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Old Dec 3, 2005, 5:12 PM   #1
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i am trying to decide on a macro lens. i will be using the camera for photos of my orchids. i need to get close to my subject (because i have little room to back up in my photo taking area) and i am using available light - sunlight coming from behind me on my screened-in balcony.

please define 'fast lens' for me and tell me if it should be a consideration in my decision. i am considering a 50mm macro lens.

another question . . . if 1:1 is better macro than 1:3.5, then 1:.05 is better than 1:1, yes?

tia

ellen fl
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Old Dec 3, 2005, 6:51 PM   #2
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ellen, how much money do you want to spend??
a fast lens is one with a large aperture(smallest f-stop number, like f2.8) the problem is depth of field, DOF, is affected by aperture. shooting macros you usually want as much DOF as you can get- higher f-stop, slower speed. for available light macros you will really need a good tripod. why not use the onboard flash??? a 100mm macro lens will get you about one foot away from the suject so you can use the flash. a 50mm will be under 6'' away. i'm not sure if the onboard will work at that distance.
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Old Dec 4, 2005, 4:22 PM   #3
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no problem with a tripod . . . i always use one. i would like to spend around $200 which is why i'm looking at the sigma 50mm. i assume f2.8 is fast enough?

i'd rather set up supplemental light than use the flash.

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