All Forum Comments
Comment by Tyr posted on straining the "motor" on the k10d at 12/07/2007 - 12:23
Quote:
2. Some time is spent on compression, but less time on writing to the card. I don't know which takes longer; The internal compression of data or the writing of an additional 6M to the card. It is possible that compressing and writing the PEF is faster than writing the DNG itself.
I haven't done any tests, it would be interesting to hear how many PEFs can be taken compared to DNG before the buffer slows things down.
Compression must be done before the buffer otherwise continuous shooting in JPEG would have the same limitations as RAW.Quote:
I've been using DNG as i was under the assumption that there was little or no compression used, whereas PEF has 'some' compression. I thought compression was to be avoided where possible for several reasons.
1. image degradation, even lossless compression would cause some loss or change of data captured.
2. performance issues, saving the raw data must be faster than compressing, THEN saving the data.
1. Lossless compression is just that. There should be no changes. I've been using DNG as i was under the assumption that there was little or no compression used, whereas PEF has 'some' compression. I thought compression was to be avoided where possible for several reasons.
1. image degradation, even lossless compression would cause some loss or change of data captured.
2. performance issues, saving the raw data must be faster than compressing, THEN saving the data.
2. Some time is spent on compression, but less time on writing to the card. I don't know which takes longer; The internal compression of data or the writing of an additional 6M to the card. It is possible that compressing and writing the PEF is faster than writing the DNG itself.
I haven't done any tests, it would be interesting to hear how many PEFs can be taken compared to DNG before the buffer slows things down.
Comment by Tyr posted on The RAW vs JPEG Debate at 12/07/2007 - 16:30
Quote:
I have a 2gb card in my k10d, on startup with a formated card it tells me I can take approx:
DNG= 119.
PEF=120.
Not a great deal of difference there but it is an assumption on the camera's part.
however, there is a ~ 6Mb saving for PEF files per image taken. For two identical shots the DNG is 16.2 Mb and the PEF is 10.2 Mb
I've been using DNG as i was under the assumption that there was little or no compression used, whereas PEF has 'some' compression. I thought compression was to be avoided where possible for several reasons.
1. image degradation, even lossless compression would cause some loss or change of data captured.
2. performance issues, saving the raw data must be faster than compressing, THEN saving the data.
I'll do some more research on the PEF format.
The counter does not take into account compression of the PEF files. You can get 180 PEF files on a 2GB card.I have a 2gb card in my k10d, on startup with a formated card it tells me I can take approx:
DNG= 119.
PEF=120.
Not a great deal of difference there but it is an assumption on the camera's part.
however, there is a ~ 6Mb saving for PEF files per image taken. For two identical shots the DNG is 16.2 Mb and the PEF is 10.2 Mb
I've been using DNG as i was under the assumption that there was little or no compression used, whereas PEF has 'some' compression. I thought compression was to be avoided where possible for several reasons.
1. image degradation, even lossless compression would cause some loss or change of data captured.
2. performance issues, saving the raw data must be faster than compressing, THEN saving the data.
I'll do some more research on the PEF format.
Comment by Tyr posted on The RAW vs JPEG Debate at 12/07/2007 - 16:15
Quote:
I use Sandisk Extreme III and Lexar Pro SD cards (both 133x) and the K10D absolutely flies. Almost immediate replay of images (Under 1 second to view.. histogram shows in another second or so. Scrolling through images is faster than I can see...)
Matt
Aye, I have no issues at all viewing RAW and I can shoot off as many shots as I like within a reasonable time frame. Instant review, histogram check press shutter to go back and can immediately shoot again. If I know the image is fine or don't have time to check I can shoot straight away without moving the camera.Quote:
Also sometimes it can take an eternity to view the image on the LCD screen while it loads as it is a big file. NOt good if you are in a rush and want to check the histogram quick etc..
You must have a really "pants" card Pete Also sometimes it can take an eternity to view the image on the LCD screen while it loads as it is a big file. NOt good if you are in a rush and want to check the histogram quick etc..
I use Sandisk Extreme III and Lexar Pro SD cards (both 133x) and the K10D absolutely flies. Almost immediate replay of images (Under 1 second to view.. histogram shows in another second or so. Scrolling through images is faster than I can see...)
Matt
Comment by Tyr posted on The RAW vs JPEG Debate at 12/07/2007 - 14:28
Quote:
Another reason for using RAW is that the workflow, using Silkypix, is so fast and efficient, whilst at the same time producing superb quality.
It (the paid version) is designed for fast batch processing. I haven't used any of the high-end Adobe products, but I find it difficult to believe that they do the job better than Silkypix.
Indeed, I believe PeteKD uses Silkypix for processing JPEGs!
G
Same work flow speed with Lightroom with no difficulties at all. I prefer the results from Lightroom (good thing too as I bought it).Another reason for using RAW is that the workflow, using Silkypix, is so fast and efficient, whilst at the same time producing superb quality.
It (the paid version) is designed for fast batch processing. I haven't used any of the high-end Adobe products, but I find it difficult to believe that they do the job better than Silkypix.
Indeed, I believe PeteKD uses Silkypix for processing JPEGs!
G
At the DNG comment, shoot PEF on the K10 as stated an extra 60% photos is not something that should be ignored. Same quality as DNG, although if they went for DNG support I don't see why they didn't just use compressed DNG to start with.
Comment by Tyr posted on The RAW vs JPEG Debate at 12/07/2007 - 11:00
I was going to say, what debate? I convert to JPEG for printing snapshots (they only accept JPEG or TIFF at most labs) and Tiff for anything large.
My K10D is always set to RAW, I'd never consider changing that.
My K10D is always set to RAW, I'd never consider changing that.
Comment by Tyr posted on The RAW vs JPEG Debate at 12/07/2007 - 10:21
Quote:
Sorry to burst the bubble...
Both Cokin P and Hitech filters have a red/magenta "tinge" to them. It's most noticeable when you stack two of them together.
The Cokin Z-Pro are better, but the tinge is there still (not a great deal though).
AFAIK, the Lees are the only ones that don't
It's not difficult to correct for in digital, and sometimes (I might add) the tinge is quite welcome - adds a slight autumnal feel
Matt
Thanks, that means I'll get the Lee when I can. Shame about the tint as the Cokin ND set comes with a case. But then when you include everything in the package the glass (or other material) must be cheaper.Sorry to burst the bubble...
Both Cokin P and Hitech filters have a red/magenta "tinge" to them. It's most noticeable when you stack two of them together.
The Cokin Z-Pro are better, but the tinge is there still (not a great deal though).
AFAIK, the Lees are the only ones that don't
It's not difficult to correct for in digital, and sometimes (I might add) the tinge is quite welcome - adds a slight autumnal feel
Matt
I've seen some leki trekking poles with removable handle and a monopod screw underneath. A bit of a pain to use because you have to unscrew the top each time you want to set up. Wish they have a quick release mechanism.
Comment by Tyr posted on Cheap monopod Needed at 12/07/2007 - 15:49
Not nice in brown/gold... Nothing really special about it...
Comment by Tyr posted on Who's buying it? at 11/07/2007 - 17:39
Chocolate buttons?
Comment by Tyr posted on Auto Chinon F/1.4 50mm - worth anything? at 12/07/2007 - 11:39
The shutter life is rated at 10000 actuations which would take about an hour of continuous shooting at 3fps. I'm not sure why anyone would need to put a camera through this kind of run
10 Megapixel
Paper Density
A1 100dpi
A2 150dpi
A3 220dpi
A4 300dpi
A5 500dpi
6 Megapixel
Paper Density
A1 84dpi
A2 120dpi
A3 170dpi
A4 240dpi
A5 340dpi
300dpi is what you want to aim for in close examination situations like a book so 10MP would be much better.