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cesar_barreto

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Posts posted by cesar_barreto

  1. Wayne,

    Maybe you're dealing with some other variables: the effect of

    enlarging lens, as all of them suffer from some sort of fall-off, and

    the way you're measuring this. A blank sheet, printed for medium

    gray, using different f-stops and different lenses may show clearly

    how deeply in trouble you are. Good luck!

    Cesar B.

  2. Hi, Matthew,

    If you look back on older posts you'll probably find some discussion

    about it. And certainly you'll find some contradiction. For sure, it

    can be stated some few points: 1- some diffusion is always welcome

    for the purpose you want (printing a step wedge can show it pretty

    fast); 2- there'll be some, maybe expressive, light loss; 3- one

    should be careful not to print some diffusion texture; 4- a softer

    head may leave you more confortable to explore controls on exposure

    and development of modern emulsions. In short, try it. It can be the

    shortest and cheapest way to work with two heads in one.

    Good work.

    Cesar B.

  3. Some messages ahead I didn't want to show individuality on my own

    tastes, wich after all, doesn't make any difference for the matter.

    But, in addition to James and others, it should be stated clearly:

    after a long, long road seeing and making B&W prints, I'd never seen

    a RC print looking nearly as beautiful and rich as Forte print. Maybe

    sometime, not till now.

     

    <p>

     

    Cesar B.

  4. Joe,

    Grain,or granulation, or whatever you notice in your prints, depends

    just on the following variables: emulsion, exposure, developer

    formula, development techniques (all of them), magnification,

    enlarger source of light, optics and (probably, forgetting something

    else) even paper grade. So, open yours eyes, there's a lot to learn

    in this field. Good luck.

     

    <p>

     

    Cesar B.

  5. Hi Paul,

    Probably your're facing the most difficult task on photo appreciation,

    wich means creating a taste and a sense of quality. For sure, RC

    prints will stand out easily on side-by-side comparasion, mainly

    because it has artificially brightened whites that will transform UV

    light into visible light, contributing greatly to its plasticine look.

    Even curves can stand close matching and, maybe, even show better

    values on D-Max and density range. There's no doubt RC prints will

    satisfy most of your potencial clients. But... it looks like plastic,

    feels like plastic, behaves like plastic. So it's quite easy to

    understand why devoted printers still prefer to work with real paper.

    As mentioned before, it's a sense of quality not just a matter of

    technical performance. And, by the way, why not to try some other

    beautiful and rich emulsion, before being so disappointed?

    Welcome to FB arena!

     

    <p>

     

    Cesar B.

  6. David,

    Unhappily, your optics aren't the best options for macro work. The

    90mm, wich I suppose to be a wide-angle, is a unsymmetrical design

    optimized for reductions, and probably will compare badly with an

    enlarging lens, for example. The 210mm - a great lens - makes your

    bellows extension quite unconfortable. At 1:1, 420mm. Going farther

    on magnification will strech your arms proportionally. I've been

    working on some 6:1 macro work and having a good time with 105/5.6

    and 150/5.6 Nikkor-W. They're almost symmetrical and allow some space

    for lighting as well. Obviously, an assistant arm is still great

    value.

    Have fun.

    Cesar Barreto

  7. Eric,

    Reciprocity characteristics depends a lot on emulsion formulation and

    if you look around, on John Sexton writings for instance, you may

    find that at long exposures T-Max 100 can be even faster than Tri-x.

    People in industry seems to be working hard on these things.

    As about your math, can't say much, as I've never found myself any

    significant differences on small percentages up or down anything.

    Experimental errors usually comes on much bigger numbers.

    I hope somebody else shall give some better information on this.

    Greetings,

    Cesar Barreto

  8. Joe,

    It is always usefull to keep in mind that grain usually comes in pair

    with density. Pushing techniques can lead to grainy highlights,

    medium tone a bit less and empty shadows with no grain at all. And to

    make things worst, you can find that printing this contrasty negative

    on softer paper usually softens grain alltogether. So, the suggestion

    is trying some over-exposure, changing or not the contrast by

    development, and printing this somewhat "dark" negative on high

    gradation paper. This way, grain may show uniformily spread all over

    the image, varying with your exposure and printing options.

    Of course, Rodinal is always wellcome... And any Tri-x works fine

    this way. Greetings,

    Cesar Barreto

  9. Keith,

    Flare on printing stage is easily detectable on high contrast

    borders. If you print, for instance, a heavily dense negative showing

    part of the blank border, it might be obvious some "bleeding" from

    dense areas of the print. Another simple test, if you have a good

    lens, is printing detailed shadows while looking for resolution on

    near black densities. Flare is a killer of details on these

    situations.Good luck.

    Cesar B.

  10. Joseph,

    If your films are a bit more dense than usual, they will probably be

    grainy. Those things usually come together. An easy test could show

    you if you're over-exposing and over-developing. Don't take for

    granted spec sheets neither your camera and meter functions. By

    experience, I can assure you HP5 is quite versatile and can be handle

    to exhibit any kind of image you want.

    Enjoy it.

    Cesar B.

  11. Xosni,

    Are you sure about what you're looking at?

    At ISO 1600 and higher shutter speeds and apertures are usually more

    confortable allowing some improvements on sharpness, independent of

    what soup is in use. I suppose that a fair test would be shooting the

    same situation using the same stuff and, of course, a solid tripod.

    Try it and tell us what you see.

    Cesar B.

  12. Mike,

    I had exactly the same trouble with an old model and after some

    strugle finally discovered that the shutter had been replaced and it

    was altering flange distances between front and back elements. I hope

    you can check this easily by rotating each element while looking

    through a opal glass put on the back of the camera.

    I'm still willing a new camera, but things are much better now.

    Good luck!

  13. Louise,

    I can suggest two to start:

    1-The Photographer's Master Printing Course, by Tim Rudman and

    2-Basic Photographic Materials and Processes, by Stroebel, Zakya, etc.

    The first will take you from the beginning as far as you can get and

    the later will give you enough information on photography for some

    years of travel.

    Good luck.

    Cesar Barreto

  14. Raven,

     

    <p>

     

    As this people from Sprint doesn't make films or papers, don't worry,

    their chemistry might be fully compatible with any emulsion or

    whatever developer your prefer. Stop baths don't contribute to image

    formation and fixing only changes on speed and capacity. Good luck!

    Cesar Barreto

  15. Claudia,

    I'm not quite an expert on Tri-X in sheet format, but I've been using

    HC-110 for as long as I exist (photographically, I mean). And I

    presume that it wouldn't be any sacrilege to say that with this

    combination you've a quite good margin of operation and error,

    without sacrifing much of you negative potential. Mainly, if you're a

    good printer...

    Anyway, it's plain obvious that some testing should be done before you

    "test" the wrong negative. Both Tri-X and HC-110 have outstanding

    latitude and some testing should exhibit this clearly.

    Welcome to the tray game.

    Cesar B.

  16. Doug,

    Unfortunately, I had much less classes than wish I had, but from

    years till now I've been trying to teach something. People who seeks

    photography must learn above all that it's a meaning of expressing

    something that no teacher can tell them exactly what it is. Every

    time you finish a print you've aborted some other thousands of

    equally interesting and valid possibilities. There's where techniques

    comes for help. The more you know, the freer you come for creating a

    personal and original work. But, first of all, you've got have some

    personal and original thing to say. Otherwise, no luck will help

    someone, even technically prepared, to stand out in the crowd.

    It works here in Brazil and I suppose it must be OK everywhere.

    Good luck in your first class!

    Cesar B.

  17. Nick,

    You have two chances: read all you get in hand and find you'll

    problably be in trouble going far too close, or try to relaxe and use

    a good symmetrical lens. If you find something so terrible happening

    in the near world, you've pretty good eyes! I haven't found myself

    yet. Have fun!

    Cesar B.

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