bvanant

Dave: If you see one for sale, let me know. Bill

I am looking for a gently used Reefnet Subsee +5 diopter. I know you have one in a drawer somewhere. Thanks Bill

Nothing weird on my end. A lot depends on what you want. The goal for classical fluorescence spectroscopy is to have no overlap between the excitation and emission spectra. Dichroic filters are what we use in the lab, cheap plastic blue PVC might work but you will miss a bunch of emission stuff that is close to the excitation spectrum. You can get dichroic filters from all kinds of science places like Thorlabs, Edmund, etc. but they get more expensive the bigger they are. Bill

Best bet is https://firedivegear.com/product-category/underwater-excitation-filters/?srsltid=AfmBOoq2VLqnwIP-w6R4v6TwUzK5REVPVIyEsSat8Oty7SOH245XDsQ2 they have all kinds of excitation filters. Cheap ones won't work. BvA

It is interesting that you get "better" image quality with the MFO and the OLY 60. I tried that combo and couldn't really tell the difference even shooting ISO charts in the pool. Glad that it works for you. Bill

At the moment (Aug 29, 2025) IFO does not have ordering info for any of the Asahi fiber due to uncertainty in the whole tariff world. But if you call you might be able to get some. Bill

As of last week, IFO has no ordering info on multi-core fibers due to ongoing tariff silliness. You can call and get some but no direct ordering. Bill

I think for the AOI, the port and lens will be a bit cheaper than the MFO-3 plus flip adapter. I use the 30 a lot and can shoot relatively big things if the water is clear. On our recent Sea of Cortez trip I got some nice sea lion shots with the 30. Bill

I would think that 2 o-rings are there for redundancy, but it is hard to understand how it would leak unless both were small. Bill

If you are not going to edit then it really doesn't matter, you are basically using it to talk to external drives that you will download later. If you are going to edit then get a bigger drive. The 512 drive is like $200 more than the 256 (which is robbery, 512 GB SS drives are like $30). But if you dive a lot say 100 dives per year and you keep it 5 years then the per dive cost is 6500 Rupiah or about 40 cents. Bill