Sony NEX with 8mm fisheyeNauticam fisheye port query
Posted 22 October 2012 - 11:02 AM
How are you finding the differences with the NEX to the D7000?
Posted 24 October 2012 - 07:12 AM
Posted 24 October 2012 - 07:57 AM
Posted 27 October 2012 - 03:42 AM
Sorted it!!!!! RELEASE WITHOUT LNS in MENU SET UP!!woo hoo!
Edited by Scubysnaps, 27 October 2012 - 06:40 AM.
Posted 27 October 2012 - 08:03 AM
6 feet away from corner f/22 I think 1/15 iso100
1 foot away from ornament f/4 1/125 ISO 100
I find the focus peaking very helpful as a guide to move further in or out or not.
No purple haze either.
Lens comes with 3 year samyang UK warranty.
Posted 27 October 2012 - 11:43 PM
I'll do some comparison shots with the Nikon D90 and Tokina 10-17 tomorrow
I'm looking forward to it.
Minolta Dynax 7000i, KonicaMinolta Dynax 7D, sony a100, Ikelite housing for 7000i and sony a100, two Ikelite Ai strobes
Posted 29 October 2012 - 01:58 AM
I'm looking forward to see how workable the combination is in a housing using the hyperfocal method.
I'd like the combination, but if it requires too much stop down, it's an issue for me in my usual very low light situations.
Posted 29 October 2012 - 02:22 AM
I'll try some more with a smaller aperture and infinity focus when I can, maybe tonight
Posted 29 October 2012 - 02:41 AM
...woo-hoo!! waterproof to 30m!
Edited by Scubysnaps, 29 October 2012 - 02:44 AM.
Posted 18 February 2015 - 12:23 AM
Because it's a dome port, it creates a virtual image (the dome port becomes a lens underwater). While it depends somewhat on the lens and camera, you should expect the virtual image with this port to extend from about 10cm to 20cm in front of the sensor; 10cm is for objects touching the front of the dome, 20cm for objects at infinity. Theoretically, you could focus at 13cm and with a large enough f-number have everything from touching the dome to infinity in focus. Except that once you go beyond f/11 diffraction is almost certainly going to soften the images though f/16 may still be acceptable (though doubtful). It may be that focusing at about 15cm at f/11 is just an all around better solution. Some trial an error is likely in order, but if you set the focus at .15m and f/11 and stuff at infinity is soft, then you'll have to adjust the focus closer to .18m. If stuff at infinity is sharp then you can work your way towards .13m.
The lens has a minimum focus of .1m, so there won't be a problem with focus inside Nauticam's 4.33" dome.
But the Samyang 8mm has minimum focusing distance 0,3m so is there any chance to get focused on the virtual image??
Do You know what is distance to virtual image in the 3,5 inch DomePort ???