All Forum Comments
Comment by George Lazarette posted on Conway Castle at sunrise at 17/02/2008 - 22:38
Dan Bridges.
Dan Bridge
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Comment by George Lazarette posted on Using CR-V3 and RCR-V3 batteries in Pentax DSLRs at 22/02/2008 - 09:31
http://www.7dayshop.com/catalog/product_info.php?cPath=777_3&products_id=102...
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Comment by George Lazarette posted on Using CR-V3 and RCR-V3 batteries in Pentax DSLRs at 17/02/2008 - 22:42
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Comment by George Lazarette posted on Anyone having trouble with the raw button K10D? at 18/02/2008 - 08:39
Thanks guys.
I can see that the DA*30 may be a more direct replacement.
On the e-bay links, thanks. I had only looked at UK based sellers, maybe I am over cautious but it's a lot of money for me, also I've read that you risk having to pay import duties if you buy from abroad.
I suppose I was looking to pay at most £150 all in. I can get it from a local camera shop where I work for £235 so if I had £200 or so that's what's I'd do.
Maybe my expectations (hopes?) on what I could get one for secondhand are way too low?
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Comment by George Lazarette posted on FA 35's likely to be sold for new DA35 Macros? at 22/02/2008 - 13:45
Thank you, thats the one.
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Comment by George Lazarette posted on Pentax equipment web site at 20/02/2008 - 08:10
A RAW file is not an uncompressed JPEG. Pentax RAW's are 12 bit, and JPEGs are 8.
Getting back to the question can you alter a RAW file, yes it's possible but very difficult even with specialized software as I understand it the de-mosaicing/re-mosaicing algorithm is lossy, it's not an absolute conversion. I expect that any editing to alter content would need to be done in a full colour environment, if you've ever seen a RAW file displayed without de-mosaicing you'd appreciate why.
Any one pixel can only represent one colour, so any one JPEG pixel has 8 bits of information about whichever colour is represented. A RAW pixel has 12 bits.
I think what you were trying to say was that all the pixels in a RAW image are pre-defined as being either red, green, or blue. JPEG pixels are not pre-defined, so in theory there are 24 bits of information that they could contain, of which only 8 will actually be contained.
Is that right?
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Comment by George Lazarette posted on RAW+JPEG WHERE??? HOW??? at 05/03/2008 - 19:18
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Comment by George Lazarette posted on RAW+JPEG WHERE??? HOW??? at 04/03/2008 - 08:05
Nothing wrong with that. In fact, it's rather touching.
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Comment by George Lazarette posted on New member from Canada at 15/02/2008 - 20:59
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Comment by George Lazarette posted on Does your camera have any stuck pixels? at 18/02/2008 - 08:41
I would try a really tight crop.
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