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Phil Rudin

Member Since 25 Jan 2005
Offline Last Active Today, 08:21 AM
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#389337 Shooting Experience - Oly 30mm vs. 60mm Macro Lenses

Posted by Phil Rudin on 12 November 2017 - 09:49 AM

First of all the topic is shooting experiences with the Olympus 30mm macro V. the 60mm macro lens. The issue with the Olympus 30mm macro is VERY limited working distance and the port you are using. With my Nauticam NA-EM1 II the 45 port is recommended. In that port the front of the lens is about 10mm from the outside of the port glass leaving a working distance of about 10mm between subject and port at 1.25:1 or maximum magnification. Using say a plus 10 closeup lens would reduce the distance to 5mm plus the thickness of the CU lens would leave little to no working distance. In addition the CU lens would be at least 10mm from the front of the lens which would reduce the magnification of the lens because of the distance between the two lenses. Also the Olympus lens is already a 1.25:1 lens which at 1.25:1 is about the same amount of magnification as you would get with your Panasonic lens at 1:1 plus the ULC-165 wet lens. This is assuming that your lens is closer to the port glass on your housing. With the very best placement your lens at 1:1 plus the the Inon UCL-165 would get you to about 1.3:1.   

 

For subjects the size of a Pigmy the 60mm macro is just the far better choice and at 1:1 you can use about +25 of magnification in front of the lens before the working distance becomes to limited. This would give you magnification of about 5:1 or a subject about 3.5mm on the long side.   




#389285 Mini Flash Trigger Nauticam #26309 for Gh5

Posted by Phil Rudin on 10 November 2017 - 10:49 AM

On Olympus you can not over come the 1/250th sync. speed and my flash trigger works fine with single fiber cables. The problem is with the cables not the flash trigger most likely.




#389284 Shooting Experience - Oly 30mm vs. 60mm Macro Lenses

Posted by Phil Rudin on 10 November 2017 - 10:42 AM

This again is a bit like comparing apples to oranges. The 30mm has twice the angle of view and twice the depth of field V. the 60mm at the same F/number. The 30mm does not work with closeup lenses because of the close focusing distance while the 60mm works quite well with +5 to +25 amounts of magnification. 

 

This is a bit like comparing the 7 mm end to the 14mm end of the Olympus zoom. Both work very well for what they were designed for. I look at the 30mm as a 1:3 or greater size lens while I look at the 60mm as a 1:3 or smaller size animal. If I am looking to do super macro 60mm is my choice Fabio's which are all in the appox .1:3 or larger range the 30mm works great. For an under $300.00US lens the 30mm has excellent image quality and is easer to use because of the wider angel and greater DOF. 

 

I find the 30mm to be an excellent black water lens because the 60mm is a bit difficult to focus while I and my subject are both moving. 

 

Bottom line is I would own both if you can afford to do that because they simply don't replace each other.

 

Photo is from a black water dive and the subject is a little larger that a US quarter, Larval Stage Sea Anemone, 30mm, ISO-200, F/7.1, 1/250th sec, two Inon Z-240 strobes, Nauticam housing and 45 port.

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#387004 Nautical Mini Flash Trigger for Olympus (#26306) on a E-M5 mk.I?

Posted by Phil Rudin on 26 August 2017 - 02:34 PM

E-M5 has the wedge in the front half of the housing (to deploy the onboard strobe if you forget) which would prevent the flash trigger from fitting into the housing. The E-M1, E-M5 II and E-M1 MkII all use the taller removable strobe that does not require the wedge to pop it up. I use the Nauticam flash trigger with my NA- EM1II Nauticam housing. With the camera set to C-AF TR and Sequential High setting I can hit 18  properly focused frames per second using my Inon-240 strobes at about 1/4 power in manual. It is quite impressive and beats many of the much higher cost full frame cameras.




#384526 SONY A7R II / A7 II, FE lenses and more.

Posted by Phil Rudin on 30 May 2017 - 06:55 AM

Yes and it is on the list near the bottom. Last photo is the 16-35mm F/4 with the gear installed. you can contact me direct at tropicalone@bellsouth.net




#381865 Olympus EM1 II and Nauticam NA-EM1II housing review

Posted by Phil Rudin on 01 March 2017 - 10:20 AM

My review is now posted in the new issue of uwpmag.com, this is a free PDF download.

 

 

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#380578 Anyone have experience using Sigma MC-11 Adapter?

Posted by Phil Rudin on 13 January 2017 - 01:58 PM

The Sigma lens compatibility charts don't list the MC-11 being compatible with the Sigma 15mm fisheye or with any Sony or other full frame lens wider that 35mm. As a result I chose the Metabones and Canon 8-15mm zoom with the ZEN Underwater 100mm port with the removable shade for my Nauticam A7R II housing. No vignetting but a bit soft at the edges as would be expected with such a small dome port. I have also used the same combo with a ZEN 200mm port and I don't see much of a difference. You can find some images on my Phil Rudin Facebook page. I also have Sony equipment for sale if you would like to send me a PM.

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#378664 Dome Port Confusion

Posted by Phil Rudin on 10 November 2016 - 02:08 PM

I know this may seem a bit confusing but first lets revisit your numbers. If you look at the current Nauticam port chart the 12-40 is listed with a  47mm 85-120 port extension and the Olympus 7-14 is listed with the 55mm 85-120 port extension plus a 10mm extension. That makes both within 2mm of each other at 67mm for the 12-40 and 65mm for the Olympus 7-14. I would expect either configuration to work with both lenses and the 180mm port.

 

For the ZEN 170mm port as you say the distance for the 12-40 is 60mm and the 7-14mm is 80mm for the port which is 170mm.

 

This is what you have not factored in, FIRST the Nauticam 180mm port glass sits in a port mount which has about 15mm of extension from the mount to the start of the glass while the ZEN 170mm port mount is about flush with the glass. This difference adds the additional extension for the Nauticam port. SECOND is that the distance from the point of lens to the spot where the virtual image begins is calculated for a zoom lens at its widest angle of view. So 7mm and 12mm. As the 12-40 lens extends to a greater length the dome begins to act more like a flat port as you get close to the glass. Since the 12-40 is about 84mms before being extended and the 7-14 is about 105mm and has internal focus rather that extending is needs to sit further from the port than does the 12-40mm. Because the Nauticam 180mm dome is wider the 12-40 can sit a bit further away from the glass than with the 170mm port. The extensions lengths are about the same but the ZEN port has a flat 120mm opening into the port while the Nauticam port has the same 120mm opening but then angles out preventing vignetteing with the overall longer port. If you look at the two photos you can see the ZEN 200 port on the extensions and the Nauticam 180mm port on extensions with the housing sitting on the tanks.

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#378445 Canon EF 8-15mm F/4 Fisheye review

Posted by Phil Rudin on 04 November 2016 - 10:05 AM

My new review for the Canon EF 8-15mm F/4 Fisheye, full review is a free PDF download at uwpmag.com.

 

 

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#376652 Sony A6300/Ikelite & Zeiss 18 mm reviews

Posted by Phil Rudin on 02 September 2016 - 10:45 AM

My new reviews for the Sony A6300 with Ikelite housing and the Zeiss 18 mm with Zen Underwater 200 mm dome are now posted at uwpmag.com. This is a free PDF download with lost of great articles and reviews.

 

 

 

 

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#376586 Sony Releases Full-Frame FE 50mm F2.8 Macro Lens

Posted by Phil Rudin on 31 August 2016 - 06:19 AM

I expect this lens would be attractive to those shooting Sony APS-C cameras like the new Sony A6300 at half the cost of the Zeiss Touit 50 mm F/2.8. Also as a fish portrait lens for Sony A7 series full frame shooters. 




#376500 Sigma MC11 + Sigma 10mm fisheye = on Sony A6000... Your opinion plz ?

Posted by Phil Rudin on 28 August 2016 - 02:22 PM

MC-11 and the fisheye are not compatible on the APS-C or FF Sony cameras.




#374547 Nauticam Compact Macro Converter

Posted by Phil Rudin on 14 June 2016 - 12:37 AM

Hi Alex, The SMC was basically designed for full frame and the CMC was designed for sub full frame and works the best with M43. This is the C/U lens that would be my choice for M43. CMC and CMC-1 are the same thing. 

 

The problem with the C/U lenses is that many people use the lens before they have reached 1:1 with the 60 and other macro lenses. As a result I see images of animals much larger than the 17.2mm X 13mm life size of the m43 60 macro lens. So as Bill has said in the hands of someone who knows how to use the C/U lens you can get excellent magnification but many are using like a placebo only think they are getting higher magnification. 

 

These are images I have posted here several times, the configuration is EM-1 60mm macro manual focus to 1:1 (life size) then move the housing until in focus. First is the 35mm slide as a frame of reference, the 60mm life size and then 60mm at life size plus CMC. As you can see a very small final image taken a less than 10mm and very shallow DOF. Most people are not getting this close even when they use a C/U lens.

 

So you can see full frame life size and the final eye image and make your own evaluation of how close that comes to 7:1 magnification.

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#374128 A7R II and FE 90mm Underwater -- first dive with Sony

Posted by Phil Rudin on 30 May 2016 - 06:48 AM

I have found that this lens becomes more user friendly after a few outings. I use the 0.5 to 1:1 focus limiting setting when using the lens as most of my subjects of choice seem to fall within this range. I also use the Nauticam SMC-1 with this lens. I will be using this equipment in the Philippines next month along with the new Zeiss 18mm and a Canon 8-15mm fisheye zoom.




#373302 Are people leaving micro four thirds?

Posted by Phil Rudin on 04 May 2016 - 01:55 PM

Hi Tom, I was skeptical also but had several chats with design teams from two major manufactures of dome ports and both confirmed that the flange distance, in this case about 22mm rear lens element to sensor for Sony full frame mirrorless and about 42/43mm for Can/Nik FF DSLR does in fact make a difference with lenses of like angles of view. The result is that smaller domes can be used with mirrorless cameras with the same sensor size as a DSLR and still achieve like results.