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03-02-2010, 07:48 PM   #31
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QuoteOriginally posted by RioRico Quote
C'mon now, it ain't really a 35-420 -- that's the 35mm EQUIVALENT. The lens is really less than 1/10 that -- 3.45-41.4mm -- and at f/1.5-2.8, that's actually kind of slow. An f/1 of that size shouldn't be hard to make, nor be a behemoth. Has Leicasonic gone lazy?

That Sigma is a real pig. Where do I buy the slave(s) to schlep it around? I'd like to have the Zoomatar, get a tilt-shift adapter for my K20D, work it out. It would be the only one on the block, for sure.
Get real, did YOU really think it was a true 35-420mm F1.5-2.8 lens on a 3 chip HD camcorder ? BTW show me a link to another 1080p 60fps 3 chip camcorder with 12x wide angle F1.5/2.8 zoom lens. So YOU think F1.5 is slow, show me an HD camcorder with a faster lens.


Last edited by jogiba; 03-02-2010 at 08:07 PM.
03-02-2010, 08:20 PM   #32
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QuoteOriginally posted by jogiba Quote
Get real, did YOU really think it was a true 35-420mm F1.5-2.8 lens on a 3 chip HD camcorder ? BTW show me a link to another 1080p 60fps 3 chip camcorder with 12x wide angle F1.5/2.8 zoom lens. So YOU think F1.5 is slow, show me an HD camcorder with a faster lens.
It was presented as 35-420mm, no quibbles.
I don't track camcorders so I'll show you nothing.

And I was speaking of the optical possibilities, not the crippled (cheap) optics that vidcam makers put on their products. A lens with maximum FL of ~40mm would only need a front objective of that size to reach f/1. Perhaps someone here with more knowledge of lens design could tell us whether such a 12x zoom is feasible. And remember than cine/vid lenses rarely (if ever) match the IQ of still lenses. With moving images, sharpness simply isn't critical.
03-03-2010, 03:16 AM   #33
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QuoteOriginally posted by RioRico Quote
It was presented as 35-420mm, no quibbles.
I don't track camcorders so I'll show you nothing.

And I was speaking of the optical possibilities, not the crippled (cheap) optics that vidcam makers put on their products. A lens with maximum FL of ~40mm would only need a front objective of that size to reach f/1. Perhaps someone here with more knowledge of lens design could tell us whether such a 12x zoom is feasible. And remember than cine/vid lenses rarely (if ever) match the IQ of still lenses.
With moving images, sharpness simply isn't critical.
Exactly. We should really leave cine/video lenses out of this discussion, as they are much lower quality in almost any aspect, than still image lenses.

Ben
03-03-2010, 08:50 AM   #34
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QuoteOriginally posted by Ben_Edict Quote
Exactly. We should really leave cine/video lenses out of this discussion, as they are much lower quality in almost any aspect, than still image lenses.

Ben
Get a clue.


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03-03-2010, 10:06 AM   #35
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QuoteOriginally posted by jogiba Quote
Get a clue.

You see, the point is, that the thread opener seemed (though I admit, he did not write that expressedly) to want to know about photographic lenses -
that has been indicated by his choice of comparisson examples. Video/cine lenses are simply very, very different.

We will find the famous exception to the rule in almost any discussion. But this is clouding the general picture, as I see it. This is just my personal opinion.

If we search long enough, we will certainly find lots more exotic lenses for exorbitant prices. Would that provide the answer, the thread opener was seeking?
I doubt that very much. Also, the lower row of examples you showed are no zoom lenses, but primes

I would prefer to establish another thread, like "extreme lenses for any purpose". We could then include all those rare military or whatever optics,
which defy all common sense, both ion specs and in price.

I'll give that a start with my Odelka 6x6 square medium format camera, which is 300mm fl at f/1.0…

Ben
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