Jump to content

Phil Rudin

Member Since 25 Jan 2005
Offline Last Active Yesterday, 01:06 PM

Posts I've Made

In Topic: Wide Angel on E-M1 in Nauticam Housing

13 April 2015 - 09:03 AM

Rugani, Regarding your 8mm shot where the lens shade shows in the corners I will give you my take on the issue. I had the same problem with a much larger port made by Athena back when I first started shooting with the Olympus E-300 and E-330 cameras with the Olympus 7-14mm zoom for 4/3 (not M43) cameras. All of the dome shades were designed for cameras that use the 3:2 format, as in 35mm or APS-C. Since the 3:2 image is not as tall (0n the short side) as the 4:3 image the hood would show in all four corners of the taller (4:3 aspect ratio) photo. I resolved the issue by shaving off a bit of the hood. I addressed this issue with Athena and they later revised the hood so that is would not vignette with the 4:3 aspect ratio cameras.


Regarding the 7-14 zoom with the same port, One size does not fit all WELL and results will vary greatly depending on the port you use with this lens. I see people shooting macro with ports where the macro lens sits 10  or 12mm back into port to save money and then wonder why they are not getting the amount of magnification they thought they would be getting from their +10 closeup lens.


Inon makes great products and it appears that the 115 dome is an excellent choice for the 8mm but not so much for rectilinear lenses like the 7-14, 12-40, 9-18. I still think the best choices for these lenses are the ZEN 170mm port and the Nauticam 180mm Optical glass ports.


The Hammerhead is the 7-14 zoomed to 20mm at F/6.3 and the cave entrance is at 7mm and F/5.6. This lens has great DOF and I have no problems shooting in a range between around F/4.5 and F/9 all the time with executable corner sharpness. I don't want to get into yet another debate about the corner sharpness of this lens but it is as good or better in that area than any of the rectilinear I have seen tested at the 114 degree angle of view range.



In Topic: Panasonic 8mm + Zen DP-100-S3 + PA-N85-S3 = dome petals visible in photo?

16 March 2015 - 01:19 PM

I have attached photos of your port configuration (top view) the ZEN DP-100-s3 + PA-N85-s3, the ZEN DP-100 port for the Panasonic 8mm, the PA-N85-S3 adapter ring and the DP-100-S3 port.


The DP-100 is a combination of the 100mm port with a Subal type 3 mount and the PA-N85-S3 extension with a Nauticam Mini mount.


The DP-100-S3 is a combination of the 100mm port and a different Subal type 3 mount which mounts to Subal housings for Fisheye lenses that are longer than the Pana 8mm.


Your port configuration and the DP-100 for Panasonic 8mm look different to me, two distinct seems where the O-Rings are rather than one. So the ZEN DP-100 has the visible O-ring on the PA-N85-S3 adapter and a second O-ring where the adapter and port connect. Your port configuration looks like it has three O-rings rather than two.


Bottom line is that if your port extends further from the housing than the DP-100 port it is going to vignette. 

In Topic: Panasonic 8mm + Zen DP-100-S3 + PA-N85-S3 = dome petals visible in photo?

15 March 2015 - 12:31 PM

Can you post a photo of a side view of your port system when it is installed on the housing? I have never had any of these issues with the ZEN 100 port for Subal type III and the Panasonic 8mm on my Nauticam NA-EM1 housing.

In Topic: Wide Angel on E-M1 in Nauticam Housing

14 March 2015 - 07:33 AM

EspenB, read my port in the thread you started regarding this issue.

In Topic: Olympus 7-14 mm f2.8 will not fit in Nauticam housings

14 March 2015 - 07:31 AM

EpsenB, I think you are over reacting at bit regarding the issue of the new Olympus 7-14mm F/2.8 zoom. Nauticam has a 85mm to 120mm extension with a zoom control allowing you to use the 180mm optical glass dome port (120mm on the housing side) with the current mirrorless Mini housing line. After the adapter is mounted the lens is installed from the front of the housing and then an additional port extension and the port are installed over the lens. This works well for lenses like the Olympus 12-40 zoom and the Zeiss 12mm on Sony NEX and A-APS-C series housings. The zoom gear would be operated from the extension and not the housing zoom dial. I am sure that ZEN Underwater will also have a port solution for this lens going forward. The issue will be to determine the amount of extension needed for this lens. Olympus 12-40 and Panasonic 12-35mm use 20mm of extra extension, Panasonic 7-14mm no extension, I would expect Olympus 7-14mm be be in the 20 to 25mm range if this system does in fact work. The 85 to 120 extension would actually work with any of the ports with the 120mm port mount so you could in theory go to a 230mm port if you wanted with the correct amount of extension. The extension part number is 36052 on the Nauticam port chart.