>> All that really matters for display on a computer screen is the number of >> pixels UNLESS you're using a page layout app that understands the density >> and renders it. I set my web resolution JPEGs to 72ppi out of habit, but it >> doesn't matter at all for a browser's display of a photograph. > > Strikes me as probably an interesting comment, but, novice that I am, I need > explanation.
Not sure how much simpler I can make it. When exporting a photo for use on the web, don't worry about the density or dpi setting at all. Put any number you like in there. 72 is the de facto standard, it is usually ignored by most image display software. What's important is how many pixels are in the exported image, that's all. Lightroom allows you to set the export pixel sizing in several ways. Setting the long edge to a maximum number is what most people use ... if you set, 1000 pixels on the long edge and the photo is a 2:3 proportion, it will set the short edge to 667 pixels. Generally speaking, JPEGs being exported for web use these days should be around 1000-1200 pixels on the long edge and set to about 75 on the quality/compression scale for a good presentation. This makes reasonably sized images that look good on a large display and don't completely overwhelm most smaller displays. They upload and download reasonably quickly for most users when a browser displays them. (The density setting in the export panel is important when setting the export dimension in inches or other units for printing purposes. Then, Lightroom calculates the size in pixels required to make a print that dimension at the specified density.) >> My output sizing for the web is similar to Cotty's ... up to 1200 pixels on >> the long edge for most photos these days. Sizes have gone up as displays >> have gotten larger and fast internet is more ubiquitous now. > > Recently, I shared a set of photos taken at a candidates forum with the > organizers and invited them to use them however they would like, if they > would like. If I were to---I am going to!---start uploading smaller files, > might I in that situation invite people to request larger images if they > would be more suitable? If you post the afore-mentioned 1000x667 sized images, and your clients/friends/etc want to make a high quality print, you'll need to supply them with larger files on request for that purpose. For a quality print, 240 ppi is about the minimum I like to send to a printer, and for 1000x667 pixel images, that's a print size of about 4x2.75 inches. To make an 8x12 print at 240 ppi, you need 1920x2880 pixels in the source image. Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
