{"id":9231,"date":"2016-08-14T04:00:41","date_gmt":"2016-08-14T09:00:41","guid":{"rendered":"http:\/\/tkahler.com\/blog\/?p=9231"},"modified":"2023-04-06T19:45:52","modified_gmt":"2023-04-07T00:45:52","slug":"rock-rose","status":"publish","type":"post","link":"https:\/\/tkahler.com\/blog\/2016\/08\/rock-rose\/","title":{"rendered":"Rock Rose"},"content":{"rendered":"

There is a Rock Rose bush in the back yard and all the flowers had wilted\u00a0with the summer heat. I looked\u00a0earlier this week\u00a0and saw that the bush was filled with flowers once again. So, I went out yesterday morning to photograph one of them. I used the focus-stacking technique\u00a0as I did with the other flowers that I posted last week. The only difference in this one is that I used my\u00a0manual focus rail instead of turning the focus ring on the lens.\u00a0Using a manual focus rail delivers better results but it requires some mathematical calculations to obtain the desired outcome. Using the focus ring is a trial-and-error approach.<\/p>\n

Like other macro photographers, I developed a macro focus rail spreadsheet which helps me calculate the number of focus rail knob turns per image and how many images to take. In order to calculate all of this I need to know the lens focal\u00a0length, aperture setting, sensor type, distance to subject, the depth of the subject, and the distance the rail travels per knob turn. Armed with this information I can obtain the necessary data to capture the image. I’m happy to send you the spreadsheet. Just drop me a note<\/a> and I’ll forward it via email.<\/p>\n

\"Rock<\/a>
Rock Rose<\/figcaption><\/figure>\n

This image was taken with my\u00a0Canon EOS 5DS<\/a>\u00a0using my\u00a0Canon EF 100mm f\/2.8 Macro Lens<\/a>. The camera was set on Aperture Priority\u00a0with the aperture set at f\/8, shutter speed at 1\/30th of a second and the ISO set at 400. I did not use a flash to light the subject. I used the Kirk FR-2 Focusing Rail<\/a> to capture the 20 images, I brought\u00a0them together using Zerene Stacker. I then used Lightroom, Photoshop and Nik Color Efex Pro to finalize the image.<\/p>\n

This image is best viewed large. Clock on the image to enlarge it. Also, you can access the profile for this flower by clicking\u00a0here<\/a>. Please use the section below to post your comments, questions or\u00a0suggestions.<\/p>\n

\"T.
\n<\/a>\u00a9 2016 T. Kahler Photography<\/p>\n","protected":false},"excerpt":{"rendered":"

I captured this image of a Rock Rose using the focus stacking technique. 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