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Thread: Apature

  1. #151
    Join Date
    Dec 2006
    Location
    Melbourne, Australia
    Posts
    793
    The simplest way to prove your crazy theory to us Razr, would be to take a photo with a variable aperture lens (say f3.5-5.6) and take it at the telephoto end of the zoom and post the photo with exif intact and then you can show us how wrong the whole world is. If you're right then the aperture will be f3.5 even at the telephoto end of the zoom.
    Nikon D700 | SB600 | SB-80DX | 2xSB-26 | 18-35 f/3.5-4.5 | 24-85 f/3.5-4.5G | 50 f/1.4 G | 105 f/2.8 VR | 70-300 f/4.5-5.6 VR

    flickr

  2. #152
    Join Date
    Dec 2006
    Location
    God's Country - Australia
    Posts
    10,424
    i asked him to do that 6 pages ago. he won;t cos he doesn;t have a camera.
    D800e l V3 l AW1 l 16-35 l 35 l 50 l 85 l 105 l EM1 l 7.5 l 12-40 l 14 l 17 l 25 l 45 l 60 l 75
    flickr

  3. #153
    Join Date
    Dec 2006
    Location
    Melbourne, Australia
    Posts
    793
    Quote Originally Posted by Rooz View Post
    i asked him to do that 6 pages ago. he won;t cos he doesn;t have a camera.
    I see, well that's unfortunate. Where's the fun in that? I was looking forward to being able to shoot my 55-200 lens at f4 all the way until 200mm.
    Nikon D700 | SB600 | SB-80DX | 2xSB-26 | 18-35 f/3.5-4.5 | 24-85 f/3.5-4.5G | 50 f/1.4 G | 105 f/2.8 VR | 70-300 f/4.5-5.6 VR

    flickr

  4. #154
    Join Date
    Mar 2005
    Location
    Rochester,New York
    Posts
    464
    Quote Originally Posted by Razr View Post
    Only if you are in "P" (PROGRAM) or "A" (AUTOMATIC) modes.
    The aperture stays the same in "Av" and "M" (MANUAL) mode, no matter what focal length you choose, making any f/2.8-f4.5 etc. lens a "fast"-constant apeture lens throughout the zoom range.
    This is the dreaded misconseption that started all the discussion...I have shot thousands of pictures in AV mode with a variable aperture zoom lens and as you zoom out the lens stops down..the aperture gets smaller. Its just the way that a lens is made. It would happen in any mode..AV mode just lets you select a aperture from the camera body, it can't (and will not) lock the aperture. The thing that is changing the aperture is the turning of the zoom ring.
    Doug
    Pentax K200D,Pentax 18-250,Sigma 70-300 APO DG macro
    Kodak Z915
    http://picasaweb.google.com/pas49ras

  5. #155
    Join Date
    Jul 2005
    Location
    Sydney, Australia
    Posts
    4,428
    Why would anyone pay more for Sigma 18-50 F/2.8 (me included) if one can just use Sigma 17-70 F/2.8-4.5 and 'lock' it at F/2.8 throughout the zoom range?
    Maybe they don't know how to use A or M modes? LOL.
    I can't wait to see what 'thesis' he will come up tomorrow morning and prove it's all possible.
    Nikon D90, D80
    Nikkor 16-85mm AF-S DX F/3.5-5.6G ED VR, Tamron SP AF 28-75mm F/2.8 XR Di LD Aspherical (IF) macro, Nikkor 50mm F/1.4D, Nikkor 50mm F/1.8D, Nikkor AF-S VR 70-300mm F/4.5-5.6G IF-ED, Sigma 105mm F/2.8 EX DG Macro ||| 2x SB800 | SB600 ||| Manfrotto 190XB

  6. #156
    Join Date
    Dec 2006
    Location
    So Calif
    Posts
    3,226
    I've already asked Jeff to close this thread about 4 pages back. I hope he will.

    I suggest 2 things:

    1. No one post another comment in this thread. We are wasting our time with someone who will never learn, nor wants to.

    2. No one ever respond to RAZR in any other thread - ever.

    Do not reply. Ever!
    Pentax K20D/K5/15/21/40/70/10-17/12-24, Sigma 17-70 2.8-4.5/150-500, Tamron 90 Macro/70-200 2.8, Canon SX20 IS/Elph 500HS
    (formerly Pentax 50 1.4/50-200/55-300/K100D, Sigma 18-50 2.8/70-300 APO, Tamron 28-75, Viv 800, Tele-Tokina 800, Canon S3 IS, Samsung L210)
    http://s133.photobucket.com/albums/q78/KylePix/

  7. #157
    Join Date
    Mar 2007
    Location
    Bay Area, California
    Posts
    1,546
    Quote Originally Posted by SpecialK View Post
    I suggest 2 things:

    1. No one post another comment in this thread. We are wasting our time with someone who will never learn, nor wants to.

    2. No one ever respond to RAZR in any other thread - ever.

    Do not reply. Ever!

    Oh your taking all the fun out of the internet.. Get real!
    Nikon D90, D40 Tamron 17-50mm f/2.8 | Sigma 50-150mm f/2.8 | Nikkor 35mm f/1.8
    Vertical Grip, SB-600, SB-24, Sunpak 433D, Metz 40AF-4N, Alienbees CyberSync Triggers

    R3G Media | Flickr

    "You're pulling some awesome action shots with a cam and lens that are supposed to be rubbish ! " - Rooz

  8. #158
    Join Date
    Mar 2007
    Posts
    1,923
    That's right r3g!

    It's funny how he seems to think there's a magic way of getting large-apertures out of variable-aperture lenses... as if no one else had figured out such an important concept, and weren't all using their 17-70mm f/2.8-4.5's for kicker cheap macro lenses at 70mm f/2.8.

    It's true, though, the insults have gotten out of hand. Calling Razr all sorts of (apt) names isn't going to make him listen up.

    But it's certainly been a chuckle or three. Makes little ol' DSLR-newcomer me feel all knowledgeable.
    Nikon D40 + kit lens

    Nikkor 50mm f/1.8 D AF(...or not)

  9. #159
    Join Date
    Oct 2006
    Posts
    461
    Quote Originally Posted by tim11 View Post
    NO. YOU ARE WRONG. At full zoom of the lens in question (ie. sigma 17-70 f/2.8-4.5) only F/4.5 is available.

    You are a bigger idiot than I previously thought you were since you keep denying you are wrong.
    I'll report you for your insult.

  10. #160
    Join Date
    Dec 2004
    Location
    Charleston, SC
    Posts
    2,364
    Quote Originally Posted by SpecialK View Post
    I've already asked Jeff to close this thread about 4 pages back. I hope he will.

    I suggest 2 things:

    1. No one post another comment in this thread. We are wasting our time with someone who will never learn, nor wants to.

    2. No one ever respond to RAZR in any other thread - ever.

    Do not reply. Ever!
    I blocked him a while ago and then was excited to hear Razr was banned, apparently it was a temporary ban. He needs to be PERMANENTLY BANNED.

    He is a troll--no doubt about it.

    BTW, it's good to know that my Sigma 70-300 f/4-5.6 is really a 70-300 f/4 in Av mode!
    Whoopee, who needs a Sigma 100-300 f/4 when I can have a Razr version of the 70-300 with f/4 for 1/4 the cost!!
    US Navy--Hooyah!

    Nikon D700/D300|17-35 f/2.8, 24-70 f/2.8, Sigmalux, 80-200 f/2.8, 16 f/2.8 fisheye,

    Lots of flashes and Honl gear.

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