Search results for 'sensor cleaning' - page 43
Farewell to Pentax
What are you trying to show with this? It would appear that it just illustrates the different sensor sizes on a range of cameras and is derived from the same image taken on any camera, just resized in Photoshop. Each image is identical in framing and DOF, which is not an accurate representation of a...
Posted by Mike-P on 01/05/2010 - 12:55
Farewell to Pentax
The sensor size doesn't matter in one way, because logically if you have an image created at 300 pixels per inch, then more pixels will mean a bigger image. The sensor size has a different effect, in that a bigger sensor has room for more pixels of a given size. Or it could have the same number o...
Posted by johnriley on 01/05/2010 - 14:14
Farewell to Pentax
Just shot two images on the D700. Both at 200mm and ISO 2000 (due to poor light). Same subject within time taken to change from Fx to Dx. Both sized to 800 pixels from full size originals (no manual crop). The subject in the Dx image is larger than the Fx image due to "upsizing". Same sensor, ...
Posted by K10D on 01/05/2010 - 14:14
Farewell to Pentax
Without wanting throw more fuel onto the fire, it is not just the pixel count but the size of the pixels. A full-frame 10mpx camera has the same number of pixels as a 10mpx compact camera, but if the sensor is 10x bigger on the full frame then each pixel will be bigger. We are basically talkin...
Posted by greynolds999 on 01/05/2010 - 14:19
Farewell to Pentax
Hi. I'm not trying to turn this into an argument and I never said I was in it for full frame. What I said is I can hire Nikon lenses and not Pentax. I can hire a 200-400 f/.2.8, a lens I can never justify buying and a lens which simply isn't available for Pentax. Full frame vs crop sensor is a...
Posted by greynolds999 on 01/05/2010 - 19:32
Farewell to Pentax
Hi. I'm not trying to turn this into an argument and I never said I was in it for full frame. What I said is I can hire Nikon lenses and not Pentax. I can hire a 200-400 f/.2.8, a lens I can never justify buying and a lens which simply isn't available for Pentax. Don't get me wrong, I was only tr...
Posted by K10D on 01/05/2010 - 21:05
Farewell to Pentax
The number of photographers with a 600mm f4 lens has never been more than a handful, almost all professionals. They were (are?) made to special order and had a very special price tag! Thank you John, it was probably the high price that stopped most of getting one though :? @Gary you forget about ...
Posted by Anvh on 01/05/2010 - 21:36
Farewell to Pentax
I would just add that of course the sensor is very important but one should not forget the quality of the glass stuck in front of it. Without that you're snookered no matter what sensor you have :wink: Oh and just sitting on the sidelines this thread seems to be getting a little bit heated, I would...
Posted by Greytop on 01/05/2010 - 22:17
Farewell to Pentax
I would just add that of course the sensor is very important but one should not forget the quality of the glass stuck in front of it. Without that you're snookered no matter what sensor you have :wink: Oh and just sitting on the sidelines this thread seems to be getting a little bit heated, I would...
Posted by K10D on 01/05/2010 - 22:27
Black and White Digital
After a conversation with K10d the other day I got to thinking... The only reason I still shoot film (as well as digital) is because I always shoot film in B&W (or monochrome if you prefer). I like the fact it forces me to think in tones rather than colours and prevents the "that's a crappy ...
Posted by greynolds999 on 01/05/2010 - 16:58
Black and White Digital
If you could afford a second body just for B/W that's okay. I couldn't, and therefore it is not on my wish-list. To be honest, I don't really see the point. There are so many brilliant ways to convert colour to mono, and the camera can even be set to produce B/W images. There is nothing stopping ...
Posted by terje-l on 01/05/2010 - 17:11
Black and White Digital
Colour information is (roughly) only 15% of an image. So a B&W-only sensor wouldn't be significantly better...
Posted by flossie on 01/05/2010 - 17:18
Black and White Digital
So if someone developed a mono sensor it should be capable of far higher quality as it's not trying to capture colour information. In theory it would be easier to make but production runs would be much shorter so probably cost more. Actually all sensors only see one thing and that's the light level...
Posted by Anvh on 01/05/2010 - 18:11
Black and White Digital
But doesn't that mean that every pixel would be focussed on producing the mono image and not worrying about the colour? Yes correct and the sensor would have more resolving power as well. I once read a Nikon manual for a compact bridge style camera and it said thet higher resolution was obtained ...
Posted by Anvh on 01/05/2010 - 20:22
Black and White Digital
Because the colour filter is physically in front of the sensor so how do you want to ignore that, the only way to do that is by removing it.
Posted by Anvh on 01/05/2010 - 20:45
Black and White Digital
You could simply take the brightness value of each pixel and ignore what colour it was underneath. The sensor only sees black and white anyway and interpolates what the colours should be.
Posted by johnriley on 01/05/2010 - 20:46
Black and White Digital
John that's the problem since for example a pixel under a red filter only gets red light so it measure the brightness of the redlight... what if the light is green that wont go through the red filter. It's like shooting with coloured filters with a B&W film, according what you just said it does n...
Posted by Anvh on 01/05/2010 - 21:09
Black and White Digital
The benefit of a colour digital image that you convert to BW in PP is that you can experiment with the "filtration", i.e., add a virtual red filter and compare that to adding a virtual yellow filter. With a BW only sensor you would end up carrying (as I do with a film camera) a stack of filters and...
Posted by womble on 01/05/2010 - 22:44
Black and White Digital
John, how can something that is physically in front of the sensor be ignored, that's the part where you lose me? :(
Posted by Anvh on 01/05/2010 - 23:07
Black and White Digital
My point was that if you remove all the filters then all the pixels would only be looking at tone/birghtness. I think I'm out of my depth, all I can say is that a black and white TV gives a better picture than watching a black and white film on a colour TV. You have a black and white TV???:shock:...
Posted by Hardgravity on 02/05/2010 - 08:31
