Having trouble opening them in what?
You haven't really given us any useful information for us to help you.
Well, they get sent to various people, so they will have to open the images in the programme they have on their computer,
jpg's can be opened in various programmes can they not??
jpeg can be opened in quite a large variety of programs. Are you hearing the complaint from everyone? That would imply a problem with the files. but if only some people have a problem that implies a problem either with systm configuration on their end, the method they've chosen for opeing the files, or possibly damage to the files in transit (though that is more likely to prevent them from opening at all).
You say you want them good enough quality and that you reduced them by 30%.
But that doesn't tell us anything really - unless I work it out myself.
Well - 14mp is roughly 4500px x 3100
But you haven't said if it's RAW or in JPG?
Well if it's already JPG then it will be 72 ppi I presume
So at 4500 x 3100 it would be 4500/72 and 3100/72 = 62.5 inches x 43 inches
Reducing this by 30%
= 44 x 30.1 inches
but this is still at 72 ppi
Is it for Print or Web?
If it's for Web then these are HUGE (3150 px wide (where the average res of a monitor is about 1200 - 1920 px wide))
If it's for print - then 44 inches @72 ppi is fine for Large Format (like signage - but honestly you would should send the largest you have available)
But if it's for a magazine then you need to change the 44 inches @ 72 ppi to 300 ppi
Which would give you 10.56 inches x 7.2 inches
Which is about the size of an A4 page.
Basically they are being sent as attatchments to emails, so only need to be opened and viewed on screen.
So is a jpg the best way to do this, and what is the maximun bytes it should be to open on an average run of the mill computer so the file is not too large??
For an email attacment that just needs to bee seen on screen, jpeg is a fine format. make a copy and reduce the dimensions to around 1024 pixels wide and see how it opens on your system in a generic viewer like Preview on Mac or Windows Picture Viewer.
It's impossible to predict the final file size for a jpeg before you compress it, but you want to shoot for a file measured in kilobytes, not megabytes, to send as an attachment.
Okay, thank you for the help
, and when the jpeg options box appears (whn saving from photoshop) is it okay to save as medium or low quality?
I have tryed one and saved as medium quality, and this makes a file size of 147 KB .. so this should be fine for people to open and not too huge?
Should be fine. If you're happy with the quality at medium, go for it. That's better than many images on the web.
okay thank you Peter!