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tomascastelazo

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Posts posted by tomascastelazo

  1. <p>I got my first Koni about a 2 months ago... I now have a Rapid M and an M, plus the 60, 90 and 180 lenses.<br>

    Shot my first test roll and loved it... Tomorrow I am taking it out for a long early morning walk.<br>

    I have a full RB system, which I love, but the handiness of this system is great.</p>

  2. JC Uknz,

    <p>

    Thanks for your reply.

    <P>

    I appreciate the link! One of those jewels hard to fnd on the net!

    <p>

    Now, I embrace ditital media, but what can I say? I like toys! Also, I have a bunch of really great lenses and I think it is a shame to let them collect dust, etc.

    <p>

    Yesterday I ran a home-test of my canon lenses vs the Zeiss planar and just visually on the camera screen, it beats the canons hands down. Much better contrast and sharpness, really evident.

    <p>

    The 135 Takumar was also a bit better than the canons.

    <p>

    I will run a series of comparison tests soon and hope to post them here for everyone?s benefit.

  3. Kari

    <p>

    Basically I am interested in knowing/comparing sharpness, color rendition, contrast, etc. and experiences of people who have used both lenses. I am just getting into it. So far with the lenses that have, I am happy with results, but I don?t know if it is the novelty of it, or there are true benefits of using those great old lenses on digital bodies.

    <p>

    For example, the Zeiss Planar 50mm gives me a very sharp, creamy feel, different colors than my 28-135 IS, for example.

    <p>

    The link that Rainer provided answered a lot of questions that I had, my remainng doubt is about the chromatic aberration attributed to analog lenses, about light not falling perpendicular to the lens, uneveness of exposure due to the supposed angle of incidence, etc. I want to know if these arguments are true, and if so, what focal lengths are more prone to the aberrations or create uneven exposure, etc.

    <p>

    Tomas

  4. Ok folks, it turns out that my "new" interest is on using what has become known

    as "analog" lenses.

    <p>

    I've read a bunch of things about both lenses being different. And here is where I

    need help from

    <p>

    a) knowledgeable people technically speaking, without a lot of story to the

    answers and

    <p>

    b) knowleadgable people practically speaking without a lot of story to the answers.

    <p>

    So the questions are:

    <p>

    1. How true it is what is said about "digital lenses" focusing on the sensor in a

    much perpendicular manner as opposed to "analog lenses" having a light

    incidence of greater degree and thus affecting image quality?

    <p>

    2. With the smaller chip, due to the circle of coverage, the "analog lenses"

    become a relatively longer lens in digital cameras (I accept and understand this),

    however, what happens to the Depth of Field? A wide angle has ample DOF, at full

    use of image circle. When the usable area is reduced, to an equivalent, lets say,

    of a 50mm (35mm analog converts to 52mm aprox in digital), does the ample DOF

    characteristics are retained despite the fact that the effective area of coverage is

    that of a longer lens? Another example... an 80mm lens in analog photography

    has nice bokeh, different than what a 50mm lens would yield, but when I use a

    50mm lens in a digital camera and it turns in effect into an 80mm equivalent, will I

    get the same bokeh?

    <p>

    3. I have bought from ebay a series of Takummars screw mount to use on my

    canon 20d. They are a 35mmm f2.5, a 105 2.5, a 135 3.5. I also have two Tamrons

    SPs, a plastic fantastic 100mm vivitar macro, a Zeiss planar t, 50mm 1.4. Has

    anybody has an experience using these lenses on digital cameras?

    <p>

    I already have some in my possession, and they definitely render something

    different than the canon lenses I have. But since I do not have the equivalent in

    canon lenses, I cannot compare.

    <p>

    Can anyone share some real life experiences with these lenses?

    <p>

    Thanks!

    <p>

    Tomas

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