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Thread: Teleconverter

  1. #1
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    Default Teleconverter

    Hi Newbie here

    Just bought a TC 1.4x from MS Color - I wanted to increase my 300m zoom without burning my pocket.

    When speaking to the shop, he said something that puzzeled me, he said :
    TC 2x for 300m is = 900m

    I thought it would be 600m. Who's correct, not sure?

    Also, after buying the TC 1.4x from him, he said I must reduce 2 f stops - how do I do that, the AF works, but how do I reduce the f stops. Is it on the lens or on the camera. By the way I use a D70 with a Tokina 30 - 300m zoom.

    I also saw him doing some calculation, like multiply by 44, then he gave me some number? er... really blur.

    Can anyone help me solve this. Thank you

  2. #2
    Senior Member
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    Default Re: Teleconverter

    He probably thinks that you use a digital camera and multiply the 300mm by 1.5 and again by 2 to give you 900mm equivalent of 35mm format

    Quote Originally Posted by Darren Nonis
    Hi Newbie here

    Just bought a TC 1.4x from MS Color - I wanted to increase my 300m zoom without burning my pocket.

    When speaking to the shop, he said something that puzzeled me, he said :
    TC 2x for 300m is = 900m

    I thought it would be 600m. Who's correct, not sure?

    Also, after buying the TC 1.4x from him, he said I must reduce 2 f stops - how do I do that, the AF works, but how do I reduce the f stops. Is it on the lens or on the camera. By the way I use a D70 with a Tokina 30 - 300m zoom.

    I also saw him doing some calculation, like multiply by 44, then he gave me some number? er... really blur.

    Can anyone help me solve this. Thank you

  3. #3
    Moderator ortega's Avatar
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    Default Re: Teleconverter

    Quote Originally Posted by Darren Nonis
    Hi Newbie here

    Just bought a TC 1.4x from MS Color - I wanted to increase my 300m zoom without burning my pocket.

    When speaking to the shop, he said something that puzzeled me, he said :
    TC 2x for 300m is = 900m

    I thought it would be 600m. Who's correct, not sure?

    Also, after buying the TC 1.4x from him, he said I must reduce 2 f stops - how do I do that, the AF works, but how do I reduce the f stops. Is it on the lens or on the camera. By the way I use a D70 with a Tokina 30 - 300m zoom.

    I also saw him doing some calculation, like multiply by 44, then he gave me some number? er... really blur.

    Can anyone help me solve this. Thank you
    should be 300mm + X2TC = 600mm x 1.5 crop factor = simulated 900mm

    and let the camera work out the exposure compensation since the metering is TTL

  4. #4
    vince123123
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    Default Re: Teleconverter

    first, i think the correct one should be 'open" and not reduce the f stop. second its 1 f stop and not 2 for a 1.4x.

    What this means is that the TC1.4x "sucks" up 1 stop of light (ie everything is dimmer) and you need to give a bigger F stop to maintain the exposure.

    However, if you're using a D70, as suggested by Ortega, just let the camera do the metering..

    Quote Originally Posted by Darren Nonis
    Hi Newbie here

    Just bought a TC 1.4x from MS Color - I wanted to increase my 300m zoom without burning my pocket.

    When speaking to the shop, he said something that puzzeled me, he said :
    TC 2x for 300m is = 900m

    I thought it would be 600m. Who's correct, not sure?

    Also, after buying the TC 1.4x from him, he said I must reduce 2 f stops - how do I do that, the AF works, but how do I reduce the f stops. Is it on the lens or on the camera. By the way I use a D70 with a Tokina 30 - 300m zoom.

    I also saw him doing some calculation, like multiply by 44, then he gave me some number? er... really blur.

    Can anyone help me solve this. Thank you

  5. #5
    Member
    Join Date
    Sep 2004
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    Rivervale
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    Default Re: Teleconverter

    Thanks guys for your replies, real helpful. Good thing that the D70 helps me in the metering. Great. Thanks again

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