What does it mean when u say a lens is fast?

[limmatthias]

However, it comes in very handy in low-light conditions where sometimes you can get away with a sharp picture (no handshake blur) without using a tripod.

wee... so its quite useful for indoor stuff like weddings? except the AF prob and DOF.. :bigeyes:

 

[limmatthias]

Yes, discontinued lens, but not up to par with the 50mm f1.4 counterpart, as many say...

yo! u have the proer one rite!!!

 

[doug3fflux]

wee... so its quite useful for indoor stuff like weddings? except the AF prob and DOF.. :bigeyes:

my opinion, indoor stuff like weddings may tend to get darker than expected, so bounce flash off the ceiling or something will be a good idea..cuz i wudent want to be using too high an ISO for any ocassion..and bounce flash retains most natural lighting if used correctly..

em, just a question, theres a diff btwn noise, and colour bleeding in a final picture? severe colour bleeding is caused by insufficient lens elements/groups to refract light.......? :think:

 

[Ah Pao]

em, just a question, theres a diff btwn noise, and colour bleeding in a final picture? severe colour bleeding is caused by insufficient lens elements/groups to refract light.......? :think:

Noise = [size=-1]Unwanted electronic or optical signals that cause interference in the reproduction of an image.

Colour bleeding = ? What you described sounds like chromatic abberation instead. Colour bleeding in an inkjet print is when ink spots on a paper diffuse into neighbouring spots, causing unintended mixing of colours.
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[doug3fflux]

Noise = [size=-1]Unwanted electronic or optical signals that cause interference in the reproduction of an image.

Colour bleeding = ? What you described sounds like chromatic abberation instead. Colour bleeding in an inkjet print is when ink spots on a paper diffuse into neighbouring spots, causing unintended mixing of colours.
[/size]

thanks for the link
so the red/green blur of colours in parts of the picture where there are single hues..is called CA? or is it just due to poor resolution..

 

[doug3fflux]

just read up on wiki the definition of CA...yeap that was what i was referring to..thanks anyway Ah Pao..

so fluorite, apo and basically lenses that have greater number of lens elements in groups give colours that are sharper/more saturated....?

 

[Firefox]

Think fastest lens is the f1.0 like the Leica 50mm f1.0 nocturnal. But I stand to be corrected. Believe there is a f0.8. Think it is a canon lens. Anyone?

The FD is a f0.95..

With a little cheating, there is, of course, the Carl Zeiss N-Mirotar 210mm f0.03 lense...