Win a Pentax Limited Lens: Raffle Now Live!

rawr · 10-22-2017, 03:26 PM

I noticed the other day on DPReview that Bill Claff was asking KP shooters for help in providing image samples for his sensor testing work:

Help Sought to Perform KP Sensor Analysis at PhotonsToPhotos: Pentax SLR Talk Forum: Digital Photography Review

It would be great if any KP users could help him out. His email is bclaff@post.harvard.edu and his site & charts are at:

Photons to Photos

His work is very useful, especially when sites like DxOMark sometimes ignore Pentax, or simply take forever to test Pentax.

It will be particularly interesting to see how the KP sensor performs against other cameras on charts like this one:

Photographic Dynamic Range versus ISO Setting

**monochrome** · 10-22-2017, 07:52 PM

I’m in (offered anyway).

**Mikesul** · 11-24-2017, 03:12 PM

He hasn't added KP to his list so maybe he needs more samples. He already had the Sony A7RIII up and that isn't even available in the US yet.

MJKoski · 11-25-2017, 04:29 AM

So in summary, what do I need to do to be able to help him? Take shots of what and how many?

rawr · 11-25-2017, 05:01 AM

Originally posted by MJKoski

what do I need to do to be able to help him? Take shots of what and how many?

All I know is what he posted in the DPR article:

Data gathering involves taking a number of specific raw images; tedious but not hard for most.

and his web site:

Data is measured from raw files taken to my specifications and contributed by people from around the world.

To find out his 'specifications', you need to email him.

He really needs to post a methodology page on his web site to openly display how he does his work and calculations.

MJKoski · 11-25-2017, 06:41 AM

All right, let's find out.

10-22-2017, 03:26 PM	#1
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	KP users - do some tests, help Bill Claff I noticed the other day on DPReview that Bill Claff was asking KP shooters for help in providing image samples for his sensor testing work: Help Sought to Perform KP Sensor Analysis at PhotonsToPhotos: Pentax SLR Talk Forum: Digital Photography Review It would be great if any KP users could help him out. His email is bclaff@post.harvard.edu and his site & charts are at: Photons to Photos His work is very useful, especially when sites like DxOMark sometimes ignore Pentax, or simply take forever to test Pentax. It will be particularly interesting to see how the KP sensor performs against other cameras on charts like this one: Photographic Dynamic Range versus ISO Setting

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
comprar una KP o pasarme al formato compreto (Buy a KP or switch to the full format)?	mariovidal	Pentax KP	5	06-29-2018 05:45 AM
Why Pentax KP? Para que la Pentax KP?	ZeaFoto	Pentax KP	16	06-14-2018 08:53 AM
Travel Buffalo Bill Ctr - Pt 5 Buffalo Bill	SpecialK	Post Your Photos!	1	07-20-2011 01:06 PM
some wide angle tests	Gooshin	Pentax SLR Lens Discussion	12	07-05-2008 03:57 PM
Some K20D Vs K10D ISO noise tests (100 to 6400)	RiceHigh	Pentax DSLR Discussion	15	02-25-2008 04:00 PM

10-22-2017, 07:52 PM	#2
monochrome Loyal Site Supporter Join Date: Mar 2008 Location: Working From Home Photos: Gallery \| Albums Posts: 26,276	I’m in (offered anyway).

11-24-2017, 03:12 PM	#3
Mikesul Loyal Site Supporter Join Date: Sep 2009 Location: Phoenix, AZ Posts: 7,594	He hasn't added KP to his list so maybe he needs more samples. He already had the Sony A7RIII up and that isn't even available in the US yet.

11-25-2017, 04:29 AM	#4
MJKoski Veteran Member Join Date: Aug 2016 Posts: 1,784	So in summary, what do I need to do to be able to help him? Take shots of what and how many?

11-25-2017, 05:01 AM	#5
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913 Original Poster	Originally posted by MJKoski what do I need to do to be able to help him? Take shots of what and how many? All I know is what he posted in the DPR article: Data gathering involves taking a number of specific raw images; tedious but not hard for most. and his web site: Data is measured from raw files taken to my specifications and contributed by people from around the world. To find out his 'specifications', you need to email him. He really needs to post a methodology page on his web site to openly display how he does his work and calculations.

11-25-2017, 06:41 AM	#6
MJKoski Veteran Member Join Date: Aug 2016 Posts: 1,784	All right, let's find out.

KP users - do some tests, help Bill Claff

Win a Pentax Limited Lens: Raffle Now Live!