Antarctica

Antarctica
by ʇolɐǝz ǝɥʇ qoq

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0

I travel with a Panasonic DMC-ZS40. Has GPS that labels (or not) the date, time, country, city, landmark etc. Has a zoom that is awesome. Sorry, to report it is superseded by a model without GPS, otherwise a little improved. If my travel camera were lost, I would replace. You can still get the ZS40 from sources on the web. This model features both a rear LCD ...


0

@omega Here's what you are not getting: The 36x24 measurement is the size a classic photo negative taken with 35mm film. It is a well known and accepted measurement. 35mm film was a very commonly used film for 60+ years. Because format size (sensor or film size) determines angle of view for a particular focal length lens, and because 35mm film was so common ...


1

From the exif data: Image size is 2988 pixels height by 5412 pixel length. The file states the actual focal length is 4.8. The file states this vale is the equivalent of a 31mm lens mounted on a full frame. From this we can calculate the crop factor = 31 ÷ 4.8 = 6.4583. The diagonal of a full frame, 24mm height by 36mm length = 43.27mm. The diagonal of this ...


5

In the video, Tony is probably referring to DxOMark's Perceptual Megapixel rating that they developed, because as they say, Most of our readers were not looking at MTF graphs While DxOMark hasn't reviewed the DX 18-55mm ƒ/3.5-5.6G VR II lens yet, here are its 2 predecessor reviews, both mounted on the same D3300 that Tony is reviewing: DxOMark ...


2

The resolution of lenses has been deliberated over the years. John William Stutt, 3rd Barron Rayleigh (English scientist Astronomer Royal 1812 – 1842 Nobel Prize 1904). He published the Rayleigh Criterion, the theoretical resolving power of lenses. This study, and method is still valid today. The lens is caused to image ruled lines. The width of the lines ...


2

There is dark current, as inkista wrote in a comment, and there's quantization noise at the digitizer, and there's gain noise in the analog amplifiers, and there's readout noise ( slightly less than 100% of collected charge is extracted). When people write "scene-limited" or "photon -limited" noise, what they mean is that the photon shot noise is much ...


0

No. The noise is in the photon count, and it is the square root of the number of photons. So if you get 9 photons, the noise level is 3 (33%); if you get 10000 photons, the noise level is 100 (1%). Photons are not perfectly distributed over space, but randomly, and even at perfect 0 K, different receiver buckets will catch different amounts of photons each ...


0

Well, my 7 year old son refused to listen to the advice, but instead changed the setting from 6M quality to 2M quality on my Finepix A610 and it fixed the problem ! If that doesn't work , use 0.3M . Oh, and he says to set the mode to manual, otherwise it will blur. Cool, I'm very happy about that.



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