645D write speed

ACH DIGITAL · 12-06-2011, 12:24 PM

Thanks Yamanobori. You're right.. I'll see to that..

phonoline · 12-11-2011, 12:20 PM

I use a 16 and 8GB Sandisk Extreme card with 30 MB/s. At first I was pretty dissappointed and pi**ed off by the writing speed of the 645D but since I have started shooting RAW only (Pentax PEF, not DNG), writing speed seems much faster to me and not annoying at all. I hardly use RAW+JPG or JPG only as the quality of the JPG is plain unusable.

ACH DIGITAL · 12-11-2011, 01:18 PM

Is it faster or better with PEF than RAW?

-Linus- · 12-11-2011, 02:16 PM

Pentax PEF is RAW, DNG also, but not as compact therefor needs longer to write.

-Linus-

**jackinkc** · 12-11-2011, 02:30 PM

Originally posted by ACH DIGITAL

Is it faster or better with PEF than RAW?

I just fired up my camera and shot in both .DNG and Pentax Raw. I counted seconds before the image came up. Both formats took about the same amount of time. I realize this is a non-controlled test, but any difference seems inconsequential.

phonoline · 12-11-2011, 02:30 PM

PEF gets compressed but there is no loss in quality. Here's a thread I found thru google.

Aboudd · 12-11-2011, 06:25 PM

Turn off everything. No high ISO noise reduction, no HDR, pretty much no options whatsoever, shoot RAW and you can knock off about half of the processing time. My 645 D was taking 6 or 7 seconds at one point, now it is 3 or so. Still not swift, but acceptable given most shooting styles associated with this camera.

marktucker · 07-18-2012, 05:40 AM

I am attempting to set this 645D up for a Lifestyle shoot. I need it to run as fast as possible. I am curious if anyone can provide info to get the very fastest write times, to the SD cards, and also to get the camera to report back, as quickly as possible, with the LCD Preview. While I love the camera, I too have found the Processing Engine to be very slow; makes it hard to shoot people, quickly, with multiple frames. It seems vastly underpowered to me.

* I am running latest firmware, and I am running the Sandisk Extreme Pro 95 m/s SD cards.

* I am running only Slot 1. Slot 2 is turned off in the camera.

* Shooting RAW/DNG to card.

* Do you think the JPG settings, for size and compression, have anything to do with the actual creation of the JPG Preview that you see on the LCD? In other words, if you were shooting RAW to the card, but you wanted a fast Preview, would it help to set the JPG settings to the smallest JPG and the most compression? I would be willing to see a lesser quality LCD image, for review, if it came up FASTER.

* Any other suggestions that users have found?

Thank you very much.

slackercruster · 07-30-2012, 05:55 AM

Originally posted by jackinkc

I carry two 32 GB cards but only shoot to #1. #2 card is only for the unlikely event that I run out of room. I only shoot in .DNG RAW format.

How does DNG RAW differ from Pentax's RAW?

Yamanobori · 07-30-2012, 08:43 AM

DNGs take up more space. Thats about it.

Anvh · 07-30-2012, 10:17 AM

Originally posted by Yamanobori

DNGs take up more space. Thats about it.

You saying that from experience with the 645D?
DNG and PEF have been the same size since the Kx was introduced and since the 645D and K5 share the same hardware it would be very strange if tehre was indeed a differnce.

Yamanobori · 07-30-2012, 11:35 AM

Well, the file size of my 645D PEFs are different--there seems to be some kind of file compression going on. I do not believe DNG supports file compression of any kind.

What is your experience with the 645D with RAW files?

RonHendriks1966 · 07-30-2012, 11:43 AM

Originally posted by marktucker

I am attempting to set this 645D up for a Lifestyle shoot. I need it to run as fast as possible. I am curious if anyone can provide info to get the very fastest write times, to the SD cards, and also to get the camera to report back, as quickly as possible, with the LCD Preview. While I love the camera, I too have found the Processing Engine to be very slow; makes it hard to shoot people, quickly, with multiple frames. It seems vastly underpowered to me.

* I am running latest firmware, and I am running the Sandisk Extreme Pro 95 m/s SD cards.

* I am running only Slot 1. Slot 2 is turned off in the camera.

* Shooting RAW/DNG to card.

* Do you think the JPG settings, for size and compression, have anything to do with the actual creation of the JPG Preview that you see on the LCD? In other words, if you were shooting RAW to the card, but you wanted a fast Preview, would it help to set the JPG settings to the smallest JPG and the most compression? I would be willing to see a lesser quality LCD image, for review, if it came up FASTER.

* Any other suggestions that users have found?

Thank you very much.

Well the preview jpg is a different file in the RAW-format, so setting different settings for jpg are not related to that. You camera will be faster when you turn off the preview and only use it when you need it to check things. You can use the internal buffer and keep shooting, but then you have to wait at some point to check things. On the other hand learning to trust your camera working with choosen settings is also a good way to speed up things.

Turning off things like lenscorrections and noise reduction makes the camera faster. It never will be a fast camera, unless you compare it to the 645N where you have to wait for filmdevelopement.

Anvh · 08-01-2012, 03:39 AM

Originally posted by Yamanobori

Well, the file size of my 645D PEFs are different--there seems to be some kind of file compression going on. I do not believe DNG supports file compression of any kind.

What is your experience with the 645D with RAW files?

It does compress the DNG with the Kx, Kr, K7, K5, Q, K30 and the K-01 so like i said would be strange th 645D doesn't

Played with the 645D for a hour but nothing serious so no experience, thats why i'am asking.

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12-06-2011, 12:24 PM	#16
ACH DIGITAL New Member Join Date: Dec 2011 Posts: 11	Thanks Yamanobori. You're right.. I'll see to that..

12-11-2011, 12:20 PM	#17
phonoline Senior Member Join Date: Jun 2010 Location: Hamburg Posts: 267	I use a 16 and 8GB Sandisk Extreme card with 30 MB/s. At first I was pretty dissappointed and pi**ed off by the writing speed of the 645D but since I have started shooting RAW only (Pentax PEF, not DNG), writing speed seems much faster to me and not annoying at all. I hardly use RAW+JPG or JPG only as the quality of the JPG is plain unusable.

12-11-2011, 01:18 PM	#18
ACH DIGITAL New Member Join Date: Dec 2011 Posts: 11	Is it faster or better with PEF than RAW?

12-11-2011, 02:16 PM	#19
-Linus- Senior Member Join Date: Dec 2009 Location: Münsterland Posts: 139	Pentax PEF is RAW, DNG also, but not as compact therefor needs longer to write. -Linus-

12-11-2011, 02:30 PM	#20
jackinkc Site Supporter Join Date: Dec 2011 Location: Kansas City, Missouri Posts: 118 Original Poster	Originally posted by ACH DIGITAL Is it faster or better with PEF than RAW? I just fired up my camera and shot in both .DNG and Pentax Raw. I counted seconds before the image came up. Both formats took about the same amount of time. I realize this is a non-controlled test, but any difference seems inconsequential.

12-11-2011, 02:30 PM	#21
phonoline Senior Member Join Date: Jun 2010 Location: Hamburg Posts: 267	PEF gets compressed but there is no loss in quality. Here's a thread I found thru google.

12-11-2011, 06:25 PM	#22
Aboudd Senior Member Join Date: Jun 2011 Location: Arlington, VA Posts: 187	Turn off everything. No high ISO noise reduction, no HDR, pretty much no options whatsoever, shoot RAW and you can knock off about half of the processing time. My 645 D was taking 6 or 7 seconds at one point, now it is 3 or so. Still not swift, but acceptable given most shooting styles associated with this camera.

07-18-2012, 05:40 AM	#23
marktucker New Member Join Date: Sep 2011 Posts: 17	I am attempting to set this 645D up for a Lifestyle shoot. I need it to run as fast as possible. I am curious if anyone can provide info to get the very fastest write times, to the SD cards, and also to get the camera to report back, as quickly as possible, with the LCD Preview. While I love the camera, I too have found the Processing Engine to be very slow; makes it hard to shoot people, quickly, with multiple frames. It seems vastly underpowered to me. * I am running latest firmware, and I am running the Sandisk Extreme Pro 95 m/s SD cards. * I am running only Slot 1. Slot 2 is turned off in the camera. * Shooting RAW/DNG to card. * Do you think the JPG settings, for size and compression, have anything to do with the actual creation of the JPG Preview that you see on the LCD? In other words, if you were shooting RAW to the card, but you wanted a fast Preview, would it help to set the JPG settings to the smallest JPG and the most compression? I would be willing to see a lesser quality LCD image, for review, if it came up FASTER. * Any other suggestions that users have found? Thank you very much.

07-30-2012, 05:55 AM	#24
slackercruster Veteran Member Join Date: Jan 2012 Location: NE, USA Posts: 1,302	Originally posted by jackinkc I carry two 32 GB cards but only shoot to #1. #2 card is only for the unlikely event that I run out of room. I only shoot in .DNG RAW format. How does DNG RAW differ from Pentax's RAW?

07-30-2012, 08:43 AM	#25
Yamanobori Veteran Member Join Date: Feb 2011 Photos: Gallery Posts: 573	DNGs take up more space. Thats about it.

07-30-2012, 10:17 AM	#26
Anvh Veteran Member Join Date: Sep 2011 Posts: 4,616	Originally posted by Yamanobori DNGs take up more space. Thats about it. You saying that from experience with the 645D? DNG and PEF have been the same size since the Kx was introduced and since the 645D and K5 share the same hardware it would be very strange if tehre was indeed a differnce.

07-30-2012, 11:35 AM	#27
Yamanobori Veteran Member Join Date: Feb 2011 Photos: Gallery Posts: 573	Well, the file size of my 645D PEFs are different--there seems to be some kind of file compression going on. I do not believe DNG supports file compression of any kind. What is your experience with the 645D with RAW files?

07-30-2012, 11:43 AM	#28
RonHendriks1966 Banned Join Date: Jan 2009 Photos: Gallery Posts: 9,675	Originally posted by marktucker I am attempting to set this 645D up for a Lifestyle shoot. I need it to run as fast as possible. I am curious if anyone can provide info to get the very fastest write times, to the SD cards, and also to get the camera to report back, as quickly as possible, with the LCD Preview. While I love the camera, I too have found the Processing Engine to be very slow; makes it hard to shoot people, quickly, with multiple frames. It seems vastly underpowered to me. * I am running latest firmware, and I am running the Sandisk Extreme Pro 95 m/s SD cards. * I am running only Slot 1. Slot 2 is turned off in the camera. * Shooting RAW/DNG to card. * Do you think the JPG settings, for size and compression, have anything to do with the actual creation of the JPG Preview that you see on the LCD? In other words, if you were shooting RAW to the card, but you wanted a fast Preview, would it help to set the JPG settings to the smallest JPG and the most compression? I would be willing to see a lesser quality LCD image, for review, if it came up FASTER. * Any other suggestions that users have found? Thank you very much. Well the preview jpg is a different file in the RAW-format, so setting different settings for jpg are not related to that. You camera will be faster when you turn off the preview and only use it when you need it to check things. You can use the internal buffer and keep shooting, but then you have to wait at some point to check things. On the other hand learning to trust your camera working with choosen settings is also a good way to speed up things. Turning off things like lenscorrections and noise reduction makes the camera faster. It never will be a fast camera, unless you compare it to the 645N where you have to wait for filmdevelopement.

08-01-2012, 03:39 AM	#29
Anvh Veteran Member Join Date: Sep 2011 Posts: 4,616	Originally posted by Yamanobori Well, the file size of my 645D PEFs are different--there seems to be some kind of file compression going on. I do not believe DNG supports file compression of any kind. What is your experience with the 645D with RAW files? It does compress the DNG with the Kx, Kr, K7, K5, Q, K30 and the K-01 so like i said would be strange th 645D doesn't Played with the 645D for a hour but nothing serious so no experience, thats why i'am asking.