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Forum: Contest Voting 03-08-2019, 02:06 PM  
Exit Broadway
Posted By cpk
Replies: 22
Views: 214
I would like to nominate this photo
Forum: Contest Voting 03-08-2019, 02:05 PM  
Kirghisse
Posted By cpk
Replies: 20
Views: 198
I would like to nominate this photo
Forum: Contest Voting 03-08-2019, 02:04 PM  
Logging Truck
Posted By cpk
Replies: 10
Views: 87
I would like to nominate this photo
Forum: Pentax DSLR Discussion 03-05-2019, 06:22 AM  
Can anyone recommend an android geotracking app?
Posted By cpk
Replies: 15
Views: 602
Before I wrote my preceding response about how to do the auto-tagging in Lightroom, I went into the software and did the auto-tagging of two photo shoots where I had traveled some distance in each case, one in the city and the other in the country. I did this because I had not done this procedure in a long time and wanted to make sure I described it correctly. I had a hell of a time figuring it out. Why? Mainly because I hadn't done it in so long, but in one case I had your problem because it was around the time daylight savings time came into effect and I hadn't adjusted my camera's time. The times in the cell phone and the camera were out of sync. There is an adjustment in the Map/Tracklog menu called Set Time Zone Offset...; I had to adjust this by one hour to fix the problem. I suspect this may be your problem too.
Forum: Pentax DSLR Discussion 03-04-2019, 05:31 AM  
Can anyone recommend an android geotracking app?
Posted By cpk
Replies: 15
Views: 602
But you do have to turn the Android app on to start it logging, something I have sometimes forgotten to do until I'm already well into my trip. Or, if you're taking a break and have turned the app off, remembering to turn it back on. :)
Forum: Pentax DSLR Discussion 03-03-2019, 10:23 PM  
Can anyone recommend an android geotracking app?
Posted By cpk
Replies: 15
Views: 602
Move the .gpx file from your phone to your desktop or laptop, either by connecting one to the other with a usb cable or by emailing it to yourself. Once stored on your computer you open it within Lightroom as I indicated earlier (Load Tracklog...).
Forum: Pentax DSLR Discussion 03-03-2019, 06:35 PM  
Can anyone recommend an android geotracking app?
Posted By cpk
Replies: 15
Views: 602
I use Ultra GPS Logger and highly recommend it; but, as I recall, it costs a few dollars. It can create several different file formats for your gps data, one of which is recognized by Lightroom.



The Lightroom Map module will integrate the gps data from your .gpx file with your photos depending on the time stamps. This is done within Lightroom without going to an outside web site. In the Map module under the Map/Tracklog menu, Load Tracklog... and then select Auto-Tag Photos after selecting the photos you want auto-tagged.
Forum: General Photography 02-15-2019, 04:14 PM  
Hood-loupe
Posted By cpk
Replies: 13
Views: 510
When I converted my K-7 to infrared I ended up using this device: Hoodman Live View Kit for all DSLR Cameras - HLVKIT (this or some other equivalent model). It enables me to handhold my camera and use live view under all lighting conditions. It is pricey. I suspect that all you need is the hood part, especially if you are using a tripod. As suggested in an earlier post, there is an elastic band accessory which would make its use easier. The hood is excellent.

Added: By the way, I wear glasses too. They're not needed when using the hood.
Forum: Digital Processing, Software, and Printing 02-10-2019, 02:44 PM  
How do I install ICC profiles in Lightroom?
Posted By cpk
Replies: 7
Views: 414
From the blurb.com support website:


Could this problematic profile of yours be for the CMYK colour space?
Forum: Digital Processing, Software, and Printing 02-10-2019, 01:22 PM  
How do I install ICC profiles in Lightroom?
Posted By cpk
Replies: 7
Views: 414
Does the file name end in .icc or .icm? Although I cannot find a definitive answer on the web, it appears to me that Lightroom will recognize only .icm profiles.
Forum: Digital Processing, Software, and Printing 02-09-2019, 08:12 PM  
How do I install ICC profiles in Lightroom?
Posted By cpk
Replies: 7
Views: 414
The icc profiles should be in C:\Windows\system32\spool\drivers\color.
Forum: Pentax K-1 01-13-2019, 02:08 PM  
Image color
Posted By cpk
Replies: 3
Views: 565
I've often had variances in colour balance within a series of shots. Occasionally a shot will be more yellowish than the others when on auto white balance. Your situation is much more extreme than anything I've seen.
Forum: Pentax SLR Lens Discussion 01-08-2019, 08:19 PM  
Infrared lens for Pentax
Posted By cpk
Replies: 22
Views: 999
Forum: Pentax SLR Lens Discussion 01-07-2019, 03:46 PM  
Infrared lens for Pentax
Posted By cpk
Replies: 22
Views: 999
Forum: General Photography 12-31-2018, 06:48 PM  
Full frame vs the rest, can you see it?
Posted By cpk
Replies: 50
Views: 2,317
Yes, yes, yes!

Besides timb64's comment, what, to me, is missing from this thread is street photography. I certainly don't question the advantages of the K-1's larger sensor which has to be an advantage when cropping an image, a common occurrence when doing street photography. But the K-1 is considerably large than the K-5/K-5 II I use (see https://camerasize.com). I used to use Leica Ms (long gone now); and the K-5 profile is similar, given that it is a dslr rather than a rangefinder (it feels similar in my hands). Any larger camera, such as the K-1, is going to be more conspicuous.
Forum: Pentax Film SLR Discussion 12-29-2018, 08:00 PM  
Anyone recognise this camera ?
Posted By cpk
Replies: 18
Views: 1,398
It is an MX. It's identical to the one I bought my daughter Lucia years ago and I am now holding in my hands. Mine is a black body one.
Forum: Pentax Film SLR Discussion 12-13-2018, 07:22 AM  
LX or MX?
Posted By cpk
Replies: 12
Views: 754
Understood. I would agree that in your use of the LX (or an MX or any other camera) a winder would be a definite asset. A motor drive might be better because of the wind speed although they are harder to come by. As to the metering system, the LX's is definitely more complex than the MX's, but will it improve things in your case? A hand-held incident light meter may the best approach unless the lighting conditions are constantly and quickly changing.
Forum: Pentax Film SLR Discussion 12-12-2018, 04:40 PM  
LX or MX?
Posted By cpk
Replies: 12
Views: 754
How are you using your LX? I have both the LX and the MX, complete with winders. I am using the LX for street photography without the winder because of the weight it adds and, to some degree, its noise. For me the LX's metering system is ideal for my purposes because I can set the f-stop and the LX chooses the shutter speed depending in the lighting situation at the moment. If I were to use the MX for street photography, I would have to re-meter each time the lighting situation changes. However, if I were to use the MX, I would use it with the winder because it makes it easier to hold (I have the side grip on my LX).
Forum: Pentax DSLR Discussion 11-23-2018, 06:49 AM  
Would you upgrade from the K20d to the K5?
Posted By cpk
Replies: 42
Views: 1,619
I agree completely. I performed a series of low-light focusing tests between the K-5 and K-5 II, and the latter was definitely better. If your budget is a limiting factor, choose the K-5 II/IIs over the K-5.
Forum: Pentax DSLR Discussion 11-18-2018, 10:12 AM  
Just bought a K-1. Do I sell my K-3 or K-3ii? Advice sought.
Posted By cpk
Replies: 26
Views: 1,423
When I got my K-5 II as a companion to my K-5, I converted my K-7 to infrared. It was well worth it and opened up a totally new type of photography to me.
Forum: Pentax SLR Lens Discussion 11-15-2018, 04:41 PM  
Orange Writing on Lenses
Posted By cpk
Replies: 26
Views: 1,509
Thanks, Steve, for the confirmation; I haven't provided this type of explanation for many years. I should add that this explanation got me a career in IT which exceeded 50 years.
Forum: Pentax SLR Lens Discussion 11-13-2018, 08:17 PM  
Orange Writing on Lenses
Posted By cpk
Replies: 26
Views: 1,509
I still cannot agree. The concept of depth of field depends on the ability of the eye to see fine detail at varying distances. It is entirely an optical concept and has nothing to do with the resolution of the sensor. Whether we are talking film or digital, the apparent sharpness depends entirely on the size of the circle of confusion at varying distances within the image. At the focus plane the circle of confusion ideally is a point (in a perfect optical system) and gets larger as one moves away from the focus plane, both in front of it and behind it. Closer to the focus plane the eye sees these circles of confusion as points of sharpness; but as parts of the image move away from the focal plane at some point the circles of confusion become too large for the eye to see as sharp. This point (two actually), both in front of the focal plane and behind, marks the limit of the depth of field for that lens setting.



This suggestion is effectively saying to use a smaller circle of confusion in calculating the depth of field.

Here is the explanation from Wikipedia (I looked this up after writing my explanation in case I wasn't clear enough):

Precise focus is possible in only one two-dimensional plane; in that plane, a point object will produce a point image.[1] In any other plane, a point object is defocused, and will produce a blur spot shaped like the aperture, which for the purpose of analysis is usually assumed to be circular. When this circular spot is sufficiently small, it is indistinguishable from a point, and appears to be in focus; it is rendered as "acceptably sharp". The diameter of the circle increases with distance from the plane of focus; the largest circle that is indistinguishable from a point is known as the acceptable circle of confusion, or informally, simply as the circle of confusion. The acceptable circle of confusion is influenced by visual acuity, viewing conditions, and the amount by which the image is enlarged (Ray 2000, 52–53). The increase of the circle diameter with defocus is gradual, so the limits of depth of field are not hard boundaries between sharp and unsharp.
Forum: Pentax SLR Lens Discussion 11-13-2018, 10:37 AM  
Orange Writing on Lenses
Posted By cpk
Replies: 26
Views: 1,509
I would question your conclusions about modern gear taking us further, but you are right about image size and viewing distance. Apparent sharpness depends entirely on the resolving power of the human eye + viewing distance. One would expect to stand further away from a 16 x 20 print than from an 8 x 10 one. If you view the former at the same distance as you would normally view the latter, apparent depth of field lessens in the larger print. Pixel peeping is meaningless in this context unless you stand away from the screen at a distance that adjusts for the image size on the screen when compared to the print size.
Forum: Pentax DSLR Discussion 10-31-2018, 03:28 PM  
Upgrade to my K5 for low light gig photography
Posted By cpk
Replies: 47
Views: 2,087
When the K-3 was introduced and the price of the K-5 II dropped, I purchased the latter. There were several reasons for this: the lower price, grip compatability with my K-5 and K-7, comparable feel, and the comparisons of the K-3 and K-5 II at that time indicated the phase detection autofocusing was comparable between the two cameras (contrast detection, which was definitely better in the K-3, was not important to me). My tests of dim light focusing (street photography at night) indicated that the K-5 II was definitely better than the K-5. It also made it possible for me to convert my then-backup K-7 to infrared. A K-5 II might be worth a try, especially since the cost will be relatively low.
Forum: Pentax DSLR Discussion 10-29-2018, 06:54 AM  
Chromebook and PEntax K-S2
Posted By cpk
Replies: 3
Views: 994
I had a Chromebook and installed Android apps on it, but not the Pentax one. I returned it to the dealer in the end over a pricing issue, but the Android apps on it functioned as they should. The issue in respect to Android apps on a Chromebook is the version of the operating system. See Install Android apps on your Chromebook - Chromebook Help.

Added: Most box stores give you two weeks to try out a computer with the option to return it if it is not satisfactory. In that time you can test the Pentax app.
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