QUOTE(vincent_audio @ Jan 20 2008, 11:44 PM)
soulfly : agreed it's the camera. But i just fail to see how a D300 can be related to A700 as well as the D40x, D80, D200 and A100. All the camera seems to have different result and picture quality.
BeastX : not even talking about CCD and CMOS. It's about the same sensor mouted on different bodies.
sooyewguan : just sharing some photography opinions, not war at all. You have a valid point to ask because the upgrade involve significant amount of money (at least wat i think). if budget allowed, the D300 upgrade is the best. If not consider canon 40D if u do not have much accessories, or D200 if u want to keep to nikon.
julchin_09 : ya agreed with u if sooyewguan has current accessories. If he only has kitlens and SD cards. Jumping system might be an option.
my apology if my post sounded harsh, but it's all about the truth and facts and my 2 cent opinion that i do not think the image quality of D40x = D80 = D200 = A100 and D300 = A700.
Hi Vincent,
Perhaps I can give you a better understanding of why although those cameras use the same sensor, it still produces very various results.
The CCD or image sensor basically just converts light into electrical signals. These signals are then processed by the camera's DSP (or digital signal processor). Each company's DSP will be their own trademark and own style of manipulating these signals to suit their own. Heck, they can even use the same DSP but if they set the settings different, you will get different images (in terms of sharpness, colour and brightness, etc..etc..).
The D300 and A700 uses a CMOS (metal oxide) sensor, rather than the standard CCD sensors of D40x, D80, D200 and the A100. CMOS sensors are different from CCDs (Charge coupled device). The key difference is the material within these sensors which can relate to how the light is converted, from a photon (light particle) entering the sensor, being accelerated by an electric field in the semiconductor substrate, it the movement of the photon across the field generating a current which transform into your electrical signal which will then go to the DSP.
Each camera manufacturer will build the camera different, they can use the same component but if their layout is different (note that the D40x is smaller compared to the D200), hence every bit of space saving techniques can introduce a lousier image (you can generally see it under low light) as the engineers would probably remove more capacitors and resistors (Low Pass RC filters which are used to remove noise) and cram more components on the PCB (printed circuit board) where your signal lines are then interfered with more noise (the CCD output lines are the most sensitive).
So these are the so called "external" factors you can imagine. Its the same for a car, if proton puts a Honda City engine in its bay, both cars will bring you from A to B. But the journey bringing you there may be different in terms of ride comfort, speed, fuel economy and others.
Hope this explains it all.