Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-24-2015, 08:05 AM   #1
New Member




Join Date: Dec 2014
Posts: 8
645Z raw file size

How much do you average for file sizes for the raw (DNG) images taken with your 645Z? From what I can see, I go up to 50 megabytes or so per image, no more. The Nikon 810 I also own goes up to 70 megabytes.

The Hasselblad h5d-50c based on the same Sony sensor used in the 645Z claims of file sizes of 65 megabytes for their raw format. This has a 16bit readout (the 645Z is a 14bit like the Nikon).

Does Pentax use some sort of raw cooking/compression for their files or the Nikon ones have a lot of gibberish data to have such heavy files come out as raw?

05-24-2015, 08:12 AM   #2
Senior Member




Join Date: Mar 2015
Posts: 160
Of course your question is image dependent and it is important to compare the same image between camera for this exercise. I have had my RAW files up to 92mb, but many are less too.

You asked about average, but I have never paid that much attention to my file sizes to determine an accurate average. Sorry.
05-24-2015, 11:14 AM   #3
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,694
QuoteOriginally posted by MKD Quote
How much do you average for file sizes for the raw (DNG) images taken with your 645Z? From what I can see, I go up to 50 megabytes or so per image, no more. The Nikon 810 I also own goes up to 70 megabytes.

The Hasselblad h5d-50c based on the same Sony sensor used in the 645Z claims of file sizes of 65 megabytes for their raw format. This has a 16bit readout (the 645Z is a 14bit like the Nikon).

Does Pentax use some sort of raw cooking/compression for their files or the Nikon ones have a lot of gibberish data to have such heavy files come out as raw?
There's a table with typical RAW file sizes here:
Pentax 645Z Review - Performance and Burst Mode | PentaxForums.com Reviews

Essentially, the higher the ISO the larger the file size, since compression isn't as effective when there's noise.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

05-24-2015, 11:32 AM   #4
Veteran Member
Kolor-Pikker's Avatar

Join Date: Dec 2014
Posts: 342
Just looked over some images I've shot over the days and file sizes range over 60-80MB, but I didn't notice any real correlation between shot settings and file sizes.

Exposure seems to have a big part in it, as the 60MB files were dark, while the 80MB files were very brightly exposed.

05-31-2015, 11:28 PM   #5
Junior Member




Join Date: Apr 2015
Posts: 47
I can certainly feel the difference between my A7R files and 645Z files when it comes to computer speed. The 645Z files make my laptop cough a little! 70MB is about right as an average, as stated above. Busy scenes with lots of shadow detail cause them to rise higher though.
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, files, medium format, megabytes, nikon, sizes
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax Q Raw file size huge LightBug Pentax Compact Cameras 6 09-24-2014 11:45 PM
File Size for Raw john mood Pentax DSLR Discussion 23 01-04-2012 12:46 PM
K7 RAW file size candgpics Pentax DSLR Discussion 9 04-07-2010 09:43 PM
Actual RAW file size and recordable image number Matjazz Pentax DSLR Discussion 12 04-01-2009 04:33 PM
Raw/DNG File Size Ralph Wagner Pentax DSLR Discussion 3 06-04-2008 05:55 PM



All times are GMT -7. The time now is 02:53 AM. | 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