Nikkor 10.5mm fish eye

Has anyone had the opportunity to use one of these underwater and if so, what are your thoughts?

Cheers,

Colin

Colin, you might try search....there have been several recent posts about this lens

Karl

I have only had a chance to try the 10.5 twice in the last couple of weeks. It is a sharp and close focusing lens. I am very happy with it so far, however I have just been free diving with it so we haven't been deep enough to really find out it's full range of capabilities.

Splash,

Donovan

I have some picture with this lens with my Aquatica AD100. I´m happy with results. It´s likes a 16mm in full frame camera but there is more distorsion with 10.5mm than 16mm

http://www.pbase.com/image/28539319

regards

Mauricio Andrade

www.pbase.com/mandrade

Thanks guys; great images Mauricio! Gives me a good idea of the U/W perspective. I have the lens + D70 but no housing as yet so mine has only seen topside use. Another question: Nikon Capture 4 has a function to perform fisheye to rectilinear transformation with this lens (the software recognizes the lens type). Has anyone found this to be useful?

Cheers,

Colin

Hi Colin,

The "rectilinear transformation" or de-fishing works well, but in my opinion it is of little use underwater with the fisheye - because there are few straight lines down there anyway. IMO an underwater photographer wants the widest possible lens (and de-fishing reduces the angle of coverage), and a bit of distortion isn't usually a problem.

One time you might want to de-fish an image is say for the interior of a wreck or for mosaicing images.

Alex

Hi Colin, thanks for having visited me. The de-fishing of Nikon Capture 4 works fine. Below I have two pictures. In the first one I used de-fishing method and other didn’t.

http://www.pbase.com/image/28539322

http://www.pbase.com/image/28567682

Note that in the first image there is a little crop and the subject is more distant than second. This method is useful to crop strobe lights that appears in the corner of 10.5 fish eye shots too.

regards

Mauricio Andrade

www.pbase.com/mandrade

Thanks Alex for the explanation and Mauricio for the examples. Reduced coverage is evident in the images shown. I was also wondering whether and in what circumstances using a flat port as opposed to a dome would be useful for such a lens; would be any advantage in situations where one wished to reduce coverage slightly. My current experience with wideangle comes from the flat wetmate 100 degree Inon lens (with Oly C5050Z).

Regards,

Colin

You should NEVER use a flat port with a lens this wide. The CA and corner bluriness will be HORRIBLE. In fact, if I had to predict, I'd say if you put a fisheye behind a flat port, onle the center 1/4 of the image would look ok.

I have read that flat ports are acceptable for lenses with a field of view narrower than a 28mm lens (35mm equivalent).

Cheers

James

Cheers

James

James

Thanks for clearing that up for me. Am on a new learning curve here. It's the value and diversity of members' experience that keeps me coming back here for more!

Cheers,

Colin