Pentax K-1 II ISO test images

derekkite · 04-01-2018, 08:41 PM

Originally posted by tungal

Can add the example of banding due to pair of ordinary LED’s a bit later. ISO 12800, F4, Pentax 60-250 @200.

I’ve shot on K-1 almost 10 thousand frames under every kind of circumstances but never experienced anything similar. Despite of that and better ISO performance of Mk II I stuck to K-1 and not gonna spend 500,- for upgrade. The tests also proved that K-1 is very powerful camera.

---------- Post added 02-04-18 at 05:29 ----------

Could you clarify? Above you said that the K1 had trouble with the LED but not the mark II. Is this a different situation?

Thanks for this. I know how much time it takes to do this type of testing well.

**tungal** · 04-02-2018, 01:42 AM

Yes, I finished serie of testshots with MkII and started the same absolutely under same conditions with K-1 and then it started appear - as shutterspeed and ISO rose, the moreevident stripes appeared on light areas. I’ve done many photos in same room and lightning, perhaps just camera settings or angle of light were different. As I changed lights, there were not such problem with K-1.

I just uploaded sample photo to my last post on previous page. Take a look!

**Ex Finn.** · 04-02-2018, 06:30 PM

Originally posted by tungal

there were not such problem with K-1

Pretty sure I have seen that striping with K1, most definitely with KP with LED lighting. Some shutter speeds do not get along with PWM of LED`s.
edit: the 60 Hz switching frequency.

Rico · 05-15-2018, 08:44 PM

Originally posted by Ex Finn.

Pretty sure I have seen that striping with K1, most definitely with KP with LED lighting. Some shutter speeds do not get along with PWM of LED`s.

I have seen this also. It may be due to using live view and the electronic shutter.

pentaxfall · 05-15-2018, 09:04 PM

Originally posted by tungal

Can add the example of banding due to pair of ordinary LED’s a bit later. ISO 12800, F4, Pentax 60-250 @200.

I’ve shot on K-1 almost 10 thousand frames under every kind of circumstances but never experienced anything similar. Despite of that and better ISO performance of Mk II I stuck to K-1 and not gonna spend 500,- for upgrade. The tests also proved that K-1 is very powerful camera.

---------- Post added 02-04-18 at 05:29 ----------

I have seen this bands on K1 also. I was using CFL bulbs.

**tungal** · 08-16-2018, 12:04 AM

Coming back to this old thread with a bit different question. On previous page I demonstrated the banding artefact of K-1 under certain LED-lights. But more vitable for me is the behaviour of camera regard to COLOUR-BANDING. Have anybody tested or knows, is K-1 MkII better at this point?

**BigMackCam** · 08-16-2018, 03:24 AM - **1 Like**

Originally posted by tungal

Coming back to this old thread with a bit different question. On previous page I demonstrated the banding artefact of K-1 under certain LED-lights. But more vitable for me is the behaviour of camera regard to COLOUR-BANDING. Have anybody tested or knows, is K-1 MkII better at this point?

Just to be clear, the banding artefact you demonstrated isn't unique to the K-1. It's a well-known product of pulsed lighting combined with rolling shutter, the effects of which will vary with the pulse frequency and shutter speed.

**tungal** · 08-16-2018, 09:23 AM

Originally posted by BigMackCam

Just to be clear, the banding artefact you demonstrated isn't unique to the K-1. It's a well-known product of pulsed lighting combined with rolling shutter, the effects of which will vary with the pulse frequency and shutter speed.

Yes, of course (just MkII handles it better). E.g. it occurs when you don't synchronise shutter speed with flashlight (or vice versa :-))

04-02-2018, 06:30 PM	#63
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	Originally posted by tungal there were not such problem with K-1 Pretty sure I have seen that striping with K1, most definitely with KP with LED lighting. Some shutter speeds do not get along with PWM of LED`s. edit: the 60 Hz switching frequency. Last edited by Ex Finn.; 05-16-2018 at 03:28 AM. Reason: PWM to 60 Hz.

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04-01-2018, 08:41 PM	#61
derekkite Pentaxian Join Date: Sep 2011 Location: Nelson B.C. Posts: 3,782	Originally posted by tungal Can add the example of banding due to pair of ordinary LED’s a bit later. ISO 12800, F4, Pentax 60-250 @200. I’ve shot on K-1 almost 10 thousand frames under every kind of circumstances but never experienced anything similar. Despite of that and better ISO performance of Mk II I stuck to K-1 and not gonna spend 500,- for upgrade. The tests also proved that K-1 is very powerful camera. ---------- Post added 02-04-18 at 05:29 ---------- Could you clarify? Above you said that the K1 had trouble with the LED but not the mark II. Is this a different situation? Thanks for this. I know how much time it takes to do this type of testing well.

04-02-2018, 01:42 AM	#62
tungal Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery Posts: 398	Yes, I finished serie of testshots with MkII and started the same absolutely under same conditions with K-1 and then it started appear - as shutterspeed and ISO rose, the moreevident stripes appeared on light areas. I’ve done many photos in same room and lightning, perhaps just camera settings or angle of light were different. As I changed lights, there were not such problem with K-1. I just uploaded sample photo to my last post on previous page. Take a look!

05-15-2018, 08:44 PM	#64
Rico Veteran Member Join Date: Mar 2007 Posts: 1,204	Originally posted by Ex Finn. Pretty sure I have seen that striping with K1, most definitely with KP with LED lighting. Some shutter speeds do not get along with PWM of LED`s. I have seen this also. It may be due to using live view and the electronic shutter.

05-15-2018, 09:04 PM	#65
pentaxfall Veteran Member Join Date: Sep 2017 Location: Bangalore, India Posts: 581	Originally posted by tungal Can add the example of banding due to pair of ordinary LED’s a bit later. ISO 12800, F4, Pentax 60-250 @200. I’ve shot on K-1 almost 10 thousand frames under every kind of circumstances but never experienced anything similar. Despite of that and better ISO performance of Mk II I stuck to K-1 and not gonna spend 500,- for upgrade. The tests also proved that K-1 is very powerful camera. ---------- Post added 02-04-18 at 05:29 ---------- I have seen this bands on K1 also. I was using CFL bulbs.

08-16-2018, 12:04 AM	#66
tungal Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery Posts: 398	Coming back to this old thread with a bit different question. On previous page I demonstrated the banding artefact of K-1 under certain LED-lights. But more vitable for me is the behaviour of camera regard to COLOUR-BANDING. Have anybody tested or knows, is K-1 MkII better at this point?

08-16-2018, 03:24 AM - 1 Like	#67
BigMackCam Digitiser of Film Join Date: Mar 2010 Location: North East of England Posts: 20,670	Originally posted by tungal Coming back to this old thread with a bit different question. On previous page I demonstrated the banding artefact of K-1 under certain LED-lights. But more vitable for me is the behaviour of camera regard to COLOUR-BANDING. Have anybody tested or knows, is K-1 MkII better at this point? Just to be clear, the banding artefact you demonstrated isn't unique to the K-1. It's a well-known product of pulsed lighting combined with rolling shutter, the effects of which will vary with the pulse frequency and shutter speed.

08-16-2018, 09:23 AM	#68
tungal Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery Posts: 398	Originally posted by BigMackCam Just to be clear, the banding artefact you demonstrated isn't unique to the K-1. It's a well-known product of pulsed lighting combined with rolling shutter, the effects of which will vary with the pulse frequency and shutter speed. Yes, of course (just MkII handles it better). E.g. it occurs when you don't synchronise shutter speed with flashlight (or vice versa :-))