http://www.flickr.com/photos/olddo/
These photos are pretty good. I wonder who took them and how they were processed?
These photos are pretty good. I wonder who took them and how they were processed?
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I think he meant this in regards to astrophotography. The types of non-Gaussian noise present in an imager can really have an awful impact when you are trying to image point sources in a dark field. For example, in your binder photo at ISO100 there are a number of very bright noise pixels that are barely noticeable at all for that subject but would be very objectionable in a star field or star trail photo.The Sony NEX sensor might be quieter, but to call the Panasonic sensor "horrible" is a bit of hyperbole.
The hot pixels at ISO 100 would have been completely removed with the NR enabled with little if any loss of detail. ISO 800 ... never done it so don't know. I don't do any of this kind of star trail photography.I think he meant this in regards to astrophotography. The types of non-Gaussian noise present in an imager can really have an awful impact when you are trying to image point sources in a dark field. For example, in your binder photo at ISO100 there are a number of very bright noise pixels that are barely noticeable at all for that subject but would be very objectionable in a star field or star trail photo.
I don't do very much of this kind of photography, but what he's saying does match my limited experience with my G1 and older Canon. The character of the G1 noise seems particularly bad for astrophotography. That said I haven't bothered to see if dark frame techniques to remove hot pixels help or not or whether the positions are random from shot to shot.
Ken
Dark frame subtraction will not help as these pop up randomly, varying from shot to shot.That said I haven't bothered to see if dark frame techniques to remove hot pixels help or not or whether the positions are random from shot to shot.
Ken
I took some long exposure shots with my lens cap on with my GH1 to see these artifacts, and I don't see anything. Am I doing the test wrong? RAW with Blacks on default, Recovery and Fill Light at 100%, ISO 100. I ran tests like this all the way from 1-sec to the max 256 seconds doubling the time for every test, and they were all perfectly black.Dark frame subtraction will not help as these pop up randomly, varying from shot to shot.
They are NOT "hot pixels".
It is a serious and real flaw with the sensor unit itself.
(Same behavior is exhibited by the E-410, again a Panasonic NMOS sensor)
What is it we are looking at in that sample? Are the images taken in raw format and then processed equally or are we looking at different levels of in-camera JPGs with some noise reduction applied?Please scroll down to the end of the linked site.
http://photofan.jp/camera/html/modules/newbb/viewtopic.php?topic_id=7735&forum=2&viewmode=flat&order=ASC&start=20
As I see it, the improvement of the E-5's IQ is truly impressive. So, it most definitely will be my next camera.
The G1 is terrible for night shots. The moment you raise the illumination levels, you see graphic noise and banding. So, if you do do night shots, make sure the exposure is exactly what you need and you don't need to push it.I would be most interested to see if anyone can successfully use the E-5 for star trail captures.
Panasonic's NMOS sensors are horrible with random fixed "star bursts" when used for low light long (even 1s) exposures.
(In comparison, for example, Sony's current CMOS sensors do spectacularly well)