the magnification spec is so you can compare the closeup capabilities of lenses of different makes and models and focal lengths directly. The magnification scale on the lenses also allows you to calculate the exact exposure compensation needed with manual exposure settings. those are both "real good reasons" to know the magnification/reproduction ratios. jco
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 10, 2004 12:22 PM To: [EMAIL PROTECTED] Subject: Re: 50 or 100 mm I never could understand this 1:1, 3:1, 4:1 talk. Unless you are doing scientific work or have a real good reason to know your magnification, who cares. It's all about the image you're seeing through the viewfinder. If you're close enough to get the image you want, it's all you need.... I think some of us worry too much about the specifications of a lens rather than ask the questions: does it do what I need it to do to get the images I want. I have a 100mm macro that gives me 1:1. Do I use 1:1 very often? No. I have another 100mm macro that gives me 1:2. It's half the size, half the weight and performs beautifully 99 per cent of the time. If I need to get closer I'll stick on an extension tube. Just my two cents Vic
