LR_HowTo, LR_Reference, Why, LR2, LR3

What's Wrong with Lightroom and IPTC

IPTC means International Press Telecommunication Council. It's a set of standards for the news organizations to file, archive and manage news data. There are many standards depending on the type of data, from photos and video to sound… Lightroom proclaims proudly that it supports the IPTC standard and even supports the new extended IPTC.

  • Please note that the IPTC is very different from the keywords. The IPTC information is the title, description, copyrights, location…
  • The new, extended IPTC that came out just 3 years ago includes model information, location, artwork, model and property releases…

300 DPI vs 72 DPI

  1. DPI stands for "Dots Per Inch". DPI only applies to output devices, that's for monitors and printers…
  2. PPI stands for "Pixels Per Inch". PPI only applies to input sensors, that's for camera sensors…

If somebody talks about PPI when talking about screens or printers, they don't know what they are talking about! Many printers do not deal in DPI but in LPI "Lines Per Inch", those are mostly CMYK commercial printers, printing presses, magazines, newspapers…

What's the difference between a 300 DPI and a 72 DPI? None, zero, zilch!

Rendering Previews in Lightroom

Previews are controversial, somebody will tell you that you should render them 1:1 on import of the photos. Somebody else will tell you that you shouldn't generate the 1:1 previews.

  1. There is NO correct answer.
  2. It's a preference.
  3. No matter what you decide, Lightroom needs the 1:1 previews. You will have to pay the piper, the question is when. Will you pay at the front-end or at the back-end?

Lightroom Speed Tip and the Raw Cache

Lightroom and Photoshop use the same ACR, Adobe Camera Raw module, to process the photos in the Develop module. The difference between Lightroom and Photoshop is that the ACR is built-in Lightroom, while in Photoshop it's a stand alone application.

When the Develop module reads a photo for the first time, Lightroom renders the photo as a full 1:1 preview and adds that photo to the Camera Raw Cache. So the next time it will not have to render that photo again, instead it will read the photo from the disk. The problem is that there is only so much cache.

How To Remove EXIF Data in Lightroom

When I export photos, often I don't want to show all of information, camera, lens, EV settings... Lightroom allows me remove all the EXIF data from my photos. But... There's one thing that I always want exported: my copyright information.

Lightroom has 4 different export format options:

  1. JPEG
  2. PSD
  3. TIFF
  4. DNG (digital negative)

Selecting Minimize Embedded Metadata will remove all of the metadata, the EXIF data, the IPTC data, and all of the extra info.

Lightroom: Stacking Photos

Lately, I've experimenting with panoramas. The simplest and cheapest way is get a wide angle, not a wide-angle but a really-really wide angle, take the photo, crop and trim, and end-up with a photo that is 200 or 300 pixels tall.

I've been using a panorama head, the Panosaurus. I make between 3 to 7 photos and merge them together in Photoshop.

The multiple photos don't have much value in themselves, they are just the intermediary steps for the final photos, but I want to keep them together. The Lightroom solution is: stacking.

Lightroom: Secrets of Integrating Properly with Photoshop

Lightroom is designed by Adobe be the front end to Photoshop, but many people have lot of problems because Adobe hasn't explained clearly how Lightroom and PhotoShop talk to each other.

Secret #1

The Lightroom version must match exactly the Camera Raw version of Photoshop.

  1. Lightroom includes its own version of Camera Raw. Lightroom doesn't use Photoshop's Camera Raw. Lightroom is a non-destructive editing program.

Lightroom: SSD vs Hard Drives

Some people are buying SSD, Solid State Drives, to speed up their Lightroom and their various disk operations.

SSD started in 1978 at Texas Instrument with the first SSD drive: 16kb. Yes, 16 kilobytes and that's when the hard drives' size were 1Mb and 5Mb. The single largest user for SSD is the military for their laptops. SSD is more shock resistant, but more importantly, with the push of a 3 finger combination the laptop can be erased instantly to prevent the “enemy” from getting the data. You can't do that with a hard drive.

So back to the speed.

Removing Photos From Catalogue Instead of Deleting Them

Pressing the Delete key in Lightroom will either:

  1. Delete a photo from the All Photographs
  2. Remove a photo from the current catalog
  3. Remove a photo from the current collection

When I press the Delete key in Lightroom on a photo and I'm in the All Photographs, Lightroom comes up with the following screen:

Lightroom to Photoshop and Back

  • Lightroom is a Digital Asset Management (DAM) program with an image editor. In Lightroom I apply settings to the whole photo, exposure… (yes I know about the local adjustments.)
  • Photoshop is a pixel editor. I use it to do whatever I want with the image including layers, pixels… You don't even need an image to start with in Photoshop, hundreds of designers built their own graphics/images.

Lightroom can pass the photos to Photoshop. Photoshop can return the layered Photoshop PSD file to Lightroom and Lightroom will see the changes.

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