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Zoom lens apertures

Discussion in 'Help Team' started by 0, Apr 15, 2003.

  1. huwevans

    huwevans Not Really Here

    Re: Zoom lens apertures/not exaclty constant!

    Well I know nothing about those particular lenses, but surely you cannot put a 35-350mm zoom in the 'high-end' category? So called 'super-zooms' are always an horrendous compromise. Optically speaking you simply cannot design a single set of elements to give good correction of aberrations over such an enormous and conflicting range of focal lengths. The quality of these lenses is inevitably second rate, at best. A 100-400mm should be a better proposition though.

    Huw Evans.
    www.huwevans.freeuk.com
     
  2. Done_rundleCams

    Done_rundleCams AP Forum Ambassador to Canada

    Re: Zoom lens apertures/not exaclty constant!

    "Canon 35-350 F4.5-5.6, 100-400 F4.5-5.6 "

    Morning Burgy,

    Sadly, yes they are variable aperture. Just by the numbers at the end of
    the focal length. If you put a 35-350 at 35mm@4.0 and then zoom the lens
    out to 350mm you will see the aperture change (in the LCD/viewfinder) as the
    lens zooms. This is done easiest when the camera is in AP mode. However, if
    using your EF70-200/2.8 lens, or any constant aperture lens, and do the same
    thing the Aperture will not change as you zoom the lens out...the shutter speed
    may change if the exposure value changes during the zooming process. Gee, my
    brain hurts now as I haven't been that techinal for a long time/img/wwwthreads/smile.gif.

    /img/wwwthreads/smile.gif

    Jack

    PS: presuming your weren't being facetious.
    It's amazing what one can do when one doesn't know what one is doing!/img/wwwthreads/wink.gif
     
  3. Burgy

    Burgy In the Stop Bath

    Re: Zoom lens apertures/not exaclty constant!

    "surely you cannot put a 35-350mm zoom in the 'high-end'"

    Actually yes I would, the performance of the lens is remarkable, and I have seen tranny's shot with this (OHH why did I have to say that, cue Will) that are very impressive, as the design is also over ten years old and and it was the first 35mm 10x zoom, and still has an RRP of over £1500. I would say it is very much a top end zoom. I used a 35-350 and would recomend it to anyone wanting a portable outfit along with a 16-35mm.

    The 100-400LISUSM is also superb, like the 35-350L it is a little ponderous in low light, but again very impressive.

    Burgy

    Its not what you've got, its who you do it to. http://www.pressfotos.co.uk
     
  4. Burgy

    Burgy In the Stop Bath

    Re: Zoom lens apertures/not exaclty constant!

    I know, thanks Jack

    Burgy

    Its not what you've got, its who you do it to. http://www.pressfotos.co.uk
     
  5. Larry Shone

    Larry Shone Well-Known Member

    Re: Zoom lens apertures/not exaclty constant!

    and how much would we expect to pay for a 35-350? Sounds quite a tempting lens!

    I will be rich and famous one day, just not today!
     
  6. BigWill

    BigWill Gorgeous oversensitive Nikon-loving cream puff

    Re: Zoom lens apertures/not exaclty constant!

    You don't want to know Larry! Sit down before I tell you! £1749.90 if you buy it new from Jessops!

    BigWill

    <font color=blue>I'm sailing like a driftwood on a windy bay!<font color=black>
     
  7. Larry Shone

    Larry Shone Well-Known Member

    Re: Zoom lens apertures/not exaclty constant!

    i think i'll get 2 then, in case one gets dirty when im on safari in Kenya!

    I will be rich and famous one day, just not today!
     
  8. BigWill

    BigWill Gorgeous oversensitive Nikon-loving cream puff

    Re: Zoom lens apertures/not exaclty constant!

    How true Larr old boy, it's such a pain when one gets dust on the front element and one is forced to have Jeeves remove it while one uses the "spare" 35-300! /img/wwwthreads/smile.gif

    BigWill

    <font color=blue>I'm sailing like a driftwood on a windy bay!<font color=black>
     
  9. Larry Shone

    Larry Shone Well-Known Member

    Re: Zoom lens apertures/not exaclty constant!

    i tell you what old chap, i wouldnt mind the 300mm telephot that i spotted on Ebay attached to a Pentax ME. It would fit nicely on my cosina allowing me to sell on the ME.Talking of Pentaxes, i nearly choked on me cuppa last night when i spotted an MX for £65! If only that had been around when i bought the cosina!!

    I will be rich and famous one day, just not today!
     
  10. BigWill

    BigWill Gorgeous oversensitive Nikon-loving cream puff

    Re: Zoom lens apertures/not exaclty constant!

    Console yourself with the thought that it was probably as rough as a badgers arse at that price Larry!

    BigWill

    <font color=blue>I'm sailing like a driftwood on a windy bay!<font color=black>
     
  11. BigWill

    BigWill Gorgeous oversensitive Nikon-loving cream puff

    For instance.........

    ......this one is going for £129.00 on Ffordes and it's only "Exc plus" condition!

    [​IMG]

    BigWill

    <font color=blue>I'm sailing like a driftwood on a windy bay!<font color=black>
     
  12. Larry Shone

    Larry Shone Well-Known Member

    Re: Zoom lens apertures/not exaclty constant!

    you reckon? Was the MX a pro camera then, i thought it was an amateur version of the LX

    I will be rich and famous one day, just not today!
     
  13. Larry Shone

    Larry Shone Well-Known Member

    Re: For instance.........

    nice, why dont they make em like that anymore(Helen thinks, ugly bloody camera!)/img/wwwthreads/wink.gif

    I will be rich and famous one day, just not today!
     
  14. huwevans

    huwevans Not Really Here

    Re: Zoom lens apertures/not exaclty constant!

    Well that is certainly a high-end price! What is the distortion like?

    Huw Evans.
    www.huwevans.freeuk.com
     
  15. huwevans

    huwevans Not Really Here

    Re: Zoom lens apertures/not exaclty constant!

    It didn't have any particular relation to the LX that I can recall. I do seem to remember it took a proper motor drive (not just an auto-winder), which in those days usually marked something out as having professional aspirations. But at the same time it wasn't really a full system camera as the LX, or Nikon F2, or Canon F1 were.

    Didn't Jack use several of them for PJ work?

    Huw Evans.
    www.huwevans.freeuk.com
     
  16. Burgy

    Burgy In the Stop Bath

    Re: Zoom lens apertures/not exaclty constant!

    I wouldn't use it for architectural work (but then that's not what it was designed for it has a little barrel one end and pincushion the other , but is only a little), but it was very capable, very sharp, and very punchy, a little prone to flare at the long end, (well with a petal hood that was designed for the 35mm end not very surprising) ideal for doing court snatches, from a full length to a tight head in one movement.(dont even think about it Will!!!)



    Its not what you've got, its who you do it to. http://www.pressfotos.co.uk
     
  17. Larry Shone

    Larry Shone Well-Known Member

    Re: Zoom lens apertures/not exaclty constant!

    ideal for doing court snatches, from a full length to a tight head in one movement.(dont even think about it Will!!!)


    "i'll have order in my court, and please refrain from poking that thing at the defendant's cleavage"

    I will be rich and famous one day, just not today!
     
  18. Burgy

    Burgy In the Stop Bath

    Re: Zoom lens apertures/not exaclty constant!

    no relation to the LX at all. but I think it did also have interchangable screens, and you are right Huw, a 5 FPS motordrive was also available as well as the 2FPS winder. To small for my hands, even with the Motordrive fitted, but a nice mechanical camera.

    Burgy

    Its not what you've got, its who you do it to. http://www.pressfotos.co.uk
     
  19. BigWill

    BigWill Gorgeous oversensitive Nikon-loving cream puff

    Re: Zoom lens apertures/not exaclty constant!

    "a tight head".......well I was just thinking you were talking about photographing a prop forward at rugby! /img/wwwthreads/smile.gif

    BigWill

    <font color=blue>I'm sailing like a driftwood on a windy bay!<font color=black>
     

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