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Re: Minor Correction.... (Reply to this comment)
by dkozin,  in Electronics
You are absolutely right - I don't know what I was thinking :)
"Virtual" focal distance drops as the linear dimensions of the sensor. Since there are two dimensions of the sensor (the fact I did not think about), the resolution wil indeed drop as a square of the digital zoom factor.
And yep, there is an AF assist light.
Thank you for pointing these out. I will update my review...
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Dec 14 '04
9:16 am PST
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Also, another niggle.... (Reply to this comment)
by videoismylife
According to the Panasonic website, the FZ-3 does have an autofocus assist light.... does it not have one?
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Dec 13 '04
2:32 pm PST
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Minor Correction.... (Reply to this comment)
by videoismylife
A minor issue with your numbers, in an otherwise very nice complete review.
There are two ways of looking at zoom - multiples of the area or multiples of the linear dimensions. In photography, zoom in general is linear dimensions - so a 50mm lens is "zoomed" 1.6x more than a 35mm lens. A theoretical 4 mpixel sensor producing a 2300X1750 pixel image (4.1Mpix) becomes 1450X1050 with 1.6X zoom - or 1.5 Mpixels.
With digital zoom, the number of pixels will drop as the inverse square of the digital zoom - so 2X digital zoom uses 1/4 the pixels. The math is like this, for a theoretical 12X10mm sensor:
Full sensor = 12x10mm = 120mm^2
2x zoom = 6X5mm = 30mm^2
4x zoom = 3X2.5mm = 7.5mm^2
So, 4X digital zoom uses 1/16 the area (and therefore 1/16 the pixels). That's why the picture is so terrible at 4X digital zoom; a 4 Mpixel camera is showing you just 250K pixels at 4X digital zoom.... nasty!
Here's a quick reference, where I got my info regarding this issue:
http://www.dpreview.com/learn/?/Glossary/Digital_Imaging/Digital_zoom_01.htm
Anyways, nice review; it was useful!
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Dec 13 '04
2:24 pm PST
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Re: Decent research (Reply to this comment)
by dkozin, in Electronics
I have taken a picture of this camera by placing it against the mirror - the photo is on my profile.
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Nov 17 '04
7:04 am PST
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Decent research (Reply to this comment)
by sageandsavory
You are one of the decent researchers on Epinions, and one can use your epinions in place of the manufacturers website, but to get user experience we have to go to another member's review :(
We have no way of knowing whether the equipment lives up to the manufacturer's claims. I want to know everything about a product, especially how it performed for the user and under what conditions.
I suppose the other raters gave this a VH because you are a CL and apparently rank has its privileges.
While I think a CL should set the standard, I guess everyone else believes rank has its privileges. Maybe I'm wrong and it is mandatory that advisors and CL's from other areas give a VH to a CL, if that is the case then someone let me know! If this is not mandatory to always give CLs a VH then you raters should be giving everyone who decently researches a product without using it a VH!
I really think Epinions should have a separate section for those who only do research. They could have the professional reviews, the member research section and then the user section.
Well I don't suppose I will get a response, as I just said the emperor has no clothes.
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Nov 16 '04
2:04 pm PST
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