Main differences and features between LR 3 and 4 ?

Last vesion of lightroom I used was 3.5, haven't been using it for a couple months, got a new computer and now have lightroom 4. Just trying to get adjusted to it.

I know its been probably discussed but can't really find any conversations on it. I'm just trying to figure out the main differences in the editing between the two versions?

The biggest one I can notice is the clairity adjustment is a lot more drastic, but I find it pretty helpful. Anything else? I know the layout is a bit different but everything seems the same ?

Lots of posts about LR4 here on the forum.

The biggest difference I've seen is the process going to 2012. It makes some very obvious slider changes through the Develop process.

Also Book module and Map module have been added along with Softproofing. A monitor compensation function in the Print module is also new.

Just a few of many changes I've seen from LR3.6.

Check out - http://tv.adobe.com …whats-new-in-lightroom-4/

Hmm, the forum search function must be broken. Here are a couple that a search would have turned up:
https://photography-on-the.net …/showthread.php​?t=1166275

https://photography-on-the.net …/showthread.php​?t=1170854
Post #9.

The main difference between the Lightrooms are the process 2010 - 2012.

They updated/changed the formula and math behind it. Giving you better control over the highlights and shadows. Ultimately giving you better photo's.

As already mentions the Book and Map modules are new. I personally can live without the Map module, but the Book module has lots of potential.

Another resource that I don't think people use a lot of are podcasts on iTunes. There are loads of short vid's that are worth watching and talk you through the software.

2012 process version is superior to the 2010 process version. Download LR4 and give it a spin.

I downloaded the trial LR4 when it was in beta and was disappointed by its sluggishness (on an i7-2600). I've been debating whether to buy the upgrade but will probably wait until they iron that out. I've seen comparison photos between LR3 and LR4 and while LR4 does a better job recovering highlights, it wasn't immediately apparent to me until I stared at both photos for a while.

I hear your concerns about sluggishness. The LR 4 beta never worked for me. I endend up with quite a long email exchange, over several weeks, with Julie Kmoch, one of the Adobe managers for LR. The thing would crash, seeming to hang when loading previews, whenever I performed certain edits, or eventually no matter what I did.

This was on a computer that had no problems with CS5, LR 3.6, Photomatix, etc. It was 32-bit Windows 7 with 4 gigs and dual processors. Out of frustration I decided that it was time to boost the machine and upgraded to 64-bit and 12 gigs. No problems since then, and everything runs more quickly and smoothly.

Adobe never did figure out what was going on, since the original configuration was well within the specs for LR4. However, LR4 is a considerably larger program on the HD, and it seems to be more resource hungry.

pknight wrote in post #14243624
This was on a computer that had no problems with CS5, LR 3.6, Photomatix, etc. It was 32-bit Windows 7 with 4 gigs and dual processors. Out of frustration I decided that it was time to boost the machine and upgraded to 64-bit and 12 gigs. No problems since then, and everything runs more quickly and smoothly.

Same here, I got a desktop computer after upgrading my Core2duo laptop to LR4 and was constantly frustrated. I now have an i7 desktop with 12GB ram, and I am LOVING EVERYTHING!

The LR 4.1 Release Candidate patch update has solved the sluggishness issues that I was having on my six-core, Win7 64-bit, 16gigs of RAM, and dual monitors. Even with that monster of a system the initial install of LR4 had major slowdown issues, and resource hogging. With 4.1 it's definitely better.

aepoc wrote in post #14246421
The LR 4.1 Release Candidate patch update has solved the sluggishness issues that I was having on my six-core, Win7 64-bit, 16gigs of RAM, and dual monitors. Even with that monster of a system the initial install of LR4 had major slowdown issues, and resource hogging. With 4.1 it's definitely better.

I am not using the RC. I am using LR4.0. I have dual monitors as well. This is a fresh install though, and I bumped up the cache size to something like 12GB. I do not know what else is different from you.

professorman wrote in post #14246469
I am not using the RC. I am using LR4.0. I have dual monitors as well. This is a fresh install though, and I bumped up the cache size to something like 12GB. I do not know what else is different from you.

Very interesting indeed. I'll have to double-check my cache... I think I may have mine set to 10.

aepoc wrote in post #14252382
Very interesting indeed. I'll have to double-check my cache... I think I may have mine set to 10.

I would recommend at least 30 GB for the ACR cache.