Best downsize technique

[Tommy Timebomb]

I have an image that is 16 x 9 Inches 72dpi that I want to print at 8 x 10.
I will keep the aspect ratio and fill in the border with black etc.
My question is when I downsize should I keep the 72 dpi or is there any benifit in pumping up the dpi.
And if so by how much, seeing it's getting printed I would not want anything below 200 ideally?
What would be the best way to downsize and keep/improve quality Pls?
Cheer's Tom

 

[revnart]

DPI is density of "pixels" in each inch. If you want you can set smaller print size and let photoshop automatically adjust DPI, so you will not loose any data, and printed image will be cleaner and sharper (depends of course on printer).

 

[Tommy Timebomb]

So is it 'bicubic sharpen reduction' and leave the res at 72dpi pls?
The printer is my local photography shops professional kit.

 

[SMOk3]

let photoshop automatically adjust DPI

As revnart says.Ps will adjust this automatically like so:

 

[Tommy Timebomb]

So I simply {no need for convert to smart object} Punch in my new width/height and keep original size?
Should I use 'bicubic sharpen reduction' .
I really need a short step by step as I want to get it right?

 

[Akshat]

I think it depends on your image that rather you should use bicubic sharpen or not.
Bicubic Sharpen may work well on large un-sharpened soft images. It does not work well on images that already have been sharpened.
And anyways Adobe added the new interpolation method Bicubic Automatic in CS6.
So just leave it to photoshop to decide.

 

[Tommy Timebomb]

I think it depends on your image that rather you should use bicubic sharpen or not.
Bicubic Sharpen may work well on large un-sharpened soft images. It does not work well on images that already have been sharpened.
And anyways Adobe added the new interpolation method Bicubic Automatic in CS6.
So just leave it to photoshop to decide.

Thanks, Nothing is straight forward lol.
I've been messing with this stuff for a long time but have never got my head around resizing.
I'll give it a go. Thnx

 

[Akshat]

Maybe you can try asking the guys from the shop, as its there printer and they have experience in this, they might be able to suggest you about what works batter.

 

[Tommy Timebomb]

Maybe you can try asking the guys from the shop, as its there printer and they have experience in this, they might be able to suggest you about what works batter.

Yep, they're more than used to my questions by now.