Now, I'm no photographer, so I offer no technical advice and no solutions.
My (cheap) digital camera suffered rather in the extreme light intensity. The high sun reflecting off the white buildings has led to rather washed out photos, as the more observant of you may have noticed.
Take advice - an expensive camera may do it, or you may be reduced to putting your sunglasses in front of the lens.
Luggage and bags:
Carry a light baggage. Your hotel might be on a steep road.
You don't want to carry heavy things under the burning sun here!
Clothing/Shoes/Weather Gear: Depending on the season. During summer wear long cotton dresses or short tops and shorts.
Flat shoes always....the roads can hide traps. It can become slippery in many places.
Photo Equipment: You need the best camera here. Carry an extra battery too.
Camping/Beach/Outdoor Gear: I don't recommend to come to Santorini and go camping. You can find a cheap nice and clean village studio. Locals are very open hearted and you will have the chance to mingle with them and learn more about the island from real locals.
Miscellaneous: A hat and sunglasses always! A bottle of water if you walk.
Avoid carrying documents like your tickets or passports with you. Leave them at the hotel in the safe or lock your suitcase before leaving. Check the door of the hotel if it is locked before you leave. Carry a copy of your passport instead.
Don't carry all your money on you, but carry as much as you think you will need that day.
Luggage and bags:
Depends on how you are getting to the island. I flew from Athens so you are restricted to the amount of luggage you are allowed to check-in. I had a full size, a carryon and a backpack which I kept on my back at check-in, I also used it as a day pack for hiking around the island. Of course you will want to shop a little so make sure to leave room for souvenirs.
Clothing/Shoes/Weather Gear: Shoes: I ended up wearing three out of the seven pairs of shoes I packed. Flat dress sandals which I wore every single night, hiking sandals for the day and flip flops for the beach...that's it. Never unpacked my heels, you'll break your ankle on the streets of Fira and the winding paths.
Clothing - yes you can wear jeans at night, no you will not get funny looks, nobody will say "oh you must be american" A wrap or light jacket for evenings - it was September and the days were hot and the evenings chilly (and windy). There were a couple of laundry places nearby - about 10 euro a load - you drop off in the morning, pick up in the evening. Had I known about these places, I certainly would not have packed so much.
Toiletries and Medical Supplies: Bring OTC meds like aspirin, Tums, Pepto...if it's an unfamiliar environment who knows how your body will react so allergy meds should be packed just in case. Of course bring your favorite shampoo, soap, etc. Most hotels have hair dryers so leave yours at home, email the hotel to make sure.
Photo Equipment: I brought my dslr, two lenses and a digital point and shoot and three 4GB memory cards. Used my dslr for the day and naturally you don't want a bulky camera for the evening so the point and shoot was perfect.
Something warm for the nights, as there is often a cold wind in the morning and at night, especially during spring and autumn.
Miscellaneous: Sunglasses: due to the sun shining on the white houses, your are almost blinded without the sunglasses.
Do not forget your sunglasses: most of the buildings and streets are often repainted in white and it can be really difficult to manage the sun reflection.
A pashmina/scarf can also be very useful, Santorini is very windy and after sunset can become fresh.
Photo Equipment: If you have a film camera, buy films with less than 100 ISO. I used 100 ISO films and unfortunately the colours of my pictures do not reflect the real wonderful colours of the island :-(
Miscellaneous: I should have learned my lesson the first time. I went to Paris and the hotel provided hair dryers in each room. Oh my gosh! Such a low powered hair dryer it was that it took about 20 minutes to dry my hair. Well, no different in Greece. Stayed at 4 different hotels - all providing hair dryers in the room - all of them were pretty bad. So, my suggestion would be to buy a hair dryer for Europe with the correct European electrical plug.
Clothing/Shoes/Weather Gear: Bring a sweater! We went to the Greek Islands in September 18-25 (2007) and would have frozen at night if a greek friend had not insisted we pack a sweater. Even though it was hot enough (some days) to spend a lot of time in the ocean, it cooled off quite a bit at night.
Light long sleeve shirt
Toiletries and Medical Supplies: *Suntan lotion. And come on now ... no more 15spf!! It's pretty expensive here. I bought a meduim size bottle for 16Euro.
Buy your VT clothes before you go! Please see the pictures of the OFFICIAL VT MODEL – Jennystravels. Jenny looks great here, of course she looks great anywhere – that’s why she is modelling VT clothes in Greece! It’s hard to find, but at the bottom of the VT Homepage is a link to order these clothes. Warning! They run 1-2 sizes too small for men.
Miscellaneous: Be careful to pack the right adapters for your electrical items. It seems to always be a problem for me. Though most of Europe probably has a standard outlet, for some reason the stores here just don't have the right adapters for you to take on travel.
Toiletries and Medical Supplies: I couldn't seem to find any budget sunscreen in Greece at all, and being an aussie, I am used to having a great big bottle of supermarket brand block to apply numerous times a day. With that in mind, if you know you can find sunscreen cheap at home, stock up and take it with you, as you will certainly need it in the Greek sun!
Clothing/Shoes/Weather Gear: Because the villages of Santorini consist of narrow walking paths without any access for vehicles, you'll do a lot of walking during your visit. This is even more challenging when you consider that you will also encounter a lot of stairs and slopes in the villages perched atop the volcano rim. Make sure you wear comfortable shoes so your feet can endure it.
Luggage and bags:
pack light! Rolling suitcases won't get you far when all the roads are stairways.
Clothing/Shoes/Weather Gear: If you have fair skin, as I have, be sure to bring your hat, sunscreen, and an umbrella never hurts. A sunburn does.
Photo Equipment: A must.
Luggage and bags:
We travelled with back packs, but in the case of Santorini, I don't think it matters either way. Just be aware that the walkways are often uphill, so go light on your packing.
Clothing/Shoes/Weather Gear: Good walking shoes are a must, but suggest very comfortable sandles, with light cotton shorts and t-shirts or short sleeved shirts. Bring multiple changes of underwear to remain 'fresh', or launder frequently.
Toiletries and Medical Supplies: We found that Santorini offers everything a traveler may require. However, a good quality body talc may be helpful to prevent jock itch.
Photo Equipment: Once again, the shops are well stocked with photo accessories, but expect to pay a premium for these items. Perhaps an extra set of batteries specifically for your camera may prevent lost photo ops.
Camping/Beach/Outdoor Gear: Bathing suits and light cotton shirts are plentiful on the island. The trunks appear to be reasonably priced, but the white, loosely weaved cotton shirts were expensive.
A good map is nice to have and the stuff you get for free from the tourist businesses on Santorini isn't good enough.
The best map I have found is the "Road Editions Santorini 1:35000" published in Athens. Good quality paper, accurate with respect to roads and settlements and altitudes, indicates beaches, and with town maps on the back.
You can get it in the newsstand in the Athens airport, on the ferry to Santorini or in Santorini shops once here.
Cost is E 4.20