Originally posted by Jerome
Hmmm, about the softness of images, that was a nice analogy about spices and food. Now I know why.
But I still can't quite accept the reason that the softness is to give users more freedom to do post-processing of USM. Maybe more for graphics artists who, for whatever reason, do not want sharp images? For me as a photographer, I will want my images to be tact sharp all the time. So bcos of this, I find myself having to use USM more than 85% of the time. Else, compared to my prints even at 4 x 6 from slides, the digital images look like they were taken with a $200 lens instead of $2000 L lens.
Ok, would anyone be kind enough to briefly explain what Pekka software is? Thanks!!!
Originally posted by jasonpgc
Base on Red Dawn's explaination
Therefore can assume bigger pixel size plus CMOS equal less noise?
Looking at the >3 million pixels DSLR in the market,
we use this basic equation,
Pixel size = (sensor area)/ (Pixel count)
D30 : CMOS
Pixel count = 3.11 million
Sensor size =22.7 mm x 15.1 mm = 342.77 mm2
Pixel size= 110.22 micro mm2
D60 : CMOS
Pixel count = 6.29 million
Sensor size =22.7 mm x 15.1 mm =342.77 mm2
Pixel size= 54.49 micro mm2
1D : CCD
Pixel count = 4.06 million
Sensor size = 28.7 x 17.8 mm = 510.86 mm2
Pixel size= 125.83 micro mm2
D100 : CCD
Pixel count = 6.0 million
Sensor size = 23.7 x 15.6 mm = 369.72 mm2
Pixel size= 60.45 micro mm2
D1X : CCD
Pixel count = 5.89 million
Sensor size = 23.7 x 15.6 mm = 369.72 mm2
Pixel size= 61.58 micro mm2
It shows that 1D has the largest pixel size, followed by D30, D1X, D100, and D60 has the smallest pixel size.
What does it tell you, EOS fans?
Originally posted by kamwai
for SLR's lens, it can range from a few hundreds to a few thousands....Super high zoom power or Super wider angle lens cost a bomb, and the bigger the max aperture, the more expensive it is.
eg. my 50mm/f1.8 new one is selling $135, but a 50mm/f1.4 USM is $500++, they are prime lens (cannot zoom) but this slight different can cost so much already.
Originally posted by ckiang
You see, you need different levels of USM at different output sizes. Web-destined images will need less USM than a 20x30" print, for example. Amount of USM needed also varies for different types of subjects. Portraits probably need a bit less USM than a detailed landscape, for example. If the camera had pre-sharpened everything toa certain setting, it's not going to be very flexible.
Even when you send in your negatives and slides for printing, they are not printed straight. In the modern digital minilabs used by the photo labs, the film is first scanned into digital files. According to the print size, USM is applied to to the files before they are output via laser onto photo paper, then developed.
Same goes when you do your own scanning of film and photos. USM is always needed.
Regards
CK
Originally posted by TME
What does the USM stand for here? Is it the same as the USM used in Canon lenses?
Originally posted by TME
Having a USM is not a small difference dude. It's the USM and not the aperture difference that boosts the cost of the f/.4 lens.
Originally posted by MadAnt
USM - UnSharpen Mask ( DOn't you think it sounds a bit misleding given it is use to 'sharpen' an image? )
As you can see.. nope it is not the same as the USM ( is it Ultra Sound Motor? ) used in canon lens...
Cheers,
MadZ.. waiting for Minolta to come out with a DSLR
Originally posted by ckiang
Minolta DOES have digital SLRs, one of them is the RD175.
Regards
CK
Originally posted by jasonpgc
Base on Red Dawn's explaination
Therefore can assume bigger pixel size plus CMOS equal less noise?
Looking at the >3 million pixels DSLR in the market,
we use this basic equation,
Pixel size = (sensor area)/ (Pixel count)
D30 : CMOS
Pixel count = 3.11 million
Sensor size =22.7 mm x 15.1 mm = 342.77 mm2
Pixel size= 110.22 micro mm2
D60 : CMOS
Pixel count = 6.29 million
Sensor size =22.7 mm x 15.1 mm =342.77 mm2
Pixel size= 54.49 micro mm2
1D : CCD
Pixel count = 4.06 million
Sensor size = 28.7 x 17.8 mm = 510.86 mm2
Pixel size= 125.83 micro mm2
D100 : CCD
Pixel count = 6.0 million
Sensor size = 23.7 x 15.6 mm = 369.72 mm2
Pixel size= 60.45 micro mm2
D1X : CCD
Pixel count = 5.89 million
Sensor size = 23.7 x 15.6 mm = 369.72 mm2
Pixel size= 61.58 micro mm2
It shows that 1D has the largest pixel size, followed by D30, D1X, D100, and D60 has the smallest pixel size.
What does it tell you, EOS fans?
Originally posted by MadAnt
USM - UnSharpen Mask ( DOn't you think it sounds a bit misleding given it is use to 'sharpen' an image? )
As you can see.. nope it is not the same as the USM ( is it Ultra Sound Motor? ) used in canon lens...
Cheers,
MadZ.. waiting for Minolta to come out with a DSLR
Originally posted by TME
Oh well!! Maybe we can all use some other acronym to avoid confusion. And yes I wonde why Unsharp Mask and not sharpen mask!! And yes, I am waiting for Minolta to come out with a really pro digital SLR like the D30 from Canon. That seems to be currently the digital SLR of choice. I wonder if they could come out with one that uses the Dynax 7 body. Shouldn't be too difficult u know - to meld the electonics of the D7i(with some more major improvements) and the technical features of the Dynax 7. It would really be cool and if it sold for less than the D30, it would be a hot seller. I may end up in a line for it then........
Originally posted by ckiang
It dates back to the olden days of traditional darkroom printing, whereby a "unsharp" (yes, as in not sharp) negative is sandwiched between the sharp one to enhance the sharpness of the final print.
Regards
CK
Originally posted by TME
As in there were 2 negatives of the same scene? That would not occur all the time would it?
Originally posted by TME
As in there were 2 negatives of the same scene? That would not occur all the time would it?