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Old Feb 6, 2007, 10:34 PM   #1
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Caught my Son watching a movie the other day. The sun was shining in just enought to light up his eyes. Taken around f4.5 and iso 400.

Going to throw in a couple flower macros just for kicks. Really did I say really need a tripod with this lens when your getting anywhere near that 1:1 ratio. Really amazing for portraits too!

Thanks for looking,

Fred











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Old Feb 6, 2007, 11:16 PM   #2
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Lovely photos - that lens is really working out well for you. Did you handhold the second flower?
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Old Feb 7, 2007, 12:27 AM   #3
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Awesome bird of paradise flower. Sharp and great color vibrance.
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Old Feb 7, 2007, 7:12 AM   #4
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oo, I like the 2nd one a lot
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Old Feb 7, 2007, 7:40 AM   #5
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mtngal wrote:
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Lovely photos - that lens is really working out well for you.* Did you handhold the second flower?
Thanks mtngal,

The second flower shot was definately not handheld. The first on is though. Funny story I went to a horticultural center over in Phialdelphia, only to realize I forgot my tripod. Not much color there this time of year anyway. Without shake reduction and trying to get a 1:1 shot forget about it.

Fred
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Old Feb 7, 2007, 7:55 AM   #6
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Fred2726 wrote:
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...trying to get a 1:1 shot forget about it.

Fred
How do determine what 1:1 is? How can I figure out what ratio I am getting with a certain lens and an extention tube?
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Old Feb 7, 2007, 7:57 AM   #7
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Very sharp and nice color.

Tom
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Old Feb 7, 2007, 8:30 AM   #8
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inneyeseakay wrote:
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Fred2726 wrote:
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...trying to get a 1:1 shot forget about it.

Fred
How do determine what 1:1 is? How can I figure out what ratio I am getting with a certain lens and an extention tube?
inneyeseakay,
The version of the Kiron lens I own was made for dental use and has a sticker on it to reflect the ratio from 1:3 to 1:1. Thats the only reason I know.
Fred
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Old Feb 7, 2007, 8:53 AM   #9
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inneyeseakay wrote:
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How do determine what 1:1 is? How can I figure out what ratio I am getting with a certain lens and an extention tube?
pretty easy really. your sensor is about 23.5 mm across so if you can fill it with a subject that size you've got it. the old rule of thumb (which i'm not sure is totally accurate but at least is pretty close) was for any given focal length you need that amount of extension to reach 1:1. of course the normal focussing ofthe lens extends it so you don't need a 50mm tube to reach 1:1 with a 50mm lens.

the easiest way to tell what you're getting is just take a close up of a ruler. if the picture covers 23.5mm you're getting 1:1, if it only covers 47mm you've got 1:2 etc.

if you were shooting film or a full frame sensor camera the numbers would change but the idea's the same.

all the best, eric
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Old Feb 7, 2007, 9:18 AM   #10
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Fred, great shots, but nr2 is even more than great.

Ronny
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