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Marsh

Member Since 19 Nov 2011
Offline Last Active Today, 10:17 PM
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Posts I've Made

In Topic: a6000 lens for underwater + underwater case

Today, 10:19 PM

Mark,

 

Apparently the new Zen DP170-N85-II is a glass version of Nauticam's 7" acrylic dome. What I liked most about the original 2 part DP-170/S&S-Mini-port adapter set-up is it's ability to accommodate wider lens (physical diameter, not AOV) such as the Z12 or even the upcoming Sony FE 90 macro, since one can use S&S extensions and macro ports.

 

Zeiss contacted me today and said my modified Z12mm is back from Germany and will be here by weeks end. I'm anxious to see how it works in my 4.33. I also have a 20mm extension, so I may see if I can put a diopter on it somehow for CFWA in the 4.33 or 7". This might help with the corner sharpness problem often encountered with rectilinear WA's in a high curvature compact domes.  As it is, the Z12 has a rather short minimum focusing distance of 7", so it will be interesting to see how it functions with corner sharpness in a compact dome. What I don't know is how a low power +2 diopter affects AOV when used with a WA rectilinear? Can anyone explain that to me.  

 

I'm not all that hopeful to be honest that the 4.33 will work, but no one has really tried it. So, I'll give it a whirl before putting my 4.33 and Sony lens combinations (S16, WA and FE converters) up for sale. It's comforting to know, however, that a step up to a 7" port will work if the 4.33 doesn't fit the bill.  Plus,  I'll use the same method (as my 4.33) to modify my Port 72 swing mount to fit the 7" wings and have a nice versatile single dive scouting lens with WA and macro capability (w/ Aquatica +10) when using the Z16-70.  Good to hear the Z16-70 IQ looks good and sharp underwater. 

 

Should I get the compact 4.33 to work with the Z12, I plan to add my 20mm extension to the 4.33 to use the S18-55 for a single dive lens (it's length fits perfectly, but I haven't tried it out yet to see if it actually functions). I have a pretty good S18-55 copy and am fairly happy with the results in my flat Port 72. I'm hoping the dome will reduce the chromatic distortion, along with a wider AOV. This all is a cost effective approach to my limited budget.  In time, I see myself with the new N/S&S mini-port adapter, a DP-170 and S&S macro port using the Z12, Z16-70 and Sony FE 90-M lenses on my NEX7. Like you said, it'll only be a little larger rig to transport than my current 4.33 set-up.  Maybe even around the same size when I get rid of my Nauticam C-60 macro port, Metabones adapter and Canon 60 EF-S macro. 

 

I guess I'll find out how this all pans out within a week in my hot tub or nearby pool. LOL.  It'll be late spring or maybe even fall before I return to the Philippines with my Filipina wife to dive. 

 

Cheers,

 

Marshall


In Topic: a6000 lens for underwater + underwater case

26 December 2014 - 09:20 AM

Hey Marc, good to hear from you.  

 

Looks like I'm not the only one futzing with NEX. I must say you take the trophy for creativity in that regard!  One of the nice things about the DP170 and adapter system is the ability to experiment.  I'll keep your ideas in mind as I move forward.  I'm keeping my fingers crossed on the Z12 w/ 4.33, but not all that hopeful for the curvature reasons stated.  The decision to go with either the N7" dome or the DP-170 will follow and your information points to the latter for creative purposes. With a combination of S&S ports, one can experiment with a # of lens that otherwise would never fit the Nauticam mini-port system, even on the macro end.  The 2 part Canon 60 port I bought is quite wide and around the length of the announced Sony 90mm macro being released sometime in early 2015.  I'm sort of hoping it might fit the port, since there's extra room without the Metabones adapter and the reported dimensions look promising.  If not, I guess we'll see what Nauticam comes up with or possible configure something with the DP-170 set-up, something I'm sure you will explore. :-) 

 

Cheers,

 

Marshall


In Topic: WANTED: Nauticam 7" Dome for NEX

25 December 2014 - 04:24 AM

Bump..still looking.


In Topic: a6000 lens for underwater + underwater case

23 December 2014 - 08:32 AM

I shoot a NEX7 in a Nauticam housing and absolutely love the ergonomics and Sony 24MP APS-C sensor. The A6000 is even better at focus, etc at a lower price point. As you're seeing, many of us NEX users are still struggling with lens and ports for a high IQ compact underwater system, which is why we went with mirrorless to begin with.  The Zeiss Touit 12mm has been rated as the sharpest lens available underwater, going beyond Canon and Nikon SLR's.  Yet as Marc has pointed out,  it normally needs an expensive 2 piece dome and adapter to work due to it's physical width.  However, what many don't know, is the bell shaped shell on the lens is cosmetic or functions solely for the lens shade mounting.  The lens is fully functional without this outer shell allowing it to fit in the Nauiticam NEX 4.33 and 7" domes.  My Z12 is in Germany at the moment having the front cover (which hides the shell mounting screws) removed (it's glued on).  Zeiss has been great and agreed to remove this cover for me at no charge other than shipping it to their NY service dept.  

 

I will soon be able to experiment with the lens in the 4.33 compact dome.  This is a FE (fisheye) dome and not ideally suited for wide rectilinear lens due to the dome's extreme curvature, so I may lose corner sharpness, but I don't believe anyone has tried it "real world" yet.  I'll soon find out when the lens arrives.  Should IQ suffer from the 4.33 dome curvature,  the Nauticam 7" dome will work perfectly, but unfortunately, will add to the size of the compact system for travel. Yet, the good news is it's less than half the price of the Zen DP170 & adapter ($550 vs $1,200) and much lighter. It also will not require the 2 part dome/lens installation that Marc explains above.  

 

I'm hoping it will perform in the small 4.33 for travel purposes and also because I have a 20mm extension which will allow me to use my S18-55 lens in the 4.33.  I've figured out a way to adapt my Port 72 flip macro mount to the 4.33 port and like the idea of still having the kit lens for single dive versatility in WA and M. Again, because of the 4.33 curvature, I may have trouble with the corners at 18mm?  The good news is,  the N 7"dome finally has a zoom gear for the Z16-70 which will be a higher IQ replacement for the 18-55. Putting my flip macro mount on the 7" will be more of a challenge though….LOL.

 

For super-macro I'm using the exceptionally sharp Canon 60 EF-S macro and Aquatica +10 diopter with a Metabones adapter in Nauiticam's custom NEX port which offers some autofocus (slow, but works) and more important for macro, manual focus, which the shorter 50mm Touit set-up does not have. Sony's Focus Peaking is a fabulous tool underwater.  Plus, the added 10mm over the Touit makes the lens longer in 35mm equivalency which is an added bonus, as the Sony "NEX" system doesn't have a long macro. Perhaps Nauticam will make a 2 part NEX port for  the upcoming Sony 90mm FE e-mount macro, but that's a BIG maybe and certainly a long ways off.  90mm on a cropped APS-C body makes a great working distance macro, comparable to the more popular C100 and N105 macros, which are the most popular for SM. I'm sure many NEX macro shooters are keeping their fingers crossed…..

 

If I had to do it all over again, I would have considered the more mature 4/3 system with it's large and sharp lens selection.  Yet, I print large and like the 24MP Sony sensor and can't afford to change systems in mid-stream. Fortunately, Sony's systems are slowly catching up. 

 

Welcome to the expensive world of UW photography.  It's kind of hard to cut corners with cheaper equipment.  Purchasing a used NEX or 4/3 system rather than trying to get a cheap housing to work, is a better option in my opinion.  

 

Cheers,

 

Marsh 


In Topic: FOR SALE: Sea & Sea Dual Sync 5 pin Nikonos Cord

25 November 2014 - 03:30 PM

Reduced to $125 plus $12 shipping to USA.  Will ship internationally for additional shipping cost.

 

Like new, never been used.