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  1. #11
    Poisson Du Jour's Avatar
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  2. #12
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    Quote Originally Posted by Poisson Du Jour View Post
    These babes go for around $1,600 ~ $2,000 NIB from Japan. They are a good go-between from 55mm to 90mm; the focal length is about right with neither too wide nor too compressed.
    I paid mine $900 (US dollars) in mint condition. I bought it as soon as I found it.

  3. #13
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    being new to the pentax 67 world, is there a reason why the 75 2.8 is so much more than the 90 and 105 2.8's?

  4. #14
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    Quote Originally Posted by destroya View Post
    being new to the pentax 67 world, is there a reason why the 75 2.8 is so much more than the 90 and 105 2.8's?
    I bought this glass because of its minimum focusing distance (0.41 meters), sharpness at all apertures and the extra F/stop

  5. #15
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    Quote Originally Posted by destroya View Post
    being new to the pentax 67 world, is there a reason why the 75 2.8 is so much more than the 90 and 105 2.8's?
    Newest prime lens in the lineup. Sharp. Fast
    www.vinnywalsh.com

    I know what I want but I just don't know how to go about gettin' it.-Hendrix

  6. #16
    Poisson Du Jour's Avatar
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    Quote Originally Posted by destroya View Post
    being new to the pentax 67 world, is there a reason why the 75 2.8 is so much more than the 90 and 105 2.8's?

    Aspheric lens element, though by modern lens manufacturing standards, not really a valid reason to jack up the price. There is concern a few Japanese dealers are gouging on price. Have known two examples to be shown for more than $2,000 — ridiculous.

    The lens actually has its best performance at f4.

  7. #17

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    Interesting because I use the lens very often. I was lucky to buy an almost new 67II, 165mm and 75mm as a set on the second hand market in the Netherlands for an exceptional low price. All items in new condition.
    I am very impressed by the performance of the 75mm but would hesitate to use f4. To my understanding (Pentax 6x7) medium format lenses in general show optimal performance from f8 to f11? Is this lens in your opinion an exception? Are there any test reports available?

    Jos.

  8. #18
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    Quote Originally Posted by Jos Segers View Post
    Interesting because I use the lens very often. I was lucky to buy an almost new 67II, 165mm and 75mm as a set on the second hand market in the Netherlands for an exceptional low price. All items in new condition.
    I am very impressed by the performance of the 75mm but would hesitate to use f4. To my understanding (Pentax 6x7) medium format lenses in general show optimal performance from f8 to f11? Is this lens in your opinion an exception? Are there any test reports available?

    Jos.

    Jos,

    Do this:

    Go out and take pictures. Take notes of corresponding photographs(f-stop, shutter speed, etc..)
    When you find a photograph you want to make(I'd recommend using a tripod, just to keep the camera in the same position), find your exposure, and then close down(and moving shutter speed accordingly to keep the same exposure(1/4 @ f8 is the same as 1/15 @ f4, etc....)

    Shoot from F2.8(wide open) down to F22/32, whatever the lens's smallest aperture is.
    Move in full-stops, don't worry about 1/2f-stop movements.

    Process said film(I'd shoot all 10 shots of the same thing, remember, KEEP NOTES!)

    Scan/print said film, whichever way YOU do your post-processing workflow(analog or digitally).

    Make your own comparisons. What works for joe-schmo in XYZ location might not work exactly the same for YOU in ZYX location, etc...

    YOUR OWN EMPIRICAL DATA is CRUCIAL to YOU getting the most out of YOUR OWN equipment and film stock(s) of choice.

    cheers,
    Dan

  9. #19
    Poisson Du Jour's Avatar
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    Quote Originally Posted by Jos Segers View Post
    Interesting because I use the lens very often. I was lucky to buy an almost new 67II, 165mm and 75mm as a set on the second hand market in the Netherlands for an exceptional low price. All items in new condition.
    I am very impressed by the performance of the 75mm but would hesitate to use f4. To my understanding (Pentax 6x7) medium format lenses in general show optimal performance from f8 to f11? Is this lens in your opinion an exception? Are there any test reports available?

    Jos.

    The AL in this lens will prove its worth when you are shooting at minimum aperture of f22; in a non-corrected lens, diffraction will introduce softness into the image caused by light bending past then refocusing onto the common point. In all lenses, blue and green wavelengths can be brought to a common point fairly easily, but not red. With AL elements, one or more concentrate all three wavelengths to the one point, resulting in much improved colour and definition. This is why you should not shoot at f22 or f32 with a 55 or 45mm lens! Most of the SMC Pentax (modern) lenses are well corrected for their purpose; the 75mm AL must obviously have been Pentax's Eureka moment in lens design, much more so than its 75mm shift lens.

    I would be interested in seeing MTF charts of this and other lens characteristics by Pentax, but they are very scant in terms of web availability. Only hobbyists seem to have taken any effort to test them. The best evidence of performance is to speak to people who use the lens.
    .::Gary Rowan Higgins

    One beautiful image is worth
    a thousand hours of therapy.


    "It is horrifying that we have to fight our own government
    to save the environment."
    .::Ansel Adams






  10. #20
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    Quote Originally Posted by Poisson Du Jour View Post
    The AL in this lens will prove its worth when you are shooting at minimum aperture of f22; in a non-corrected lens, diffraction will introduce softness into the image caused by light bending past then refocusing onto the common point. In all lenses, blue and green wavelengths can be brought to a common point fairly easily, but not red. With AL elements, one or more concentrate all three wavelengths to the one point, resulting in much improved colour and definition. This is why you should not shoot at f22 or f32 with a 55 or 45mm lens! Most of the SMC Pentax (modern) lenses are well corrected for their purpose; the 75mm AL must obviously have been Pentax's Eureka moment in lens design, much more so than its 75mm shift lens.

    I would be interested in seeing MTF charts of this and other lens characteristics by Pentax, but they are very scant in terms of web availability. Only hobbyists seem to have taken any effort to test them. The best evidence of performance is to speak to people who use the lens.
    Thanks a lot for sharing your knowledge!

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