Some questions on lenses

[gremlin]

Hi guys,

Why is it that lenses with a lower f-stop are more expensive than those with larger ones? Does this mean a lens that is capable of a larger aperture produces much better quality pics, thus more expensive??


One more thing, can lenses used by film SLR be used on a DSLR?

Educate me...please!

 

[erwinx]

Originally posted by gremlin
Does this mean a lens that is capable of a larger aperture produces much better quality pics, thus more expensive??

Yes, generally. Rule of thumb, you get what you pay for.

One more thing, can lenses used by film SLR be used on a DSLR?

Yes

 

[St[A]LkEr]

I think it is difficult to maintain image quality on large aperture lens tat is y it is of better made and using high quality material to build lens so as to maintain quality output.

 

[Knighthunter]

Hi guys,

Why is it that lenses with a lower f-stop are more expensive than those with larger ones? Does this mean a lens that is capable of a larger aperture produces much better quality pics, thus more expensive??

lens with large aperture need bigger lens elements thus tougher light falloff control (need more elements to control it) and more difficult to manufacture, so the price becomes higher.
Large aperture will not guarantee better quality picture but large aperture allow to use faster shutter speed in the low light condition.





One more thing, can lenses used by film SLR be used on a DSLR?

Educate me...please!

yes but you will encounter focal length multiplier on DSLR except on 1Ds.

 

[gremlin]

Thanks for all the responses... know better now

 

[xmen1977]

Originally posted by Knighthunter


One more thing, can lenses used by film SLR be used on a DSLR?

Educate me...please!

yes but you will encounter focal length multiplier on DSLR except on 1Ds.

to date, most brands of AF lenses can be used on DSLR
but usually poor quality ones perform the worse

so far, there's one from Nikon, the AFS 12-24 IF ED is specially designed for Nikon DSLR, thus not applicable for film SLR

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