Re: "Lossless Compression" creates artifacts in A7r
MaxBerlin wrote: hrossm wrote:
I thought I had horrible posterisation issues on my first serious A7r shots - then I printed one and saw no issues. Sent the RAW to my bro and he saw nothing wrong. Time for a new monitor!
This may not work for everyone but it stopped me panicking
What size did you print at ?
What capture and export are you using ?
I sincerely want to find a solution.
My problem was much more obvious than yours - I could see it on screen in the \'FIT\' view in LR5.3RC and it vanished with an A4 print (similar size) from my laser printer. I\'m kind of assuming an inkjet print would be similar, I can\'t imagine it would be \'blockier\'.
Although I don\'t think it is the same effect as you are seeing I posted it as a general warning that you should not always believe what you see until you have eliminated possible weak links. Although my bro and I both have Dell IPS monitors he didn\'t see the effect (also using LR5.3RC) but then he has a different model.
It was in an area of gradual change in tone of the sky at dawn and was exaggerated with an 18mm lens vs a 28mm. I\'ll try to get myself a Flickr account and post the shots - putting them on my website murders my bandwidth allowance (cheap hosting!).
I also got the same effect at sunset with the 28mm (all lenses C/Y Contax Zeiss) but on shots taken when I swung away from the sunset the effect vanished.
There was heavy apparent vignetting with the 18mm dawn shots, less with the 28 dawn/sunset and none obvious with the 28 pointing away from the sunset. I say apparent vignetting because it was centred on the brightest area of sky, even when that was off centre, so is probably just the natural variation in tone of the sky given the wide view of an 18mm on FF.
Just to give you a laugh...........the only reason I made the print and found the immediate problem to be the monitor was as an example to go with a letter I\'d written to Sony about the (non) problem
Dec 15, 2013 at 11:05 AM
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