Why does the iris close when i zoom in>?

Re: Why does the iris close when i zoom in>?

LOL :D

I swear, the tech talk makes me hurt. I long for the day I can just direct and let my DP worry about the shite

LOL
 
Re: Why does the iris close when i zoom in>?

Its very interesting. I just bought a new digital camera (Panasonic Lumix DMC-FZ10) and it has a huge Leica 12x lens... (it even uses 72mm threads like the DVX) Funny thing is, the lens carries the F2.8 throughout the entire range of the lens.. good work panasonic.
 
Re: Why does the iris close when i zoom in>?

Jarred - would you post a review of that (Panasonic still) camera? I was considering it or the Canon Digital Rebel.
 
Re: Why does the iris close when i zoom in>?

funny.. as I was too debating the digital rebel as well. I went with the panasonic because the lens blows away the canon's... I never need more than the 400+mm lens so lens change doesnt bother me. Also the lens is optically stabilized just like the DVX. For me to buy a stabalized lens for the Digital rebel I woulda had to pay more for the lens than the entire panasonic camera.

And Its metal vs. the canon's plastic. Also with the 72mm filters I can use polarizers etc from my DVX. AND, it has a HD frame mode that takes 16x9 HD ratio stills.. no cropping it actually lays down a 16x9 HD frame. Good stuff I tell you.
 
Does anyone know of a 72mm adapter to the bayonet mount that Century uses for its 0.6X Wide-Angle adapter?
 
Zoomforce said:
funny.. as I was too debating the digital rebel as well. I went with the panasonic because the lens blows away the canon's... I never need more than the 400+mm lens so lens change doesnt bother me. Also the lens is optically stabilized just like the DVX. For me to buy a stabalized lens for the Digital rebel I woulda had to pay more for the lens than the entire panasonic camera.

And Its metal vs. the canon's plastic. Also with the 72mm filters I can use polarizers etc from my DVX. AND, it has a HD frame mode that takes 16x9 HD ratio stills.. no cropping it actually lays down a 16x9 HD frame. Good stuff I tell you.
Click to expand...

I suppose for a given definition of "blows away" you are correct. These cameras are not even really in the same league. The Pana may be able to shoot a 16X9 with no cropping on the users part, but it has a 4mp sensor that is probably smaller than the fingernail on your pinky, VS the Digital Rebel which has a 6mp (or 8MP on the xt i believe) APS sized sensor that is larger than a postage stamp. It is basically the same deal as the Canon XL2 being able to shoot "native" 16X9 video, but it is using a fractional part of the CCD to achieve this effect. The end result is lower resolution. If you want to be able to achieve shallow DOF (for example) then you need a larger format, like the Digital Rebel. You can be sure that a lens that is as small as the one on that Panasonic camera and offers such a fast lens and large zoom range means that the camera has a very tiny sensor.

As a little aside on the original topic of the thread, you really have to pay big $$ to get zoom lenses that have a fixed aperture over their entire range, at least in 35mm format.

Compare this: Canon EF 28-90mm f/4-5.6

to this: Canon EF 24-70 2.8L


Aside from being over $1000 more expensive the 24-70 2.8L is a heavy beast. With the hood on it is basically the same size as my 300 F4L and will definately scare small children :) I would also note that that Canon "L" lenses are almost always at least 77mm (big huge heavy lenses). It requires a lot more optics and a lot more glass to capture the needed light to have a really fast zoom that works across a given aperture.
 
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