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acroporas

Critter Expert
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Everything posted by acroporas

  1. I don't think these are anemones. I think they are very small/young stony corals. Which coral, I have no idea.
  2. The corallimorph, Pseudocorynactis caribbeorum is my best guess. But if that is what it was, it should have had clear tentacles with orange tips out at night.
  3. I used to travel with a small pony bottle. At the time ( the rules on air tanks may have changed post 9/11 ) the rule in the US was that tanks are permitted both checked and caryon(if they are not to large) but MUST have the valve removed. But that was in the US. You'll need to check the regulations for your country and all the countries you travel to/through.
  4. The feathery things are Hydroids, and the out of focus brown bit in the upper right corner is the Coral, Pocillopora, both of which are animals.
  5. Hard to be very confident with the closeup so blurry. But if I must, I'll cast my vote for sand/pebbles/dirt. I see lots of similar looking white specs in the background.
  6. First, when looking for an ID, always post where the photo was taken. Though I don't know if it would help me that much in this case. The mouth reminds me of that of a cleaner wrasse but I did not find any pictures that matched your fish very closely. The closest I found was Labroides rubrolabiatus but it is a bit of a stretch. Hopefully someone else will recognize it.
  7. I don't recognize it, but I'm pretty sure it's not a crab. Either a shrimp or squat lobster.
  8. I can see it being very cool tethered to the camera and used in conjunction with live view - live view on a big portable screen. Maybe if this had come out 5 years ago. But since you can get SD / CF cards that are as large or larger than the amount of storage that will be available on this thing, there is not a lot of point to it... As far as a using it for image editing on the boat. I suppose it's possible. But I'm not sure why anyone would choose this over an old laptop that would cost half as much, be 2x as powerful and would have a keyboard.
  9. My best guess for the cardinals is Apogon monospilus
  10. FYI since he has it in an aquarium, he should know that it is in the scoprionfish faimly and it does have venomous spines (I know, I have been stung by one before, it has a surprisingly potent sting for something that small and innocent looking)
  11. I don't know about you, but when I loose consciousness while diving I very rarely remember to inflate my BCD. Unless the BCD also has magical feature(that would be really cool) that detects when I loose consciousness and can inflate my BCD for me, it will not matter which way I would float unconscious.
  12. I am using a very old vest style BCD by aqualung. I don't know how to rate durability but it is 15 years old and still going strong. What I like about it is that it is small, simple, and unobtrusive. But it could be better. My ideal BCD would be: A very simple/compact vest - No integrated weights, or fancy pockets (simple pockets are fine if they do not noticeably increase bulk, but it would also be fine if it had no pockets at all) with only a minimal amount of lift. A tank is only ~4lbs lighter empty than it was when it was full - 10lbs of lift is really more than enough to control buoyancy though out the dive, though more is fine if it does not increase bulk. - Enough padding that it is comfortable on bare skin. - Metal backplate, latches, clips, ect. Metal for both durability and added weight (weight on the bcd = less weight on the belt). - Dump valves on both the lower left and right. - Bottom left and right corners of the bladder are connected at the bottom so that either dump valve can completely empty the bladder when oriented head-down. - Top dump valve(that is positions so that when oriented vertically it can completely empty the bladder) activated by tugging on the manual inflater. - The end of the manual inflator's clips onto the vest to keep it in position and out of the way. - Big easy to use buttons on the inflator. - D rings all over the place.
  13. So cute....It can't be more than a few weeks old. Sorry, I can't help with the id.
  14. I think your "Anemones" are actually hydroids.
  15. Did you try turning off the IS. I wonder if the the new IS is being confused by the TC.
  16. "Viewfinder gets darker" Sounds like the aperture is not functioning properly and getting stuck partially closed. First I would clean the contacts on both the camera body and lens. If that does not fix the problem, try a different lens on the body and a different body on the lens to determine in the problem is the lens or the body.
  17. I can not say with 100% certainly, but I would be very surprised if it was compatible. I have not heard of anyone besides canon who makes anything for the EFs mount. However if you place the Newest version of the a Canon Branded extension tube between the lens and the teleconverter it will work. The downside is that you will loose the ability to focus to inifinty.
  18. I vote neither. But I am not sure what it is.
  19. This is not "another" way. It is just using a reversed 24mm lens as a large/expensive diopter/close up filter.
  20. Giles, There are really 3 ways to increase the magnification. Extension Tubes, Teleconverters and Diopters. - Extension tubes and Diopters give you more magnification by letting you focus closer. - Teleconverters give you more magnification by increasing the focal length. The big difference is working distance. with a 100mm lens at 1:1 the focus distance is ~12 inches Low lets assume that you want 2:1 magnification. If you use a 2x teleconverter to get to 2:1 magnification the focus distance is still 12 inches. Or if you use extension tubes or diopters to achieve the same magnification, the focus distance will be much less, perhaps 6 inches. The shorter working distance makes it more difficult to sneak up on the subject, and makes it more difficult to light. So then on to extension tubes vs diopters. They both do pretty much the same thing, they increase magnification by decreasing the minimum focus distance. The bigest functional difference between the two is which lens they work best on. Diopters work best on long focal lengh lenses, while extension tubes work best on sort focal length lenses.
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