Fender Strat .CC please

[doziergraphic]

Why would you change your F-stop when doing an HDR?

??? You mean as opposed to changing the shutter speed? Or am I missing something (likely)?

 

[KmH]

Changing the f-stop also changes the depth-of-field.

 

[SrBiscuit]

Changing the f-stop also changes the depth-of-field.

that ^

...and then youve got shots with different areas blurred, and that aint gon work when you layer them up.

 

[doziergraphic]

One of those things I thought about, but then dismissed (for some unknown reason) cause MOST of the HDR tutorials talk about setting the camera to BRACKET your shots one full stop above and below.

Just did several hundred HDR (bracketed) shots over the past few days, and yeah, there is some blur there, but I try to keep it at f/11 to f/22.

Guess I need to go back and drop the bracketing and do it by changing the shutter speed... duh! (I'm assuming using bracketing in my camera changes the ap and not the shutter)...

 

[Geaux]

Can't you just leave it at the same shutter and F-stop, just change the EV level from -1, 0, and 1? Or am I missing something?

 

[SrBiscuit]

i kinda thought thats how cameras bracketed anyway, no?

 

[doziergraphic]

Once again -- DUH (on my part)!

After checking, bracketing in camera DOES change the Shutter speed, NOT the f/stop.

good thing the camera is smarter than I am.

 

[KmH]

Doing only 3 exposure may not be enough. 3 is the minimum to make an HDR.

You have to meter the scene and determine the dynamic range you need to cover.
You may have scene that needs 1/3 stop steps, not full stop steps.
You may have a scene that needs full stop steps but you need 7 steps to cover the dynamic range.

Making a good HDR images is a lot more involved than many people realize, and we haven't even gotten to the part about doing the post processing yet.

 

[Infidel]

Can't you just leave it at the same shutter and F-stop, just change the EV level from -1, 0, and 1? Or am I missing something?

EV = exposure value, right? Aperture, shutter speed, and ISO all influence EV. Which parameter you decide to vary will influence the appearance of the composite image. Changing aperture results in varying degrees of depth of field and changing ISO can introduce noise. Thus, you're left with shutter speed, which assuming camera shake and subject movement aren't going to be problematic, is the one to adjust.

Maybe you're thinking about exposure compensation, which IS what you want to change, provided you're in aperture priority mode and auto ISO is off. This WILL vary the shutter speed.