Skies going bad when converted to mono...

kennysarmy

kennysarmy

Yeah but can your army do this?
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Jeff
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As an example I give you this one:

4375694356_375b870fb1.jpg


http://www.flickr.com/photos/kennysarmy/4375694356/

If you look at the large size you can see lots of pixelation creeping in.

Is there anyway to prevent this?

Regards.
 
Looking at the original size on Flickr you can see evidence of pretty heavy levels of sharpening on the edges of the tower.
My guess is that the sharpening method you used sharpened the noise in the sky. If you had already bumped up the contrast in the sky then that would have exaggerated the problem.

You need to use a sharpening technique that only sharpens the edges - there are quite a few threads on this. Here's one, and another, and another.
Have a play and report back :)
 
I think the "edge" issue was made worse by trying to "reduce noise" in the sky and not feathering the selection cleverly....

Might have another go but suspect I'd get the same results in the sky - I use PS3 and find some of the preset mono conversions make a real mess of the sky - I try and choose ones that make the least posterisation but they are nt always the best ones for the rest of the shot...
 
Do you shoot in Raw Jeff? If so, you may be better doing your mono conversion whilst in Adobe Camera Raw which may mitigate the posterisation issue by having more bits to play with.
 
Have a play in DPP too of course - try the yellow filter in the monochrome options to deepen the blue sky [apologies if I'm teaching you to suck eggs!].

Latter versions of ACR have more flexibility [?too much flexibility] wrt mono conversions vs DPP [simpler but fewer options].
 
hi Jeff iv had a gander on your original sized flickr post, It does look like over sharpening and then noise reduction that may have caused this I can see from the exif that your iso is 100 so no probs there your shutter speed all seem fine however I notice your dpi is 626 which seems unnecessarily high I doubt this will influence your image in anyway but it did seem odd.
Can you post the original Jpg in colour unprocessed?
Has the image been cropped?
have you lightened/darkened or altered the sky to try and pull detail from it? as this could be your problem... in this instance if your sky aint hot to trot with an image such as a castle or something with nice solid lines you can either waste hours trying to drag detail from a poor sky or minutes dropping one in you made earlier. sorry if you now have an egg in each cheek and your pants have disappeared up your backside from sucking so hard; just trying to give my 2 pence worth hope it helps
Ta Andy
 
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