Olympus UK E-System User Group

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-   Exhibitions, stock photos, professional work (http://e-group.uk.net/forum/forumdisplay.php?f=50)
-   -   Printing very large! (http://e-group.uk.net/forum/showthread.php?t=48269)

Phill D 6th July 2018 06:31 AM

Printing very large!
 
I was asked recently by my Daughter if I could provide an image that could be printed up to over 3m x 2m to be put on a wall in their office. I've provided one and will be intrigued to see how it looks when it's done. I was wondering if anyone else has had a 4/3s image blown up large and what it looked like?

Phill D 6th July 2018 06:52 AM

Re: Printing very large!
 
Here's the image she chose.

http://e-group.uk.net/gallery/data/5...P7040690-3.jpg

Petrochemist 6th July 2018 08:59 AM

Re: Printing very large!
 
A lovely peaceful scene that should help keep the office calm :)
I've never printed anywhere near that big. Only twice to anything bigger than ~A4.
One of my large prints worked well the other was disappointing, probably because it was cropped more.


It might be worth producing a calculated crop to print to A4 that will reflect the final output. Big prints get expensive & the crop might give some idea of how it will work out. People will no doubt end up looking at it close up...

Ricoh 6th July 2018 10:05 AM

Re: Printing very large!
 
WhiteWall are recommended by the people I know print large for exhibitions.
Here’s a link: https://r.search.yahoo.com/_ylt=AwrL...6R9M_xhco5ck4-

Do the maths (math for our American cousins who have no idea what I’m talking about :) ) to see how close you get to 300dpi from such a massive enlargement. Another factor is the viewing distance, but you have little control over that unless you erect a barrier to prevent close inspection. At 3x2 m you probably want a viewing distance of 5m or so.
What’s your scaffolding skills like? :)

Phill D 6th July 2018 11:08 AM

Re: Printing very large!
 
I think office calmness was the idea Mike so hopefully it will be suitable. Mind you even at full size resolution enlarging to that size won't give many pixels per inch (approx 50dpi i think) so yes it might look a bit iffy close up. There will be some equipment in front of it so I guess people won't generally be closer than 3m away. Hope that will be far enough Steve.

Crazy Dave 6th July 2018 11:14 AM

Re: Printing very large!
 
Hi Phil

Two year ago, I was fortunate enough to have one of my images used for a poster campaign by the National Portrait Gallery. It appeared throughout the London Underground network and measured about 6’ x 4’. They had a Tiff file taken with my EM-5 Mk 1 so 16MP sensor. They also had a poster suspended in the gallery itself that was even larger.

Don’t know if that helps but hopefully you can push the limits without it costing you an arm and a leg.

Good Luck!

David

shenstone 6th July 2018 11:21 AM

Re: Printing very large!
 
As said above it all depends on the quality you want in the end and how close

I printed this (bigger file size obviously)

http://www.e-group.uk.net/gallery/data/500/pen6.jpg

and a number of other pictures from that shoot off on an AO plotter 841 x 1189 mm and it looked fine for the purpose of a book launch. they looked fine on the wall from a couple of feet away - so much so that I was asked for copies properly printed by a few people there

for "wallpaper" it should be OK even at that size

If you are unsure how the printer will handle the upscaling then do that to the file before you send it so you can see what a 100% version looks like from a few feet away before you send it.

Regards
Andy

OM USer 6th July 2018 12:16 PM

Re: Printing very large!
 
Quote:

Originally Posted by Phill D (Post 450491)
Here's the image she chose....

A nice calm serene picture. Great choice.

Phill D 6th July 2018 02:47 PM

Re: Printing very large!
 
I'm not worried about the price as the company she works for is getting it printed and also put on the wall. I'll just be keen to see how it turns out.

Zuiko 6th July 2018 05:07 PM

Re: Printing very large!
 
I went to an exhibition by David Noton several years ago and he had some fantastic large prints of this sort of size, taken with a 16mp full frame Cannon IIRC. Don't forget you can upsize the file to a certain extent and you won't need anything like 300ppi when printing this big. Nice picture!

Jim Ford 6th July 2018 09:48 PM

Re: Printing very large!
 
Quote:

Originally Posted by shenstone (Post 450505)

Is that Cribyn in the Brecon Beacons?

Jim

shenstone 7th July 2018 06:52 AM

Re: Printing very large!
 
Close. It's Pen-y-fan from Corn Ddu. Cribyn is the next peak, hidden from view

Phill D 7th July 2018 07:32 AM

Re: Printing very large!
 
Andy did you use the hires mode for that one?

shenstone 7th July 2018 08:35 AM

Re: Printing very large!
 
No.

That was taken with the E620 with the kit lens. I was doing training for the 3 peaks and borrowed the Mrs camera as it was lighter than my E30 with the 14-54

I have not tried High res mode for anything since I got my EM1.2 - if I can go that big with a 12Mp sensor I have enough for anything I want to do with 20

As I said it was printed on a plotter so not pixel perfect up close, but definitely worked

Regards
Andy

pdk42 7th July 2018 10:12 PM

Re: Printing very large!
 
When upsizing, the trick is to use interpolation to add pixels that wouldn't otherwise be there. Bi-cubic interpolation is the most common. This means that you'll be seeing apparently more DPI than a straight enlargement calculation might indicate. You obviously can't add detail that isn't there, but using interpolation will preserve apparent sharpness if you go looking closely.

Apps like Photoshop will do interpolative upsizing so you can do it before you send the image for printing. I'd hope that a decent print shop would do it for you though before they print if you hadn't done anything yourself.


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