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  1. #11

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    I don't know of any chart but you can measure it yourself.

  2. #12

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    The old lens reviews listed the T-number of the lenses. In this page a Rokkor 50mm f1.4 with a T-number 1.53, 28mm f2.0 with a T-number 2.25 and a 135mm f2.8 with a T-number 3.11. In these examples it doesn't seem significantly off.


  3. #13

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    Quote Originally Posted by Les Sarile View Post
    The old lens reviews listed the T-number of the lenses. In this page a Rokkor 50mm f1.4 with a T-number 1.53, 28mm f2.0 with a T-number 2.25 and a 135mm f2.8 with a T-number 3.11. In these examples it doesn't seem significantly off.
    Les, you have the small child's concept of old.

  4. #14

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    Quote Originally Posted by MattKing View Post
    The difference is usually small, and generally only relevant in the exacting circumstances of motion picture work.
    Usually small? Perhaps, but not always. Consider the 8-64/1.9 Angenieux 8x8B as was supplied with the Beaulieu 4008ZM. It t stops around t/3.3. Mine taught me to check all of my cine camera zooms for transmission, against the evil day when the camera's on-board meter failed.

  5. #15

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    This brings back the old discussion of full aperture metering vs. stop down metering. Some people thought stop down metering was more accurate because it measured the light coming through the lens rather than the setting based on the f/stop set on the lens. Full aperture metering has been around for a long time. Some cameras had it earlier than others. The Minolta SRT-101 had it in 1966. The Konica Autoreflex T had it in 1968. The Canon F-1 and FTb cameras had it in 1971. Pentax did not have it until the ES of 1971. Before the Micro Nikkor P Nikon made the 55/3.5 Micro Nikkor Auto which had a mechanical exposure compensation in the close-up range. This made things easier for someone who was using a separate meter and wanted to get proper exposure up close. To use it with a camera with TTL metering you would need to stop down to meter. If you are using a camera like the Minolta X-700 and are set to aperture priority, the camera will read the actual amount of light coming through the lens and will not depend only on the f/stop the lens is set at. Your finder may show a shutter speed of 1/250 but the actual shutter speed at the moment of exposure may be faster or slower than that. This would cancel out any minor differences between the marked f/stop and the actual T stop.

  6. #16
    StoneNYC's Avatar
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    Is there any database online of legacy lens T-stop ratings?

    Quote Originally Posted by Dan Fromm View Post
    Les, you have the small child's concept of old.
    Perhaps you're just ancient... The fact it's written on paper in a magazine means its old... Hehe


    ~Stone

    Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1, 5DmkII / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic | Sent w/ iPhone using Tapatalk
    ~Stone | "...of course, that's just my opinion. I could be wrong." ~Dennis Miller

  7. #17

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    Quote Originally Posted by StoneNYC View Post
    Perhaps you're just ancient... The fact it's written on paper in a magazine means its old... Hehe


    ~Stone

    Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1, 5DmkII / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic | Sent w/ iPhone using Tapatalk
    No, no, no. The fact that it's in a magazine means it's not old. If it was on a parchment scroll, it'd be old.

    Let's keep some perspective here.

  8. #18

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    I've seen T stops used with view cameras when large extensions were used (close-ups).

  9. #19
    StoneNYC's Avatar
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    Is there any database online of legacy lens T-stop ratings?

    Quote Originally Posted by E. von Hoegh View Post
    No, no, no. The fact that it's in a magazine means it's not old. If it was on a parchment scroll, it'd be old.

    Let's keep some perspective here.
    In this world older than 10 years is old... I was driving these kids in a car that was 7 years old and they said "wow this car is so old look at all the knobs and buttons!" Because their patents owned a new car with touch panel displays etc.

    It's a new generation and everything is fast and obsolete or rather


    ~Stone

    Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1, 5DmkII / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic | Sent w/ iPhone using Tapatalk
    ~Stone | "...of course, that's just my opinion. I could be wrong." ~Dennis Miller

  10. #20

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    Quote Originally Posted by StoneNYC View Post
    In this world older than 10 years is old... I was driving these kids in a car that was 7 years old and they said "wow this car is so old look at all the knobs and buttons!" Because their patents owned a new car with touch panel displays etc.

    It's a new generation and everything is fast and obsolete or rather


    ~Stone

    Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1, 5DmkII / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic | Sent w/ iPhone using Tapatalk

    Yep. Their loss, my gain.

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