I'll just jump in here and confuse things a bit. You'll always get the
same number of pixels from any given camera, but the quality of the
pixels count too. Higher ISO will have an effect.
Usually all things being equal higher noise which will degrade image
quality in any give size print. www.imaging-resource.com has a section
of their reviews dedicated to how large a picture you can print based on
the sensor's maximum pixels and ISO.
You might want to check out if they have a review of your model and see
what they have to say.
On 9/5/2019 11:57 AM, Eric Weir wrote:
On Sep 5, 2019, at 11:50 AM, John <jsessoms...@nc.rr.com> wrote:
On 9/5/2019 11:08:33, Eric Weir wrote:
So now two questions: (1) My image is 72 dpi/ppi, far short of 240 dpi/ppi.
What can I do with that, i.e., what’s the largest print I could get? (2) The
camera was my phone, an iPhone 6s. The 72 dpi/ppi result was with iso at 25.
Is what I should expect? Will I ever be able to get good large prints with
this camera?
No, your image is 4032 x 2268 pixels.
72 dpi is the display resolution. Has nothing to do with printing.
Printed at 240 ppi, 4032 x 2268 pixels will give a print 16.8" x 9.45".
A good "printer" (i.e. service bureau like Bay Photo) can probably work with 200 ppi to
give you a print up to 20.16" x 11.34" which could be cropped to the 20x10 print you
wanted.
... although the guy in the back actually doing the printing is probably going
to call you bad names. They much prefer at least 300 ppi.
But, when I was running the mini-lab I could get an "acceptable" result with as
little as 150 ppi (C-type on Kodak Endura glossy paper).
OK, now I understand. (I think.) One last question. (I hope.) What determines
the size of the image I get with my camera, i.e., my phone? Is it always the
same? Is iso a factor?
------------------------------------------------------------------------------------------
Eric Weir
Decatur, GA USA
eew...@bellsouth.net
"The invincible shield of caring Is a weapon
sent from the sky against being dead."
- Tao Te Ching 67
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