Actually, I think you leave the aperture constant and change the exposure length.

Looks like there may have been a little movement in the exposures. You have to be absolutely motionless when taking the multiple exposures. Tough to do, even with a tripod.

Yeah i used a tripod and even used the camera'* timer on top of that....tough is an understatement.

yes the aperature needs to be constant so that the depth of field will not change. you also need to use manual focus so that the focus i in exactly the same place between exposures. its not too hard once you get the hang of it. IMO your effect is a little overdone... what program did you use?i reccomend photomatix

Who are you asking? I used photoshop.

i was asking the original poster.. that comment was directed at him. yours definitely arent overdone. plus they arent true HDR

Photoshop will not give you the best results. Like someone said photomatix is the best. I have done ALOT of HDR pictures and John deer boy I love you but you just dont do it right. :( Shadow and highlight is still a 8bit image (maybe RAW which is higher bit image) but HDR is 32bit. There is no way you can get that kind of tonal range with 1 picture that is 8 bit.

Photoshop will give you a 16bit HDR image not even close to what photomatix will do for you a 32bit image

8 vs 16 bit doesnt really matter a whole lot. post an image of each, you cant really tell the difference. HDR ends up being taken down to 8 or 16-bit, because you don't have an HDR monitor. it can only display a certain range of lights and darks.. not the foll tonal range that you can see with your eyes.

It sure does matter, I can tell every single time I shoot raw and JPEG. And that Jpeg which is 8bit and the raw is 12bit there is a hugh difference even with just that. Your right on monitors not showing the full tonal range but there is still a hugh difference on my apple display. So what kind of stuff do you do Bonnevillan?? Do you shoot professionally?

no, just a hobby shooter with a Nikon D50. I have shot motocross photos for a website before, at the national races. that was when i realized all the photographers around me had 100x more gear and money into it

do you do professional shooting?

i guess you are right there is a bit of a difference. but low quality stuff online, i would bet the average web user wont notice.