I am thinking of the Khumbu trek, but will probably do several
given my time available.
I can't give you any specifics about the Everest area treks, I've trekked a couple of times out of Pokhara. There's no real problem finding power on the Jomsom trek.
I'd take the Khumbu/Everest/power question to
http://www.lonelyplanet.com - the Thorn Tree is their forum section - do a search and post on the Indian Subcontinent Branch. People there will know whether you're likely to find power. Pay particular attention to Nepali Ann if she answers you - she's good.
Solar option: Brunton makes solar devices (
http://www.brunton.com )
I took a look at the Brunton charger. Their 'AA Battery Saver' will charge a set of 4 AAs in "12 hours of direct sun".
I live with solar power, I have lived with solar power for the last +
-15 years. Twelve hours of 'direct sun' means that you keep the panels pointed right at the sun for 12 hours, not sort of at the sun as the panel bounces around on your back, goes in and out of the shade as you round hillsides, etc.
My guess is that you might get a set of four charged in three days or so. So maybe if you were willing to strap 3 or 4 of these to your back....
Storage: I was planning on just culling my pictures as I went
along, then downloading to CDs.
Culling is the Devil's way of making you sample a bit of Hell prior to checkout.
First, you can't tell what's really bad from the LCD on a digital camera. Think about how often you look at a thumbnail, can't tell much about what it is, open a larger version to find it to be a fine picture.
Second, how many of your memories do you really want to toss?
So, let's do some math. Don't hold me to the actual numbers, do some research and firm them up for your final decision.
My 2 meg camera at medium compression takes .5 meg shots. Guessing that up to a 5 meg camera let's assume 1.25 meg files per average shot. That's about 400 shots per 512 meg card, 800 per two cards.
I find that I shoot 'not that many' while actually trekking. But I get carried away when I hit a village. I also bracket a lot. 150 shots per day is not uncommon for me. With 2 512 cards I could trek a week or so.
Burning to CD when you get back to KTM is quite doable.
But. You will be paying around $150 for a 512 card. You can get a 10 gig PHD for around $100. That's 20 times the storage for 2/3rds the money. And PHDs are neither large or heavy. Think VHS tape. Maybe a bit heavier when you add batteries.
Pixels: I am thinking of them in part as another zoom. I probably
won't make prints more that 5x7, but if I have 5mp I can crop
images and still have good quality - right?
Right on that one. A good five meg digital will hold its own with a 35mm film negative at 8"x10". That mean that you can throw away about half the pixels and still get a film quality 5"x7". Actually you'll probably be happy with a shot where you throw away even more. My 2 meg camera makes great 5x7s.
Specific cameras: I would love to have a tiny camera, but the zoom
is probably more important to me. Questions on specific ones...
Minolta D7 (I can't see why I would want the D7i, am I missing
something there?) I have heard that this goes through batteries
like water but it otherwise looks great.
You might want the 7Hi because the 7i has been discontinued, harder to find and the 7Hi is only a few dollars more expensive. Do a search on
http://www.pricegrabber.com .
The D7Hi will take around 260 shots on a set of 1600 mAh batteries (Phil's test - check the review above - Cameras - Minolta - D7Hi - Timings and Sizings page). You can now get NiMH AAs rated at 2200 mAh. That should give you 50 - 75 more shots per charge.
And. You can get disposable lithium AAs that should give you 3x - 5x the amount of shots as NiMH batteries for $10-12 per set. Let's say an easy 1,000 shots per set. I don't like using disposables, but in special circumstances....
Lithium batteries do hold more power, will take more pictures per charge. But a second battery will be pricey. And rechargeable lithiums sometimes die after a year or two.
Sony 717 What is with the memory stick (reliable, stores enough?)
and are all Li ion batteries about equivalent?
Sticks are a problem. I don't know if they have released big ones yet. Nor do I know the price. I'll leave that digging to you.
Nikon 5700 Also looks good, pricey.
Pricey and may have some problems in low light. Read the reviews and visit the Nikon Talk forum for good info.
Olympus C750 again the card question, what is a xD picture card....
I don't know how large a xD card you can get. If you go with a PHD then card size is not much of an issue. I carry enough cards to get me through the day, download at night to PHD and reformat the cards.
Honestly, I'm looking seriously at the D7Hi, I may go up to the soon to be released Minolta A1 if it is as good as it seems. The A1 seems to be the camera that best fits my needs, except that it doesn't use AAs, which I like for travel.
But, don't take my opinion all that seriously. Look around, visit forums, read reviews and make your own decision. Most digitals on the market today make great pictures once you learn to use them.
The chore is to find a camera that best fits your personal needs.
--
bob
Latest offering - 'Two Hours in Delhi'
http://www.pbase.com/bobtrips
Shots from a bunch of places (esp. SEA and Nepal).
Pictures for friends, not necessarily my best.
http://www.trekearth.com/members/BobTrips/photos/
My better 'attempts'.