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Export large image help

New Here ,
Jul 15, 2021 Jul 15, 2021

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Hi I have exported my 6720 x 4480 image from Lightroom at 300dpi however the client says that it is not large enough to print to 30"x40". Is there anything I can do in export it to print at the requested print size?

Thanks in advance.

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How to, Import and export, Mac

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LEGEND ,
Jul 15, 2021 Jul 15, 2021

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Was a reason given?

When you export your 6720x4480 image, what pixel size (width and height) did you export it at?

 

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New Here ,
Jul 16, 2021 Jul 16, 2021

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I leave as original.

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Adobe Community Professional ,
Jul 15, 2021 Jul 15, 2021

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An image that's 6720 pixels wide divided by 300 = an image that is 22.4 inches. 

 

If you need to get that 30" width you need 224 ppi.

 

So, why is this OK? That's because that "magic" 300 dpi is for fine books where the distance of the nose to book distance is within hands reach. But when you're dealing with a 30" wide image, only the "pixel peepers" will stare into the item with their nose into the print and (maybe) see a difference.

 

In that regard, have you ever considered the resolution of a billboard? Trust me, it's not 300 ppi.

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New Here ,
Jul 23, 2021 Jul 23, 2021

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Hi thanks for the info. So I give them a smaller (224) ppi for a larger canvas print size?

Sorry to sound like a dummy, what is the the resolution of a billboard?

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Adobe Community Professional ,
Jul 23, 2021 Jul 23, 2021

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A poster needs a minimum resolution of about 100dpi if viewed at 6ft (2m). Viewed at 30ft (10m) a billboard needs a minimum resolution of about 20dpi.

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LEGEND ,
Jul 15, 2021 Jul 15, 2021

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Do you have ON1Phto RAW? That includes ON1 Resize (also available as a seperate purchase)  you can do an edit in, and resize it to clients desire, actuall to 30x40

 

https://www.on1.com/videos/enlarging-your-first-photo-in-on1-resize-2021/

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New Here ,
Jul 23, 2021 Jul 23, 2021

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Hi I had never even heard of this. Thank you I'm looking into it.

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Adobe Community Professional ,
Jul 15, 2021 Jul 15, 2021

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If your image file is a raw file 6720 x 4480 pixels I would suggest you do the following, use the Super Resolution feature in LrC to double the file size to 13440 X 8960 which will come close the the 300 PPI you require for a 40” X 30” which is 12000 X 9000 pixels. So you do not require another software application like ON 1 Raw.

It will be necessary to crop the Super Resolution file to 4x3 ratio so you eventually have 11946 X 8960.

 

Regards, Denis: iMac mid-2015, 5K 27”, GPU 2GB, Ram 24GB, HDD 3TB, macOS 11.6.1, LrC 11.0.1, Lr 5, Ps 23.0,; Camera OM-D E-M1.

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New Here ,
Jul 23, 2021 Jul 23, 2021

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Ok that sounds like a plan.

Thank you.

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Adobe Community Professional ,
Jul 15, 2021 Jul 15, 2021

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There is no need for 300 ppi at this size! That is a misunderstanding and you need to educate the client.

 

Do not upsample unless absolutely necessary to avoid visible pixels - which is to say, almost never, and certainly not in this case. 6720 x 4480 pixels is plenty enough to work for any practical purpose. It will work as-is here.

 

Super resolution works well when you need it. But it's not needed here. It won't improve the image, it won't make it look any better.

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Adobe Community Professional ,
Jul 16, 2021 Jul 16, 2021

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The question in this case is: do you try to educate your client (and possibly upset him) or do you simply give him what he asked for?

 

-- Johan W. Elzenga

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New Here ,
Jul 16, 2021 Jul 16, 2021

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@D Fosse thanks for the info, its what I thought.

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Adobe Community Professional ,
Jul 16, 2021 Jul 16, 2021

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I guess the author of the thread has enough info to decide how to proceed.

 

Regards, Denis: iMac mid-2015, 5K 27”, GPU 2GB, Ram 24GB, HDD 3TB, macOS 11.6.1, LrC 11.0.1, Lr 5, Ps 23.0,; Camera OM-D E-M1.

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New Here ,
Jul 16, 2021 Jul 16, 2021

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Thanks everyone for your knowledge and help

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LEGEND ,
Jul 23, 2021 Jul 23, 2021

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Be sure to post back here on what your solution was for others future info,

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