Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-19-2016, 01:48 AM   #16
672
Pentaxian




Join Date: Dec 2010
Location: santa monica
Photos: Gallery
Posts: 417
the 645D is optimum iso of 200. 100 is a compromise. dulls the highlights a bit.

01-19-2016, 10:38 AM   #17
Pentaxian
cali92rs's Avatar

Join Date: May 2011
Location: Long Beach, CA
Posts: 3,346
QuoteOriginally posted by Ed Hurst Quote
Thanks Thomas - that's the data I was referring to. It certainly seems to suggest that 100 is closer to base ISO than 200, otherwise it would lead to a reduction rather than an increase in DR.[COLOR="Silver"]
That being the case, then I do not know why ISO 100 would be in the expanded ISO when all other camera manufacturers have their base ISO available without making it available in a menu.
I am not saying you are incorrect, and the DxO data suggests that ISO 100 is the real base ISO, I am suggesting that this was a misstep by Pentax.
01-19-2016, 11:06 PM   #18
Pentaxian




Join Date: May 2010
Location: Sydney
Posts: 499
cali92rs - I can only explain it with reference to the point above - that the firmware on the camera was closely based on that created for other bodies which may, perhaps, have had a base ISO of 200.

My experience is that overall DR and noise are optimised on the 645D by shooting at 100, not 200, but I cannot prove that scientifically so YMMV.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
645d, 645z, camera, dr, firmware, iso, medium format, native iso, scroll, thanks
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Iso 100 or 200 645d kuau Pentax Medium Format 4 02-13-2011 11:43 PM
Can't afford the 645D, what is the alternative for landscape. pcarfan Non-Pentax Cameras: Canon, Nikon, etc. 74 01-06-2011 03:25 AM
Why is the Iso speed lower in the K200 vs the K-M? Sitting Bull Troubleshooting and Beginner Help 7 01-19-2009 02:32 PM
Native ISO of the 14.6 MP CMOS Sensor (with !shocking! attempt to lighten mood!) solar1 Pentax DSLR Discussion 22 01-27-2008 06:15 PM
Native ISO in the K10D Michael Rothman Pentax DSLR Discussion 5 01-11-2007 05:44 AM



All times are GMT -7. The time now is 10:17 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top