K-1 Dynamic Range


kea828

Link Posted 09/05/2016 - 21:28
DP Review have just published a test of the K-1's dynamic range and say that it is one of the best ever. The article's heading says that it is getting close to the dynamic range available from medium fomat cameras. The pixel-shift feature is a major contributor to this result.

This got me thinking. Pixel-shifting is effective primarily when the camera is on a tripod. Being somewhat heavier, 645Zs are likely to be used on tripod for a greater proportion of their time, so I reckon we will see the pixel-shift feature appear on that in its next upgrade, offering an even better degree of dynamic range.
Regards,
Kea828

Conqueror

Link Posted 09/05/2016 - 21:35
There must be something wrong somewhere
K-3ii

joostdh

Link Posted 09/05/2016 - 21:48
Pixel shift requires to move the sensor about. Obviously that is built in to the K-3 and K-1 - for the SR - but not in the 645Z.

Pentax documents the challenge of building the sensor shift tech for a full frame sensor on the special K-1 site. As the sensor is heavier and larger than the one in the aps-c camera, simply upscaling everything was not an option.

This is not to say they can't do it for a MF sensor but I'm sure it would provide a considerable challenge.
Pentax K-1| Pentax K-01 | D-FA 28-105mm | FA 28mm F2.8 | FA 35mm F2.0 | FA 43mm F1.9 Ltd | FA 50mm F1.4 | FA 50mm F2.8 Macro | FA* 85mm F1.4 | FA 100mm F2.8 Macro | DA* 200mm F2.8 | Pentax AF 540FGZ

womble

Link Posted 13/05/2016 - 12:49
How interesting. I hadn't appreciated that pixel-shift would have this sort of impact. Mind you, I'm more concerned about the impact on my hard disks....!
Kris Lockyear
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.

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McGregNi

Link Posted 13/05/2016 - 13:15
I worked on a sample pixel shift image just today .... Original out of camera file was 180mb, and my saved Master Tiff after RAW conversion in Sagelight 4.4 was 418mb !!
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

CiderDrinker

Link Posted 13/05/2016 - 14:11
Just shut up now and take my money

No really, do I trade in my K3II, keep the K5-IIs and buy a K-1?

Can I really justify keeping 3 bodies
Digital: Pentax K-1 II + Grip, Pentax K3II + Grip, Pentax MX-1.
Lenses: Pentax D-FA 24-70mm 2.8, D-FA 15-30 2.8, D-FA 70-200 2.8*, Pentax 35mm 2.4, 50mm 1.8, 18-135mm WR, 55-300mm HD, Sigma 70-300mm (macro), Tamron 17-50mm F2.8.
Film: Mamiya C330 Medium Format, Pentax Super ME.
Last Edited by CiderDrinker on 13/05/2016 - 14:12

McGregNi

Link Posted 13/05/2016 - 14:21
I would trade in the K5IIs ... In crop mode the K-1 provides fairly similar resolution anyway. I can understand someone also wanting a K3 as well, for the extra resolution it offers, say for telephoto shots cropped more heavily.
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

CiderDrinker

Link Posted 13/05/2016 - 23:32
I tend to grab the K5IIs for low light work, I have been doing a bit of band photography and the K5II seems to get better results.

https://www.facebook.com/media/set/edit/a.196481027403382.1073741829.15190222519...
Digital: Pentax K-1 II + Grip, Pentax K3II + Grip, Pentax MX-1.
Lenses: Pentax D-FA 24-70mm 2.8, D-FA 15-30 2.8, D-FA 70-200 2.8*, Pentax 35mm 2.4, 50mm 1.8, 18-135mm WR, 55-300mm HD, Sigma 70-300mm (macro), Tamron 17-50mm F2.8.
Film: Mamiya C330 Medium Format, Pentax Super ME.

Rabski

Link Posted 13/05/2016 - 23:49
Full frame will inherently be better for low light.

I am financially unable at the present, but given a 5II and K3, I'd sell them both to buy the K-1.

You can't take pictures with two cameras at the same time, so why not just have one that does it all?
K5. 35mm, 18-55mm, 50-200mm. Assorted old film stuff including a collection of early folding 120 things, and a much loved OM1 with assorted Zuiko glass.

CiderDrinker

Link Posted 14/05/2016 - 00:14
Rabski wrote:
You can't take pictures with two cameras at the same time, so why not just have one that does it all?

Well I do use a blackrapid double strap

Also I do like having a backup camera.
Digital: Pentax K-1 II + Grip, Pentax K3II + Grip, Pentax MX-1.
Lenses: Pentax D-FA 24-70mm 2.8, D-FA 15-30 2.8, D-FA 70-200 2.8*, Pentax 35mm 2.4, 50mm 1.8, 18-135mm WR, 55-300mm HD, Sigma 70-300mm (macro), Tamron 17-50mm F2.8.
Film: Mamiya C330 Medium Format, Pentax Super ME.

pentaxian450

Link Posted 14/05/2016 - 11:04
Rabski wrote:
Full frame will inherently be better for low light.

Not always. If you had a FF with the same pixel size and ratio as the K3, the low light results would be quite similar (barring any change in the camera processor).
Yves (another one of those crazy Canucks)
Last Edited by pentaxian450 on 14/05/2016 - 11:04

philstaff

Link Posted 14/05/2016 - 13:40
joostdh wrote:
Pixel shift requires to move the sensor about. Obviously that is built in to the K-3 and K-1 - for the SR - but not in the 645Z.

Pentax documents the challenge of building the sensor shift tech for a full frame sensor on the special K-1 site. As the sensor is heavier and larger than the one in the aps-c camera, simply upscaling everything was not an option.

This is not to say they can't do it for a MF sensor but I'm sure it would provide a considerable challenge.

Pixel shift requires to move the sensor about. Obviously that is built in to the K-3 and K-1 - for the SR - but not in the 645Z.

I think the pixel shift is only on the K3 11.
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