What version of LR 5 are you using? You should be using LR 5.6: http://www.adobe.com/downloads/updates/
Please enable the Zoom slider on the toolbar in LR using the little arrow to the right of the toolbar, so we can see what Zoom you’re showing us examples of, and show us screenshots of 1:1, not Fit.
The reason Fit zoom looks different between Develop and Library is there are different resampling algorithms being used. Develop needs to show a new view every time you move any slider, so it uses the fastest, least accurate resampling algorithm; whereas Library has the benefit of previews of various smaller-than-full-size previews computed over several seconds in the background, so tends to be more accurate.
Depending on the version of LR 5, sometimes the Develop view is artificially sharper than Library and sometimes Develop is artificially smoother than Library. There is an exclamation in a circle in the Details adjustments section that says to use 1:1 for a more accurate Preview.
There were some bugs in earlier versions of LR 5 where anything resized smaller than 1/3 of the original size during Export didn’t have sharpening or noise-reduction applied, but that’s the only actual bug, which has since been fixed. Anything I’ve seen reported recently is caused by expecting the Fit view to be accurate in Develop. Fit in Develop is for judging Toning and Lens Corrections adjustments. 1:1 zoom or higher should be used when doing pixel-level Detail adjustments such as sharpening and noise-reduction.
Yes I am using LR 5.6. Why show an image that is artificially sharper in Develop? It's akin to dangling a carrot in front of a donkey! Thanks for the reply.
Leaving aside ssprengels comments (though I'm sure they are correct), it's not something I see. Just checked several photos at various zooms and flicking between Develop and Library mode I really can't see a difference before or after processing (whereas I can see quite clearly the difference in your shots).
The excessive use of the Detail slider is likely a contributing factor to the overly sharp Develop-Fit view and perhaps why Nic's are less inaccurate.
Here is the first part of a three-part sharpening tutorial that describes how LR is designed to be used:
Sometimes sharpening includes blurring things that are less important:
Wow! I'm not a big user of the Detail slider but yes, if I ramp that up I see the difference between the two modules.
From my limited experimentation, though, I'd say that (on the photos I looked at) the Develop module was more accurate (to compare I edited in PS and then saved PSDs without changing anything). Anyways, as ssprengel and LR says, you should view at 1:1 to check out sharpening adjustments, anything else is an extrapolated version of the file anyway.
Yes, I can see it's not ideal that the two modules don't show even heavily processed the photos the same bit I can see why it works as it does.
Again, thanks for the replies. I shall have a look at the links, I was trying to achieve an industrial look so I followed directions from a photographer who uses LR to get this look. I was happy with the image in Develop but less so with the one in Library. So you think it's over use of sharpening etc?
Examining the screenshots, both the Fit-view and 1:1-view, the pupil (central black circle) of the left eye in the Fit-view preview is approximately 5 pixels wide, while the pupil in the 1:1-view is 50 pixels wide. So the preview is approximately 10 times smaller than the original image, and because this is area, there are 10x10=100 1:1-view pixels that are somehow combined to be one into one Fit-view pixel.
While a grainy-over-sharpened industrial look is fine, how can a preview where each of its pixels represents 100 original image pixels be accurate at the detail level either in Library or Develop? It can't. A reduced-size preview image is for judging treatments that affect each pixel similarly, toning, color adjustment, etc, but not things that might change how one pixel looks in relation to its neighboring pixels which is exactly what sharpening and noise-reduction do.
I think "over use" is a bit subjective....if it gives you the result you want then obviously not.
I think the key thing to remember is how the files will finally be viewed. If they're going to be viewed on a screen then you need to resize them to that screen size. otherwise LR (or whatever viewing program they're sitting in) is making its own guess as to how the pixels should look (as ssprengel explains far better than me). If ultimately you're going to print the files then I'm afraid you'll need to do some test prints. Sharpness on screen and print look very different indeed.
Experimentation is perhaps the key?
I shall try printing them to see the final image. Thanks for the help and reply.
Thanks very much for the help and the reply. The links were very useful.