uncleflo

profile picture

Some cool dude. Higher order of decision making. Absolute.

Registered since September 28th, 2017

Has a total of 3360 bookmarks.

Showing top Tags within 6 bookmarks

development   information   howto   guide   reference   administration   website   software   design   solution   linux   business   service   web   code   server   online   uk   tool   application   system   blog   list   data   description   tutorial   security   article   video   technology   windows   explanation   company   world   download   free   product   javascript   network   project   lookup   experience   london   performance   file   library   research   tools   php   programming   opensource   html   control   support   example   beautiful   community   technical   create   music   learn   computer   image   dance   share   webdesign   browser   mobile   build   database   internet   user   feature   platform   hardware   css   3d   money   quality   work   install   event   camera   search   standard   travel   access   management   manage   course   phone   source   script   client   api   test   marketing   story   google   digital   review   developer   fast   communication   simple   question   interface   usa   documentation   photography   idea   program   study   startup   app   device   advice   content   process   account   professional   cheap   youtube   media   monitor   setup   live   profile   market   resource   flash   ubuntu   analysis   industry   installation   develop   social   js   speed   inspiration   university   graphics   command   package   customer   photo   framework   page   open   science  


Tag selected: optical.

Clear all

Showing 6 results.

Looking up optical tag. Showing 6 results. Clear

How to Test Your Lens | B&H Explora

https://www.bhphotovideo.com/explora/photography/tips-and-solutions/how-to-test-your-lens

Saved by uncleflo on January 6th, 2019.

So, you just bought a shiny, new, and maybe expensive, lens for your camera, and being the savvy consumer, you did your homework. You pored over customer reviews on the B&H Photo website, read online reviews splattered all over the Internet, grabbed a copy of every photo magazine that reviewed the lens, bookmarked dozens of websites, and now have the lens’s MTF curve charts burned into your retinas. Now, your lens is here and it is time to go out shooting. Honestly, not a problem. Your lens should be as good as it can be and, as photographers, we want to take photos. So, stop reading and go out and make some photographs! Still here? OK, let me tell you why you might want to test that lens yourself. The main reason is that even with today's precision computer-controlled manufacturing techniques, there are variations in each and every lens that rolls off an assembly line. This means that some examples will be better than others. Some lenses will be outstanding and others will make you wonder if all of those glowing reviews you read online were completely bogus.

handhold sharpness lens tripod magnify zoom sharper focal aperture methodical optically optical test try technical review discussion howto photo photography camera photographer tester administration workflow consumer website approach


Lens Tests: A Simple Method

http://www.zen20934.zen.co.uk/photography/LensTests/simplemethod.htm

Saved by uncleflo on January 6th, 2019.

This is a simplified subjective method of testing lenses optical sharpness. This should not be confused with tests for focus accuracy and discrimination in a 3D environment, that is a totally different issue although often confused by the inexperienced. A focus accuracy test is suggested here Focus Test. The advantage over this method, compared to just taking a shot of a garden etc, is elimination of variables such as subject and camera movement, insufficient depth of field, flatness of field and variations in focus location. It uses a nice consistent high contrast subject to make comparisons easy; checking sharpness on general photographic views is not very easy. As the method is subjective, it is worth testing against a known good lens for comparison.

sharpness histogram sharpen broadsheet flatness clipping lens stabilizer timer infinity check focal pixel recommend exposure adjust compensate focus filter optical hardware camera comparison accuracy precise precision photo photography test testing environment confuse compare equipment standard quality


ISO 12233 Test Chart

https://stephen-westin.com/misc/res-chart.html

Saved by uncleflo on January 6th, 2019.

In 2000, the International Standards Organization adopted ISO Standard 12233: Photography -- Electronic still-picture cameras - Resolution measurements for the measurement of camera resolution. This standard is protected by copyright, but the design of the associated test chart seems not to be protected; its description has been available on the Web in an Excel spreadsheet. I have semi-manually converted this to an Adobe Illustrator file which is displayed here. In 2014 and again in 2017, the ISO revised the standard and the chart below was replaced by several new ones. Those new charts are not available here. In principle, you should be able to print this chart and perform resolution tests on your camera. The reality isn't that simple; there are lots of subtleties having to do with focus distance, quality and contrast of your printer, evenness of illumination, surface reflections, etc.

print raster spreadsheet pixel reproduce resolution imaging squares illustrator computational outline optical cheap precision expect compliance chart measurement measuring properly file camera perform assessment standard resource howto test testing photographer performance analysis distortion revise focus


Canon EF 28-300mm f/3.5-5.6L IS USM Lens

http://www.bhphotovideo.com/c/product/319784-USA/Canon_9322A002AA_28_300mm_f_3_5_5_6L_IS_USM.html

Saved by uncleflo on July 23rd, 2016.

The EF 28-300mm f/3.5-5.6L IS USM Lens from Canon is an all-in-one zoom lens for versatile and easy subject selection for multiple photographic applications. This lens offers the highest optical performance in its class, plus the convenience of focusing as close as 2.3 feet over the entire zooming range.

canon camera photography lens 300 200 focus series aperture range optical image stabilization accessory stabilizer subject manual offer specification photographer water wildlife zoom telephoto angle


Diamond Properties

http://www.chm.bris.ac.uk/motm/diamond/diamprop.htm

Saved by uncleflo on April 4th, 2015.

Choose virtually any characteristic of a material - electronic, structural, or optical - and the value associated with diamond will almost always be the most extreme: Diamond is invariably 'the biggest and the best'. The following is a table of the properties of diamond that render it so potentially useful across many fields of science (Ref. 'Synthetic Diamond - Emerging CVD Science and Technology', Spear and Dismukes, Wiley, NY, 1994).

useful properties science diamond material structural extreme characteristic optical list reference


The Truthful Mouse Guide

http://www.overclock.net/t/951894/the-truthful-mouse-guide

Saved by uncleflo on May 16th, 2013.

I know that there is a CS:S Mouse Optimization Guide already stickied in the forum but I decided to make my own mouse guide because I felt that there were simply a few things left unsaid/misunderstood.

truth mouse guide hardware pc computer game response mat laser optical wired wireless acceleration best good information test control


No further bookmarks found.