Forum: Weekly Photo Challenges
03-20-2024, 08:26 AM
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When I was working (having retired 9 years ago), we needed some pictures for the wall in our office, the Department of Chemistry. I decided to take some pictures of some old glassware stills we had in the laboratory. These were taken with a Pentax K100D Super, Super-Takumar 35mm f2 lens @f8, ISO200, and an AF-280T flash bounced off a white board, with a bounce card in the flash, against some black felt backdrop. I had these individually printed on 18" x 24" canvas and mounted on frameless mounts. The three pictures were to be hung side-by-side. This was done over 11 years ago, and I recently discovered that they are still hanging on the wall in the office. :)
-Joe-
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Forum: Pentax K-30 & K-50
10-13-2023, 06:27 AM
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Elias, no picture showed up - try posting again.
-Joe-
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Forum: Lens Clubs
03-02-2023, 12:52 PM
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We've been enjoying some warm Spring-like afternoons, yielding this...
(Pentax-F 35-70 Macro, f4.5, K5, ISO200)
-Joe-
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Forum: Pentax DSLR Discussion
01-05-2023, 10:00 AM
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UV,
Here is a sample I took with my K100DS in 2008 with a Hoya R72 IR filter. Here are two images: The first is red but with "normalized" RGB channels, and the second is my quick & clumsy attempt at channel swapping. This is with a Vivitar 28mm lens stopped down somewhat, 1/15 second, ISO400.
-Joe-
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Forum: Pentax DSLR Discussion
12-31-2022, 12:49 PM
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I've used an R72 filter on my K100D Super, and it seemed to work well. The trick of course is to use a tripod, frame and focus the scene, take some light measurements, then put the filter in place and adjust the settings (long exposures will be needed), shooting in M mode. A camera converted so that no R72 filter is needed would be nice.
-Joe-
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Forum: Film SLRs and Compact Film Cameras
12-14-2022, 01:18 PM
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Consdier a 35mm folder. I have a couple of Kodak Retina 1a cameras which work fine (zone focusing - you get used to it) for low-profile pocketable film-camera situations. If you really need rangefinder focusing, a Retina IIa works fine. Mine have the 50mm f2.8 lenses. Some IIa models have a 50mm f2.0 lens. Of course, pushing Tri-X or other fast film to 800 or 1600 might be necessary, and a steady hand is needed.
-Joe-
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Forum: Pentax K-3 III
11-04-2022, 01:01 PM
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Try this: Format both cards in-camera, turn off the camera, turn it back on. Does the same problem with a slow first shot happen?
The Pentax recommendation seems to be that SD cards should be formatted by the camera for most-reliable performance.
-Joe-
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Forum: Troubleshooting and Beginner Help
10-14-2022, 07:46 AM
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The pedestal looks like the front surface is white, and if so you could set white balance on that white component. I tried it on your .jpg in Darktable and Raw Therapee, and the colors seemed to be more natural looking to me after color-balancing on that white surface.
-Joe-
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Forum: Troubleshooting and Beginner Help
08-09-2022, 05:36 AM
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I'm a little unclear if you are unhappy with the resulting image, or ONLY the representation of it in the camera LCD display. If the resulting image is a problem, it might be the auto white balance that throws you off. For subjects such as this, use a white or gray card to manually set the white balance, then take the picture of the subject. That should always result in accurate colors. With bright reds, you might want to slightly underexpose (look at the clipping display on the LCD) to make sure the reds are not clipped. I'm somewhat color blind, so rely on such tricks to get things reasonably close (as judged by my wife!).
-Joe-
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Forum: Digital Processing, Software, and Printing
05-30-2022, 06:54 AM
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Welcome!
I also run Linux, but still do my photo processing on a Win system. A decent CPU can run Win applications in Linux nicely with wine. Here is how I have run Faststone Image Viewer on my Linux machine: Install wine (the exact process depends on your Linux variant), then download the latest version of FastStone Image Viewer from here: FastStone Image Viewer, Screen Capture, Photo Resizer .... If you download the installer (.exe file), you can install it in wine (double-click the .exe installer) and you should be presented with a desktop icon to click on to run FastStone. Or, you can download the portable version of it, extract the .zip file into a directory, drill down to that directory with your GUI file manager and double-click on the FastStone .exe file. It's fairly seamless, and seems to perform well, even on my old machines.
This process actually works well with *many* Win programs on Linux, especially if you have a fairly well provisioned CPU (# cores and RAM).
-Joe-
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Forum: Digital Processing, Software, and Printing
12-22-2021, 06:18 PM
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You're on the right track...
Go to each of the three tabs in the Print dialog (Print Index, Print Photo, and Print Bracketing), and carefully go through each setting parameter and make sure that each "Font" field has a valid system font selected from the pull-down font list (non-blank). I just tested this on my system, and that got rid of all error messages in both the settings and print dialogs.
-Joe-
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Forum: Lens Clubs
10-04-2021, 01:22 PM
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Taken with K200D... Fall is here - beautiful afternoon.
-Joe-
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Forum: Pentax SLR Lens Discussion
07-01-2021, 03:10 PM
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Taken with Super-Macro-Takumar 50mm f4, K200D: Tomato bloom and rattlesnake green bean bloom. Vegetable plant blooms can be pretty too, right?
-Joe-
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Forum: Mini-Challenges, Games, and Photo Stories
05-08-2021, 01:03 PM
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Wide open (f2.5), K200D, Topaz B&W Effects2 conversion...
-Joe-
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Forum: Lens Clubs
05-08-2021, 12:57 PM
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Wide open (f2.5) on K200D...
-Joe-
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Forum: Pentax DSLR Discussion
04-30-2021, 03:25 PM
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Shot at f8 or f11 - Sunset out my front door yesterday.
-Joe-
(Cross-posted from the M Club)
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Forum: Lens Clubs
04-30-2021, 03:17 PM
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Shot at f8 or f11 - Sunset out my front door yesterday.
-Joe-
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Forum: Video Recording and Processing
04-21-2021, 06:09 AM
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I do very little with movies, so don't know much about the topic. I took another look at Handbrake, which I have used many times to convert to .mp4 files. I thought it would convert to .avi but don't think it does. So, I did some poking around and found this nice open-source tool, and tested it with some K30 .mov video files, and it worked fine converting from .mov to .avi (lossless conversion). This is open-source freeware: MP4Cam2AVI Easy Converter download | SourceForge.net
It looks like the OP found a command-line solution, and this probably does the same thing, but what's nice about this is the GUI, concentanation, and batch capabilities.
-Joe-
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Forum: Video Recording and Processing
04-20-2021, 07:20 AM
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I've used Handbrake on K5, K30 and K50 movies with no problem, so am not sure why you say it can not convert Pentax dSLR movies to AVI. Maybe movies from newer Pentax dSLRs are different?
-Joe-
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Forum: Lens Clubs
04-03-2021, 04:08 PM
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I haven't used the K200D in a long time, so I'll share some spring sun on flowers in the back yard. ISO320 on the grape hyacinth and daffodil, ISO100 on the tiny buttercup, f5.6 or f8.
-Joe- |
Forum: Pentax DSLR Discussion
04-03-2021, 03:56 PM
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I haven't used the K200D in a long time, so I'll share some spring sun on flowers in the back yard. ISO320 on the grape hyacinth and daffodil, ISO100 on the tiny buttercup, f5.6 or f8.
-Joe-
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Forum: Troubleshooting and Beginner Help
09-24-2020, 12:00 PM
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Mikey,
Unfortunately, that is NOT a Pentax mount. I'm no expert, but am guessing it's some kind of Canon mount. Someone more knowledgeable than me can tell you for certain what kind it is.
If it was sold as a Pentax-mount lens, the seller should accept a return (or refund your money), as it was incorrectly advertised.
-Joe-
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Forum: Digital Processing, Software, and Printing
02-21-2020, 04:37 PM
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Hello, & welcome to the world of modern tech! ;)
I also shoot raw, 100%. For initial screening, I use Faststone Image Viewer (it's free): FastStone Image Viewer, Screen Capture, Photo Resizer ... -- I use Faststone to just browse through the images I download from the camera to cull the obviously-bad ones. Then I use the Pentax Digital Camera Utility (that comes with the camera) to process/tweak the exposure and white balance, exporting the images to a separate folder in high-quality .jpg format. Then I make another pass on the resulting .jpg images with Faststone to crop and resize, exporting to appropriately-sized .jpg images, depending on the intended end use (on-line viewing, printing, further rework). If I will do serious rework on an image, I'll export it as the highest-quality TIFF image and run it through Photoshop where I can work with layers, etc. The Photoshop was a free version of CS2 that was made available online by Adobe a few years ago. However, I rarely need to use Photoshop.
I have experimented with several of the free raw conversion/processing packages (e.g., Raw Therapee, Darktable), and they are good, but I always seem to more-easily get good results from the Pentax DCU.
I hope that helps.
-Joe-
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Forum: Troubleshooting and Beginner Help
12-21-2019, 02:25 PM
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Some ideas to try:
* With the flash off the camera, power on the camera and reset to factory defaults. Then after the reset, turn the camera off, put the flash on, power on the flash FIRST, then power on the camera.
* If the above doesn't fix it, upgrade (or re-install) the latest firmware, then try the above procedure again.
If neither of those work, perhaps your camera has a problem and needs to be sent in for repair. Since the flash works fine on your K30 (I presume you tested it in Av mode there too), it seems likely that the flash is good.
I hope you can get it to work!
Merry Christmas!
-Joe-
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