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About Mr_Mike

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    Southern California High Desert
  1. Why not make it "digital photoware". You could then have a webpage with great shots from the stuff you sell.
  2. There is no other manual than Japanese. The housing is not intended for sell outside of Japan, and thus, is grey market to others. That said, this is the best "manual" you will get. http://www.marscuba.com/instructions.html
  3. ALso.... Hot water would likely damage the ring. If you were to try this. Boil some water and put it in a bowl and let it settle down. Place only the edge of the step up ring in the water. Since its aluminum, no need to soak the whole step-up ring. It will heat up fast enough. After about 20 seconds, try to remove the ring. If not, another 20 seconds or so. After that, the ring has expanded as much as its going to and will be conducting heat into the rest of the lens. DO NOT soak the entire lens! Besides, you want the lens to be cool and the ring hot. WD-40 will probably not help. Next time you install the ring, use a little silicone grease. And a little less hand pressure.
  4. But the lens comes off the camera, right? Put the lens in a bright sunny spot for an hour or so. Try to take off the ring. Put the lens in the fridge for an hour. Try to take off the ring. Use a rubber strap wrench. (or leather belt). Wrap around the step up ring and use that for extra leverage.
  5. A poll without relevance or context? I should think that we would question why? Essentially everyone that I dive with are NAUI and most shoot stills. I fail to see why NAUI/PADI is relevant to photography? Photography was never a topic of discusssion during openwater class. Safety wise or otherwise. Its fine to be curious, just give us some idea of what you want to know. We are plenty talkitive.
  6. A: doesn't matter B: Both C: Why are you asking?
  7. Additionally..... Thanks for the reference to Christo Lube MCG-111. Apparently used in Scuba Regulators because its compatible with the o-rings and is O2 safe. Don't know what else the lube is compatible with (Yet). Not too expensive either. This would make a good "universal" lube as well if it is campatible with a wide selection of materials. I will look further... I also found out that some regulators use Viton seals. This makes sense since Viton works well at cold temperatures. Viton is also much more expensive.
  8. Whats a MSDT? I know what a MSDS is, but that wouldn't have the info one would require. They are safety related. I would care about what I put on my dive light. Those o-rings can be pricy too. You minimum isn't minimum enough. There is a standard for this type of testing, but I haven't read it in a number of years. The equipment required isn't excessive, but unless you have test lab, its not worth getting. Also, the testing is slow. Months to get data that you can use in long term aging studies. If Parker says "this lube is compatible with pretty much everything" I would be confident in its use. But, like I said, I haven't got that far in my research yet. Obviously OLY probably won't be forthcoming with info, but other manufactures like ikelite may be more helpful. Generally most of these o-rings are buna-n, just because its cheap and does the job. The only really odd one is the new OLY o-ring, and that is likely either silicone (as advertised) or flurosilicon. Silicone absorbes petroleum products (i.e. grease). Flurosilicone not so much.
  9. Still works in macro mode. Still works with add-on macro lens. Basically its a useless function underwater unless you have the tetra housing and can use a hardwired flash. That does work in supermacro mode. That doesn't make the camera a non-starter. You have a 4 Mpixel C-3020 for $450.00. Not bad.
  10. You are correct that we do not know the exact elastomers used in the o-rings. I am familiar with the Parker O-Ring catalog as it sits on the shelf in my office (though its a little old). I have ordered the current catalog just to get the latest. Parker does have a lubricant that is compatible with buna-n, silicone, flurosilicon, etc. It should work with anything. "Destructive" testing is too involved. You need to do absorption testing, durometer testing, strength testing as a minimum. One should weigh the odds of changing to a "universal" lubricant with the odds of having two or more lubricants in your kit and using the wrong one. I have one lube for the flash, one for my dive lights, another for regulator parts, and another for the camera housing. I like the idea of striving for one universal lubricant. I would not recommend this approach to others unless they feel comfortable pouring through engineering documents. I have not yet made a decision to go this route yet, but am looking into it. One thing is getting a usable quantity of lube. Parker sells this stuff in a two ounce tube. This would last a lifetime for a boat load of divers. I would want to repackage it in a dive kit size in a watertight container. Don't know the price yet or the best way to buy. Got to find a distributor if I get serious.
  11. Thats interesting since they haven't done that on earlier models. But I see no difference in specs.
  12. It seems like its identical to the 4000. Since the web site doesn't list a 4000, maybe OLY is using different numbers in different markets, or the Japanese language is denoted the 4100 and the english is the 4000. Don't know....
  13. No problem. I have exacally that setup.
  14. Even though I'm an engineer I would not be proficient at designing a camera housing. Just because an engineer is degreed in a field, doesn't mean they have expertise in a particular sub-field. The same degree is equally used by hydraulics designers and steel fabricators. Though, I wouldn't use a hydraulics designer to design big steel. I have some passing knowledge of pressure vessels and o-rings. I can do light engineering of these things. I would have to dig deep into my mind to be confident on the details. My big interest right now is "why do we need two o-ring lubricants". OLY recommends one grease for buna rubber and a different one for silicone rubber. I think I can get a single lube for both. Then, you don't have to worry about contamination between your strobe o-rings and your housing o-rings. Incidently, you don't know if the OLY o-rings are silicone rubber or flurosilicone either. And you can't tell by the color since color is not standardized across the industry.
  15. You got a press release? Whats difference with the C-4000? The specs you show are identical to the 4000. The supermacro function on the 4000 turns off the flash because the flash is obscured by the lens at 2cm. If so, you cannot use slave flash.
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