scuba-s

I don't think you will have a problem. I had a custom port made by Ikelite years ago to accommodate the Sigma 150mm macro with a 1.4 converter. I have used this port with other configurations. The main risk is for the lens to see the reflections of itself cast on the inside of the port. I have used this very long custom port for the 105 Nikkor which leaves considerably more space in front of the lens and have never seen any issue. I believe the angle of view of lenses over 100mm is too narrow to be a problem.

thank you for the reply just as i suspected 100mm would have to narrow field of view to be a problem but had to ask to be sure ,better sure then sorry as they say,thanks again

That is a great review! It answered a lot of my questions. Thank you for sharing this information.

i recently purchased the 5 inch dome and have used it with the tonkina 10-17 and 1.4 converter and it works like a charm with nice sharp corners and i love the low profile of the 5 inch compared to the ikelite 8 inch dome,makes a big difference when you are in a bit of current, it is a great affordable alternative to the zen mini dome as ikelite are yet to come up with a high quality mini dome for the CFWA or WAM area

I hope you don't think the GH2 focus speed is like the G12. They are not even close to being in the same class. Here is what DPReview said about it.

The camera features the world’s fastest*3 level Light Speed AF of approx. 0.1 second*3which is achieved by reducing the detection time for focusing by doubling the drive speed from 60 fps to 120 fps. Not only the accuracy but also the speed excels that of the high-end DSLRs with phase difference AF with the advanced contrast AF system in DMC-GH2.

DPReview Preview of the GH2

the GH2 may beat a DSLR in liveview AF but the DSLR is streets ahead when it comes to normal viewfinder mode AF ,which is what the vast majority of divers with DSLR use ,give me the viewfinder any day

I am looking to "downgrade" from my 7D to something smaller, more travel friendly and overall a less expensive rig.  I do not shoot my 7D or DSLR on land, so this is purely an underwater rig, hence the decision to downsize.

As I have lens/ports for Canon lenses with the Nauticam housing, probably looking to stay with Nauticam and get either a 550D or wait and see what the GH2 looks like.

Anyone with experience with both the 7D and 550d have any comments/comparisons?  I am quite familiar with the different specs on each camera, but more interested in experience with shooting underwater.

The GH2 looks like it could be a very interesting option for an even smaller rig, and the video is pretty stellar - although I am def more of a still shooter and in that regard I would guess the 550d is a better still camera.

Or do you think I am crazy to "downgrade?"  Haha.

hi i am perplexed why you would want to go from a 7D to a 550D as the difference in housing size would not be that great and it is only part of what you have to take when you travel eg:-ports,strobes, strobe arms,lens,battery chargers, the list goes on,it seems an expensive exercise for little gain, you have a good housing with the nauticam, i have the 7D and am very happy with its performance underwater,why go with something less when you have something more already

I'm not sure where to put this and can't really find any recent posts concerning this topic, so ...

In the past I carried only snorkeling and camera gear.  Now, I am considering buying some SCUBA gear for travel. I am looking at a BCD, regulator, octopus, sausage and anything else someone could suggest.

I do have my snorkeling gear and a computer with wetsuit.

As far as a BCD ... I am looking at Cressi Travelight BCD, Oceanic Biolite (which is so new I can't seem to find any feedback on it), and anything other's can suggest.

Any fora that could be recommended to research lightweight travel gear?

Thanks,

i have the dive rite tranpac  bc with travel wing it weight is a little over 3kg and is compact and can be used for everyday single tank diving i use it with 100cu and 125cu tanks no probs and unlike other travel bc made of very hard wearing and long lasting material