All Forum Comments
Comment by MattMatic posted on how make IR photos with Pentax DSLRs at 25/11/2012 - 15:21
http://www.pktether.com/new-version-0-4-5
Quote:
Tomasz says:
March 27, 2011 at 11:17 am
I check possibilities, and so far:
- not many phones have usb host or OTG possibilities
- I don’t have knowledge how control usb host from android
- I never programing for android
- more importand for me now is port it to Mac and Linux
http://www.imaging-resource.com/news/2011/12/28/pk-tether-updated-multi-platform...Tomasz says:
March 27, 2011 at 11:17 am
I check possibilities, and so far:
- not many phones have usb host or OTG possibilities
- I don’t have knowledge how control usb host from android
- I never programing for android
- more importand for me now is port it to Mac and Linux
Quote:
Tomasz notes separately that the tiny Pentax Q compact system camera is not yet supported by the program, although work is underway to allow this. Tomasz is also working on an Android version, as well as a version for Mac OS X, although development of the latter is hindered by limited access to Mac hardware. Finally, Tomasz also has plans to offer wireless tethered shooting capability using Raspberry Pi hardware in the future.
Tomasz notes separately that the tiny Pentax Q compact system camera is not yet supported by the program, although work is underway to allow this. Tomasz is also working on an Android version, as well as a version for Mac OS X, although development of the latter is hindered by limited access to Mac hardware. Finally, Tomasz also has plans to offer wireless tethered shooting capability using Raspberry Pi hardware in the future.
Comment by MattMatic posted on PK-Tether for Android at 23/11/2012 - 09:51
Just a thought... I can't remember what the top LCD behaviour is when the SD card door is open on the K10D.
There's a tiny switch that indicates whether the card door is open. (I have a very broken one here in pieces!) When you open the door, there is an "L" shaped piece of plastic that pushes on the switch. The switch itself has a tiny 1mm pin that is pushed in by the door - quite fragile!
I can check with the working K10D when I get home...
Matt
There's a tiny switch that indicates whether the card door is open. (I have a very broken one here in pieces!) When you open the door, there is an "L" shaped piece of plastic that pushes on the switch. The switch itself has a tiny 1mm pin that is pushed in by the door - quite fragile!
I can check with the working K10D when I get home...
Matt
Comment by MattMatic posted on K10D suddenly fails to turn on at 22/11/2012 - 15:22
Quote:
...a return to JPS...
A bit of a treck from the Philippines ...a return to JPS...
Matt
Comment by MattMatic posted on K10D suddenly fails to turn on at 22/11/2012 - 15:19
Does anything happen when you hold down the MENU button while powering on?
(That normally shows firmware version)
Matt
(That normally shows firmware version)
Matt
Comment by MattMatic posted on K10D suddenly fails to turn on at 22/11/2012 - 14:03
Quote:
I have a personal business interest in QPcard, so weigh that in when reading my posts regarding this particular matter.
Understood I have a personal business interest in QPcard, so weigh that in when reading my posts regarding this particular matter.
But your technical experience on this, Joakim, is greatly appreciated!
Matt
Comment by MattMatic posted on ACR camera profile for K-5 at 20/11/2012 - 14:26
Also watch out that light coming in through the viewfinder can affect the metering
But it's an interesting point nonetheless...
Matt
But it's an interesting point nonetheless...
Matt
Comment by MattMatic posted on How sensitive is your camera? at 20/11/2012 - 12:38
Some versions with the Q:
(Note, the DNG has an embedded profile to choose from as well)
Adobe & Embedded show some serious gamut clipping!
http://www.photon.me.uk/pu/qpcard/IMGP1904_1k-AdobeStandard.jpg
http://www.photon.me.uk/pu/qpcard/IMGP1904_1k-Embedded.jpg
http://www.photon.me.uk/pu/qpcard/IMGP1904_1k-QPcard.jpg
Wildly different colours, but the QPcard was what I saw
http://www.photon.me.uk/pu/qpcard/IMGP1906_1k-AdobeStandard.jpg
http://www.photon.me.uk/pu/qpcard/IMGP1906_1k-Embedded.jpg
http://www.photon.me.uk/pu/qpcard/IMGP1906_1k-QPcard.jpg
(Note, the DNG has an embedded profile to choose from as well)
Adobe & Embedded show some serious gamut clipping!
http://www.photon.me.uk/pu/qpcard/IMGP1904_1k-AdobeStandard.jpg
http://www.photon.me.uk/pu/qpcard/IMGP1904_1k-Embedded.jpg
http://www.photon.me.uk/pu/qpcard/IMGP1904_1k-QPcard.jpg
Wildly different colours, but the QPcard was what I saw
http://www.photon.me.uk/pu/qpcard/IMGP1906_1k-AdobeStandard.jpg
http://www.photon.me.uk/pu/qpcard/IMGP1906_1k-Embedded.jpg
http://www.photon.me.uk/pu/qpcard/IMGP1906_1k-QPcard.jpg
Comment by MattMatic posted on ACR camera profile for K-5 at 19/11/2012 - 15:53
Some examples...
I have literally only changed the Profile between the two settings. However, as mentioned, before when working only with Adobe Standard I would increase the Clarity & Vibrance to try and bring some "pop" to the image - and I had this as a preset. Once switched over to the QPcard profile I found that these values needed to be much lower! Now I can see that pushing the values with the original Adobe Standard profile produced images that were 'wrong' in a way I couldn't put my finger on...
http://www.photon.me.uk/pu/qpcard/IMGP0495_1k-AdobeStandard.jpg
http://www.photon.me.uk/pu/qpcard/IMGP0495_1k-QPcard.jpg
Pinks are much closer to real life and with more detail, while greens are richer.
http://www.photon.me.uk/pu/qpcard/IMGP0521_1k-AdobeStandard.jpg
http://www.photon.me.uk/pu/qpcard/IMGP0521_1k-QPcard.jpg
QPcard is definitely more accurate (this was shot in the pouring rain). Brickwork much warmer (as indeed it was), purples & greens showing more detail and accurate rendering, and the vibrant orange and red are now much better controlled.
Matt
I have literally only changed the Profile between the two settings. However, as mentioned, before when working only with Adobe Standard I would increase the Clarity & Vibrance to try and bring some "pop" to the image - and I had this as a preset. Once switched over to the QPcard profile I found that these values needed to be much lower! Now I can see that pushing the values with the original Adobe Standard profile produced images that were 'wrong' in a way I couldn't put my finger on...
http://www.photon.me.uk/pu/qpcard/IMGP0495_1k-AdobeStandard.jpg
http://www.photon.me.uk/pu/qpcard/IMGP0495_1k-QPcard.jpg
Pinks are much closer to real life and with more detail, while greens are richer.
http://www.photon.me.uk/pu/qpcard/IMGP0521_1k-AdobeStandard.jpg
http://www.photon.me.uk/pu/qpcard/IMGP0521_1k-QPcard.jpg
QPcard is definitely more accurate (this was shot in the pouring rain). Brickwork much warmer (as indeed it was), purples & greens showing more detail and accurate rendering, and the vibrant orange and red are now much better controlled.
Matt
Comment by MattMatic posted on ACR camera profile for K-5 at 19/11/2012 - 15:28
Quote:
Do you know a way of creating a dual illuminant profile using the QPcard? The Adobe DNG Profile Editor only seems to support the X-Rite ColorChecker. If I could resolve that question I'd order a QPcard now.
Actually, it's worth emailing QPcard directly.Do you know a way of creating a dual illuminant profile using the QPcard? The Adobe DNG Profile Editor only seems to support the X-Rite ColorChecker. If I could resolve that question I'd order a QPcard now.
Their software doesn't cover dual illuminant profiles... see this thread: http://www.luminous-landscape.com/forum/index.php?topic=43733.0
Quote:
3. It's not the shooting temperature that matters, but the spectrum of the illumination. This is more complex and not easily measurable. General advice: if you tend to photograph under daylight, not worth building profile for each flavor of daylight, regardless of the color temp. There will be minor variations between ~D50 and ~D75 lighting (roughly 5000 K and 7500 K CCT) but this tends to get eliminated once WB is considered. If you photograph under unusual artifical lighting often, consider building a profile for that lighting.
I'm just in a conversation with them (on a closely related matter) and they are exceedingly helpful and knowledgeable!3. It's not the shooting temperature that matters, but the spectrum of the illumination. This is more complex and not easily measurable. General advice: if you tend to photograph under daylight, not worth building profile for each flavor of daylight, regardless of the color temp. There will be minor variations between ~D50 and ~D75 lighting (roughly 5000 K and 7500 K CCT) but this tends to get eliminated once WB is considered. If you photograph under unusual artifical lighting often, consider building a profile for that lighting.
The profile for the QPcard is created directly with their software - so the Adobe DNG Profile Editor doesn't even figure in the equation Personally, I've found the results of just a cloudy lit QPcard 203 excellent under most lighting conditions - certainly better than Adobe Standard!
You just shoot DNG/PEF, load it straight into their QPcalibration software, tell it what kind of profile to produce and click the button! Next time you boot up LR, the profile is available in the drop down list
To be honest, it's so quick to produce a profile, there's really no need for dual illuminant profiles - just create a profile for each condition and choose from the drop down list
Other plug ins within QPcalibration allow for fine tuning of colours (QPcalibration Adjust), and inspection (QPcalibration Inspect). Additionally, you can output ICC files instead with a plugin (though not compatible with all RAW converters yet).
FWIW, there are some good "Before & After" images on their site that give an idea - http://www.qpcard.com/en_b2c/abcomparisons
Incidentally, my profiling at all ISOs was done out of curiosity to see how the profile changed over the range. It seems pretty stable from what I could see from a cursory glance, except that things fell apart quite badly at around ISO 12800 (But then QPcard say as much!)
I'll see if I can rustle up a quick LR version that shows the results from the K5 too...
Matt
Comment by MattMatic posted on ACR camera profile for K-5 at 19/11/2012 - 15:14
turned out to be necessary...
...but not sufficient
The built in metering will not help at all! You'll probably get a black image if you try
For IR photography you have to use fully manual
Start with f/8, and guess the shutter speed - start at 8seconds and work from there, doubling the time until you get a reasonable exposure.
Personally, I found the K-7 was pretty good at IR, but the K-5 has a more aggressive IR-cut filter that means a much longer exposure But, with experimentation you'll get there.
Matt