I'm going to be picking up the GH4 in the new Nauticam housing and I'm looking into lens options for video (topside and underwater). Because I will be using this for travel, I'd like to keep it to as few ports/domes as possible. I need some advice, especially on how to optimize ports and extensions to keep travel size down so ports/domes can be put to multiple uses. Sorry for all the questions! Maybe I should split them out into several posts.
1. For wide angle work, I think I prefer the look of the 8mm fisheye to the rectilinear lenses for more "dramatic" shots, especially with the 2.4x 4k crop. My understanding is that this lens only works in the Nauticam 3.5, 4.33 and Zen 100mm domes (not the larger 6 inch dome, the 170mm zen or new 180mm Nauticam glass dome. Is this correct?
2. Can any of the small domes (Nauticam 4.33"/Zen 100mm) be used with the 9-18 or 7-14 using extension rings (and diopeters?) I'd like to minimize my travel kit.
3. Are there any issues with using the 8mm for video with a 2.4x crop aside from finding enough lights to evenly light the scene? What angle of coverage would the 8mm have with the crop? Basically, it would behave like a 19mm fisheye on full frame/13mm on APS-C?
4. Would you recommend the 7-14 or 9-18 for wide-angle rectilinear video?
5. I will probably also pick up one of 12-35, 12-40 or 12-50 for topside use? Are any of them (more) useful for underwater video? I'm thinking of potentially using them for establishment shots (wide->medium->narrow) when filming macro or for shy sharks, fish portraits.
6. Does the 12-50 do anything that the 12-40 couldn't? Seems like macro on the 12-40 is almost as good -- but how about port compatibility? Which domes/ports would the 12-40 work with?
7. For macro/super macro, I will probably pick up the Olympus 60mm. Any point in also getting the Panasonic 45? Or would pairing up the Olympus with the 12-50 make more sense?
8. Assuming I choose to go with the 60mm & 12-50, any disadvantages to housing them in the dedicated Nauticam 12-50 port vs the 60mm port?
9. What wet diopeter should I combine with the 60mm for super macro? I understand that in 35mm equivalent terms, it's already 2x -- so I would get twice the magnification I'm used to from the 105mm on Nikon FX for the same size "print" or display. In fact, with the 2.4x 4k crop, it's going to be 2.4x equivalent magnification, yes? Is adding a Nauticam SMC way too much? Does the depth of field became unusable for macro video work?
10. What tripod/steadying solution can be used for macro video?
11. For those who already have the NA-GH4 housing, what's the buoyancy like? My NA-D800 was almost perfectly neutral with a dome, but the RX100 setup was quite negative with wet lenses. Does the GH4 need to a number of floats?How should they best be configured to keep the system steady for wide angle video?
12. I will probably get the Atmos Shogun as a monitoring/recording solution once it's out and there's a housing for it. In the meantime however, are there any housed monitors larger than 4" that can be used with the GH4? Or is the DP4 in Nauticam housing the best current solution if all I want is a monitor?