TUSHAR T.
Which camera is better in comparison with regards to the clarity of the image in the zoomed mode? And which of the cameras above can have the best zooming capacity (DSLR or higher point & shoot) ?
That is in comparison to a DSLR camera having 18-55mm lens.
Answer
DSLRs have a much higher degree of quality than compact cameras such as the P510.
Thing is, the higher power zoom lens you have, the worse optical quality it has. With a ridiculous 42x zoom, the optical inferiority is likely to be quite noticeable at different zoom settings. They are so mediocre, I just cannot understand why people do not realize this and continue to buy them.
In contrast, DSLRs - at least those with zooms, typically have lenses in the 2x to 4x range - but that is not to say DSLRs are limited in their zoom capacity.
I do have to back up here a bit and explain that generally DSLR owner's don't use the "X" factor when talking about lenses. They typically talk in focal lengths.
A zoom lens is one that has different focal lengths. But in the DSLR world, not all lenses are zoom as Jim pointed out. Some are fixed to one focal length (call them 1x zooms if you want).
But those lenses are absolutely the highest quality lenses you can buy, and are often used in Wedding Photography, Macro, and other specialized purposes when you need the best lens you can get.
Having said that, most DSLR lenses though are zoom. And since the lenses on DSLRs are interchangeable, the idea is to have many different focal length zoom lenses that collectively make up the total zoom range of the camera.
The reason for this is that the high optical quality is maintained by using multiple short zoom and fixed lenses rather than an optically inferior single zoom lens like the 42x lens on the P510.
Personally, I have 8 lenses - from 10mm to 400mm. Collectively, I suppose you could say that is equivalent to 40x in zoom power. The difference though, is each lens is many, many times more precise and optically perfect than the single lens on the P510. I just have to change lenses to do so.
And that does not happen as much as you might think as each kind of photography favors a different lens. If I am shooting sports, I don't need to take my macro, wedding, or landscape lenses - if I am shooting scenery, I will not be needing my sports or nature lens, and so on.
So I never need all 8 of my lenses at the same time - two or three at the most is all I ever carry.
In contrast, a single 42x lens is burdened with parts of the lens that will never be used at the same time - so you are sacrificing quality for a lens that you will never fully utilize.
Since you are comparing a DSLR with a kit lens (18-55mm), true - it will not have as long of a zoom as the P510 (18-55mm = 3x), but that lens will still be optically superior.
The reality of the situation is the 42x lens on a compact camera is a disadvantage, an no matter how much shorter the lens on a DSLR is - it does not matter - as the lens will be orders-of-magnitude optically superior. And if you decide you need another lens to cover a different part of the "zoom range" (to use compact camera terms), just go out and buy one. In that regard, "zoom power" is almost unlimited in a DSLR.
In the Nikon catalog, you can buy lenses from 10mm to 600mm, which is equivalent to 60x worth of zoom power. You just buy the segments of the "zoom range" that you want (and can afford). There is no compact camera that can touch 60x worth of high-quality zoom power.
DSLRs have a much higher degree of quality than compact cameras such as the P510.
Thing is, the higher power zoom lens you have, the worse optical quality it has. With a ridiculous 42x zoom, the optical inferiority is likely to be quite noticeable at different zoom settings. They are so mediocre, I just cannot understand why people do not realize this and continue to buy them.
In contrast, DSLRs - at least those with zooms, typically have lenses in the 2x to 4x range - but that is not to say DSLRs are limited in their zoom capacity.
I do have to back up here a bit and explain that generally DSLR owner's don't use the "X" factor when talking about lenses. They typically talk in focal lengths.
A zoom lens is one that has different focal lengths. But in the DSLR world, not all lenses are zoom as Jim pointed out. Some are fixed to one focal length (call them 1x zooms if you want).
But those lenses are absolutely the highest quality lenses you can buy, and are often used in Wedding Photography, Macro, and other specialized purposes when you need the best lens you can get.
Having said that, most DSLR lenses though are zoom. And since the lenses on DSLRs are interchangeable, the idea is to have many different focal length zoom lenses that collectively make up the total zoom range of the camera.
The reason for this is that the high optical quality is maintained by using multiple short zoom and fixed lenses rather than an optically inferior single zoom lens like the 42x lens on the P510.
Personally, I have 8 lenses - from 10mm to 400mm. Collectively, I suppose you could say that is equivalent to 40x in zoom power. The difference though, is each lens is many, many times more precise and optically perfect than the single lens on the P510. I just have to change lenses to do so.
And that does not happen as much as you might think as each kind of photography favors a different lens. If I am shooting sports, I don't need to take my macro, wedding, or landscape lenses - if I am shooting scenery, I will not be needing my sports or nature lens, and so on.
So I never need all 8 of my lenses at the same time - two or three at the most is all I ever carry.
In contrast, a single 42x lens is burdened with parts of the lens that will never be used at the same time - so you are sacrificing quality for a lens that you will never fully utilize.
Since you are comparing a DSLR with a kit lens (18-55mm), true - it will not have as long of a zoom as the P510 (18-55mm = 3x), but that lens will still be optically superior.
The reality of the situation is the 42x lens on a compact camera is a disadvantage, an no matter how much shorter the lens on a DSLR is - it does not matter - as the lens will be orders-of-magnitude optically superior. And if you decide you need another lens to cover a different part of the "zoom range" (to use compact camera terms), just go out and buy one. In that regard, "zoom power" is almost unlimited in a DSLR.
In the Nikon catalog, you can buy lenses from 10mm to 600mm, which is equivalent to 60x worth of zoom power. You just buy the segments of the "zoom range" that you want (and can afford). There is no compact camera that can touch 60x worth of high-quality zoom power.
Camera Lens ?
Thrillz
I picked up a Vivitar 85-205mm 1:2.8 lens number 22530272
today and i was wonering if they sell a adaptor to convert these old lens
for dslr cams?
I have a sony a100 and i would love to be able to use this lens with it. The zoom on it looks cool and the macro features on it are neat.
I just hope i can get a adaptor to fit it.
If not what camera would it work on?
Answer
Your lens is a manual focus lens. The Sony A100 is an autofocus camera. So, you won't get metering or autofocus.
If the Vivitar is a screw-mount, you might be in luck for a converter/adapter--there are M42 screw mount to Sony/Minolta AF adapters available, even on amazon.com
If the Vivitar lens is any other mount, then you are out of luck. If it is a Minolta MD mount lens, there are Minolta MD to Sony/Minolta AF adapters, but they are of poor quality--they have to add a glass element to get to infinity focus and this greatly degrades image quality. Any other mount--Pentax, Canon, Nikon, etc--and there's no adapter.
You might also want to see this page; this person apparently developed a work-around to allow old Minolta lenses to mount to Sony AF mounts:
http://www.flickr.com/photos/arkku/1266938702/
Otherwise, to figure out what camera your lens would work on--first figure out the lens mount on the Vivitar and go from there.
Your lens is a manual focus lens. The Sony A100 is an autofocus camera. So, you won't get metering or autofocus.
If the Vivitar is a screw-mount, you might be in luck for a converter/adapter--there are M42 screw mount to Sony/Minolta AF adapters available, even on amazon.com
If the Vivitar lens is any other mount, then you are out of luck. If it is a Minolta MD mount lens, there are Minolta MD to Sony/Minolta AF adapters, but they are of poor quality--they have to add a glass element to get to infinity focus and this greatly degrades image quality. Any other mount--Pentax, Canon, Nikon, etc--and there's no adapter.
You might also want to see this page; this person apparently developed a work-around to allow old Minolta lenses to mount to Sony AF mounts:
http://www.flickr.com/photos/arkku/1266938702/
Otherwise, to figure out what camera your lens would work on--first figure out the lens mount on the Vivitar and go from there.
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