Viewfinder and screen gives you options. I have two 8mp, screen only, that will go in a band-aid box, sized cameras, that go in my pocket, fishing, hunting, touring, or going to major life events. (Weddings,birthdays etc.) Unless I really want bigger camera. I floated thru Grand Canyon with a Fuji camera that looks alot like Plumbs and got great shots. But it is only 5 mg so no great blow-ups.
All that said a view finder in a non-slr camera, slr = actual through the lens view, is usually just a small screen. But as st8 said there are light situations when a screen is hard to see. I also can get better composition and keep angles and lines even or not. No crooked picture of your kids birthday cake table. With only a screen this is just a hair more likely to happen. There is actually one instance where a screen is much better, when your standing in a crowd and you hold your camera up to snap a shot over the heads of folks in front of you.
But we are talking knife photos. Looking thru a view finder darkens the area around your eye and lets you preceive color and light better.
A screen is out in the open light and you just see the view differently. It will work, but just not as 'high craft' as the darkened viewfinder view. Again, if you are buying a quality big migpixel camera, one with viewfinder and screen gives you more options to make your shot.
The Canon g- series as recommended by Bigd I believe will have that.
If I was going back and gonna buy a new "knife special' camera, I would be looking at those 10/12 Mp pointandshoot cameras with all the bells and whistles. When I am holding $1500 of camera, fiddling with all the adjustments, I remember the quality of my old 5mp PanS and shake my head. Now that is a knife specific situation. You want to photo a hummingbird across the yard its all a different deal. Big telephots is the name of the game then.
All that said, I will still be using my slr tonight looking thru the viewfinder and at the screen, I have it, its working, its paid for. I guess I will just have to suffer the adjustments.
300Bucks/ch
There is nothing wrong with this 5 mp photo from my old point and shoot, but if you say what does it say on the serial numbers, I blow it up to full size and all the mp halo dots start showing up.
Blown up a little, 10 or 12 mp would still be pretty sharp at this level.