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May31-B - 09A_2344_Pyrethrum.jpg
Pyrethrum Flower
When I bought these seeds, they were sold as "Pyrethrum; painted daisy", although I think it may be arguable what they really are. Some plants have these magenta flowers, and some have pink. The real point here is that I was experimenting with a screw-on close-up lens. For macro shots I have long used and liked extension tubes on a 50mm f1.4 lens that I have, but I read that the close-up lens worked better on longer focal lengths, and allowed for a longer "working distance" between the subject and the front of the lens. When I use ET on the 50mm, the glass has to be within a couple of inches of the subject to get something like this (and often casts a shadow), but the base lens here was at 200mm at its closest focus distance of a couple of feet. One of the "tricks" for any kind of macro work is to use a very small lens opening to maximize DoF. Any kind of macro system, even a specialty lens, produces extremely narrow DoF and to be useful, you need that small aperture. The small opening means lots of light and/or slow speeds, so a flash is often needed, but with full sun in this case, it was without flash. This is un-cropped from my 1.3x sensor. Canon 1DmkIII; EF70-200mm f2.8L IS + Canon 500D close-up filter; 200mm; ISO-200; f16; 1/200-sec. |
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May31-B - 09A_2344_Pyrethrum.jpg
Hi there John, I googled pyrethrum & came up with Chrysanthemum
cinerariaefolium I have a plant spray that contains a % of pyrethrum, that I use on my orchids. Anyhow, more importantly, I love your closeup & have some questions re lenses etc. Is your email addy authentic? Cheers Wendy "John - Pa." wrote in message ... Pyrethrum Flower When I bought these seeds, they were sold as "Pyrethrum; painted daisy", although I think it may be arguable what they really are. Some plants have these magenta flowers, and some have pink. The real point here is that I was experimenting with a screw-on close-up lens. For macro shots I have long used and liked extension tubes on a 50mm f1.4 lens that I have, but I read that the close-up lens worked better on longer focal lengths, and allowed for a longer "working distance" between the subject and the front of the lens. When I use ET on the 50mm, the glass has to be within a couple of inches of the subject to get something like this (and often casts a shadow), but the base lens here was at 200mm at its closest focus distance of a couple of feet. One of the "tricks" for any kind of macro work is to use a very small lens opening to maximize DoF. Any kind of macro system, even a specialty lens, produces extremely narrow DoF and to be useful, you need that small aperture. The small opening means lots of light and/or slow speeds, so a flash is often needed, but with full sun in this case, it was without flash. This is un-cropped from my 1.3x sensor. Canon 1DmkIII; EF70-200mm f2.8L IS + Canon 500D close-up filter; 200mm; ISO-200; f16; 1/200-sec. |
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