Some ques about DSLR?

[cool.dx.rip]

Guys,just out of curiosity while researching in net for compact camera advices this questions i found this ques in my mind for DSLR camera.Just simple answer will be fine. 1.Which is best DSLR camera in the world in terms of performance.such in gpu GTX 690 or ATI 7990. 2.is it possible to use one brands lens in another brand dslr camera? 3.what is Most widest,zommiest lens is found in market for dslr camera's?

 

[SecurityTheatre]

Your questions are out of context, so some are hard to answer.

1) Depends on what you need. Fastest framerate? Highest resolution? Fastest shutter lag? Best autofocus speed? Highest video framerate? Best high-ISO performance?

The answer for each of those questions is a different camera. I would say: Canon 1Dx, Nikon D800e, Nikon D4, Nikon D4, Canon 5D Mark 3, Nikon D4, respectively, with some of them being vague because of different types of metrics used for these measurements (and some are subjective).

2. Theoretically, yes, but only with an adapter and usually only with minimal features. Practically, no, it's not worth it.

3. Most widest zoomiest?

uhm.... right.

Widest angle rectilinear lens (for full-frame 35mm sensors) is 12mm at the widest.
http://www.photozone.de/Reviews/310-sigma-af-12-24mm-f45-56-ex-hsm-dg-lab-test-report--review

Longest zoom lens (designed exclusively for photography) I can think of was an extremely rare Nikon lens (Saddam Hussein used to own one).
http://www.nikon.com/about/feelnikon/recollections/r16_e/

The "fastest" lens (allows the most light) still in mass production is this:
http://en.leica-camera.com/photography/m_system/lenses/5915.html


So what is your favoritist biggest zoomiest car?

 

[iGas]

Guys,just out of curiosity while researching in net for compact camera advices this questions i found this ques in my mind for DSLR camera.Just simple answer will be fine. 1.Which is best DSLR camera in the world in terms of performance.such in gpu GTX 690 or ATI 7990. 2.is it possible to use one brands lens in another brand dslr camera? 3.what is Most widest,zommiest lens is found in market for dslr camera's?

You can use pretty much any brand of lens with mount adapter for any camera body, but you will lose the ability to focus and possibly aperture control (aperture maybe control manually if the lens is not an electric aperture control), and some lens may not work at all due to rear element hamper the mirror mechanism.

One camera body is best suit for certain photographer, but it may not suit others.

Landscape and architecture photographers enjoy medium or large format film cameras because it let them control perspective with high resolution and high colour saturation, while sport photographers prefer accurate and fast auto focus that generally associate with FF, APS-H and APS-C cameras. And, others may enjoy the convenience of having smaller formats because they are more portable.

That said, any top of the line camera today will be obsolete and will be beaten by inexpensive future bodies that cost 1/10 of the price in 5-10 years. While lenses will still be usable in 10+ years, while some lenses will be more than capable in 30+ years.

My Canon EF 50mm f/1.8 from 1987 still perform perfectly well on my 5DmkII, and it still is quite sharp by today standard.

There are lenses from all manufacture that are 50+ years old, and some as old as 70-80 years old are very capable when use with mount adapters.

 

[fralexandr]

is there any DSLR lens zoomier than an 18-300mm superzoom (16.7x zoom)?
http://www.kenrockwell.com/nikon/18-300mm.htm
it's decently wide, and very zoomy.

although the widest "rectilinear" aps-c lens I know of is the 8-16mm sigma (which is supposed to be ~12mm FF on some camera bodies, a 12-24mm sigma on FF still seems to have a wider angle though)
http://www.kenrockwell.com/sigma/8-16mm.htm

and most likely by "best" DSLR you'd be going with a FF body anyway

most ridiculous lens i know of
http://www.sigmaphoto.com/product/200-500mm-f28-apo-ex-dg

 

[iGas]

is there any DSLR lens zoomier than an 18-300mm superzoom (16.7x zoom)?
http://www.kenrockwell.com/nikon/18-300mm.htm
it's decently wide, and very zoomy.

although the widest "rectilinear" aps-c lens I know of is the 8-16mm sigma (which is supposed to be ~12mm FF on some camera bodies, a 12-24mm sigma on FF still seems to have a wider angle though)
http://www.kenrockwell.com/sigma/8-16mm.htm

and most likely by "best" DSLR you'd be going with a FF body anyway

most ridiculous lens i know of
http://www.sigmaphoto.com/product/200-500mm-f28-apo-ex-dg

http://www.flavorsofthought.com/costliest-camera-lens.html

Zeiss Apo Sonnar T * 1700 mm F4 – disclose

LEICA APO-TELYT-R 1:5.6 / 1600mm – 16 million USD ($ 2,064,489)

 

[cool.dx.rip]

thanks guyss