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**Kerrowdown** · 03-30-2016, 01:53 PM

Does anymore know or been clever enough to work out what the DNG file size for an image on the K1 will be at FF?

As I've just ordered up a couple of SanDisk 32GB Extreme Pro 95MB/Sec SDHC Cards ready for K1 delivery.

enoeske · 03-30-2016, 02:10 PM

Originally posted by Kerrowdown

Does anymore know or been clever enough to work out what the DNG file size for an image on the K1 will be at FF?

As I've just ordered up a couple of SanDisk 32GB Extreme Pro 95MB/Sec SDHC Cards ready for K1 delivery.

36MP with 14 bits means a maximum of around 60MB per DNG but a typical file will be smaller with lossless compression.

**jatrax** · 03-30-2016, 02:14 PM

My first digital camera was a Sony Mavica. 1.44mb floppy disks. I think you got 12 to 15 shots per disk.

I have 32gb Extreme Pro cards in the k-3 so I think that is what I'm going to go with on the K-1 as well. I have really tried hard to cut back on the number of shots I take and with the K-1 I think I will be even more deliberate.

**Kerrowdown** · 03-30-2016, 02:15 PM

Originally posted by enoeske

36MP with 14 bits means a maximum of around 60MB per DNG

Thanks for that, I was guessing it to be around that... so I should still get 300 ish per card, provided I've done the maths right, happy days.

Adam · 03-30-2016, 03:19 PM

Originally posted by Kerrowdown

Does anymore know or been clever enough to work out what the DNG file size for an image on the K1 will be at FF?

As I've just ordered up a couple of SanDisk 32GB Extreme Pro 95MB/Sec SDHC Cards ready for K1 delivery.

Most of mine in the ISO 100-800 range are around 45 Mb

**Kerrowdown** · 03-30-2016, 03:22 PM

Originally posted by Adam

Most of mine in the ISO 100-800 range are around 45 Mb

Cool, thanks Adam, cards are already on their way, just waiting on the K1 now.

GeneV · 04-01-2016, 06:28 AM

Raw files from my FF 36mp Sony A7r run around 35mb regardless of ISO. Perhaps the ARW format compresses more.

**clackers** · 04-01-2016, 06:41 AM

Originally posted by GeneV

Raw files from my FF 36mp Sony A7r run around 35mb regardless of ISO. Perhaps the ARW format compresses more.

Lossy compression.

**Kerrowdown** · 04-01-2016, 12:52 PM

Here's some extra info I've since obtained from the pdf of the K1 operating manual, Appendix Page 119...

Approximate Image Storage Capacity by Size (When using an 8 GB memory card) Raw 101.

HopelessTogger · 04-01-2016, 01:32 PM

Originally posted by GeneV

Raw files from my FF 36mp Sony A7r run around 35mb regardless of ISO. Perhaps the ARW format compresses more.

I processed an A7r file to TIFF last week. 209 megabytes!

GeneV · 04-01-2016, 02:27 PM

Originally posted by clackers

Lossy compression.

I forgot about that. The latest firmware for the newer models allows the option of uncompressed raw. I don't see that the firmware update for the A7R lists that as a change.

HopelessTogger · 04-01-2016, 03:03 PM

Originally posted by GeneV

I forgot about that. The latest firmware for the newer models allows the option of uncompressed raw. I don't see that the firmware update for the A7R lists that as a change.

No uncompressed for A7r. Still lousyRAW.

**clackers** · 04-01-2016, 04:58 PM

Originally posted by GeneV

I forgot about that. The latest firmware for the newer models allows the option of uncompressed raw. I don't see that the firmware update for the A7R lists that as a change.

Terrible performance hit if you did, Gene:

Youtu.be

**jatrax** · 04-01-2016, 05:54 PM

Originally posted by Kerrowdown

Approximate Image Storage Capacity by Size (When using an 8 GB memory card) Raw 101.

Hmm, my K-3II reports 598 RAWs on a 32gb card. So 400 RAWs on that card with the k-1? Not too bad, I can live with that.

GeneV · 04-02-2016, 08:00 AM

Originally posted by HopelessTogger

No uncompressed for A7r. Still lousyRAW.

Yeah, after this thread I upgraded to firmware 3.1 from 1.01, but no option for uncompressed raw. The notes do say "improved image quality" as a claimed benefit from the upgrade. I don't know what that means.

From what I have read, it is mostly highlight noise that gets dropped in the lossy raw files, but there may be some minute posterization effects at the borders in the shadows. Since we have no other option, we will not be able to see the difference.

03-30-2016, 01:53 PM	#1
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,867	Image File Size Does anymore know or been clever enough to work out what the DNG file size for an image on the K1 will be at FF? As I've just ordered up a couple of SanDisk 32GB Extreme Pro 95MB/Sec SDHC Cards ready for K1 delivery.

03-30-2016, 03:19 PM	#5
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,609	Originally posted by Kerrowdown Does anymore know or been clever enough to work out what the DNG file size for an image on the K1 will be at FF? As I've just ordered up a couple of SanDisk 32GB Extreme Pro 95MB/Sec SDHC Cards ready for K1 delivery. Most of mine in the ISO 100-800 range are around 45 Mb Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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03-30-2016, 02:10 PM	#2
enoeske Veteran Member Join Date: Jul 2009 Location: Surprise, Az Photos: Gallery Posts: 2,136	Originally posted by Kerrowdown Does anymore know or been clever enough to work out what the DNG file size for an image on the K1 will be at FF? As I've just ordered up a couple of SanDisk 32GB Extreme Pro 95MB/Sec SDHC Cards ready for K1 delivery. 36MP with 14 bits means a maximum of around 60MB per DNG but a typical file will be smaller with lossless compression.

03-30-2016, 02:14 PM	#3
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,992	My first digital camera was a Sony Mavica. 1.44mb floppy disks. I think you got 12 to 15 shots per disk. I have 32gb Extreme Pro cards in the k-3 so I think that is what I'm going to go with on the K-1 as well. I have really tried hard to cut back on the number of shots I take and with the K-1 I think I will be even more deliberate.

03-30-2016, 02:15 PM	#4
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,867 Original Poster	Originally posted by enoeske 36MP with 14 bits means a maximum of around 60MB per DNG Thanks for that, I was guessing it to be around that... so I should still get 300 ish per card, provided I've done the maths right, happy days.

03-30-2016, 03:22 PM	#6
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,867 Original Poster	Originally posted by Adam Most of mine in the ISO 100-800 range are around 45 Mb Cool, thanks Adam, cards are already on their way, just waiting on the K1 now.

04-01-2016, 06:28 AM	#7
GeneV Veteran Member Join Date: Oct 2008 Location: Albuquerque NM Photos: Albums Posts: 9,830	Raw files from my FF 36mp Sony A7r run around 35mb regardless of ISO. Perhaps the ARW format compresses more.

04-01-2016, 06:41 AM	#8
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by GeneV Raw files from my FF 36mp Sony A7r run around 35mb regardless of ISO. Perhaps the ARW format compresses more. Lossy compression.

04-01-2016, 12:52 PM	#9
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,867 Original Poster	Here's some extra info I've since obtained from the pdf of the K1 operating manual, Appendix Page 119... Approximate Image Storage Capacity by Size (When using an 8 GB memory card) Raw 101.

04-01-2016, 01:32 PM	#10
HopelessTogger Veteran Member Join Date: Jan 2016 Location: Roi-et, Thailand Posts: 773	Originally posted by GeneV Raw files from my FF 36mp Sony A7r run around 35mb regardless of ISO. Perhaps the ARW format compresses more. I processed an A7r file to TIFF last week. 209 megabytes!

04-01-2016, 02:27 PM	#11
GeneV Veteran Member Join Date: Oct 2008 Location: Albuquerque NM Photos: Albums Posts: 9,830	Originally posted by clackers Lossy compression. I forgot about that. The latest firmware for the newer models allows the option of uncompressed raw. I don't see that the firmware update for the A7R lists that as a change.

04-01-2016, 03:03 PM	#12
HopelessTogger Veteran Member Join Date: Jan 2016 Location: Roi-et, Thailand Posts: 773	Originally posted by GeneV I forgot about that. The latest firmware for the newer models allows the option of uncompressed raw. I don't see that the firmware update for the A7R lists that as a change. No uncompressed for A7r. Still lousyRAW.

04-01-2016, 05:54 PM	#14
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,992	Originally posted by Kerrowdown Approximate Image Storage Capacity by Size (When using an 8 GB memory card) Raw 101. Hmm, my K-3II reports 598 RAWs on a 32gb card. So 400 RAWs on that card with the k-1? Not too bad, I can live with that.

04-02-2016, 08:00 AM	#15
GeneV Veteran Member Join Date: Oct 2008 Location: Albuquerque NM Photos: Albums Posts: 9,830	Originally posted by HopelessTogger No uncompressed for A7r. Still lousyRAW. Yeah, after this thread I upgraded to firmware 3.1 from 1.01, but no option for uncompressed raw. The notes do say "improved image quality" as a claimed benefit from the upgrade. I don't know what that means. From what I have read, it is mostly highlight noise that gets dropped in the lossy raw files, but there may be some minute posterization effects at the borders in the shadows. Since we have no other option, we will not be able to see the difference.

Image File Size

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