ianmarsh

Just buy one for fun… they are super cheap. Before you know it you will have a canera system built around it!!! Thats how we roll around here!

Tim Yes, i will follow up ian

John Ya... I hear you.... On the up side, I was contacted by a young guy called Will Greene, who is a keen scientist working on coral reef preservation and restoration at the Perry Institute in the Bahamas. https://www.perryinstitute.org/staff/will-greene-bsc/ He needed some help getting the Nikonos 15mm working on his digital set up, so he could use it for underwater photogrammetry, GIS and 3D modelling of reefs. With perseverance we (he) was able to get this sorted out, and is out there busy trying to make a difference. He is the kind of guy we need on our team. I don't know if he is amongst our ranks, but it would be great if he could post an article on what he is doing out there in the blue. Ian

The point about showing people the changes is crucial, but we may be the only ones who care. The sea looks like it always has from above.....

Beautiful edit... and as others have said, the lighting is perfect. I will also add, the music suits the atmosphere perfectly as well! Very thoughtful. ian

Welcome aboard, sailor:)

Yeah Rick! I made it off the bottom! Sea Horse now!! Job done.

Fantastic!!!

Hi Eric, I watched the Tiger Beach/Jim Abernathy Netflix episode on "Tales By Light" again recently, and it reminded me of what a vibrant community Wetpixel was, and how far it had fallen. When you mentioned your early adoption of digital imaging underwater, it reminded me how many of us stand on your shoulders looking forward. Welcome aboard WaterPixels! Ian

Reflecting on what has gone down, I can't help feeling a bit sad for Eric. Eric is such an intelligent, forward thinking, charismatic, honest person, who built Wetpixel from the ground up. To have Wetpixel go down in flames the way it has is not fair to his legacy. I do not want to dwell on the negative, but feel the community should hoist a pint to Eric. I would like to recognize his role in the whole process that has gotten Waterpixels to where it is right now. Ian

I bought a beater 15mm Nikonos UW to see how it ticks. It is elegant in its simplicity compared to modern lenses. To work on it you need a small philips, small flat blade screwdriver, and an adjustable lens spanner with points. This is a specialty item, and available on Amazon. Don't try and remove the front glass without the proper tool... you will fail. Really only the control shaft "o" rings need to be replaced. These can be sourced on the internet from a fellow in France for a few dollars. The three big "o"rings behind the front glass and the acrylic window are not really "o" rings but compression gaskets. In order to replace the shaft "o"rings you need to strip the lens down to its underwear. That is, completely disassemble the lens mechanically. This is not hard, but take photos and make notes as you go. Be carefull not to damage the large gasket "o"rings, you will have to reuse them. THEY ARE NOT AVAILABLE ANYWHERE. Some penetrating oil on the retaining ring (with the engraved writing) for the front glass is wise, but not much. Same for the tiny screws holding the shaft knobs on. These can be a deal breaker if corroded on. You may be able to sacrifice a 28mm lens for its knobs and screws. Also be really careful removing the six spring loaded screws at the back. If you strip these you wreck the aluminum body of the lens. Same goes for the six philips screws that hold the front lens element /sunshade to the body. Corrosion can be a problem with these screws. Remove the 2 control knobs with six TINY set screws. These may have a coat of laquer over the heads. They are super delicate. Remove the front glass retainer first. Don't ding the glass.. you can't replace this. Remove the front half (Sunshade) with the six philips screws. These are 2mm x 4mm. I replace these with SS socket head cap screws which are available at a bolt supply house, likely special order. Remove the six rear spring loaded screws with a small flat screwdriver. These are delicate. Remove the front lens element inside the dome with a lens spanner. That will allow the main optical body to slide out the back. I believe the knobs must be set at f/2.8 and infinity for the control tabs to line up and fall out. I recommend vinyl gloves when handling the optics to keep grease off them. Dismantle the inner mechanics completely down to the back wall of the housing. Work slowly and photograph or make notes of this. When you get to the back wall look out for a tiny spring and ball that sits in a recess and provides the click for the aperture scale. Push the control shafts back into the housing and remove the 'O'rings from the outer seat. Note which shaft goes where, as they are different lengths. Clean everything of old grease. I used alcohol wipes to do this but DON'T LET ALCOHOL TOUCH THE ACRYLIC WINDOW. It will wreck it. Reassemble: Use Nikonos grease on the new shaft "o"rings. The shaft is passed through the housing and "o" ring and the knob replaced pushing the gear from the inside. This is why you cant just replace the "o"ring from the outside. I use a tiny coating of white lithium bicycle grease ( I like Campagnolo) to lubricate the mechanicals, but only a trace. Reassembly is the reverse of disassembly. Take your time and it is actually fun. Use a thin layer of Nikonos grease on the "o" ring gaskets, just until they are shiny. Any locktite inside can be replaced with a dab of nail polish or touch up lacquer. Make sure you get the right knob on the right shaft, or you'll be tearing it apart again (I did). Use a small drop of laquer on the screw heads of the shaft lockscrews and note the orientation of the screws relative to the flats on the shaft. The screw positioning is assymetrical. When you replace the six screws that hold the front element/sun shade, watch the orientation of the shade. It goes with the sun shade projections at the 12 and 6 oclock position. Place the lens face down and preload the body with a bit of downward pressure as you tighten the six philips screws or the SS socket head capscrew replacements. This takes a bit of the load off the threads as this is a delicate area, and may have some corrosion already. Also I use a tiny bit of Lanocoat on all external threaded fasteners, as well as the six spring loaded screws in the back.. Anyway. That's my experience. No guarantees, but a fun way to spend a winter afternoon thinking about your next trip.

Hey guys These are my "original" PDF's... Hopefully they transfer properly. Also apologies, I spelled Mike Mesgleski's name incorrectly the first time Ian nikonos 15mm service manual.pdf

Hey Tim... so glad you and the lads were able to pull this out of the rubbish-bin. Well done!

Congratulations on your efforts, Chris. Glad to have you at the helm!

So glad you're here!!

This has attracted a lot of interest over the years, with some useful info that is difficult to find. Can this thread be copied over and pinned if there is interest? The manuals are really not available anywhere. I got them from Mike Megleski. https://wetpixel.com/forums/index.php?/topic/54607-do-15mms-need-servicing/&tab=comments#comment-399921

Hello fellow Polyp. I guess we can all thank Adam for that little demotion....

Glad to have somewhere to land. I am so impressed with what you guys have done with this... nice save! I have been on wetpixel since 2012, diving since '72 and snapping photos since the '80's Usually the biggest lesson is the one you learn after you know everything... this will be an excellent website for learning that next lesson. Haven't dived since before Covid, need to get wet soon!