IeraseU
Senior Member
Canon's current 70-200 f/4 does not have IS, are you speaking about a possible future release?
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Canon 400D coming up...
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instamatic
Senior Member
....and I'll be inclined to buy the D80. The D200 is just too expensive in my opinion for what it offers.
Kind regards,
Przemek
Kind regards,
Przemek
George Czajkowski
Forum Enthusiast
You are confusing the picture size (e.g. 3000 pixels by 2000 pixels) with the image resolution (pixel density). High resolution image is one that has its pixels placed very densly, at least 300 pixels per inch.
Resolution (not size) plays a big role in the media and publishing business.
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George
josh007
Senior Member
Yes; and they will release a new 50mm F/1.2 as well.
Keep in mind that Nikon is a small company, I don't think we will be seeing a lens like that anytime soon.
Josh
what is important is the final size in pixels (e.g 3000*2000 for d50). This number of pixels can be printed in different ways e.g 300 dpi or 70 dpi.The bigger number in dpi the smallest final image you get.This happens because in an inch more pixels-dots are printed.But; how it will be printed can be changed through every photo manipulation program (eg. photoshop). Every manufacturer can set a different default number in dpi (they set it to 72 because this is the resolution of our monitors) but what really matters is the total number in pixels.When you will go to have your photos printed ; the lab will convert it always (at least will try to if the total pixels are enough) to 300dpi.
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Nope. It's just a default EXIF parameter value. You can change it to whatever you like with an editor - the image resolution does not change (still 8MP). DPI is a density measurement and depends entirely on number of pixels and print size (or dot pitch on a monitor). For example, an 8MP XT image printed at 4x6 is 576dpi (if your printer can do that!). If you printed 13x19, it would be about 180dpi.
Maxx
Maxx
Yeah but DPI is really just a calculation. It's a derived number by dividing the total number of pixels in one dimension by the unit of linear measure (such as inches) in that same dimension.
Take a 3000 x 2000 image and print it on 4x6 paper and you end up with a maximum of 500dpi (if your print method can do that). That's it. Don't need to know the camera, or anything else about the picture.
If you have a 3000 x 2000 image that "is in 72dpi" that's rather irrelevant. All it really means is you'd have to print it on 42" x 28" paper to have 72dpi.
That's very easy, mount a ND-filter on a 70-200 2.8 VR and you have a 70-200 f4.
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Regards,
Robert
I think you are completely off the mark, and don't understand the concept of DPI. There, I said it.
DPI means Dots Per Inch. A JPEG image will only have a 2-dimensional array of pixels, say 3000x2000 (using this as an example). A JPEG image doesn't have any DPI at all - it's not aware of inches, millimeters of any other distance unit. A 3000x2000 pixles image contains the same amount of information regardless from what camera it came (of course, image quality differences aside). DPI only comes into play when you want to render those pixels onto a physical surface or device.
When you print the image at 300 DPI, the image from my example above will print at a size of 10"x7" (approx), regardless of what camera produced it. I can assure you with 100% confidence that a Canon image of 3000x2000 pixels will print in the exact same manner at 300 DPI as a Nikon image of 3000x2000 pixels (of course, image quality differences aside).
A Canon image doesn't have 72 DPI, no more than a Nikon image has 300 DPI. All they have are the 3000x2000 pixels of information.
DPI means Dots Per Inch. A JPEG image will only have a 2-dimensional array of pixels, say 3000x2000 (using this as an example). A JPEG image doesn't have any DPI at all - it's not aware of inches, millimeters of any other distance unit. A 3000x2000 pixles image contains the same amount of information regardless from what camera it came (of course, image quality differences aside). DPI only comes into play when you want to render those pixels onto a physical surface or device.
When you print the image at 300 DPI, the image from my example above will print at a size of 10"x7" (approx), regardless of what camera produced it. I can assure you with 100% confidence that a Canon image of 3000x2000 pixels will print in the exact same manner at 300 DPI as a Nikon image of 3000x2000 pixels (of course, image quality differences aside).
A Canon image doesn't have 72 DPI, no more than a Nikon image has 300 DPI. All they have are the 3000x2000 pixels of information.
Endi S. Dewata
Active member
George,
The DPI from the pictures itself is meaningless. In Photoshop you can change the DPI in your picture and it wont make any difference to the picture itself. The DPI only determines how big your picture will appear in a particular medium. Suppose you have a 3000 pixel long picture (regardless from any cameras). In a 300 DPI print medium it will show up as 10 inch long, but in a 72 DPI web page it will show up as 41.67 inch long. Hope this clears it up.
Endi
The DPI from the pictures itself is meaningless. In Photoshop you can change the DPI in your picture and it wont make any difference to the picture itself. The DPI only determines how big your picture will appear in a particular medium. Suppose you have a 3000 pixel long picture (regardless from any cameras). In a 300 DPI print medium it will show up as 10 inch long, but in a 72 DPI web page it will show up as 41.67 inch long. Hope this clears it up.
Endi
...its a bother to change all the time to 300 dpi when you work with images for professional publishing or printing. For professional work its better to have the default set at 300 dpi.
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D
David Martin
Guest
Of course you can print out Canons, Nikons, Sonys, whatever you want, at 300dpi.
I've got no idea what you have been up to, but you have managed to seriously confuse yourself.
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Regards,
DaveMart
'Just a wildebeast on the plain of life'
Please see profile for equipment
Okeo
Senior Member
No, George you are confusing things. If I have a picture that is 3000 pixels across, and I print it so that that side is 10" in size, then I'll have 300 dpi resolution. If I however take the same picture and print it so that it is 30" in size, then I'll have 100 dpi. Same image, just different output size. dpi is a result of image size and print size.
Indeed. But size determines resolution when it comes to a digital picture.
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David Chin
Forum Pro
... please don't confuse 10MP picture resolution with 72 / 300 DPI print settings.
Two cameras having 10MP may yield pictures with slightly different resolution which could be due to different quality of the sensors, or different capabilities in image processing.
You won't find any camera review site saying Canon 400D is not a good camera because of having only 72 DPI - trust me on this.
Regards, David Chin
(D.7.0. & C.P.4.5.0.0.)
Nikon D80 Links:
http://www.nikond80links.com
http://www.pbase.com/dlcmh/nikon_d80_sneak_pictures
Links to all my other sites:
http://www.flickr.com/people/davidchinphoto
Two cameras having 10MP may yield pictures with slightly different resolution which could be due to different quality of the sensors, or different capabilities in image processing.
You won't find any camera review site saying Canon 400D is not a good camera because of having only 72 DPI - trust me on this.
--It's still a baby dSLR. Very cramped. No top display, no command
dials, very difficult to hold due to small size and almost no room
between grip and lens...
But the biggest disappointment for me with Rebel XT was its dismal
picture resolution: 72 DPI. Even my Canon PowerShot S3 IS offers
180 DPI, my old 4MP Kodak P&S has 220 DPI, while Nikon
D50/D70/D70s/D80 all offer true high resolution: 300 DPI. I wonder
if they improved DPI in the new model.
Sensor cleaning is only a sales gimmick. Tests done on Sony A-100
show it is mostly ineffective. I think this is the reason why Nikon
did not put it in D80.
I still prefer Nikon D80
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George
Regards, David Chin
(D.7.0. & C.P.4.5.0.0.)
Nikon D80 Links:
http://www.nikond80links.com
http://www.pbase.com/dlcmh/nikon_d80_sneak_pictures
Links to all my other sites:
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D
David Martin
Guest
..to knock the weight of the big 70-200/2.8 beasts down a bit would be nice!
It would be handy if it cost minus $1000 or so, too!
I find I am in my usual situation, unless Nikon have done something really horrible to the D80 like make it so you can't turn off the NR, or it is substantially more noisy than the D50, I would far prefer it to the 400D.
Sensible AF point arrangement and good viewfinder spring to mind.
OTOH, that 70-200/4 IS would be wonderful...
I suppose I will have to fork out for a 5D at some time, but my preference now for lower level cameras is certainly for the Nikons - and that was not true a couple of years back.
Regards,
DaveMart
'Just a wildebeast on the plain of life'
Please see profile for equipment
It would be handy if it cost minus $1000 or so, too!
I find I am in my usual situation, unless Nikon have done something really horrible to the D80 like make it so you can't turn off the NR, or it is substantially more noisy than the D50, I would far prefer it to the 400D.
Sensible AF point arrangement and good viewfinder spring to mind.
OTOH, that 70-200/4 IS would be wonderful...
I suppose I will have to fork out for a 5D at some time, but my preference now for lower level cameras is certainly for the Nikons - and that was not true a couple of years back.
--That's very easy, mount a ND-filter on a 70-200 2.8 VR and you have
a 70-200 f4.
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Regards,
Robert
Regards,
DaveMart
'Just a wildebeast on the plain of life'
Please see profile for equipment
George Czajkowski
Forum Enthusiast
Thank you for supporting my point of view. It so happens that I was involved in submitting some shots to a publishing company and I know they insisted on 300 dpi resolution.
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George
Katania
Leading Member
It does, but because dpi determines real world dimensions in relationship to pixel dimensions, it needs to be changed anyway for every specific use.
The same image used in a magazine might result in a dpi of 364 image while when blown up for a huge road side poster, it may end up having only 56dpi.
150 and 300dpi are just used in the publishing world to determine the minimume quality requirements.
In other words, what ever the initial dpi value may be, it always needs to be changed anyway.
But that wasn't your point of view. Your point of view, as you expressed it originally, is that Nikon gives you 300dpi images and Canon gives you 72dpi images. You never said anything about the default value being more convenient for photo editing/printing/submission purposes!
D
David Martin
Guest
I would have thought anyone engaged in anything approaching professional publishing would have access to software which would make it no bother at all to spefiy whatever dpi they fancied.
I certainly have no difficulties at all using my very amateur set-up.
A £30 copy of Qimage sorts all that out, together with any other printing stuff.
Regards,
DaveMart
'Just a wildebeast on the plain of life'
Please see profile for equipment
I certainly have no difficulties at all using my very amateur set-up.
A £30 copy of Qimage sorts all that out, together with any other printing stuff.
--
Regards,
DaveMart
'Just a wildebeast on the plain of life'
Please see profile for equipment
Frank B
Veteran Member
I would also prefer the D80 for its ergonomics and viewfinder. Of course, we will have to wait to form conclusions with respect to picture quality. By the way, 72DPI, 300DPI are just how the picture is displayed on your computer and you can interchange those number without affecting actual picture quality (e.g. I can display at 72 DPI, 220 DPI, 300 DPI with any digital camera). It is all in how you set up your software.
I agree that based on the early reports the Sony dust removal system does not appear to be very effective. However, that does not mean the Canon won't be effective. I had an Olympus E300 and E500 and the dust removal systems worked well.
Frank B
D50
Nikon 18-200 VR
Canon 500D close-up lens
Photos
http://www.fototime.com/ftweb/bin/ft.dll/pictures?
I agree that based on the early reports the Sony dust removal system does not appear to be very effective. However, that does not mean the Canon won't be effective. I had an Olympus E300 and E500 and the dust removal systems worked well.
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Frank B
D50
Nikon 18-200 VR
Canon 500D close-up lens
Photos
http://www.fototime.com/ftweb/bin/ft.dll/pictures?
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