Thank you Jon for sharing this, it is very helpful. I also have a Nikon D850 but with Isotta housing. Also have the port for the 60mm lens +30 mm extension ring that I use for the 105 lens. Got the TTArtisan 100mm couple of weeks ago and been trying it on land and dry runs in the housing. The photo of the hermit crab is superb! I have few questions/comments please:
- What lighting did you use behind the hermit crab to get the beautiful bubble in the background?
- I did buy a set of Kenko extensions tubes, and again only tried them on land. They seem to be fun to play with but the depth of field becomes very narrow with every tube added. With the 36mm tube, I measured about 14" minimum focus distance to face of the lens, so a bit longer than yours at 10.5". I could get to 10" only after I piled up all 3 tubes for a total extension of 36+20+12=68 mm. That is probably a bit too much to add and obviously need for extension rings for the port (not sure is worth the investment)
- Did you set your f-stop prior to putting camera into the housing? If so, did you tape the dial?
- For the focus ring, I don't have a focus gear but I was thinking if this can be pre-set as well? For example, set the focus ring all the way to the right, the focus at the shortest distance. That way, there is no adjustments on the camera, other than getting the distance to the subject to be right.
Thanks!