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April 28 rapeseed fieldShoot today. Not much cloud, slightly overcast. I use polarize filter to darken the sky which saves later time and effort to fiddle Photoshop to “recreate” sky. Only use Canon Digital Professional to 1) reduce brightness (-0.17) 2) switch to 'Landscape' picture style 3) little tweak on tone curve. This picture reminds me U2's 'Running to Standstill" Camera: Canon EOS 5D Exposure: 0.008 sec (1/125) Aperture: f/10 Focal Length: 50 mm ISO Speed: 200 Exposure Bias: 0 EV Flash: Flash did not fire April 22 Macro (Closeup) Photography 0.005sec (1/200); f/13; Focal Length:105 mm; ISO Speed:640;Exposure Bias:0 EV;Flash fired; using 12 and 20mm extension tube Received Kenko extension tube set this week. Today I have a play with it.
My favourite subject is ladybird. Though very small, it is a very beautiful beetle with bright red shell doted. The size–about 5-7mm-presents a serious challenge. Back earlier April, I used Macro function comes with the lenses on Macro photography, which can be manually focus (with moving camera back and forth) at around 0.45m distance. The finished shoots after crop, zoom and interpolation become blur at edges. This is understandable-the finished photo I used as desktop is actually 4 times the life size by digital up scaling.  0.005sec (1/200); f/9; Focal Length:105 mm; ISO Speed:100;Exposure Bias:0 EV;Flash No; Using Macro function It must be optical enlarge to solve the problem properly. There are few solutions around, such like use reverse ring to mount a 50mm lenses reversely. Use a bellow or an extension tube. Each solution has its pros and corns.
Reverse ring is the cheapest solution; you can pick up one from eBay for around 5 pounds including postage from China. It exposed the lenses inside out, could be a hazardous. And of course you lost TTL metering and auto focus. Bellow is the most flexible but quite bulky. It takes a platform with ruler and guiding rails. I feel it is not the best choose for field shooting. I saw one on eBay going for £160 with a compliment 50mm FD lenses. A new one without lenses shipped from China costs about 30 pounds includes p&p. That leaves candidate extension tube. By mounting it ( or combine a few and) to camera body, then mount lenses to it, you have the balance of flexibility, portable and lenses protection.  shown with 12, 20 and 36mm extension tube mounted Anyway I am quite excited to have a new gadget under my belt.
Global warming speeds up this Spring. Back three weeks ago there are a lot of ladybirds around our garden, now they all seemed go away. So it is very lucky I found a fella basking sun in the grass. First I mounted a 25mm tube and set our little friend to tulip leave. Didn’t use flash as the sunlight was still very strong. Auto-focus is usable, but not very useful as the field of depth is very shallow regardless aperture: a little motion from the subject will mean refocusing. And the auto focusing is just not fast enough to cope. The strong wind didn’t help neither. With the enlarge effect from the tube, it renders subject violently movement. After a few attempts, I retreated. I took my little model with the stem he is resting on and set the shooting studio. I use flash mounted with diffuser. First I try 25mm, then 25mm plus 12mm and finally 25mm plus 12mm plus 36mm. At the beginning and didn’t bother to set up tripod, thinking with speed at 1/200 and image stabiliser, it should be alright without – I was wrong, later I checked the photos and found there are some compromised on quality. As all three tubes mounted, the exposure factor increased to 6.1 for a 50mm lenses. I zoomed to around 100mm so the shake from the hands were even apparent. So a tripod is unavoidable. Also found Cannon 5D handles high ISO noise quite well. With noise reduction switch on, it only becomes visibly grainy at 1000 or above.
 0.005sec (1/320); f/9; Focal Length:105 mm; ISO Speed:400; Exposure Bias:-1EV;Flash No; Using 20mm extension tube  0.005sec (1/320); f/9; Focal Length:105 mm; ISO Speed:400; Exposure Bias:-1EV;Flash No; Using 12, 20 and 36mm extension tube April 06 色情郁金香
花园里的郁金香开了一大片。忍不住手又去拍了几张。 母亲带回国几棵球茎。每天精心护理，可在南方亚热带气候下连芽都没发就香飞魂 散了。我这次是圣诞节前种的，没怎么打理却纷纷开了。一方土养一方花阿。 后期加工了一下，成了油画效果。颜色艳得有色情嫌疑。 发自Flickr |
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