Dos Questionos

Ok here goes a couple questions (somewhat related) that may be hard to ask but I will do my best to be clear.

First off, when I talk about “quickness” of a lens, below, I’m ONLY referring to its speed when shutter opens and closes, not to the lens’ focusing speed.

#1. Is every lens created equal? In terms of speed, will every lens open and close its shutter at the same exact velocity considering they are both set to the same exact aperture number (and other things also being equal)? I ask this because I have a prime lens and I feel like it is quicker than my zoom lens even at similar apertures.
Bonus question: does the camera type (cropped or full frame) make any difference (again relating to speed still)?

#2. Is a lens quicker if it is set to a wide angle? For example will my 24-60 be quicker at 24mm than at 60mm. OR would a 10-20mm be quicker than a 24-60mm just because of the angle it covers?

Gracias amigos!

The lens doesn't have a shutter. The camera body does. I'd be very surprised if focal length has anything to do with how quickly the camera takes the picture.

What Dave says is true, the shutter is in the camera. Now, if you switch shutter speed with how quickly the aperture of the lens "clicks" to a given aperture setting, that's a different question. I don't have an answer to that -- there are various factors that make some lenses seem more responsive than others, but I haven't seen technical discussions around "aperture speed".

I would think that the aperture will react faster than the focus mechanism, so any "speed" differences between lenses would be due to focus speed.

Sounds like you're confusing what speed means when it's used to describe a lens. When you say a lens is fast, what you're really saying is that it has a wider maximum aperture that(and this is the important part) enables you to have a faster shutter speed.

The wikipedia article does a good job of explaining all of this:
http://en.wikipedia.or​g/wiki/Lens_speed

What dave_p said. I think you're confused about the shutter. The camera shutter will open and close exactly as quickly as the shutter speed you set regardless of the lens that's attached (assuming the camera is operating correctly of course). The lens has a diaphragm, which you can think of more like your eye's pupil. It will open or partially close (a.k.a. "stop down") according to the aperture you set. When you're looking through the viewfinder, this it's generally going to be fully open, and then it will stop down as required just before the camera shutter opens to take the picture.

I think what your noticing may be because the camera is in an automatic mode, and the camera is choosing the shutter speed. Theoretically, under the same lighting and same f-number, you should get the same shutter speed from both lenses. If, however, the lenses are set to different focal lengths, there's a good chance the light metering is going to be different. Realize the camera's light sensor assumes the world is 18% grey. Let's say you have a 50mm prime that where you have a black object in the middle, but light colors all around it. If you're in a metering mode that's averaging the entire scene, you're going to get a shutter speed based on some mid-tone between the light and the dark parts of the scene. Now, let's say you replace the 50mm with your 70-200 zoom, which is set to 100mm focal length. Now, that dark object is occupying most of the frame, and the camera is going to meter it differently, giving you a different (in this case, longer) shutter speed.

Hopefully, that helps and didn't either confuse you even more or insult your intelligence.

Errm, I think the confusion may be due to the camera system the OP is using. He may not be the one who is confused here.

I noticed the OPs user name, which suggests he is using a Mamiya MF system which DOES have leaf shutters in the lenses.

Unfortunately Luis, I think you are asking on the wrong forum as this is essentially a forum for Canon users, so you may have trouble finding someone with the knowledge you need. Maybe look for a forum where the MF users hang out?

sandpiper- Canon here. But yeah thanks.

Thank you all for your redundant ( but necessary ) replies
...It was a blond moment i must admit guys--AND I"M MEXICAN!

But I mean even though the answer must be NO, my question should have been Does the aperture of a particular lens affect the shutters speed of a camera differently than a totally different lens would? (Of course everything being equal for both shots taken with both lenses on the same exact camera ( f #, iso, light, etc.) )