How much Unsharp Mask?


ChrisA

Link Posted 19/09/2012 - 08:55
I have this pano that I'm going to re-edit and then get printed up at 40 inches wide (Photobox have an offer on just for today - a 40x30 print for a fiver).

Please could someone advise how much USM is appropriate for something this big?

Normally for a 1000px image I'd use about Amount = 40, Radius 1 pixel, Threshold 0, and I'm aware that for larger images it should be more.

So...

- how should I view the image on the screen
- what would be a good rough place to start with the USM settings.

Many thanks!

PS - the offer code is 1POSTER, and it's available for one print only, up to midnight tonight.
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Pentax K-3, DA18-135, DA35 F2.4, DA17-70, DA55-300, FA28-200, A50 F1.7, A100 F4 Macro, A400 F5.6, Sigma 10-20 EXDC, 50-500 F4.5-6.3 APO DG OS Samsung flash SEF-54PZF(x2)
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ChrisA

Link Posted 19/09/2012 - 08:58
Actually, another quick question:

The image I'm working with is currently 17000 pixels wide and 3000 pixels high.

Should I convert it to JPG at that size and just let them take care of the sizing, or should I resize it somehow?

Edit: might have answered my own question here. They say up to 25 MB, so I guess as big as possible consistent with that?
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Pentax K-3, DA18-135, DA35 F2.4, DA17-70, DA55-300, FA28-200, A50 F1.7, A100 F4 Macro, A400 F5.6, Sigma 10-20 EXDC, 50-500 F4.5-6.3 APO DG OS Samsung flash SEF-54PZF(x2)
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Last Edited by ChrisA on 19/09/2012 - 09:13

johnriley

Link Posted 19/09/2012 - 09:21
The best option is to follow their specification, but certainly to resize yourself using Photoshop. Size as required, 300ppi, sRGB. When resizing, always use the default resampling Bicubic. If you have an appropriate version, for upsizing use Bicubic Smoother.

USM for a large file like that, I would start with 125%, radius 2.2 pixels, threshold 3.

The recommendations I have given assume you have no more specific requirements from the printer and they should do for any print house to work with.

As for 1000 pixel wide images, while we're on the subject, I use 50% (K-5) 75% (Q), 1.3 pixels radius and threshold 3.

File can happily be saved as a quality 12 JPEG in all cases, avoiding using the optimised option, which can cause compatibility issues.

Hope that helps!
Best regards, John

johnriley

Link Posted 19/09/2012 - 09:22
You could also look at Peak Imaging, who are excellent, reasonably priced and ultra fast. If you were to upload your image this morning you should get the print tomorrow.
Best regards, John

steven9761

Link Posted 19/09/2012 - 10:35
Lovely pano, Chris!! This will definitely look good as a framed print, hung on a main wall! If you also have a triple (or even quad!) monitor set-up there, try looking at link for some inspiration. I think there's even a chance to sell your work via the site.

MattMatic

Link Posted 19/09/2012 - 12:57
For most print sharpening, I view at 50% within Photoshop and adjust USM/Smart Sharpen with the Preview button checked (and toggle it off to see the comparison).

Works for me
Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)

ChrisA

Link Posted 19/09/2012 - 13:17
Many thanks for all the suggestions. Could I now ask which of these two you prefer:

This one (darker, more contrasty)...

Or this one (possibly a bit more natural).

I don't have much experience guessing what the print will be like from the web display, so any experience from others will be much appreciated.

Suggestions gratefully received - there's only one shot with the PhotoBox offer for the 40x30 at as little as a fiver!!
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Pentax K-3, DA18-135, DA35 F2.4, DA17-70, DA55-300, FA28-200, A50 F1.7, A100 F4 Macro, A400 F5.6, Sigma 10-20 EXDC, 50-500 F4.5-6.3 APO DG OS Samsung flash SEF-54PZF(x2)
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Last Edited by ChrisA on 19/09/2012 - 13:18

johnriley

Link Posted 19/09/2012 - 14:03
I prefer Version 1, but it's a personal choice.
Best regards, John

ChrisA

Link Posted 19/09/2012 - 14:42
johnriley wrote:
I prefer Version 1, but it's a personal choice.

Yes, I'm leaning that way too

Unfortunately, I'm having a bit of trouble recreating that look! It was only supposed to be a quick and dirty edit just to see how it might turn out, and I didn't write down what I did.

I so wish you could store the edit history with an image, as well as the image itself.
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Pentax K-3, DA18-135, DA35 F2.4, DA17-70, DA55-300, FA28-200, A50 F1.7, A100 F4 Macro, A400 F5.6, Sigma 10-20 EXDC, 50-500 F4.5-6.3 APO DG OS Samsung flash SEF-54PZF(x2)
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Smeggypants

Link Posted 19/09/2012 - 22:16
The contrasty one. the other looks washed out here
[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283

davidstorm

Link Posted 19/09/2012 - 22:23
I prefer #1 also, but would maybe aim for something that is 2/3 of the way to #1, when compared to #2, as you may have lost a little too much of the shadow detail on #1. It's very difficult to tell at the resolution I'm viewing at, especially on a laptop screen.

Regards
David
Flickr

Some cameras, some lenses, some bits 'n' bobs
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