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Forum: Lens Clubs 08-23-2017, 07:28 AM  
Takumar club
Posted By k0og
Replies: 15,238
Views: 2,635,511
Here is another photograph taken with my Tele-Takumar 300mm f6.3 @ f22 on a 2x teleconverter, stacked with several filters to attenuate the sun: two 4x ND, one 2x ND, one circular polarizer, one linear polarizer, mounted on a K5 on a tripod, 1/8000 sec, ISO80, daylight white balance. A small cloud was approaching the sun, so I quickly positioned myself to take some photographs during its passage, and here is one of the shots. It gives it a dirty, eerie appearance.

-Joe-
Forum: Lens Clubs 08-21-2017, 07:08 AM  
Takumar club
Posted By k0og
Replies: 15,238
Views: 2,635,511
Getting ready to take some photos of the eclipse. I'm NOT traveling anywhere, but just going into my yard at my house here in Rolla. The effect will be plenty good here to enjoy it. Here is my first test shot - Pentax K5, Tele-Takumar 300mm f6.3 lens, stacked on a 2x teleconverter for 600mm, lens stopped down to f22, with a stack of filters fitted to the front: two 4x ND, one 2x ND, one circular polarizer, one linear polarizer. This is just what I had, and it works! ISO80, 1/8000 sec., handheld. Notice the sun spots clearly visible across the face of the sun.

UPDATE: Lesson learned - CHECK YOUR SENSOR! The "sunspot" in the lower-right quadrant is a dust particle on my sensor. After cleaning my sensor, it's all good now. Here is a new image with a clean sensor, this time in color (daylight white balance).
Forum: Pentax K-30 & K-50 06-09-2017, 03:20 PM  
K50: Programs to open .DNG files?
Posted By k0og
Replies: 30
Views: 1,437
By the way... I do all this on a very old single-core Windows XP PC with 1.5GB RAM (but a 1.5TB hybrid disk), and it works fine for me. Sure, a new many-core PC with huge amounts of RAM would be faster, but not worth the expenditure for me. I just queue everything up and let it process for a while, no problem. If I were in it for commercial purposes where my processing time equates to profit, I would buy a new PC. But I'm retired, so why rush... ;)

-Joe-
Forum: Lens Clubs 06-08-2017, 07:03 PM  
The FA Un-Limited Club
Posted By k0og
Replies: 433
Views: 89,728
Late afternoon flower with the K-30 & FA24-90 @ 90mm, f8.

-Joe-
Forum: Pentax K-30 & K-50 06-08-2017, 07:49 AM  
K50: Programs to open .DNG files?
Posted By k0og
Replies: 30
Views: 1,437
My process is this...

1) Copy files from the camera to a folder on my PC
2) Open the folder using Faststone to do a quick review and cull the obvious bad ones
3) Open Pentax Silkypix (that came with the camera) and make any necessary adjustments to images that need it (especially white balance, exposure, and curves/levels)
4) Develop all images in the folder to a subfolder as .jpg images (including images that did not require adjustment)
5) Open the processed images folder of .jpgs with Faststone to rotate or crop any images if necessary, then batch process the whole lot to resize and apply a little sharpening after resizing

This makes for a fairly quick process since I make use of batch processing in Silkypix and Faststone. In Silkypix, it is sometimes very helpful to copy/paste processing parameters to groups of pictures that need it (for example, a group that needs a white balance adjustment). I find that doing development in the Pentax Silkypix provides the best-quality output, better than Adobe Camera Raw or Raw Therapee. I think the reason is that the Pentax Silkypix applies all the in-camera settings more accurately. This seems to give me the best dynamic range and fewer artifacts as compared to other methods.

-Joe-
Forum: Pentax K-30 & K-50 06-08-2017, 07:36 AM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
This is not a bug, but is behavior controlled by the settings in the "Memory" setting in menu 4 on the first menu tab. In page 2 of the Memory settings, put a check mark in the "Shooting Info Display" for it to save that setting between power cycles.

-Joe-
Forum: Product Suggestions and Feedback 05-22-2017, 07:27 AM  
KAF4 support for K-5 and K-5II series
Posted By k0og
Replies: 14
Views: 1,714
There *IS* "unofficial" support for KAF4 for the K-30: Read this thread...
Running K-50 firmware on K-30 - PentaxForums.com

Now, if some enterprising individual could do this for the K-5 family, it would be nice!

-Joe-
Forum: Pentax Film SLR Discussion 05-19-2017, 06:05 AM  
Dark Negatives
Posted By k0og
Replies: 24
Views: 1,024
Your more recent exposures do seem under-exposed by a stop or two, but are still quite useable. Here is a quick edit of your first exposure (some curves and levels adjustment), and there seems to be good detail in both the highlights and shadows, even on the .jpg image you posted. I don't think you are very far off. As others have suggested, compare your Spotmatic metering with your DSLR metering to see if it might be off a little. Otherwise, you are getting nice results with your process!

-Joe-
Forum: General Photography 05-02-2017, 05:42 AM  
100 Days of Trumpís Washington [non-political]
Posted By k0og
Replies: 22
Views: 1,310
...and in my opinion, the "affectation" worked with these images. In most of these images, I believe color (colour? ;) ) would have distracted from the mood - a dark, foreboding quality of the scenes.

-Joe-
Forum: General Photography 05-01-2017, 01:49 PM  
100 Days of Trumpís Washington [non-political]
Posted By k0og
Replies: 22
Views: 1,310
John,

Politics is a "gritty" business, and I like the "gritty" processing of the photographs. It fits. I think they are well done and interesting.

Of course, I'm curious about the equipment used...

Thanks for posting the link.

-Joe-
Forum: Pentax K-30 & K-50 05-01-2017, 09:56 AM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
Colin,

Looking at my K-30 with the K-50 firmware installed, I indeed can change the file-name prefix to any four characters of my choice (from a palette of all-capital letters and numbers). I confirmed this by changing the menu "Wrench" icon->2->File Name from the default "IMGP" to something else. When I exit the menu after making the change and take a picture, indeed I observed when I transferred the picture to my computer that the file name followed the new convention I programmed.

Confirmed - it does work.

-Joe-
Forum: Pentax K-30 & K-50 04-29-2017, 04:12 PM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
As a followup: The K-30 has been working perfectly using the firmware that identifies as a K-30. I rarely take videos, but did so yesterday and it worked well, using a fully-manual lens, and shake reduction helped stabilize the video.

-Joe-
Forum: Pentax K-30 & K-50 04-19-2017, 11:11 AM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
Thanks! I'll try it...

=====

I followed your simple procedure using the "fake" firmware as intermediary, and it worked perfectly, and now identifies as a K-30, but with enhanced K-50 features.

Thanks!

-Joe-
Forum: Pentax K-30 & K-50 04-19-2017, 06:54 AM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
Alex,

Thanks for the alternative to identify as "K-30". Can you post the instructions to this discussion thread for reverting from the K-50 version?

-Joe-
Forum: Pentax K-30 & K-50 04-17-2017, 10:46 AM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
Thanks Alex for explaining this.

-Joe-
Forum: Pentax K-30 & K-50 04-17-2017, 10:21 AM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
Greetings,

Firstly, I have not noticed any problem with autofocus. I simply have a question based upon comparative specifications from:

Pentax K-30 vs. Pentax K-50 vs. Pentax K-5 - Pentax Camera Comparison - PentaxForums.com

(Note: I put the K-5 in the third column only because that is the other body I regularly use.)

Comparing the two cameras, I see that with the K-50 there are more scene modes, the KAF4 mount is supported with the latest K-50 firmware, and there is a difference in the autofocus sensing. Here is the relevant line:

Autofocus (viewfinder)...
K-30: Yes (SAFOX IXi+, 11 focus points (9 cross type), diffraction lens)

K-50: Yes (SAFOX IXi+, 11 focus points (9 cross type), diffraction lens, wavelength sensor)

As you can see, the K-50 is noted as having a wavelength sensor in the AF system, whereas the K-30 is not. Is this an error, or is there really this hardware difference?

If there is this hardware difference, could this cause any problem with running the K-50 firmware on the K-30?

Again, I have not noticed any problem with AF, even indoors under tungsten lighting, so I suspect that the K-30 may have the wavelength sensor but that the specification listing is incorrect.

Thanks.
-Joe-
Forum: Lens Clubs 04-17-2017, 08:31 AM  
The K-Club!
Posted By k0og
Replies: 3,006
Views: 442,506
The dogwoods are now in bloom in the Ozarks - pretty spring weather this year! Probably shot at f1.8 or f2.0.


(SMC-P K 55mm f1.8)

-Joe-
(Cross-posted from the Bokeh club)
Forum: Pentax K-30 & K-50 04-16-2017, 01:52 PM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
Today I used my modified K-30 (now a K-40?) to take photographs of our Resurrection Sunday activities. It worked flawlessly! Since the photographs are "snapshot" style, I used my FA 24-90 zoom lens, and shot in Av mode.

Here is a sample of a wildflower outside the church, ISO1600, processed with Silkypix for the K-30/K-50. As you can see from the EXIF data, it's identified as a K-50.

-Joe-
Forum: Pentax K-30 & K-50 04-14-2017, 07:47 PM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
That looks good ABel. Even the f32 image is not too far off. It's possible that the aperture of f32 in the lens is not really f32 but something even smaller since it's at the extreme and may be difficult to calibrate. What I'm suggesting is that the error might not even be due to the camera, but the lens.

-Joe-
Forum: Pentax K-30 & K-50 04-14-2017, 06:53 PM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
There you go - good suggestion Jeff!

I loaded it, and it works GREAT! I tested it with an AF lens (FA24-90), Pentax-M 35mm f2.8, and Super-Takumar 35mm f3.5, and it works PERFECTLY with all three!

There are some positive things I notice. These are just impressions, and not technically measured. After such positive results, I'm not inclined to revert to the old K-30 firmware.

1) The camera seems slightly "quicker" with the new firmware. I shoot in raw, and the files seem to write a little quicker to the SD card after exposure. Autofocus seems to lock a little quicker and more positively in low light.

2) The noise at high ISO seems to be a little finer grained, or perhaps just less noise. This is with the high-ISO NR settings the same as what I had in the 1.06 firmware.

3) Shooting with M42 lenses does not require a little exposure boost, as it did with the K-30 firmware. Oddly enough, my old (now dead) actual K-50 also required a little exposure boost (either in-camera or in post processing) when using M42 lenses, but this "K-40" configuration gives me accurate exposure with the M42 lens. However, before my old K-50 died, it was running an older firmware, so possibly the 1.10 firmware addressed the M42 lens under-exposure issue.

So far, so good. In just rattling off some shots around the house to test, it seemed to perform with no hiccups.

Thanks much to ABel for providing this special firmware, and for the other early (brave) testers. I'll enjoy my "new K-40" :D ...

-Joe-
Forum: Pentax K-30 & K-50 04-14-2017, 05:17 PM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
Niceshot & Jeff - thanks!

O.k., here goes....

-Joe-

P.S. Afterwards, what shall I indicate in my signature? K-30, K-50, K-30/50 (reduced to K-3/5 or K-.6)? ;)
Forum: Pentax K-30 & K-50 04-14-2017, 03:12 PM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
Thanks Jeff! The results look good - as good as I can get from my K30 and K5.

By the way, nice looking flower and photos.

Now, it would be nice to know how it works with M42 lenses. Maybe I'll have to be the one to test that if none of the others who already have the firmware installed can do so.

-Joe-
Forum: Pentax K-30 & K-50 04-14-2017, 11:41 AM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
If you take the Pentax-A lens out of "A" mode and use it fully manually, with the new firmware does the "green button" stop-down metering work properly with the aperture ring at various f-stops?

Similarly, with an M42 lens in place, which will not make contact with the electrical contacts in the mount, does green-button mode work properly?

With the camera in Av mode with an M42 lens in place, does Av metering work properly at various f-stops?

If the camera works properly with M42 lenses when tested as above, does it do so accurately (without the need for exposure compensation like some older bodies require)?

Thanks.
-Joe-
Forum: Pentax SLR Lens Discussion 04-14-2017, 08:04 AM  
The Bokeh Club
Posted By k0og
Replies: 10,422
Views: 1,025,658
The dogwoods are now in bloom in the Ozarks - pretty spring weather this year! Probably shot at f1.8 or f2.0.

-Joe-
Forum: Pentax K-30 & K-50 04-14-2017, 07:46 AM  
Running K-50 firmware on K-30
Posted By k0og
Replies: 122
Views: 14,316
Has anyone tried using fully-manual (M42 and K-mount) lenses after installing this modification? I frequently use manual lenses, and would like to make sure I don't lose that capability before I try the update.

Thanks.
-Joe-
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