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Commented on Olympus 75mm F1.8 for Micro Four Thirds gets $900 price-tag news story
> Come on, it's a 150mm f/1.8 lens. It is not a 150/1.8 lens. It is a 75/1.8 lens. It has the same FOV, DOF and captures the same number of photons per time as a 150/3.6 lens would on "full...
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Replied in K30
HI Eric!
Even if I am in M on a two-dial camera, I never change both at the same time, it feels it loosens my grip. So there's no speed advantage. With one dial, I have to press an additional...
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Replied in K30
Hi guys!
Every cost to the manufacturer gets multiplied by 5 or 10 (depending on the industry) until it reaches the hands of the consumer.
A dial has implications on design, manufacture,...
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Commented on Pentax K-01 studio test shots published news story
*punch* Sorry, must have misread your request ;)
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Commented on Canon acknowledges 'light leak' in the EOS 5D Mark III news story
I detect a sarcasm leak here.
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Commented on Nikon defends decision to stop supplying spares to independent repairers news story
Osam, how do you get from "repairing broken parts" to "sharing an operating system"?
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Commented on Just posted: Our Samsung NX200 in-depth review news story
I'm pretty sure that they did mean full-time manual focus. This type of motor allows full time manual override of the autofocus.
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Commented on Cosina announces Nokton 17.5mm F0.95 lens for Micro Four Thirds news story
> Cropping, however, doesn't reduce DOF So very very wrong.
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Commented on Tamron releases image-stabilized 24-70mm F2.8 zoom news story
The light densities (photons per area and time) of all f/2 lenses are the same - but I never said anything else. But an f/2 lens on "full frame" will cover roughly twice the area than f/2 on...
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Commented on Tamron releases image-stabilized 24-70mm F2.8 zoom news story
No, it's completely true - everything I said. I said "number of photons" - not "density of photons". It's simple physics, but I have realised by now that people are very reluctant to accept it....
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Commented on Tamron releases image-stabilized 24-70mm F2.8 zoom news story
The X10's lens is a 7.1-28.4mm f/2.0-2.8. If you want to compare that to a lens on "full frame", this can be done, but not by multiplying only one set of those numbers. The X10's lens is...
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Commented on Kenko-Tokina Reflex 300mm F6.3 compact telephoto for Micro Four Thirds news story
Yes, this works - Sigma (IIRC) even had a two-piece lens-cap for that purpose. I have used cardboard cut-outs. I have tried with centred holes, though. It was mildly successful to increase exposure...
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Commented on Kenko-Tokina Reflex 300mm F6.3 compact telephoto for Micro Four Thirds news story
Of course you have to multiply the f-stop as well, as the f-stop is a measurement including the focal length and the aperture diameter. The same aperture diameter (and equivalent f-stop) lets...
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Commented on Kenko-Tokina Reflex 300mm F6.3 compact telephoto for Micro Four Thirds news story
That's interesting, I think. Live view focusing will mean that the relatively shallow DOF is less of an issue. Maybe it will even take normal front-mounted filters? The small size will make its...
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Commented on Similar, but not copied, image found to breach copyright news story
April 1st yet?!
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Commented on Similar, but not copied, image found to breach copyright news story
Sorry, I mad a mistake. No more selective colouring for me, either.
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Commented on Panasonic shows 12-35mm F2.8 and 35-100mm F2.8 concept lenses for Micro Four Thirds news story
No, Jacques, this was not an excellent summary by Zvonimir. The distinction between "total light" captured (number of photons) and "light density" (photons per area) is crucial with sensors of...
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Commented on Panasonic shows 12-35mm F2.8 and 35-100mm F2.8 concept lenses for Micro Four Thirds news story
Nikkor: There are no _equivalent_ 4/3 lenses to a 24-70/2.8 - this would be a 12-35/1.4. Otherwise, I agree, horses for courses, just make sure to compare properly. Vlad: Equivalence is not...
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Commented on Panasonic shows 12-35mm F2.8 and 35-100mm F2.8 concept lenses for Micro Four Thirds news story
Comparing to FF is not odd or flawed. If the prices stay as announced, the FT f/2.8 lens is more expensive than a "FF" f/4.0 (or f/5.6) lens that has better (or the same) DOF control due to the...
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Commented on Panasonic shows 12-35mm F2.8 and 35-100mm F2.8 concept lenses for Micro Four Thirds news story
Actually, the physical aperture (=diameter) of 12/2.8 on FT and 16/3.6 on APS-C are the same. The F-number is different, though (obviously).
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