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Forum: Post Your Photos! 12 Hours Ago  
Landscape 30 minutes to sunset (Pentax KP torture test)
Posted By MJKoski
Replies: 11
Views: 166
Rrrright! I promised a series about driving Pentax KP into a state where it could no longer be operated due to frozen controls and lens. For some reason it took two years before I finally started going through the photos shot over the period of one week in absolutely stunning conditions in Finnish Lapland in 2018. I shall write an article about this later when I am done with all the photos I would like to share.

To demonstrate the qualities of light available at this unique location, I will start with kind of harsh afternoon light which quickly turns into dramatic spectacle which then clears up when light starts to fade.

Rising front of snow and harsh wind from the east at the background:


Still blindingly bright light at 180 degrees


The snowfront rises up and starts covering direct sunlight


Magic mushrooms in the snowstorm lit by sunlight from the west


Blinding light straight into sun. Note the flare on foreground coming from my friend's Nikkor 24-70 front lens!!!


And the snowing is over but remaining clouds create some dramatic vistas, particularly when shot using a polarizer


Frozen lens surface is not very effective against bright light


And the day starts slowly fading towards the night






This is the first collection of photos from total of five which I will be posting.
Forum: Pentax News and Rumors 18 Hours Ago  
New information about new flagship's selling date
Posted By MJKoski
Replies: 1,561
Views: 98,256
I think biz is quite right. I used to play that kind of "fool's trade game" until I realized my style always gives me similar input no matter what the device is.

Overall attitude locally in Finland seems similar - it's all about gear even if people cannot admit it in public. "Oh wowzer new MILC lens...maybe I should...no..." and then after a month the same dude has like traded his brains, identity and gear at the same time.
Forum: Pentax News and Rumors 23 Hours Ago  
New information about new flagship's selling date
Posted By MJKoski
Replies: 1,561
Views: 98,256
Awww, sir, I do like K-1 a lot. I have now owned K-1 MKII for almost two years far surpassing any period of owning other brand gear. Heck, it is almost four years combined I have used Pentax gear in a row starting from K-1 MK1. But I still think MKII was slacking a bit compared to MK1 release. 61MP Sony sensor would do wonders with properly implemented Pixel-Shift (which Sony failed to do). But that is yet another case where processing power needs a large boost over current technology.
Forum: Pentax News and Rumors 1 Day Ago  
New information about new flagship's selling date
Posted By MJKoski
Replies: 1,561
Views: 98,256
Of course they must upgrade the image processing pipeline. It is just that 36MP is getting a bit long in the tooth and K-1 should be the flagship product considering IQ (and price).
Forum: Pentax News and Rumors 1 Day Ago  
New information about new flagship's selling date
Posted By MJKoski
Replies: 1,561
Views: 98,256
It is clear that there is no real date available to public. Thus, Pentax should cancel this APS-C thing and announce K-1 MK3 using the new 61MP Sony sensor. MK2 is 2-year old re-released MK1 with an extra sugar coating on top of the cake.
Forum: Pentax K-1 02-11-2020, 11:53 AM  
Downsizing from K-1but what to ?
Posted By MJKoski
Replies: 43
Views: 1,439
KP needs 35mm macro ltd to shine. I would say that combination is one of the best ever during digital age of photography considering IQ, utility, cost and weight. Tilting screen and pixel-shift seal the deal.
Forum: Post Your Photos! 02-06-2020, 08:04 AM  
Abstract Crimson Whirpool
Posted By MJKoski
Replies: 8
Views: 244
Thanks for the correct terminology :) The water comes in from the left and then starts going in clockwise motion around the pool.
Forum: Pentax DSLR Discussion 02-05-2020, 11:39 AM  
Have you experienced pressure to switch systems?
Posted By MJKoski
Replies: 45
Views: 1,904
In the end, no brand matters when it comes to images one gets or not. I have swapped all my gear quite a few times only to find myself shooting the same things I did before the swap. I started with Pentax and now I have...Pentax. And few other cameras including film stuff. It is shame that modern digital photography scene runs circles around gear year after year.
Forum: Post Your Photos! 02-05-2020, 05:45 AM  
Abstract Crimson Whirpool
Posted By MJKoski
Replies: 8
Views: 244
Thank you. I also took one multiexposure where I used Bright-stacking mode for the whirlpool part. It is quite a good use case for this scene. Maybe I will include that here as well.
Forum: Post Your Photos! 02-05-2020, 04:51 AM  
Abstract Crimson Whirpool
Posted By MJKoski
Replies: 8
Views: 244
Thanks. My theory is that cold days produce lot of new ice somewhere up the river and as the flow of water is quite strong they break off and start their journey down the stream eventually ending up at this junction point. The whirpool itself keeps running as the there are rapids pushing high volumes of water downstream where the flow then hits 90 degree turn and starts circular motion around the small pond.

It is hypnotic to watch.

That little cabin has extremely sturdy construction and has been there for decades. It is relatively safe from flooding as it is actually several meters above the surface of water.
Forum: Post Your Photos! 02-04-2020, 04:45 PM  
Abstract Crimson Whirpool
Posted By MJKoski
Replies: 8
Views: 244
I was playing with snow and cameras for a week again. I visited one of my favorite places, the whirlpool of ice during few cloudy and overcast (or so it seemed to naked eye). The amount of ice chunks varies quite a bit and seems to have a relation with cold temperatures. After a period of extremely cold days, the pieces of ice really stack up and get stuck in a loop.



This time, I attached Kolari's IR-Chrome filter to Samyang 24mm T/S and had some fun with the crimson trees which popped quite nicely against the bright white snow covered parts. IR-Chrome filter also allowed to expose the bluish tones of sky behind the thick gray cover of clouds.

Vertical shift panorama of two images. Bottom half is 128x in-camera averaged multi-exposure. Full-Spectrum K-1 MKII with KolariVision IR-Chrome filter.
Forum: Pentax K-1 01-23-2020, 04:51 PM  
What made you decide to purchase the K-1 over the KP?
Posted By MJKoski
Replies: 32
Views: 1,634
8K. Since D800E I have demanded 8K resolution from my main camera system. I have K-1 for full-spectrum photography, be it infrared, UV or everything (KolariVision IR-Chrome filter). Infrared makes full use of pixel-shift where I can have clean red channel. Large sensor brings light collection advantage and it really counts in infrared.

Other than that, I use Zeiss .ZK and converted .ZF lenses a lot. And print very large.

Nothing really wrong with KP and certain limiteds, for example 35mm ltd macro. I used that combo a lot.
Forum: Pentax SLR Lens Discussion 01-22-2020, 08:15 AM  
D FA 28-105 WR in the extreme cold?
Posted By MJKoski
Replies: 15
Views: 927
RGlasel already replied with -37C experience and it is more extreme what I have tried with DFA-lens. DFA 15-30 WR worked nicely @ -29C as long as photographer and batteries worked (hours). AF became a "bit stiff" (as with all lenses) but I used MF all the time. No experience with 28-105 WR.

In general all lenses I have tried have worked down to -35C fine when doing things manually. Canon, Nikon, Sony A/FE, Zeiss and Pentax. But...be aware of focus-by-wire lenses as they use AF-motor to focus even when focusing manually!!! For example Sony 16-35/4 FE became very slow to focus below -30C but it did focus after a short delay.

Modern Samyang lenses can be troublemakers. I have experienced aperture jam with 10/2.8 and 35/1.4 PK-lenses lenses due to spring loaded aperture lever action failing / getting stuck in moderately cold temperatures. This has not happened with my older Samyang lenses before when I used Nikon gear. Someone is saving costs clearly these days...
Forum: Pentax K-1 01-17-2020, 05:50 AM  
Have you ever pixel mapped the K -1 sensor?
Posted By MJKoski
Replies: 19
Views: 982
They may have something to do with this. After the mapping I have another bunch of pixels appearing now :/

Or maybe the full-spectrum mod killed it.
Forum: Post Your Photos! 01-13-2020, 03:13 PM  
Macro Flying Carpet
Posted By MJKoski
Replies: 2
Views: 195
Plush thing. It is some kind of noctuid moth species I located hanging on the walls during the wintertime in an old abandoned underground military construction. Practically a huge cave.



8x20sec stacked exposures taken in candlelight. Just one candle. Two candles = subject flew away. Full-Spectrum converted K-1 MKII and KolariVision IR-Chrome filter on 100mm WR Macro.

Subject is not critically sharp everywhere. There was minor movement of air inside the cave which caused the wing surface to vibrate a bit during the exposures.

--

I learned that the species is: https://en.wikipedia.org/wiki/Triphosa_dubitata

So not a noctuid moth after all.
Forum: Post Your Photos! 01-13-2020, 03:03 PM  
Black & White Hallway being
Posted By MJKoski
Replies: 8
Views: 275
This is something from Rick & Morty for sure.
Forum: Post Your Photos! 01-13-2020, 02:59 PM  
Landscape Highlands of Dolpo, Nepal
Posted By MJKoski
Replies: 8
Views: 333
Oh yeah! Fantastic fleeting light captured here. It surely does add another dimension to already dramatic scenery.
Forum: Pentax K-1 01-13-2020, 02:57 PM  
Shutter skipping and failure.
Posted By MJKoski
Replies: 10
Views: 590
Beware of activating the pixel shift in accident. It will make shutter look like stuck and result in a black screen when exposure times are longer. I have done this too many times unintentionally.
Forum: Pentax K-1 01-05-2020, 02:46 PM  
Bulb exposure single shot causes multiexposure
Posted By MJKoski
Replies: 5
Views: 368
Right. I think I have better explanation of what happened. I exposed for 3996 + 99 seconds. Say what? Well today I exposed another long bulb exposure by just using the camera body shutter release with two clicks. It seems that internal exposure counter only runs up to 999 seconds (or some other 3 digit number) and then starts over from zero. So, for the Stargate-photo the counter went from 999 to zero four times and I ended up with 99 second dark frame in the end. There was no double exposure but instead I just repositioned then camera in the end so quickly that ISO100 did not cause any streaking in the photo. And when I clicked the shutter release on the body it just ended the long exposure and 2nd click did nothing as LENR phase had already began.

My new experiment gave me 375 second exposure length in EXIF when in reality I exposed for 2997 + 375 seconds which I clocked with an app in my phone. LENR ran for 375 seconds as well.

It would be nice to get a fix for this Pentax, please. They simply cannot have this kind of "bug" or feature in a flagship camera body. 99 seconds is not correct dark frame length for 4095 second long exposure. What is funny, I may even have encountered this years ago but did not remember it anymore after countless stacks of 30 sec exposures.
Forum: Post Your Photos! 01-04-2020, 06:18 AM  
Abstract Stargate
Posted By MJKoski
Replies: 14
Views: 270
I tried to replicate this with short exposures (up to 10 seconds) and was not able to reproduce the effect. LENR starts counting instantly when shutter release is triggered 2nd time. What remains is trying to replicate with the original setup (~1 hour long exposure and then triggering a short one).

But for what it is worth, multi-exposure with "Additive" mode gives the same outcome with any length exposure allowing double, or greater, number of exposures on top of each other without extra trickery.
Forum: Pentax K-1 01-04-2020, 05:28 AM  
In Camera Focus Stacking in the K-1?
Posted By MJKoski
Replies: 20
Views: 4,408
Some Canon bodies can use Magic Lantern to get some very nice focus bracketing modes. Focus bracketing included in D850 is taken further in Z7 (&6?) in a way that camera display an estimate of the end result before taking the exposures.
Forum: Post Your Photos! 01-03-2020, 06:47 AM  
Landscape "Irreparable cracks", in Asturias (Spain)
Posted By MJKoski
Replies: 17
Views: 891
This is indeed about form and direction. Sculpture made by Time itself.
Forum: Post Your Photos! 01-02-2020, 04:51 PM  
Abstract Stargate
Posted By MJKoski
Replies: 14
Views: 270
Thank you for feedback and ideas. Yes, the setting can be changed between two presses and one long press. I had changed it to two press mode but did not remember it at all and tried to use it as one long press (locking the remote release to shooting position first for one long exposure).
Forum: Post Your Photos! 01-02-2020, 02:00 PM  
Abstract Stargate
Posted By MJKoski
Replies: 14
Views: 270
Hmm, doesn't multi-exposure with "Additive" -mode do that? I dunno, never tried that mode as I have always used either average or bright. But anyway, this undocumented feature allows for doubling exposure time with LENR working only for half the amount of the exposure. Like, say, one takes 1 + 1 hour long trails but gets away with 1 hour dark frame (which removes most of the noise anyway). Here, 99 second LENR calculation did not do very good job of handling the long exposure and 100% crop is kind of noisy.

And sure, this gives double exposure as well.

I would like to have electronic shutter for multi-exposures too. It would have good enough IQ when used with short exposures. But that is another conversation altogether.
Forum: Post Your Photos! 01-02-2020, 12:50 PM  
Abstract Stargate
Posted By MJKoski
Replies: 14
Views: 270
Now here is a bugger. This is about the weird behavior of K-1 (mkII) when used in bulb mode and bulb mode is set to activate with one shutter press and stop the exposure with another press. In short, here is what happened:

0) I set camera to single shot mode
1) I enabled LENR
2) I started ~hour long exposure in bulb mode with remote release by locking it to shooting position but did not release
3) After an hour I released the remote shutter from shooting position and nothing seemed to happen
4) Right...I forgot to just press once to start the exposure
5) I pointed the camera forwards and released shutter once from the camera body, not the remote release
6) I heard shutter clack...
7) I clicked the shutter release on camera body after 99 seconds
8) No way...camera started to count down from 99 seconds for the LENR

I expected to get one messed up 99 second bulb exposure but instead I got this (converted to B&W):



That is not 99 second bulb exposure. It is two exposures in one frame with EXIF having 99 seconds as exposure time.
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