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Iankelso

Member Since 05 Mar 2013
Offline Last Active Mar 30 2013 01:05 PM
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Posts I've Made

In Topic: OMD - Olympus or Nauticam housing advice

16 March 2013 - 02:19 PM

Thanks for your reply, Girelle.

The reason I asked is that I have the Olympus housing and port ep08 with the macro lens adaptor. This is basically a lens cap with a hole drilled out to take a 67mm thread which vignettes quite badly with the 14-42 Olympus lens unless you zoom in to about 22mm on the lens. When I add my Inon WA adaptor which has a 0.6 magnification factor that only takes me back to 13.6mm widest so no field of view advantage of using the WA adaptor in the first place.

I've tried the 12-50mm lens in the Oly housing (without zoom gear but using the function button for zooming full wide and full telephoto). It has a fantastic range for general use from reasonably wide scenery to full head shots of sea horse and closer with dioptre. It doesn't vignette as badly but the net gain in angle of view while obvious is tiny so barely worth the effort.

So that's why this thread is fascinating for me.

I'd love a little more angle/field of view. Alex reports only 2mm loss of wide angle range due to vignetting on the nauti 60mm port with a dioptre lens so if this is the case, and I know it might not be the same with the WA adaptor, then 14mm x0.6 WA adaptor gives 8.4mm rather than 12x0.6 =7.2 which means a significantly increased angle of view over the 12mm without the WA adaptor due to the flat port under water.

Does all this make sense? Can someone try it out? It would be good to know before I sell my Oly housing in favour of the Nauti...

TIA

Ian

In Topic: OMD - Olympus or Nauticam housing advice

14 March 2013 - 03:40 PM

The 60mm port with the 12-50 inside plus dioptre looks like a fabulous set up for general use. Would the port take an inon 67mm Wide wet lens or is that asking too much. Also type 1 or type 2?

TIA

Ian

Ian