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Author Topic: Macro Magnification Question  (Read 2100 times)
Evan
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« on: March 01, 2006, 07:09:30 AM »
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I'm looking at the specs for the olympus 4/3 macro lenses on B&H.  Under magnification, for the 50mm f/2.0 macro, it states:

1:2 (1:1 35mm equivalent)

I thought I understood what lifesize (1:1) meant in that the image on the sensor is the same size as the real life object; therefore, 1:2 means the image on the sensor is half the size as in real life.

So, what does it mean to have a 1:1 in 35mm equvalent?  Isn't lifesize on the sensor/film the same regardless of the sensor/film size?  Is this some sort of marketing thing?

TIA,
Evan
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BJL
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« Reply #1 on: March 01, 2006, 05:02:40 PM »
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Quote
I'm looking at the specs for the olympus 4/3 macro lenses on B&H. Under magnification, for the 50mm f/2.0 macro, it states:

1:2 (1:1 35mm equivalent)

So, what does it mean to have a 1:1 in 35mm equvalent?
[a href=\"index.php?act=findpost&pid=59285\"][{POST_SNAPBACK}][/a]
What they mean is that the smallest subject size with which you can fill the frame is as with a 1:1 macro in 35mm format. To be precise, 1:2 in 4/3 fills the frame with a subject about 26x35mm, whereas 1:1 in 35mm fills the frame with a subject 24x36mm.


But the 4/3 macro lens I like most is the new, cheaper 35/3.5 1:1 macro, which can fill the 8MP frame of an E-500 with a tiny 13x17.3mm field. Smaller pixels have their advantages for us bug photography  fans!
« Last Edit: March 01, 2006, 05:03:28 PM by BJL » Logged
Evan
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« Reply #2 on: March 03, 2006, 04:58:51 PM »
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I kind of figured that's what they were getting at.  I also agree that the 35mm macro seems to be the way to go for the mag and the price difference.  We just received a bunch of the E500s at work and they seem to be very nicely set up.
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