shokwaav

Just visiting, but couldn't resist getting a few dives in! I actually think it's a bit positive, I had a full set of floats on the 90mm flat port for the first day of diving and it kept pointing upwards, then I took a few off and it was still trying to point upwards. Unfortunately I didn't have time to test it in the bathtub before I went on this trip, so I don't have a more accurate measurement.

A few other shots of different sized subjects. The MFO-3 was quite enjoyable to use. However, I plan on 3D printing out a bumper ring to protect the lens from bumps and scratches. I've already acquired a lot of dents on the side of the lens from the rough exits in Sydney's dive sites. Luckily the glass seems to have gotten off scratch free. Separate post because I reached the file size limit.

A weedy seadragon at The Steps, Kurnell, Sydney. Shot with the MFO-3. I think it's a perfect lens for this size of subject. Tracking worked well with the A7CR, and I was able to track the eyes of the seadragon with the animal autofocus. There were a few times when it decided to focus on some of the particulates in the water, but it was rare. 1/100, f9, ISO200. Sony a7CR, Sony 90mm Macro, MFO-3, 2x Backscatter HF-1 strobes Processed in Lightroom, Backscatter removal with BackscatterXTerminator

I have a pair of Tech shorts that can fit the hard cap. Lesson learned after I lost one underwater. Some people on this forum have drilled a hole through the cap to attach a bungee or bolt snap.

That looks great! I designed a simple snoot for the HF-1, but I haven't had the chance to try them out underwater.

How Ryo Minemizu captures the hidden wonders of the ocean at night Some great photos and information about his setup.

I'm considering doing either this, or taking apart the lens and removing the focus ring. Not sure which would be the easier solution!

I'm actually on a N100 system, but I'm using the N85 4"wide angle port as Nauticam no longer make it in the N100 version. On even further inspection, there's I think the focus ring is just a bit too wide, and there's also a small bump on the lens which is preventing the lens from going in. You can see the little nub just underneath the label about the minimum focus distance.

My #36137 N85 4"wide angle dome port finally came in and big disappointment for Sony shooters - the 50mm macro can't fit in the N85 opening. Annoyingly, that's quite a bit of money down the drain. EDIT: actually on closer inspection, I only need maybe less than a millimeter extra diameter for it to fit.... I'm wondering if I could widen it with something like a dremel...

I've never heard of this dive site in Okinawa! Do many dive operators do this dive? I'll have to come back soon.

I have the same issue, I believe it's due to the Shorts format. I think once you get past 3m, you're limited by resolution. I thought about getting a 360 camera for B-roll, but decided against it because the quality of footage you get is nowhere near an action camera.

https://www.instagram.com/p/DK_xxybR0oS/

Unfortunately it's only manual focus.

https://www.dpreview.com/forums/post/61105226 This can help explain why .TIFF files are so large. Simply put, they are uncompressed.

My experience with air bubbles between the port and the wet lens is that it usually appears as tiny dark spots on the image, but otherwise doesn't really affect image quality. I do make a habit of "burping" my lens every time I enter the water. Sometimes it's also needed when you go through another diver's bubbles. I also believe that the MFO lens may only really improve the sharpness at the edges of the frame, by correcting for chromatic aberrations from shooting through a flat port. So crops of the corners may be helpful.