I can't comment on in -camera jpeg vs raw portrayal on the K30 as I don't use
jpegs or make any adjustments to the in-camera jpeg preferences but having
switched from previous Pentax models to the K30 I do notice that the K30, even
when using the relatively straightforward centre weighted metering, takes
considerably darker images than its predecessors.
The darker image is visible on in-camera preview using the camera's own LCD .
When viewed in dt both the light table preview image (based on the in camera
embedded jpeg) and the full raw opened in darkroom mode are similar to the
camera's own LCD preview. So my impression is that the Pentax basecurve in
darktable is OK and the adjustment needed for the particular camera
characteristics seems to be either a simple lift in exposure within darktable
or (better) leaving dt at default and setting the camera to something like +0.5
stops exposure increase when taking pictures, at least when intending to use
raws. Possibly it does some other fancy stuff in its own jpeg processing to
make the images more attractive but I wouldn't like to see dt mimic that at the
expense of making raws look different to the actual preview we see when
operating the camera.
Rgds,
Rob.
From: Bernhard [mailto:[email protected]]
Sent: 23 April 2014 05:42
To: [email protected]
Subject: Re: [Darktable-users] Images too dark: Pentax K-30 on Darktable
Hallo,
from I would judge after a first glance at the samples the cause might be those
small but bright pieces in the pictures:
bikeride: the white part with the reflections in the bottom right part of the
picture
stonehenge: the clouds in the top right corner
I noticed such behavior with my Nikon and Olympus Cams also.
This preserves details in the highlights in a first step and it's up to you to
decide if this is a good idea - the way you like it - or not.
You may switch on 3.3.9.3. Over/underexposed warning and prove me right or
wrong ...
regards
Bernhard
Neeum Zawan schrieb am 23.04.2014 03:18:
Hi,
I have a Pentax K-30.
I've noticed that for a lot of photos I take, the camera JPEG is
considerably, well, brighter than what Darktable shows initially when I load
the DNG file (base curve is set to Pentax).
I've uploaded sample files from
http://www.nawaz.org/media/images/darktable/photos.zip
You can see some examples here:
Darktable output:
http://www.nawaz.org/media/images/darktable/bikeride-7026.jpg
Camera JPEG:
http://www.nawaz.org/media/images/darktable/bikeride-7026-camerajpeg.JPG
Now for full disclaimer, on my camera I did set the contrast and saturation
to the lowest setting, so that will affect the JPEGs (and not the DNGs,
which is a good thing). However, I still think Darktable's base curve is a
bit too dark...
It takes me a lot of effort to get something decent out of these dark
photos, and I don't think I do a good job (Google Plus's automatic algorithm
did much better...). I know I can make my own base profile, but I feel I'd
be shooting a little in the dark.
Anyway, I wanted some feedback about this. Could it be that the default
profile in Darktable needs improving? Does anyone else have a better base
profile I could use?
(Note, I do NOT want low contrast and low saturation - I set those in the
camera just to get a more accurate histogram when previewing so that I know
I'm not losing data to highlights, etc).
Thanks.
------------------------------------------------------------------------------
Start Your Social Network Today - Download eXo Platform
Build your Enterprise Intranet with eXo Platform Software
Java Based Open Source Intranet - Social, Extensible, Cloud Ready
Get Started Now And Turn Your Intranet Into A Collaboration Platform
http://p.sf.net/sfu/ExoPlatform
_______________________________________________
Darktable-users mailing list
[email protected]<mailto:[email protected]>
https://lists.sourceforge.net/lists/listinfo/darktable-users
This email is confidential and is intended for the addressee only. If you are
not the addressee, please delete the email and do not use it in any way. Please
note that any views or opinions presented in this email are solely those of the
author and do not necessarily represent those of the company. NHBC reserves the
right to monitor all email communications. The recipient should check this
email and any attachments for the presence of viruses. The company accepts no
liability for any damage caused by any virus transmitted by this email. NHBC,
the National House-Building Council, is limited by guarantee in England, No
320784. Registered address: NHBC House, Davy Avenue, Knowlhill, Milton Keynes
MK5 8FP. NHBC is authorised by the Prudential Regulation Authority and
regulated by the Financial Conduct Authority and Prudential Regulation
Authority. NHBC Building Control Services Ltd, registered by guarantee in
England with Company No. 01952969. Registered address: NHBC House, Davy Avenue,
Knowlhill, Milton Keynes MK5 8FP. NHBC Services Ltd registered by guarantee in
England, No 03067703. Registered address: NHBC House, Davy Avenue, Knowlhill,
Milton Keynes MK5 8FP. If you make a claim under a Buildmark policy your
personal details will be stored and processed in accordance with the Data
Protection Act. Your personal details may be passed to others involved with
your claim such as the original builder, or a consultant or remedial works
contractor that we may employ in connection with your claim(s) and matter
ancillary to your claim(s). Other than disclosure provided for in this
statement, we will not pass any data about you to any other party without your
permission unless we are required to do so by law.
------------------------------------------------------------------------------
Start Your Social Network Today - Download eXo Platform
Build your Enterprise Intranet with eXo Platform Software
Java Based Open Source Intranet - Social, Extensible, Cloud Ready
Get Started Now And Turn Your Intranet Into A Collaboration Platform
http://p.sf.net/sfu/ExoPlatform
_______________________________________________
Darktable-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/darktable-users
