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Forum: Pentax News and Rumors 12-10-2022, 02:14 AM  
Ricoh CFO: "The time has come for us to choose which businesses to choose,"
Posted By MJKoski
Replies: 152
Views: 12,705
Tamron will be the new host for Pentax of course. Too much lens co-operation already.
Forum: Pentax K-1 & K-1 II 01-01-2022, 03:13 AM  
Slightly burnt edge on my K1 on high iso
Posted By MJKoski
Replies: 18
Views: 1,218
That is typical for the 36MP Sony sensor. Happens with Nikon D8x0 bodies as well which use the same sensor. Amp glow is usually the issue.

There was also an issue with sensor calibration with some early batches of K-1 MK1. This was solved by a service campaign in northern europe (at least Finland/Sweden). Plagued K-1 bodies not only had a bright magenda band on (usually) the top of the image but also a dark band below it.
Forum: Post Your Photos! 12-09-2021, 05:27 AM  
Abstract Pentax.Art
Posted By MJKoski
Replies: 27
Views: 1,650
Yes, the house (it's a sauna cottage) was tilted back in 2017 when I took this composite photo. Some of the supports on which the house was balanced above that rock had collapsed. I have no idea if the building still exists today. Maybe it does. However it got some "unneeded" attention in social media after some people decided to load a number of shots to facebook and instagram. Too bad, one nice location ruined.
Forum: Post Your Photos! 12-08-2021, 01:11 AM  
Abstract Pentax.Art
Posted By MJKoski
Replies: 27
Views: 1,650
Oh, helloes! Not been browsing the forum for a long while. Thanks for looking :)

The process is simple, I put K-1 to interval composite mode and selected average as the method. Then I just entered 600 images as the amount and let the camera to do its job. There seems to be some kind of issue with internal precision with large amount of averaged images. Anything over 256 images is more likely to result in this kind of outcome instead of natural colors IF the images have lot of bright parts in them and have proper base exposure set. Sometimes the averaging however works with huge number of images. I did some 1024x averaged composites with Pentax KP with no issues.

Shutter takes the hit of course if someone is worried about shutter life. I wonder why Pentax did not allow fully electronic exposures with the composite mode. For sure it can be used as pixel shfit already does that.
Forum: General Photography 08-20-2021, 03:00 AM  
Polarizer(s) -the only physical filter you need?
Posted By MJKoski
Replies: 38
Views: 2,111
I would say it is true. (C)PL is all that is needed. Computational photography is the future for a while before real HDR sensors emerge.

Filters are usefull for analog stuff and old dud digital cameras with low DR. Digital B&W is an exception and can use color filters.
Forum: General Photography 08-18-2021, 10:55 AM  
What would you take to a wedding (if you were me)?
Posted By MJKoski
Replies: 35
Views: 1,661
Ya. Just enjoy the party. After always being behind the camera in the past I have just said no for last two years. All the nice moments slip by when one focuses on photo "duty".

"Hey do you remember the night when...?"
- What...uhmm...no? I just took some pictures.
Forum: General Photography 08-18-2021, 07:24 AM  
Lower resolution sensors are not better in low light
Posted By MJKoski
Replies: 51
Views: 3,648
Ya, I was taking a peek at few 400MP pixel-shift capture samples from Fuji GFX100s and tried to downsample them in different ways. I got nice results by halving the resolution step by step until I reached a good target resolution.
Forum: General Photography 08-18-2021, 05:50 AM  
Lower resolution sensors are not better in low light
Posted By MJKoski
Replies: 51
Views: 3,648
This is actually possible. If super high resolution image is downsampled badly either by the person doing the printing or handled badly by the printer driver, the result might be a bit dense. Cramming 400MP to 2MP web size all in one go using standard resizing operations is not very optimal way to do it.
Forum: General Photography 08-17-2021, 10:03 AM  
Lower resolution sensors are not better in low light
Posted By MJKoski
Replies: 51
Views: 3,648
Being able to produce a super detailed large print and look at it at very close distance is one of the reasons for modern separate cameras to even exist this very day.
Forum: Pentax K-1 & K-1 II 05-17-2021, 03:46 PM  
Polish K1 Arca Swiss plate...
Posted By MJKoski
Replies: 22
Views: 1,838
I have a modified Canon 6D L-Plate (Kirk) fitted to my K-1 mk2. It works very nicely if one does not need the ports on the left side of the camera. Does not block battery slot. That said, I'm gonna order this one as the price is very tempting.
Forum: Pentax K-1 & K-1 II 05-07-2021, 04:22 AM  
K-1 i vs K3 III Just discussion.
Posted By MJKoski
Replies: 55
Views: 12,521
(24*16) / (36*24) * 36 -> 16
Forum: Pentax Medium Format 05-07-2021, 03:13 AM  
645 DFA 25mm for infrared?
Posted By MJKoski
Replies: 7
Views: 579
Well that is what I meant. Those drop-in filters are almost the same as back mounted filters. Much better than anything attached to the front.
Forum: Pentax Medium Format 05-07-2021, 12:53 AM  
645 DFA 25mm for infrared?
Posted By MJKoski
Replies: 7
Views: 579
Attaching a filter to the back of the lens should make things better. Front mounted IR filters are all prone to flaring and lower contrast.
Forum: Pentax Medium Format 05-06-2021, 05:42 AM  
Can 645Z live view counter a 9 stop ND filter?
Posted By MJKoski
Replies: 12
Views: 861
You must demand a firmware fix for this. All it needs is a frame accumulator which Sony has in their MILCs (Bright Monitoring). User can then see milky way (or use 15 stop ND) even with a bit dim lens with the liveview. Allthough it might be a bit problematic to expect an update to the Z these days.
Forum: Pentax DSLR Discussion 05-05-2021, 02:02 AM  
K-3 III - Photons to Photos sensor DR measurements
Posted By MJKoski
Replies: 154
Views: 10,663
DxO Deeprime seems to make a mush out of things in that example. Just put the camera on tripod and use ISO100 long exposure. Cameras come and cameras go, tripod is to stay.
Forum: Pentax Medium Format 05-05-2021, 01:59 AM  
Behind the Scenes of "Post your medium format photos!"
Posted By MJKoski
Replies: 109
Views: 11,358
Here is one daily easy scene. Not Pentax though but GFX.



It's a short video clip. Click to play.
Forum: Pentax DSLR Discussion 04-29-2021, 03:52 PM  
K-3 III - Photons to Photos sensor DR measurements
Posted By MJKoski
Replies: 154
Views: 10,663
Pixel-Shift with KP and K-1 MK2 does not do anything weird at ISO100. It looks to be unaffected. So there is clearly a way to switch off this kind of foul filtering, such mandatory option just is missing from the UI.

--EDIT

Forgot to add that I also experimented at ISO800 Pixel-Shift with K-1 MKII and it also looks fine.
Forum: Post Your Photos! 04-26-2021, 02:42 PM  
Pets Fun in the river
Posted By MJKoski
Replies: 23
Views: 747
Good work with the screwdriver macro! I do like it's brutal sharpness but not the AF drive. Anyway, the first BW-conversion just works. It is such cute and thicc!
Forum: Pentax News and Rumors 04-26-2021, 02:39 PM  
D FA 21 Limited is one of the three.
Posted By MJKoski
Replies: 1,748
Views: 145,943
Sure it can. Sensor on the rails and that's it. It should be on the rails right now for it is enough to work the superresolution output. Clever engineers would also dust off that old Contax G -technology and work it a bit so that sensor would move for AF. Lenses would be simple and small. I would say it's very doable these days.
Forum: Pentax DSLR Discussion 04-26-2021, 12:10 PM  
Are cameras getting too boring = sophisticated?
Posted By MJKoski
Replies: 63
Views: 3,971
All automatic gadgets and stuff should be removed from digital cameras and made optional modules purchased separately. Field camera movements should be restored ASAP and made mandatory. That would make photography great again.
Forum: Pentax K-1 & K-1 II 04-26-2021, 07:29 AM  
Pentax K-1 reputation for "bulky and heavy" - is it deserved vs. competing cameras?
Posted By MJKoski
Replies: 133
Views: 14,605
That's where Nikon pulled all the right strings. The button starts glowing with faint blue backlight which does not wreck night vision or act as led torch what the K-1 now does. This needs to be copied in MK3.

D850 is good benchmark. Should MK3 succeed in beating it, don't mind AF though, it is good to go.
Forum: Pentax K-1 & K-1 II 04-25-2021, 08:09 AM  
Pentax K-1 reputation for "bulky and heavy" - is it deserved vs. competing cameras?
Posted By MJKoski
Replies: 133
Views: 14,605
D850 has real backlit buttons. Pentax should replicate that instead of the 2Fast2Furious Honda bling-blong lights under the car.
Forum: Pentax K-1 & K-1 II 04-24-2021, 01:18 PM  
K-1 i vs K3 III Just discussion.
Posted By MJKoski
Replies: 55
Views: 12,521
I have some experience with the 26MP Sony sensor also used in Fuji X-T3+ cameras. K-1 walks over it any time. It is good for APS-C but not so good for long exposures and more extreme pushing. Pixel-Shift will however change things a bit.
Forum: Pentax K-1 & K-1 II 04-24-2021, 01:13 PM  
Leitex zeiss conversion help
Posted By MJKoski
Replies: 10
Views: 743
Leitax has been extremely nice when it comes to support. For example, David made a custom version of the adapter for my full-spectrum K-1 which did not have register distance exactly right after the conversion.
Forum: Pentax K-1 & K-1 II 04-23-2021, 05:43 PM  
Leitex zeiss conversion help
Posted By MJKoski
Replies: 10
Views: 743
I have converted few .ZF1 lenses. For example a .ZF1 28/2 I have here right now. It does not have an aperture locking system. I did not encounter any problems during the conversion other than one lost ball bearing...a replacement came with the adapter though. You can skip all .ZF2 related parts of this guide:

http://leitax.com/conversion/Nikon-Pentax/ZeissZF-Pentax/index.html

Just follow the guide for the parts that are present in your .ZF1 lens.
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