bvanant

The theoretical point that matters is that using a diopter to increase magnification depends intimately on the focal length of the lens. Working distance underwater will depend on the index of the glass in the lens but in general is larger by the water index 1.33. Unlike Interceptor, I think that my testing on land translates pretty well to both the theoretical model and to how a diopter behaves UW. The Olympus 30 mm is in fact one of those that a diopter doesn't help in any way except that you can use a diopter not for magnification but rather for Bokeh considerations. Bill

Diopters increase possible magnification for a subject by allowing you to focus more closely. For most cases, the longer the focal length of your lens the more magnification you can get with a given diopter. For example with a 100 mm macro lens (1:1) and a +10 diopter you can expect to see a 2.1 to 1 meaning for a full frame setup without the diopter you can shoot a 35 mm subject full frame, while with the diopter you can shoot a 16.6 mm subject full frame. Similarly with the 60 macro lens (1:1) and a + 10 you will see a magnification of about 1.5 to one so you now will be able to shoot a 24 mm critter full frame. For a +5 diopter with the 100 you get about 1.5 to 1 and with the 60 you get about 1.2 to 1. All of this comes of course with working distance and DOF considerations as well as lighting issues.

Putting the batteries in the LED trigger is not the way that is obvious. You need to make sure that the little tab that looks like it should be between the batteries is in fact on top of both. Have seen this issue come up multiple times. Bill

You could print a holder, but the pricey bit is the filter which if you could 3D print would be truly amazing

Dichroic filters are expensive; we use NightSea's version for Inon. You can get some bandpass filters that might work but you still have to mount them. There is no very simple plastic filter that will work well, filters for the UV need to be glass or quartz to work reliably Bill

that's what I assumed. Still a good deal BVA

I am using the Asahi-Kasei 613 core fibers that have an OD (with the jacket) of 2.2 mm. They fit fine in the Howshot fiber connectors that I am using. I lubricate the fiber before I put it through the solid part of the adapter but otherwise no issues. Bill

Did you mean 30% of retail price or do you mean 30% off retail price (a significant difference) Bill

That doesn't look like a Nauticam part at least not for any housing I have used. As Bill1946 says, go to your local hardware store and find the size of screw that fits the hole. Then get a stainless steel one (316 is best, 304 is OK). Most likely it is a 6 mm screw size but might be 8. Bill

We have done a lot of testing of prints at various resolutions. In our hands, both Canon and Epson printers have their "best" printing at 360 DPI. We tried from 150 - 720 DPI. After 360 not so much improvement, but big differences from 150 to 360. Even 300 to 360 was noticeable but after 360 not much improvement. Of course it depends on both the photo and the paper you are choosing, but for underwater scenes on Red River metallic papers those were the results. Bill

There are other options, some are free or inexpensive. Darktable appears to be quite nice (learning curve if you are using LR/PS). Luminar is also quite good and only $89. For me though the subscription model is not a big issue, I just skip Starbucks once a week and am about even. Bill

If anyone wants some cable, let me know. I can buy a bunch and ship USPS to Europe for about $29 U.S. Better would be someone in Europe get a bunch of orders together and buy 100 or more meters and parse it out there. Bill

Sold

Won't Industrial ship to Europe? Bill

Industrial Fiber Optics in the States sells the fiber by the meter. Get them to ship via USPS (it should be very inexpensive). Most of the single core fibers will work OK with Inon strobes if you are using the on-board flash. Where they fail is if you are trying to use an LED trigger with Sea and Sea strobes or you want accurate TTL. Cheers Bill