Gudge

Thanks everyone for the kind comments.

The image is backlit with the strobes pushed well forward of the end of the EMWL objective lens and angled inwards and backwards. The outer surface of the soft coral then acted as a diffuser which created uniform lighting inside the soft coral.

Here's the STL file for anyone who wants to print it. You'll need a 16 x 3mm socket head screw and 3mm nyloc nut to attach it to the lens. Olympus - Canon 8-15.stl

PM sent. I don't have a zoom ring for the 28-60.

When installed there are two things that are installed: It is installed as a filter accessible from the Filter menu that that just processes backscatter on the active layer There is an action which makes a copy of the active layer with a mask which is processed for backscatter and adds another layer called Cleanup which you can use to cleanup the bits that it misses Using the action is the best way to use it.

Another advantage is the longer the focal length the better the bokeh for the same aperture and magnification: I regularly use the Sigma 150 macro underwater and the bokeh with these images is much nicer than i was ever able to obtain when using either the Canon 100 macro or Sony 90 macro. Downsides are that the 150 is heavier and and focus speed is slower than both of these lenses.

Looking at my images taken with the 1.4X teleconverter/Canon 8-15 combination, 72% were taken with the focal length at 15mm and 20% with the focal length at at just over 11mm (vignetting with my combination starts at 11.2mm). My main focus was CFWA on smaller subjects so the lens was used at the maximum focal length of 15mm to achieve the greatest magnification and a look that was as different as possible to that achieved with the 8-15 used without the 1.4X teleconverter. After getting a Nauticam EMWL, I now use this exclusively for CFWA and have stopped using the 8-15 on teleconverter for CFWA. If I'm using the 8-15 by itself and need the extra focal length I just switch my A7RIV into DX mode to give me a usable effective focal range of 15-22.5mm without vignetting and a respectable 26MP image size.

Which 1.4X teleconverter, camera/housing and extension ring size are you using? I have a design that works well with the Sony 1.4X teleconverter and Canon 8-15 and Metabones adapter. The Sony 1.4X teleconverter is shorter than Kenko 1.4X teleconverter, it's easy to modify the design for the difference in lengths and to accommodate the particular housing you are using.

Sold!

Sold

Sold.

Includes: Nauticam NA-7DMkII housing with M16 vacuum valve Canon EOS 7DMKII with total of 31,751 shutter actuations (rated life is 200,000 actuations) Sigma 17-70mm f/2.8-4 DC Macro OS HSM Lens with zoom gear Nauticam to Subal Type3 Adapter Subal DP-FE2 8 inch/200mm optical glass dome port with Subal Type 3 mount Subal 33mm Type 3 extension ring for use with Sigma 17-70mm Lens Subal 20mm Type 3 extension ring for use with Canon 8-15 fisheye or Tokina 10-17 fisheye Spare batteries, chargers, CF memory cards and card reader Canon Wi-Fi Adapter W-E1 (not pictured) Nauticam vacuum pump (not pictured) Spare housing and extension ring O rings and O ring grease (not pictured) Asking AU$2,500 (US$1,650) plus shipping.

Asking AU$205 (US$135) plus shipping.' '

Asking AU$190 (US$125) plus shipping.

Asking AU$250 (US$165) plus shipping. If you are going to use this with the Canon EF 100mm f/2.8 Macro USM lens I'll throw in the Nauticam focus gear for this lens free.