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	<title>a look inside &#187; How-To</title>
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		<title>A little lighting mojo</title>
		<link>http://blog.ajmartinez.com/2011/04/21/a-little-lighting-mojo/</link>
		<comments>http://blog.ajmartinez.com/2011/04/21/a-little-lighting-mojo/#comments</comments>
		<pubDate>Thu, 21 Apr 2011 05:19:59 +0000</pubDate>
		<dc:creator>Anthony</dc:creator>
				<category><![CDATA[photography]]></category>
		<category><![CDATA[How-To]]></category>
		<category><![CDATA[Lighting 101]]></category>
		<category><![CDATA[Strobist]]></category>

		<guid isPermaLink="false">http://blog.ajmartinez.com/?p=1201</guid>
		<description><![CDATA[Gatorade and a few other sporting brands have taken to dramatic lighting in their ad campaigns for several years now. The number of times I&#8217;ve read questions about how to achieve such lighting answered simply with softbox has grown so large I&#8217;ve decided to go ahead and answer the question with an explanation I hope ]]></description>
			<content:encoded><![CDATA[<p>Gatorade and a few other sporting brands have taken to dramatic lighting in their ad campaigns for several years now. The number of times I&#8217;ve read questions about how to achieve such lighting answered simply with <em>softbox</em> has grown so large I&#8217;ve decided to go ahead and answer the question with an explanation I hope someone will find more useful than <em>softbox</em>.</p>
<p>First of all, you don&#8217;t need a softbox. Any spill-controlling light source you can get close to your subject will do. <a href="http://zackarias.com/blog/" target="_blank">Zach Arias</a> likes to use a collapsed bounce umbrella and a hotshoe flash like a small softbox. You can make a softbox out of a cardboard box lined with foil and covered with a white trashbag if you really want to. Do you have a large beauty dish with a diffuser? That will work too. Your options are only as limited as your imagination so long as you&#8217;ve got a means of providing a large apparent light source that controls spill and can be placed very close to your subject.</p>
<p>Why does the light source need to be close to your subject? If you take light intensity as a function of distance the value decreases rapidly as distance increases. Outside of my engineering courses I don&#8217;t know very many people who even remotely care about the science behind that fact, or the math used to describe it, so I won&#8217;t go there. If you want a quick practical example turn the lights off in your room and shine a flashlight at your hand, then shine it in the far corner of the room. It&#8217;s going to be significantly brighter against your hand. Your flashes emit light, and light is light. It all behaves the same way.</p>
<p>Now, let&#8217;s review some basics of flash photography. Aperture controls flash. Shutter speed controls ambient light. Shooting at your max sync speed (1/200s on my Canon 5D Mark II &#8211; ask Google if you don&#8217;t know your max sync speed) will kill the ambient light, leaving your flash to do all of the work. To make this work, go with a small aperture &#8211; say f/8 or smaller. Combine all of that with a light source very close to your subject and you&#8217;ll get light that goes from bright to dark in less distance than the width of my head.</p>
<p>Example #1 &#8211; ISO 250, 1/200s, f/8, 50mm, 2x Vivitar 285HV hotshoe flashes @ 1/4 power into collapsed Westcott 43&#8243; Soft Silver umbrellas:<br />
<div class="wp-caption aligncenter" style="width: 510px"><a href="http://www.flickr.com/photos/macktruckturner/5628080503/"><img alt="Ex1" src="http://farm6.static.flickr.com/5066/5628080503_f13c787958.jpg" title="Ex1" width="500" height="500" /></a><p class="wp-caption-text">Two Lights</p></div></p>
<p>Lighting Diagram for Example #1:<br />
<div class="wp-caption aligncenter" style="width: 482px"><a href="http://www.flickr.com/photos/macktruckturner/5638631201"><img alt="Lighting Diagram" src="http://farm6.static.flickr.com/5146/5638631201_f1fcb6c889.jpg" title="Lighting Diagram" width="472" height="500" /></a><p class="wp-caption-text">Lighting Diagram</p></div></p>
<p>Example #2 &#8211; ISO 100, 1/200s, f/8, 50mm, 1x Einstein 640 @ 1/96 power (-6.5f) into a 28&#8243; Fotodiox beauty dish with diffuser:<br />
<div class="wp-caption aligncenter" style="width: 510px"><a href="http://www.flickr.com/photos/macktruckturner/5633894994/"><img alt="Ex2" src="http://farm6.static.flickr.com/5262/5633894994_a387f286a4.jpg" title="Ex2" width="500" height="500" /></a><p class="wp-caption-text">Beauty Dish</p></div></p>
<p>Lighting Diagram for Example #2:<br />
<div class="wp-caption aligncenter" style="width: 482px"><a href="http://www.flickr.com/photos/macktruckturner/5638631213/"><img alt="Lighting Diagram" src="http://farm6.static.flickr.com/5190/5638631213_32ba705fdc.jpg" title="Lighting Diagram" width="472" height="500" /></a><p class="wp-caption-text">Lighting Diagram</p></div></p>
<p>There you have it. Get in close with a large apparent light source, shoot at your max sync with an appropriate aperture. If you want more light to spread across your subject open the aperture up, if you want it to spread less close it down. Alternately, you can control how far the light travels across your subject by varying the power of your strobe. For reference sake, you don&#8217;t need a huge room with black walls to do this. Both shots above were taken in normal bedrooms. The first was taken during the day with a window open, and I forgot to reduce the ISO from the product photos I took moments earlier. Post-processing was limited to a preset that simulates Kodak Tri-X black and white film. Honestly, the preset overdrives the highlights far more than it kills the shadows. Control the spill, and get in close &#8211; you can get this effect nearly anywhere.</p>
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		<title>American Amber Ale</title>
		<link>http://blog.ajmartinez.com/2010/01/31/american-amber-ale/</link>
		<comments>http://blog.ajmartinez.com/2010/01/31/american-amber-ale/#comments</comments>
		<pubDate>Sun, 31 Jan 2010 22:50:15 +0000</pubDate>
		<dc:creator>Anthony</dc:creator>
				<category><![CDATA[Beer]]></category>
		<category><![CDATA[photography]]></category>
		<category><![CDATA[DeFalco's]]></category>
		<category><![CDATA[Extract brewing]]></category>
		<category><![CDATA[Homebrew]]></category>
		<category><![CDATA[How-To]]></category>

		<guid isPermaLink="false">http://blog.ajmartinez.com/?p=742</guid>
		<description><![CDATA[Now that I have all of the supplies required to brew 5 gallon batches of beer, and have convinced myself I can follow directions well enough to end up with a drinkable beer, it is time to get started. A trip down to DeFalco&#8217;s got me the ingredients I need for my first partial mash ]]></description>
			<content:encoded><![CDATA[<p>Now that I have all of the supplies required to brew 5 gallon batches of beer, and have convinced myself I can follow directions well enough to end up with a drinkable beer, it is time to get started. A trip down to <a href="http://defalcos.com" target="_blank">DeFalco&#8217;s</a> got me the ingredients I need for my first partial mash beer. Since I like amber ales, I decided that is what I would brew as my  5 gallon brew.</p>
<h3>The Ingredients</h3>
<p><a href="http://defalcos.com" target="_blank">DeFalco&#8217;s</a> happens to have a recipe for that very thing, so here&#8217;s the ingredients list for my second homebrew:</p>
<ul>
<li>6 pounds light malt extract</li>
<li>1.5 pounds pale malt</li>
<li>1 pound medium crystal malt</li>
<li>1 ounce Mt. Hood hops (bittering)</li>
<li>.5 ounce Cascades hops (flavoring)</li>
<li>.5 ounce Cascades hops (finishing)</li>
<li>1 package Burton water salts</li>
<li>1 vial White Labs California yeast</li>
<li>1 package Bru-Vigor (yeast food)</li>
<li>.75 cup corn sugar (priming)</li>
</ul>
<h3>The Process</h3>
<p>The first step to any successful endeavor is planning. For brewing, make sure you have all the equipment you will need. If you are using gas, as I am, make sure you have full tanks of propane ready to go. Few things would be less awesome than running out of gas before you hit your boil, or during the boil. Do you have your thermometer(s), hydrometer, a large stirring spoon, an appropriate brew kettle/stock pot, enough water you can actually use? What about a wort chiller (or some means of cooling 5gal of wort from boiling to yeast-pitching temperature as rapidly as possible)? Do you have the lid or stopper for your primary fermentation vessel? What about an airlock? Do you have a fluid you can put in your airlock that will reduce the risk of infection? Are all of your ingredients accounted for? A checklist is useful, and <a href="http://www.brewersfriend.com/" target="_blank">Brewer&#8217;s Friend</a> happens to have several of them already made up (wish I&#8217;d known that before I made my own)! Anyway, if you answered yes to everything you&#8217;re ready to start brewing. </p>
<div class="wp-caption aligncenter" style="width: 510px"><a href="http://www.flickr.com/photos/macktruckturner/4317129248/" title="Brewing Supplies by Anthony J. Martinez, on Flickr"><img src="http://farm5.static.flickr.com/4068/4317129248_2aa9a68766.jpg" width="500" height="333" alt="Brewing Supplies" /></a><p class="wp-caption-text">Brewing supplies</p></div>
<p>To start, clean and sanitize everything. Yes, everything. Sure, much of what you will be using are going to contact boiling water sooner than later but you won&#8217;t hurt anything by sanitizing it first. I use a light, fragrance-free, detergent and a 3M sponge/scrubbie to physically clean everything to a smooth and grit-free surface. Rinse, dry, and coat in a mist of 12.5ppm Iodophor solution. It stays like that until use.</p>
<p>Knowing I would need to heat water for steeping my specialty grains and water with which to rinse said grains, I split my water between two kettles. I would steep and sparge in my main brew kettle, a 42 quart stock pot, and use another pot to heat my sparge water. My brew kettle was filled with 3.5 gallons of spring water, to which a packet of Burton water salts was added, and brought up to ~165°F. At the same time, my sparge water was warmed to ~150°F to rinse the grains after 30 minutes of steeping.</p>
<p>Steeping was pretty easy, and rewarding. The clear water turned a deep amber very quickly, and released a great malty aroma. To make sure all of the grain was exposed to the hot water, I continuously bobbed the grain bag in the brew kettle. As soon as the bag hit the water, I started the stopwatch on my iPhone &#8211; at least my iPhone does something correctly. When 30 minutes elapsed, I pulled the grain bag from the water and rinsed it with the sparge water I had heating in the house.</p>
<div class="wp-caption aligncenter" style="width: 510px"><a href="http://www.flickr.com/photos/macktruckturner/4317130192/" title="Steeping Specialty Grains by Anthony J. Martinez, on Flickr"><img src="http://farm5.static.flickr.com/4066/4317130192_63a6131ecb.jpg" width="500" height="333" alt="Steeping Specialty Grains" /></a><p class="wp-caption-text">Steeping speciality grains</p></div>
<p>At this point, my brew kettle now had 6 gallons of wort from the specialty grains ready to bring to a boil and have 6 pounds of light malt extract stirred in. The jet burner made quick work of bringing the 6 gallons from ~160°F to a rolling boil. It also dropped the pressure in my propane tank so fast the outside of the tank frosted over. That was pretty cool, literally. When the boil hit I cut back the heat, to avoid scorching, and stirred in the light malt extract. </p>
<p>With the wort as full of sugars and proteins as it was going to get, I went back to full heat on the burner until the hot break. A foam formed over the surface of the wort, and then sunk back in. You could see the hot break particles moving about as solids in the wort. This was my cue to add 1 ounce of Mt. Hood bittering hops, and hit the lap button on the stopwatch. 30 minutes later, I added .5 ounce of Cascade hops for flavor, and 15 minutes after that I added the remaining .5 ounce of Cascade hops to finish for the final 15 minutes of the boil.</p>
<div class="wp-caption aligncenter" style="width: 510px"><a href="http://www.flickr.com/photos/macktruckturner/4316397297/" title="Final hop addition by Anthony J. Martinez, on Flickr"><img src="http://farm3.static.flickr.com/2741/4316397297_f7d57131bc.jpg" width="500" height="333" alt="Final hop addition" /></a><p class="wp-caption-text">Final hop addition</p></div>
<p>At the end of the 1 hour of boiling past my first hop addition, I cut the flame and immediately moved the brew kettle to my wort chiller to start cooling. Stirring the wort while the chiller was running made the temperature drop <strong>much</strong> faster than just letting the cooler run on its own. It only took about 15 minutes to drop the wort from more than 210°F to ~80°F. This could be done even faster if I also had a pre-chiller to drop the water flowing through the immersion chiller down closer to freezing.</p>
<div class="wp-caption aligncenter" style="width: 510px"><a href="http://www.flickr.com/photos/macktruckturner/4316397425/" title="Cooling the wort by Anthony J. Martinez, on Flickr"><img src="http://farm5.static.flickr.com/4014/4316397425_145d46929a.jpg" width="500" height="333" alt="Cooling the wort" /></a><p class="wp-caption-text">Cooling the wort</p></div>
<p>With the wort cooled sufficiently, I took sample and found its gravity using my hydrometer. I also took the temperature so I could correct the hydrometer reading. My target original gravity was 1.050, per the recipe, and my actual original gravity (temperature corrected) is 1.055. Final gravity should be 1.012 when all is said and done. The California yeast is a high attenuation yeast, so it should be able to bring the gravity from 1.055 down to 1.012 without trouble.</p>
<p>The cooled wort was poured into my 6.5 gallon primary fermentation bucket. I splashed it around as much as possible for aeration, but took care to minimize the disturbance of the sediments that fell out of solution during the cooling phase. Another temperature reading verified that my wort was well within the pitching range for the White Labs California yeast, so the vial was shaken and poured into the wort along with the packet of yeast nutrient. I snapped the lid down securely, agitated some more, and put in my airlock.</p>
<p>Everything I&#8217;ve read places fermentation temperature control up near the top of the list of things one must have for consistently good beers. My first brew likely suffered some due to 10°F temperature swings in my closet from the heat of the day to the cold of night. Fortunately our house has a very central closet that maintains a very stable temperature day and night. My fermenter, wrapped in towels and topped with a thermometer, found its way to this closet. Some 20 hours later the airlock was bubbling like crazy. A good sign for sure.</p>
<div class="wp-caption aligncenter" style="width: 343px"><a href="http://www.flickr.com/photos/macktruckturner/4317130752/" title="In the fermenter by Anthony J. Martinez, on Flickr"><img src="http://farm5.static.flickr.com/4024/4317130752_b60ba48ea9.jpg" width="333" height="500" alt="In the fermenter" /></a><p class="wp-caption-text">In the fermenter</p></div>
<p>In a few days, when the bubbles slow in my airlock, I will take a sample of my beer and make another gravity reading. Should this reading be 30% lower than my original gravity, I will prepare to rack into my 5 gallon glass carboy for secondary fermentation to clear the beer more before bottling. When the time comes, I will clean and sanitize my bottling bucket and rack from my secondary fermenter onto a priming solution (.75 cups dextrose in 2 cups of water, boiled and cooled) in the sanitized bottling bucket. Unlike my transfer to my primary fermenter, I will seek to minimize any splashing as much as possible to avoid oxidation problems in my beer later down the line. The majority of this beer will go into standard 12 fluid ounce glass bottles, though I intend to bottle some of the brew into larger containers I can bring with me to share with friends.</p>
<p>Update:</p>
<p>In just four short days this beer fermented down all the way to a temperature-corrected 1.009, so I went ahead and racked to secondary. The beer will sit there for a few weeks, and hopefully get super clear for me when I bottle. At any rate, I am looking forward to drinking this one. The sample I took my gravity reading from tasted great.</p>
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