Image Count
Posted 24/06/2018 - 10:51
Link
If you were shooting JPEG images then the number on a card is indicated as an average expectation. However, the actual space taken up depends on the amount of detail in each image. There will be much bigger files if a series of detailed landscapes is taken, rather than say a series of simpler shots with large, even expanses of blue sky.
Perhaps if you look at the typical file sizes of some images it will help with an explanation.
Perhaps if you look at the typical file sizes of some images it will help with an explanation.
Best regards, John
Posted 24/06/2018 - 11:20
Link
I'm not sure what your problem is, but most things that write to cards also store temporary files and must therefore keep some space in reserve. Even hard disks do that.
-
-
Half Man... Half Pentax ... Half Cucumber
Pentax K-1 + K-5 and some other stuff
Algi
Pentax K-1 + K-5 and some other stuff
Algi
Posted 24/06/2018 - 11:27
Link
johnriley wrote:
If you were shooting JPEG images then the number on a card is indicated as an average expectation.
If you were shooting JPEG images then the number on a card is indicated as an average expectation.
I should have said the camera was set for RAW DNG. I've checked the file size which ranges from 27.3MB to 35.5MB. I'd have thought they would all be the same. Thinking the senor should always capture the same amount of information, as it's not aware of the type of information it's receiving.
Barrie - Too Old To Die Young
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
Posted 24/06/2018 - 11:29
Link
Given each image will vary in size depending on the content, the number remaining has to be an estimate based on average image size and space remaining.
Posted 24/06/2018 - 11:34
Link
Algernon wrote:
I'm not sure what your problem is, but most things that write to cards also store temporary files and must therefore keep some space in reserve. Even hard disks do that.
-
I'm not sure what your problem is, but most things that write to cards also store temporary files and must therefore keep some space in reserve. Even hard disks do that.
-
it's not a problem. but your suggestion is the opposite of what seems to be happening. I'm getting more files on the disk than the space indicated by the camera.
Barrie - Too Old To Die Young
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
Posted 24/06/2018 - 11:37
Link
bforbes wrote:
I should have said the camera was set for RAW DNG. I've checked the file size which ranges from 27.3MB to 35.5MB. I'd have thought they would all be the same. Thinking the senor should always capture the same amount of information, as it's not aware of the type of information it's receiving.
johnriley wrote:
If you were shooting JPEG images then the number on a card is indicated as an average expectation.
If you were shooting JPEG images then the number on a card is indicated as an average expectation.
I should have said the camera was set for RAW DNG. I've checked the file size which ranges from 27.3MB to 35.5MB. I'd have thought they would all be the same. Thinking the senor should always capture the same amount of information, as it's not aware of the type of information it's receiving.
The file size can vary greatly depending on your scene. A large expanse of a single colour will result in a small file size. Mult coluors and multi toned images will be the opposite.
As John pointed out, the number of shots available that the camera displays is a conservative estimate and is not a reliable indicator of how many pictures you have taken (or indeed how many you can expect to take). It is a minimum estimate using an "average" file size.
Peter
My Flickr page
My Flickr page
Posted 24/06/2018 - 11:44
Link
richandfleur wrote:
Given each image will vary in size depending on the content, the number remaining has to be an estimate based on average image size and space remaining.
Given each image will vary in size depending on the content, the number remaining has to be an estimate based on average image size and space remaining.
Is it a "Given". Also the estimation would seem to be way off, having taken 699 when the camera estimates 411
Barrie - Too Old To Die Young
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
Posted 24/06/2018 - 11:58
Link
Sensible to pick a worst case scenario as a warning. Ie underestimate the available space left.
Posted 24/06/2018 - 11:58
Link
I can see the argument about file size varying in JPEG, when all the information gathered is processed and that thought not needed is discarded. But I can't see how it applies to a raw file, when I thought all the information is retained from sensors that don't know what the content is. Or are you saying the pixels talk to each other on the sensor eg. "your blue, I'm blue, I'll not bother recording"
Barrie - Too Old To Die Young
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
Posted 24/06/2018 - 12:04 - Helpful Comment
Link
At 16.5mb Sandisk say you should get 1,440 shots on a card. So at 33mb it should be 720 shots.
https://www.sandisk.com/about/legal/hd
--
https://www.sandisk.com/about/legal/hd
--
Half Man... Half Pentax ... Half Cucumber
Pentax K-1 + K-5 and some other stuff
Algi
Pentax K-1 + K-5 and some other stuff
Algi
Posted 24/06/2018 - 12:17
Link
bforbes wrote:
I can see the argument about file size varying in JPEG, when all the information gathered is processed and that thought not needed is discarded. But I can't see how it applies to a raw file, when I thought all the information is retained from sensors that don't know what the content is. Or are you saying the pixels talk to each other on the sensor eg. "your blue, I'm blue, I'll not bother recording"
I can see the argument about file size varying in JPEG, when all the information gathered is processed and that thought not needed is discarded. But I can't see how it applies to a raw file, when I thought all the information is retained from sensors that don't know what the content is. Or are you saying the pixels talk to each other on the sensor eg. "your blue, I'm blue, I'll not bother recording"
Go and test it. Makes sense to me that if the sensor only records 10 colours versus 100 the file size is smalller
Peter
My Flickr page
My Flickr page
Posted 24/06/2018 - 12:22 - Helpful Comment
Link
bforbes wrote:
I can see the argument about file size varying in JPEG, when all the information gathered is processed and that thought not needed is discarded. But I can't see how it applies to a raw file, when I thought all the information is retained from sensors that don't know what the content is. Or are you saying the pixels talk to each other on the sensor eg. "your blue, I'm blue, I'll not bother recording"
I can see the argument about file size varying in JPEG, when all the information gathered is processed and that thought not needed is discarded. But I can't see how it applies to a raw file, when I thought all the information is retained from sensors that don't know what the content is. Or are you saying the pixels talk to each other on the sensor eg. "your blue, I'm blue, I'll not bother recording"
RAW dng files do contain all of the info from the sensor, but in a lossless compressed format. Different scenes will compress to different degrees.
Posted 24/06/2018 - 12:36
Link
barkin wrote:
RAW dng files do contain all of the info from the sensor, but in a lossless compressed format. Different scenes will compress to different degrees.
RAW dng files do contain all of the info from the sensor, but in a lossless compressed format. Different scenes will compress to different degrees.
I can follow that logic and it makes sense of pschlute's test of DNG images.
28.7MB

30.9MB

Barrie - Too Old To Die Young
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
Posted 24/06/2018 - 12:45
Link
Algernon wrote:
At 16.5mb Sandisk say you should get 1,440 shots on a card. So at 33mb it should be 720 shots.
https://www.sandisk.com/about/legal/hd--
At 16.5mb Sandisk say you should get 1,440 shots on a card. So at 33mb it should be 720 shots.
https://www.sandisk.com/about/legal/hd--
So the answer is the camera is underestimating the numbers.
Thank you all.
Barrie - Too Old To Die Young
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
Add Comment
To leave a comment - Log in to Pentax User or create a new account.
6912 posts
16 years
Co. Durham UK
I was using a K-3ll with 2 x Sandisk Extreme Pro 32GB cards installed. The cards, when formatted in the camera, each showed a possible 598 shots available. In the event I only used one card and it still showed 187 shots available at the end of the day, so I'm thinking 411 shots taken.
When the images were loaded on to the computer it showed 699 images. I did delete a couple of images in the camera but not 288.
I'm sure there must be an explanation but I don't know what it is?
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/