I have given you some info regarding PS camera in the other thread.
If you are interested in a more advanced compact like the Powershot G9, then you probably should consider spending a little bit more to get the Ikelite underwater housing with their TTL compatible UW strobe system.
The advanced compact gives you more manual control. For many of the underwater photography and for optimal operation with some strobes, you will usually set the aperture to f/2.8. The G9 comes with IS and has easy access ISO and shooting mode adjustment dials, which are nice and convenient features to have. It also accepts SDHC and can shoot in RAW. But like all small cameras, the image quality is not that great in low light (and this is true for pretty much all non-DSLR compacts). And if you want to take advantage of a better strobe system with TTL, then you will need to get a more expensive housing (like the Ikelite) and TTL strobe system. If you just get the cheap strobes I mentioned in the other thread for PS cameras, you probably won't notice a big difference compared to a PS camera. But this may push your spending over $1000 US, and you will still get subpar images compared to D-SLR. So then you have to think about whether you should upgrade to an entry level D-SLR which is just a little bit more than the G9, with significantly better low light performance. The D-SLR underwater housing is also just a little bit more than the G9 housing.
The choices are confusing at times. But to put things in perspective, let me say what I think. For a lot of scuba diving enthusiasts, we spend a lot more money in the scuba equipment than photography. Most people own their diving equipment for many obvious reasons. My scuba diving equipment (including mandatory certification courses) costs more than $12,000 US for non-decompression type of diving. And unless you do a lot of local beach diving, diving trips cost thousands for a week per person if you want full service with an expert lead diver in the local area. So the camera is a small expenditure compared to diving. Your choice of cameras are PS camera, advanced compacts or D-SLR if you want digital. PS cameras are easy to handle and operate, and relatively cheap when using just the manufacturer housing and cheap strobes. If you want better image quality, then D-SLR with a good TTL strobe system is superior. The advanced compact is something in between in terms of price but the quality is quite a bit short of D-SLR, especially when you are mostly shooting in low light condition underwater. On land with optimal daylight, the advanced compact probably looks pretty close to D-SLR. But in low light condition, the D-SLR will shine way over the compacts. So to me, the choice is basically going for a cheap PS camera for fun, or a D-SLR with quality strobes if you are serious about UW photography.
But if you want the Canon G9 for your general use, it is a good and power packed compact camera. You can certainly use the G9 like a PS camera for diving, and use the cheaper manufacturer housing and 3rd party strobes. But the image quality will probably not significantly better than a PS camera. Here are the specs of the Canon G9:
I've now been persuaded by family and review to instead of getting a compact camera get a slightly larger camera that is a lot more expandable with a lot more room for growth. I've now selected the Powershot G9 as a prime candidate and would like to ask a few questions.
- What is the video recording like at the highest resolution?
- Does it support SD HC cards up to 8gb?
- How many minutes of video (at highest resolution) or full quality photos can you fit on an 8gb card?
- I would probably buy a canon wp-dc21 housing to use underwater whole scuba diving. How would I go about lighting my scene using it if the inbuilt flash is not enough?
Thanks in Advance
Message was edited by admin to remove personal name