Questions on lens elements and shutter blades

[Snoweagle]

Sorry, maybe wrong comparison. How about this comparison: Canon EF70-300 f4-5.6 with 15 element with Tamron AF70-300mm f4-5.6 with 13 element? Just from this specification alone and not from brand name reputation, can any inference be made about which lens is better; akin to comparing computer specs before purchase

Obviously the Canon one has more elements due to IS.

 

[giantcanopy]

For example I noticed that the Canon L lens usually has more lens element than the cheaper lens eg EF 50mm f1.2L has 8 lens elements with 8 aperture blades whilst the EF 50mm f1.8 has only 6 lens elements with 5 aperture blades.

Increasing the number of lens elements adds more degree of freedom in correction of aberrations for the lens designer, especially a lens of such a huge aperture such as the 50mmf1.2.

Ryan

 

[two200]

Thanks for all the replies. Now I have a better understanding of lens elements and aperture blades.

 

[FireZ]

to add on a question...er...big huge lens have more elements?..
coz at shopping mall..i always c those ppl use super huge lens..whereas kit lens is like..only using 58mm filter....those big lens r like...77mm or +++...
cheers

 

[Octarine]

to add on a question...er...big huge lens have more elements?..
coz at shopping mall..i always c those ppl use super huge lens..whereas kit lens is like..only using 58mm filter....those big lens r like...77mm or +++...

From your 18-55 kit lens with 58mm filter to a well-reputable 17-40 L grade lens with 77mm filter it's only one lens element difference.

 

[J-Chan]

and 2 58mm thread lenses like the 50 1.4 vs 70-300 IS is like 10 elements difference?