Technical Question

guzziknight · Jan 31, 2012

Hi Guys,

I noticed something interesting yesterday while shooting. When I take my shots, then merge them into HDRs, the HDR looks to have a slightly wider view and has some distortion. I noticed it, because the lens hood I have on my 14mm, doesn't show up in the straight shots, but does in the HDRs. Also, I can see the distortion. I've noticed this before, but it usually isn't an issue. I was just curious if anyone else has noticed this, or is it a factor of my Micro 4/3 system.

1. Original image, non-HDR, processed but not cropped

2. HDR, not cropped

Bynx · Jan 31, 2012

It must be a problem with your lens. Ive taken images that have been put through Photomatix and then after, combined that final image with an original exposed shot if I wanted to fix something I didnt like. They matched perfectly.

Rephargotohp · Jan 31, 2012

SInce you use Lightroom, I suspect this is a Lightroom "Issue" if you use Lens profiles in Lightroom, it will auto-correct for lens distortions and crop the image.
When you take your exposures into the HDR processor first, it doesn't go through that correction

ann · Jan 31, 2012

this looks llike a Richard Meyer building. where is it located?

analog.universe · Jan 31, 2012

Rephargotohp said:
SInce you use Lightroom, I suspect this is a Lightroom "Issue" if you use Lens profiles in Lightroom, it will auto-correct for lens distortions and crop the image.
When you take your exposures into the HDR processor first, it doesn't go through that correction

This is what it looks like to me as well. The first image is cropped relative to the second. Which 14mm?

guzziknight · Jan 31, 2012

ann said:
this looks llike a Richard Meyer building. where is it located?

High Museum, Atlanta.

guzziknight · Jan 31, 2012

analog.universe said:
Rephargotohp said:

SInce you use Lightroom, I suspect this is a Lightroom "Issue" if you use Lens profiles in Lightroom, it will auto-correct for lens distortions and crop the image.
When you take your exposures into the HDR processor first, it doesn't go through that correction

Click to expand...

This is what it looks like to me as well. The first image is cropped relative to the second. Which 14mm?

Panasonic 14mm, Micro 4/3. Shot on an Olympus E-P1.

guzziknight · Jan 31, 2012

Rephargotohp said:
SInce you use Lightroom, I suspect this is a Lightroom "Issue" if you use Lens profiles in Lightroom, it will auto-correct for lens distortions and crop the image.
When you take your exposures into the HDR processor first, it doesn't go through that correction

Good idea, but I don't think that's it. I don't have that feature enabled, and it doesn't even list Panasonic as a brand. When I need to, I do corrections manually.