enlarging

[arken]

I am a teacher and I would love to enlarge my pictures of my class. I was wondering how big can I enlarge without loosing too much of the picture--before it's too grainy---can I enlarge 24x 30? I have a canon 20D----I am still learning a lot about it's function and capabilities. I have another silly question about the megapixel---how do I change the megapixel --so it would be on the highest possible. I think it's a 8.3 megapixel. I am trying to find a class locally to learn all this stuff. Thank you for any advice.

[forno]

If ist similar to my 350d the whne you hit the menu buttoon you will see 4 tabs
The first one will have a icon od f the camera and a 1 next to it

Press the down arrow and select either L with the smooth geometric shape next to it or scroll right to the bottom and select RAW+L as the RAW file will give you the highest qaulity file you camera can record

Im a noob so dont take that to the bank:)

[timmciglobal]

Assuming you print @ 150 DPI

3500X2330 = 23X15 or so.

You could upsample to get a 24X32 probably so long as your not looking too close at it.

Tim

[noyjimi]

What the other posters said -- you can easily upscale it to very large print sizes if necessary (try bicubic resampling). At those sizes, it makes sense to stand further away from the print, so it still looks great.

We're not talking about a class topic on different varieties of loupes, right? :D

[coldrain]

Well, contrary to what the posters above say, you do not have to upscale or interpolate the photo. Just print it in the size youw ant and it will be fine. The bigger you print the photo, the less it matters what pixels per inch you see... the bigger you print a photo, the farther away you need to stand from it to look at the photo.

Do yourself a favor and go look up close at commercial posters some time and see what quality they have up close... you will be amazed.

Don't think you have to print at 150 or 300 dpi, those figures are often misused and not understood.
And remember... you can look at a photo and appreciate it on your screen too... and that is between 72 and 90 pixels per inch. That should tell you soemthing about how big you can print a photo and still enjoy it at its size.

[timmciglobal]

ROFL.

Yeap, it's why fredmiranda sells an entire line of resize actions BECAUSE YOU SHOULDN'T USE THEM.

Coldrain has made it his life mission to follow my posts and disagree with all of them now because I "betrayed the canon camp."

Resized and properly sharpened post resizing shots will look much better then using the original fille just uploaded. Many people have said it, I've personally tried it.

Tim

[Rhys]

While I have never resized to a terrifically large print, I can say that I have printed 3mp to A4 (8.5x11) very sucessfully. Given that most printers use dithering (another name for interpolation) to achieve their photo quality printing, I should imagine that you'd be able to print to the large sizes mentioned without too much image degradation. If you do a test print first, enlarging to the size you want but printing only a portion of the image (to save ink) then you'll be able to see the enlargement limits.

[ktixx]

I am a teacher and I would love to enlarge my pictures of my class. I was wondering how big can I enlarge without loosing too much of the picture--before it's too grainy---can I enlarge 24x 30? I have a canon 20D----I am still learning a lot about it's function and capabilities. I have another silly question about the megapixel---how do I change the megapixel --so it would be on the highest possible. I think it's a 8.3 megapixel. I am trying to find a class locally to learn all this stuff. Thank you for any advice.
I recently purchased a few 20x30 prints from this site for some customers: http://www.elcocolor.com/poster_special.htm. The shots were all taken with my 20d and they came out excellent - the customers were really pleased. Plus, that website is incredibly cheap when it comes to large prints. All I did was a little sharpening (USM) in photoshop and they do the rest.
As mentioned above - when you stand a foot away you can see a little "digital distortion" but if you are standing a foot away you can't see the entire print! Standing a few feet away and the print looks flawless..
Ken