K1 Monochrome images

biz-engineer · 04-19-2023, 10:01 AM

Originally posted by Medex

Those files are original RAWs, not preprocessed in Mono2DNG converter

Ok. I thought that a monochrome raw wouldn't display correctly with normal raw converter, but it does , except that R,G,B demosaicing is applied on monochrome pixels, negating some of the b&w sensor properties. I tried RT "mono" demosaic , on your files, and it works. I exported two jpegs to compare with / without bayer interpolation.

Last edited by biz-engineer; 04-19-2023 at 10:11 AM.

Medex · 04-19-2023, 11:51 AM

Originally posted by biz-engineer

Ok. I thought that a monochrome raw wouldn't display correctly with normal raw converter, but it does , except that R,G,B demosaicing is applied on monochrome pixels, negating some of the b&w sensor properties. I tried RT "mono" demosaic , on your files, and it works. I exported two jpegs to compare with / without bayer interpolation.

It is almost impossible to see difference on images from K-1 mono with demosaicing and without it if everyday things are shot. The best method to see difference is resolution chart where line pattern is presented.

lesmore49 · 04-19-2023, 03:52 PM

Some great pix, and some great ideas about monochrome conversion.

I'm a long time fan of black and white. Seeing some of the B+W American movies from the '30's and '40's ...the metering, the lighting and the fine B+W moving pictures...continue to inspire me.

gatorguy · 04-19-2023, 04:26 PM - **1 Like**

A range of high ISO's, 40000 / 51200 / 102400 / 204800. Note the grain

Attached Images

View Picture EXIF

View Picture EXIF

btnapa · 04-19-2023, 04:30 PM

Originally posted by Medex

PM sent

Thank you. Responded.

Medex · 04-19-2023, 09:24 PM - **1 Like**

Originally posted by gatorguy

A range of high ISO's, 40000 / 51200 / 102400 / 204800. Note the grain

40000 is a bit "to clean"

For static objects you can try Pixel Shift resolution as well just for sake of experiment. This approach has no practical use though because for static objects we can use tripod and ISO 100.

leekil · 04-22-2023, 07:20 PM

Originally posted by Medex

For static objects you can try Pixel Shift resolution as well just for sake of experiment. This approach has no practical use though because for static objects we can use tripod and ISO 100.

Pixelshift on static objects gives you better quality than non-pixelshift photos.

Basically, the improvement from single-shot to pixel shift is the same resolution improvement from a regular K-3 III to a K-3 III Monochrome.

gatorguy · 04-22-2023, 08:01 PM - **1 Like**

Originally posted by leekil

Pixelshift on static objects gives you better quality than non-pixelshift photos.

Basically, the improvement from single-shot to pixel shift is the same resolution improvement from a regular K-3 III to a K-3 III Monochrome.

...as long as nothing is moving.

The monochrome doesn't care, and as a bonus will have better high ISO performance if you need it.

Even if some do, I would not have a monochrome camera as my only one, and I don't. But now that I've tasted the fruit I'm fairly sure I always will have one.

Medex · 04-22-2023, 10:33 PM

Originally posted by leekil

Pixelshift on static objects gives you better quality than non-pixelshift photos.

Basically, the improvement from single-shot to pixel shift is the same resolution improvement from a regular K-3 III to a K-3 III Monochrome.

I meant that PSR on monochrome camera does not increase details but at high ISO still improves noise characteristics of picture

gatorguy · 04-23-2023, 06:43 PM

Indoor sample at ISO 51200 plus crop section. As shot, no denoise

gatorguy · 05-30-2023, 05:01 PM - **2 Likes**

The lens de jour on the K1 Monochrome: Pentax A16 fisheye

Medex · 05-30-2023, 08:15 PM

Originally posted by gatorguy

The lens de jour on the K1 Monochrome: Pentax A16 fisheye

Fisheye always produces 'different' images. Looks interesting

Medex · 05-30-2023, 09:28 PM - **1 Like**

K-1 monochrome, Studio portrait. Postprocessing.

Medex · 06-02-2023, 10:21 AM - **2 Likes**

---------- Post added 06-02-23 at 08:21 PM ----------

05-30-2023, 05:01 PM - 2 Likes	#26
gatorguy Moderator Join Date: Feb 2015 Location: Central Florida Photos: Gallery Posts: 6,092 Original Poster	The lens de jour on the K1 Monochrome: Pentax A16 fisheye Attached Images

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04-19-2023, 10:01 AM	#16
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,232	Originally posted by Medex Those files are original RAWs, not preprocessed in Mono2DNG converter Ok. I thought that a monochrome raw wouldn't display correctly with normal raw converter, but it does , except that R,G,B demosaicing is applied on monochrome pixels, negating some of the b&w sensor properties. I tried RT "mono" demosaic , on your files, and it works. I exported two jpegs to compare with / without bayer interpolation. Last edited by biz-engineer; 04-19-2023 at 10:11 AM.

04-19-2023, 11:51 AM	#17
Medex Pentaxian Join Date: May 2013 Location: Vilnius Posts: 1,020	Originally posted by biz-engineer Ok. I thought that a monochrome raw wouldn't display correctly with normal raw converter, but it does , except that R,G,B demosaicing is applied on monochrome pixels, negating some of the b&w sensor properties. I tried RT "mono" demosaic , on your files, and it works. I exported two jpegs to compare with / without bayer interpolation. It is almost impossible to see difference on images from K-1 mono with demosaicing and without it if everyday things are shot. The best method to see difference is resolution chart where line pattern is presented.

04-19-2023, 03:52 PM	#18
lesmore49 Pentaxian Join Date: Nov 2007 Location: Western Canada Posts: 12,344	Some great pix, and some great ideas about monochrome conversion. I'm a long time fan of black and white. Seeing some of the B+W American movies from the '30's and '40's ...the metering, the lighting and the fine B+W moving pictures...continue to inspire me.

04-19-2023, 04:30 PM	#20
btnapa Pentaxian Join Date: Oct 2013 Posts: 1,616	Originally posted by Medex PM sent Thank you. Responded.

04-19-2023, 09:24 PM - 1 Like	#21
Medex Pentaxian Join Date: May 2013 Location: Vilnius Posts: 1,020	Originally posted by gatorguy A range of high ISO's, 40000 / 51200 / 102400 / 204800. Note the grain 40000 is a bit "to clean" For static objects you can try Pixel Shift resolution as well just for sake of experiment. This approach has no practical use though because for static objects we can use tripod and ISO 100.

04-22-2023, 07:20 PM	#22
leekil Pentaxian Join Date: May 2016 Photos: Albums Posts: 2,003	Originally posted by Medex For static objects you can try Pixel Shift resolution as well just for sake of experiment. This approach has no practical use though because for static objects we can use tripod and ISO 100. Pixelshift on static objects gives you better quality than non-pixelshift photos. Basically, the improvement from single-shot to pixel shift is the same resolution improvement from a regular K-3 III to a K-3 III Monochrome.

04-22-2023, 08:01 PM - 1 Like	#23
gatorguy Moderator Join Date: Feb 2015 Location: Central Florida Photos: Gallery Posts: 6,092 Original Poster	Originally posted by leekil Pixelshift on static objects gives you better quality than non-pixelshift photos. Basically, the improvement from single-shot to pixel shift is the same resolution improvement from a regular K-3 III to a K-3 III Monochrome. ...as long as nothing is moving. The monochrome doesn't care, and as a bonus will have better high ISO performance if you need it. Even if some do, I would not have a monochrome camera as my only one, and I don't. But now that I've tasted the fruit I'm fairly sure I always will have one.

04-22-2023, 10:33 PM	#24
Medex Pentaxian Join Date: May 2013 Location: Vilnius Posts: 1,020	Originally posted by leekil Pixelshift on static objects gives you better quality than non-pixelshift photos. Basically, the improvement from single-shot to pixel shift is the same resolution improvement from a regular K-3 III to a K-3 III Monochrome. I meant that PSR on monochrome camera does not increase details but at high ISO still improves noise characteristics of picture

05-30-2023, 08:15 PM	#27
Medex Pentaxian Join Date: May 2013 Location: Vilnius Posts: 1,020	Originally posted by gatorguy The lens de jour on the K1 Monochrome: Pentax A16 fisheye Fisheye always produces 'different' images. Looks interesting

05-30-2023, 09:28 PM - 1 Like	#28
Medex Pentaxian Join Date: May 2013 Location: Vilnius Posts: 1,020	K-1 monochrome, Studio portrait. Postprocessing.

06-02-2023, 10:21 AM - 2 Likes	#29
Medex Pentaxian Join Date: May 2013 Location: Vilnius Posts: 1,020	---------- Post added 06-02-23 at 08:21 PM ----------