Barry_Green
Moderator
The message for a faster iris has been given repeatedly, that I can assure you. Over the years we've seen some slight improvements in the Lumix lenses, the original 14-140 was f4-f5.6, the newer one is like f/3.5-f5.6. They did come out with some fixed 2.8 zooms, but they're extremely short range (about 3x zoom).
I am reminded of this quote from Adam Wilt's review of the DVX200 over on dvinfo.net:
One thing he didn't clearly specify is the weight difference. That first example, the Nikon 24-70 f/2.8G, weighs 3.4 pounds by itself! The 24-85 3.5-4.5G offers more zoom range and weighs 1.02 pounds. Or with the Lumix lenses, the constant f/2.8 weighs 3x as much as the f/4-5.6 lens does. When you're looking at a total camcorder package that weighs 4 pounds all-in, lens weight is a huge consideration. A constant f/2.8 over 20x zoom range? I can't imagine what that would weigh. I have to assume that it would weigh at least 3x as much as the current lens, so we'd be talking about a handheld camera that weighs 9 to 12 pounds, right? Not appealing at all. One of the main things I really like about the UX180 & UX90 is that they trimmed the weight down, it's a full 1/3 lighter than the DVX200 and that makes all the difference.
I am reminded of this quote from Adam Wilt's review of the DVX200 over on dvinfo.net:
How much more would a constant-aperture 13x f/2.8 4/3” lens cost? It’s hard to know for certain, but compare any vendor’s f/2.8 constant-aperture zooms to their non-constant or smaller-opening counterparts.
For example, the Nikkor 24-70mm f/2.8G ED lists for $1800 while the 24-85mm f/3.5-4.5G ED VR is only $500; even the 24-120mm f/4G ED VR is only $1100.
In the Canon lineup, the 24-80mm f/2.8 II is $1800; the smaller-aperture 24-70mm f/4 IS is $850 and the 24-105 f/4 IS is $1000.
In Panasonic’s micro 4/3” lenses, the 35-100mm f/2.8 is $1300 while the 35-100mm f/4–5.6 is a mere $400.
Constant wider apertures are hard to build (read: expensive and bulky) and the jump from f/4 to f/2.8 seems especially difficult. Panasonic’s choice of an f/2.8–4.5 max aperture seems like a sensible compromise to me.
One thing he didn't clearly specify is the weight difference. That first example, the Nikon 24-70 f/2.8G, weighs 3.4 pounds by itself! The 24-85 3.5-4.5G offers more zoom range and weighs 1.02 pounds. Or with the Lumix lenses, the constant f/2.8 weighs 3x as much as the f/4-5.6 lens does. When you're looking at a total camcorder package that weighs 4 pounds all-in, lens weight is a huge consideration. A constant f/2.8 over 20x zoom range? I can't imagine what that would weigh. I have to assume that it would weigh at least 3x as much as the current lens, so we'd be talking about a handheld camera that weighs 9 to 12 pounds, right? Not appealing at all. One of the main things I really like about the UX180 & UX90 is that they trimmed the weight down, it's a full 1/3 lighter than the DVX200 and that makes all the difference.
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