Digital cameras: is holding out for a high optical zoom (above the standard 3x) worth it?

[Sid59]

Originally posted by: Zenmervolt

Originally posted by: Sid59

Originally posted by: Zenmervolt

Originally posted by: Sid59
large zooms are nice when it's extremely sunny out to suppor the small apeture.

Not a smaller aperture. A higher F-Stop. F-Stop is a ratio between focal length and aperture. For a given aperture opening, a longer focal length creates a higher F-Stop.

ZV

i've gotta think about it again. but i was taught that aperture and fstop are interchangable terms. just like ISO and ASA.

I might be wrong but I thought that while aperture and F-Stop both had to do with the size of the iris, but the aperture was the absolute iris diameter and F-Stop is the ratio of absolute iris diameter and focal length.

ZV

ok i think i figured out what bothered me about the oringal post you posted from me.

all regular lens have a fixed focal length. only lenses than have variable focal lengths are those that are telephoto or of the simialr vein. The lenses that can change from Xmm to XXmm.

 

[Lars]

Originally posted by: Ornery
you must have a very long lens. or trained squirrels

• ...or it's cropped.

The squirrel pic was not cropped , just resized. My Sigma lens was at full zoom (300mm which equals 300mm x 1.6 = 480mm on the DRebel).

 

[Ornery]

• Definitely worth a buck and a half!

 

[ElFenix]

Originally posted by: Ornery
you must have a very long lens. or trained squirrels

• ...or it's cropped.

cheating!

 

[ElFenix]

Originally posted by: Sid59

ok i think i figured out what bothered me about the oringal post you posted from me.

all regular lens have a fixed focal length. only lenses than have variable focal lengths are those that are telephoto or of the simialr vein.

oh really?

 

[Anubis]

Originally posted by: ElFenix

Originally posted by: Sid59

ok i think i figured out what bothered me about the oringal post you posted from me.

all regular lens have a fixed focal length. only lenses than have variable focal lengths are those that are telephoto or of the simialr vein.

oh really?

personally i like this one and

this one

 

[Zenmervolt]

Originally posted by: Sid59

Originally posted by: Zenmervolt

Originally posted by: Sid59

Originally posted by: Zenmervolt

Originally posted by: Sid59
large zooms are nice when it's extremely sunny out to suppor the small apeture.

Not a smaller aperture. A higher F-Stop. F-Stop is a ratio between focal length and aperture. For a given aperture opening, a longer focal length creates a higher F-Stop.

ZV

i've gotta think about it again. but i was taught that aperture and fstop are interchangable terms. just like ISO and ASA.

I might be wrong but I thought that while aperture and F-Stop both had to do with the size of the iris, but the aperture was the absolute iris diameter and F-Stop is the ratio of absolute iris diameter and focal length.

ZV

ok i think i figured out what bothered me about the oringal post you posted from me.

all regular lens have a fixed focal length. only lenses than have variable focal lengths are those that are telephoto or of the simialr vein. The lenses that can change from Xmm to XXmm.

That doesn't change the fact that F-Stop and aperture are not technically interchangeable. The aperture for F2.8 on a 55 mm lens is different than the aperture for F2.8 on a 60 mm lens even if both lenses are fixed focal length.

ZV

 

[ElFenix]

Originally posted by: Anubis

personally i like this one and

this one

both nice, but the second is a prime lens 😉

 

[Zenmervolt]

Originally posted by: Anubis

Originally posted by: ElFenix

Originally posted by: Sid59

ok i think i figured out what bothered me about the oringal post you posted from me.

all regular lens have a fixed focal length. only lenses than have variable focal lengths are those that are telephoto or of the simialr vein.

oh really?

personally i like this one and

this one

I've always preferred lenses from Carl Zeiss.

ZV

 

[Sid59]

Originally posted by: ElFenix

Originally posted by: Sid59

ok i think i figured out what bothered me about the oringal post you posted from me.

all regular lens have a fixed focal length. only lenses than have variable focal lengths are those that are telephoto or of the simialr vein.

oh really?

i don't get what the purpose is? i mean similar vein, which was to include the wide angles that slide into different mms.