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Old Apr-07-2012, 06:25 PM
#1
JSPhotography is offline JSPhotography OP
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Export size
I'm starting out with a 7meg jpg file, some adjustments and slight crop in LR4 and my export is only 700kb. Quality is at 100 and 34,00dpi. I don't print much, LR is new to me and this will be a 16 x 20. Will it be OK?
Old Apr-07-2012, 10:23 PM
#2
Gary752 is online now Gary752
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Quote:
Originally Posted by JSPhotography View Post
I'm starting out with a 7meg jpg file, some adjustments and slight crop in LR4 and my export is only 700kb. Quality is at 100 and 34,00dpi. I don't print much, LR is new to me and this will be a 16 x 20. Will it be OK?
Double check the dpi setting when you export, and make sure you didn't set it to 34.00. I have mine set to 300 and I don't lose hardly anything when I export a jpg from a jpg. But then again, I'm not cropping the jpgs, as they were already cropped from the raw file.

GaryB
Old Apr-08-2012, 04:47 AM
#3
JSPhotography is offline JSPhotography OP
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Originally Posted by BroPhoto View Post
Double check the dpi setting when you export, and make sure you didn't set it to 34.00. I have mine set to 300 and I don't lose hardly anything when I export a jpg from a jpg. But then again, I'm not cropping the jpgs, as they were already cropped from the raw file.

GaryB

Thanks, dpi is deffinatly 34,000. I didn't know exactly what was needed so I looked up the max value I could specify.
Old Apr-08-2012, 10:32 AM
#4
arodney is offline arodney
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FWIW, nothing is gained using 100 quality in LR. see:
http://regex.info/blog/lightroom-goodies/jpeg-quality
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Old Apr-08-2012, 10:38 AM
#5
pathfinder is offline pathfinder
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If you are printing this image yourself, just print your file from Lightroom itself, no need to alter the file.

If you are exporting the file to an outside vendor for printing
, you will want a minimum of 200 pixels per inch along each side of the print.

16 x 200 = 3,200 pixels for the short side, and 4,800 would be better.

20 x 200 = 4,000 pixels for the long side. 300 ppi would be better, and would be 6,000

3200x4000 = 12.8 megapixels for a 16x20 inch print at 200 ppi.

dpi is a printer specification

I think you are referring to pixels per inch needed for a quality print, which many would consider 200 ppi.
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Old Apr-08-2012, 03:51 PM
#6
JSPhotography is offline JSPhotography OP
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Quote:
Originally Posted by arodney View Post
FWIW, nothing is gained using 100 quality in LR. see:
http://regex.info/blog/lightroom-goodies/jpeg-quality


Thanks for the link, interesting read.
Old Apr-08-2012, 04:00 PM
#7
JSPhotography is offline JSPhotography OP
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Quote:
Originally Posted by pathfinder View Post
If you are printing this image yourself, just print your file from Lightroom itself, no need to alter the file.

If you are exporting the file to an outside vendor for printing
, you will want a minimum of 200 pixels per inch along each side of the print.

16 x 200 = 3,200 pixels for the short side, and 4,800 would be better.

20 x 200 = 4,000 pixels for the long side. 300 ppi would be better, and would be 6,000

3200x4000 = 12.8 megapixels for a 16x20 inch print at 200 ppi.

dpi is a printer specification

I think you are referring to pixels per inch needed for a quality print, which many would consider 200 ppi.
Thanks Pathfinder. I think I have the basics figured out now. My biggest problem was not knowing what I needed from a pixel standpoint for a quality print job. I'm good now.
Old Apr-08-2012, 05:39 PM
#8
pathfinder is offline pathfinder
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http://pathfinder.smugmug.com/Other/...2246604_8fVpw8

A short discussion of image pixel sizes needed for printing
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