP camera like A7R II. 


All of the FE 90mm macro photos were taken using S-AF, ISO-200, F/ 11 to 14 at 1/250th and yes full frame is quite unforgiving when it comes to sharp focus. I am beginning to learn how to move the focus points around within the frame and hope to have greater success with pinpoint focus going forward, may also need to shoot at F/16 and above to increase DOF still learning this system. 

In Topic: Nauticam NA-A7II w/a port/lens choices

27 November 2015 - 09:52 AM

Mojo, It seems that a bit of misinformation has been put out by some that have used the WWL-1 in advance of its release. First I don't see anything within the release that nauticam.com put out about the WWL-1 that would suggest it is a fisheye, (semi-fisheye whatever that is) lens. It appears rectilinear to me throughout the Lumix G 14 to 42mm zoom range at all distances and above water. Second is that the assumption was made by some that the lens would only work at around the 28mm setting on all lenses, it has been designed to work through the entire zoom range of the lenses for which it has been tested. The lens can do close focus wide angle as it will focus all the way to the dome glass with all compatible lenses at the widest end of the lens. Comparing to Tokina 10-17 on a APS-C DSLR is just not apples to apples because the Tokina is a fisheye lens. My choice would be for the extra zoom/focus dial.


Dreifish, Being able to use the Sony FE 16 to 35 zoom behind a 180mm port onA7/A7R full frame v. a 220/230mm dome with the same lens on full frame DSLR with as good or better corners is an upside for mirrorless.


I have not yet tested the WWL-1 with the A7R II and Sony FE 28mm + WWL-1. The angle of view with this combo is 130 degrees and will focus all the way to the glass which sounds excellent for U/W work. I think on the Sony A7 II/A7R II that the WWL-1 with the 28mm F/2 will win out in most cases including ease of travel. For split images the 180mm port will win out and at times having a greater zoom range will be an advantage.


Again comparing a M43 camera and lens to full frame is not apples to apples and I could make an argument for both systems based on Cost, size, image quality and a host of other features. At present the WWL-1 only works well with the Sony A7 line and the Sony FE 28mm F/2 lens, so no zoom at this point.


Regarding image quality I think that both the Sony 16-35 and 28mm are the high quality needed for a large MP camera like the A7R II. The 14-42 zoom is good for its cost but image quality would not match the Sony system.



Images are examples of the Lumix G 14 to42mm zoom on the Olympus E-M1 in the Nauticam NA-EM1 housing with the prototype WWL-1 at different focus lengths, observe that no fisheye effect appears to me.


You should also checkout Peter Rowlands review of the WWL-1 lens in the current issue of UWPMAG.com, this is a free PDF download. Peter is shooting with a Panasonic M43 system and has tested the lens while doing video.


Close focus at 42mm, ISO-400, F/7.1, 1/160th, Sponge at 14mm, ISO-100, F/5, 1/60th, Shark at 22mm, ISO-400, F/6.3, 1/200th and above water at 22mm, ISO-400, F/18, 1/320th.

In Topic: Nauticam NA-A7II w/a port/lens choices

26 November 2015 - 08:58 AM

Hi Mojo,


For the FE 16-36mm zoom you can use the N100-N120 extension ring which has a focus dial and a 120mm X 50mm extension or Nauticam now offers a 180mm port that has the 100mm opening. This port would be used with a 30+50mm extensions direct to the housing and you don't get the second focus/zoom dial.


Regarding the WWL-1, it is a water contact lens which does not require a port. The photos show the one piece lens attached to a Nauticam NA-EM1 housing. NOTE that this is an early prototype lens which I was testing back in February and the design has greatly changed over the last few months, so not the same mounting system or final lens.


I have attached a photo of the 90mm port on the Nauticam NA-A7/A7R II housing and a link to the part.


Photos of the prototype design for WWL-1 and a Shark photo taken with a Nauticam NA-EM1 housing using the Lumix G 14-42mm zoom at 25MM, ISO-400, F/6.3, 1/200th. You will see the the lens is not a fisheye and does not bend lines.


Also attached is a cavern photo using the Sony 16-35mmm at 16mm with the Sony A7 II in the Nauticam NA-A7II housing, Nauticam 180mm optical glass dome port, ISO-400, F/5.6, 1/125th.







In Topic: Nauticam NA-A7II w/a port/lens choices

25 November 2015 - 11:34 AM

I shoot the Sony FE 16-35mm zoom with the recommended 180mm port with the same results you would expect from the same focus length lens on a DSLR with a 200/230mm port at the same F/stop value.


The Sony A7R II with its high resolution is unforgiving with less than stellar lenses like the Sony fisheye adapter lens on the Sony FE  28mm, the 28mm alone is great and the much better choice would be the small flat port with the new Nauticam WWL-1 wet lens which has a rectilinear angle of view around 130 degrees with the 28mm on the Sony full frame system.


The WWL-1 can be used across several platforms from consumer compacts and M4/3 to Sony full frame with a verity of different port lengths depending on the lens and system used. This system is a compelling upside for mirrorless full frame V. DSLR's with large 220/230/250mm ports for lenses with an angle of view less than 130mm.


The proper port for the Sony FE 28mm lens with the Nauticam NA-A7R II is contained in the attachments.