Printing a 16x20- Help

Hi all, I am trying to get a print in a 16x20. I need to know if I am supposed to let the lab color correct or not. I had a print done and didn't have them color correct and I thought the colors were more vivid on my home computer. The colors in the print I want done are very important. Also I noticed when I cropped to 16x20 the resolution was set to 146. Is this going to be enough to do a 16x20? The camera I use is a 20D so the file size is 3504x2336.

Thanks in advance
Brittany

My lab provides me with an ICC profile to use. I apply this and then never let the lab do any further color corrections for me. To a large degree I think this is a personal decsioin.

I personally think that 146 sounds a bit low. The large prints that I have made I use the crop tool, input the appropriate size and I will keep the resolution on the high side. It has not failed me yet.

ssim wrote in post #3356153
My lab provides me with an ICC profile to use. I apply this and then never let the lab do any further color corrections for me. To a large degree I think this is a personal decsioin.

I personally think that 146 sounds a bit low. The large prints that I have made I use the crop tool, input the appropriate size and I will keep the resolution on the high side. It has not failed me yet.

PS automatically adjusted the res for me. I didn't think you could just change the resolution setting. The 146 I got was done automatically when I put in the size. Can you tell me how I should go about changing the resolution then?
Thank you

I print through WHCC and the resolution they want you to use is 300...in most graphic programs, you can change this via the same place you would change the Image resize...Also, in your camera itself, you should check what you ahve your file size set at...the 20D can save anywhere from RAW to Large/Fine down to Small/Normal with several settings inbetween.

britt777 wrote in post #3356233
PS automatically adjusted the res for me.

If you were using the crop tool, just clear out the resolution box as shown in the example below. As a result, Photoshop will not resample the image but leave the current resolution in the document when cropped.

As a general rule; 180dpi & up is sufficient for Newspaper prints, etc and 220dpi & up is best for magazines & higher quality printing. 300dpi is best for high quality photographic printing. To be safe, stick with 300dpi on any print unless filesize is an issue. For your needs, you'll want to resample your image for a quality print; unfortunately, quality may suffer a bit because Photoshop adds its own pixels when upsampling. You may need to use Unsharp Mask or other post processing to regain the crispness of your image if there's a substantial difference. The overall results of upsampling will be better for an enlargement because you won't have the ugly pixel blockiness associated with an undersampled, oversized image...hope that makes sense?

As far as the best way to effectively increase the size of an image, Eyecandy offers a brilliant plugin for Photoshop that does just that. You could download the free trial version and apply the effect to your image to see the results. If printing enlargements are a large part of your business, it may be a tool worth investing. http://www.eyecandy.co​m/blowup/index.html

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