Question about taking sky images

hdri
1

Dear List:
I am practicing the IBL simulation and run into an issue when taking HDR
images of sky. I use Canon 5D 2 with a SIGMA fisheye lens. I put a Koda
neutral density filter 3 between the camera and the lens before taking a
sky image. However, when I put the filter in, the camera loses aperture
information. When I take the filter out, the camera works normally. I can
set the aperture size before taking images with filter in, but all the
images I take have no aperture information and cannot be applied to hdrgen
for combination. Does anyone have the same problem? What is the solution to
this problem?
Any suggestion is appreciated. Thank you,

···

--
*Zhe Kong*
*PhD Student*
*University of Wisconsin - Milwaukee *
*School of Architecture and Urban Planning *
*2131 E. Hartford Ave, Milwaukee, WI 53211 *
*Office 327*

2

you nee to use exiftool to add missing info like:
exiftool -FNumber=XXXXXXX picture.JPG
and change XXXXX to the aperture used
works for me with various leica m
G

···

On 8 Oct 2016, at 19:12, Zhe Kong <[email protected]> wrote:

aperture

3

Hello Giulio:
Thank you very much for your reply. I downloaded exiftool and it works
well. Just another question if you could help me out.
Since I am taking images of sunny sky using two aperture, f/4 and f/16, it
is hard to change the aperture without any information. No matter I take
images using the camera or from EOS in my laptop, the aperture shows F00 on
both the camera and EOS. My current solution is to set the right aperture
and then put ND 3 in to take images, and then take the filter out to set
the other aperture. However, this procedure clearly prolongs the
image-taking time and results in inaccurate sky images. I borrowed a Nikon
before without such issue. Do you suggestion any better solution rather
than taking the filter out in order to set an aperture?

Thank you very much,
Zhe

···

On Sun, Oct 9, 2016 at 2:00 PM, <[email protected]> wrote:

Send HDRI mailing list submissions to
        [email protected]

To subscribe or unsubscribe via the World Wide Web, visit
        http://www.radiance-online.org/mailman/listinfo/hdri
or, via email, send a message with subject or body 'help' to
        [email protected]

You can reach the person managing the list at
        [email protected]

When replying, please edit your Subject line so it is more specific
than "Re: Contents of HDRI digest..."

Today's Topics:

   1. Re: Question about taking sky images (Giulio Antonutto)

----------------------------------------------------------------------

Message: 1
Date: Sat, 08 Oct 2016 21:16:21 +0100
From: Giulio Antonutto <[email protected]>
To: High Dynamic Range Imaging <[email protected]>
Subject: Re: [HDRI] Question about taking sky images
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"

you nee to use exiftool to add missing info like:
exiftool -FNumber=XXXXXXX picture.JPG
and change XXXXX to the aperture used
works for me with various leica m
G

> On 8 Oct 2016, at 19:12, Zhe Kong <[email protected]> wrote:
>
> aperture

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.radiance-online.org/pipermail/hdri/
attachments/20161008/f7d7e55c/attachment-0001.html>

------------------------------

Subject: Digest Footer

_______________________________________________
HDRI mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/hdri

------------------------------

End of HDRI Digest, Vol 85, Issue 2
***********************************

--
*Zhe Kong*
*PhD Student*
*University of Wisconsin - Milwaukee *
*School of Architecture and Urban Planning *
*2131 E. Hartford Ave, Milwaukee, WI 53211 *
*Office 327*

4

why not leaving filter in, same aperture and adjust the shutter speed on camera?
that would be the correct way
G

···

On 10 Oct 2016, at 22:38, Zhe Kong <[email protected]> wrote:

Hello Giulio:
Thank you very much for your reply. I downloaded exiftool and it works well. Just another question if you could help me out.
Since I am taking images of sunny sky using two aperture, f/4 and f/16, it is hard to change the aperture without any information. No matter I take images using the camera or from EOS in my laptop, the aperture shows F00 on both the camera and EOS. My current solution is to set the right aperture and then put ND 3 in to take images, and then take the filter out to set the other aperture. However, this procedure clearly prolongs the image-taking time and results in inaccurate sky images. I borrowed a Nikon before without such issue. Do you suggestion any better solution rather than taking the filter out in order to set an aperture?

Thank you very much,
Zhe

On Sun, Oct 9, 2016 at 2:00 PM, <[email protected] <mailto:[email protected]>> wrote:
Send HDRI mailing list submissions to
        [email protected] <mailto:[email protected]>

To subscribe or unsubscribe via the World Wide Web, visit
        http://www.radiance-online.org/mailman/listinfo/hdri
or, via email, send a message with subject or body 'help' to
        [email protected] <mailto:[email protected]>

You can reach the person managing the list at
        [email protected] <mailto:[email protected]>

When replying, please edit your Subject line so it is more specific
than "Re: Contents of HDRI digest..."

Today's Topics:

   1. Re: Question about taking sky images (Giulio Antonutto)

----------------------------------------------------------------------

Message: 1
Date: Sat, 08 Oct 2016 21:16:21 +0100
From: Giulio Antonutto <[email protected] <mailto:[email protected]>>
To: High Dynamic Range Imaging <[email protected] <mailto:[email protected]>>
Subject: Re: [HDRI] Question about taking sky images
Message-ID: <[email protected] <mailto:[email protected]>>
Content-Type: text/plain; charset="us-ascii"

you nee to use exiftool to add missing info like:
exiftool -FNumber=XXXXXXX picture.JPG
and change XXXXX to the aperture used
works for me with various leica m
G

> On 8 Oct 2016, at 19:12, Zhe Kong <[email protected] <mailto:[email protected]>> wrote:
>
> aperture

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.radiance-online.org/pipermail/hdri/attachments/20161008/f7d7e55c/attachment-0001.html>

------------------------------

Subject: Digest Footer

_______________________________________________
HDRI mailing list
[email protected] <mailto:[email protected]>
http://www.radiance-online.org/mailman/listinfo/hdri

------------------------------

End of HDRI Digest, Vol 85, Issue 2
***********************************

--
Zhe Kong
PhD Student
University of Wisconsin - Milwaukee
School of Architecture and Urban Planning
2131 E. Hartford Ave, Milwaukee, WI 53211
Office 327
_______________________________________________
HDRI mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/hdri