Looking for an Iphone App

[nbaresejr]

Hi all,

I was wondering if anyone knew of an app i could use for the Iphone that would help me for exposure bracketing for HDR. I would like the app to allow me to plug in the settings for an EV 0 exposure and then tell me what settings i would need to use for -2, -1, +1, +2.

My camera will do 3 bracketed shots but only up to 30 sec. I ran into trouble with this on the last trip because I had a shot of 25 sec for EV-0 and it would not allow the plus 2 unless i was in bulb. Bulb would be fine but i struggle with what + 1 and +2 would be in these situations.

The perfect app for me looks to be EV Calc 1.0 (halfway down on the linked page) But that page is older and i cant find this app in the app store.
http://www.stockholmviews.com/photographers-iphone/

Any help would be appreciated.

 

[hakepb]

I'm curious. What type of photo are you taking that requires 90seconds of exposure?

This article talks about ProHDR http://connect.dpreview.com/post/2863436371/leaving-my-dslr-at-home-iphone-experiment?page=2

But in playing around with the free version in manual mode you "only" tap on the bright area in the potential picture then the dark area and it adjusts the exposure settings.

 

[hakepb]

Ahhh. I think I just figured out that you are not just using the iPhone camera

In a crude way, something i read about in my astrophotography experimentation was bump up the ISO for each stacked photo.

 

[nbaresejr]

Yes this app is to help me with exposures for my DSLR not my Iphone. I just want the app on the Iphone to help me.

The photo below was a 15 sec exposure. If i wanted to do 5 bracketed shots the bracketing would not work on my t2i for anything over 30sec unless i was in manual. Where i need help is how to determine was would be +1, +2 -1, -2


Down the Hatch by nickbarese, on Flickr

 

[mabas9395]

I'm sure someone will correct me if I'm wrong (that's what the internet is best at), but the +1, +2, etc for HDR bracketing represents a photographic "stop" which is just a double or half of the light you let in. So if you have a 15sec exposure for your base exposure, you would just double that to 30sec and then double that again to 60sec for a +2.

Does that make sense or am I not understanding your question?

 

[cpbjgc]

I'm sure someone will correct me if I'm wrong (that's what the internet is best at), but the +1, +2, etc for HDR bracketing represents a photographic "stop" which is just a double or half of the light you let in. So if you have a 15sec exposure for your base exposure, you would just double that to 30sec and then double that again to 60sec for a +2.

Does that make sense or am I not understanding your question?

This makes sense. Excactly what I was thinking as I read the question.

 

[nbaresejr]

Originally Posted by mabas9395
I'm sure someone will correct me if I'm wrong (that's what the internet is best at), but the +1, +2, etc for HDR bracketing represents a photographic "stop" which is just a double or half of the light you let in. So if you have a 15sec exposure for your base exposure, you would just double that to 30sec and then double that again to 60sec for a +2.

Does that make sense or am I not understanding your question?
This makes sense. Excactly what I was thinking as I read the question.

you guys both got it right. So on the opposite side if i wanted -1, -2 i would take my 15sec and cut in half (7.5) and then cut in half again? (3.75)

Am i getting this correct?

 

[cpbjgc]

you guys both got it right. So on the opposite side if i wanted -1, -2 i would take my 15sec and cut in half (7.5) and then cut in half again? (3.75)

Am i getting this correct?

You are correct!