The Cooke PS945: a Visioning Tool
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v 1.4 The Cooke PS945: A Visioning Tool by Donald M. Tsusaki throw the background out of focus or keep it sharp, which at a minimum means INTRODUCTION paying attention to negative space, or photographically symbolizing depth. One The Cooke 229mm f/4.5 PS945 Portrait is can also consider how an out of focus one of the most unique lenses available to background is rendered, not just as an a large format photographer. Although uncontrollable photographic symbol of “out many think of the PS945 as just a soft- of focus,” but where the diffused, blurred focus lens, implying that it therefore is of blobs of light or color become image limited use, the PS945 is in fact highly elements in themselves. versatile. Beyond its soft-focus as well as excellent sharp-focus capabilities; beyond By making the choices about how image its moderately long focal length, suitable elements are rendered more explicit, the for product or portrait photography; PS945 can help to heighten the beyond its flare-free coatings and super photographer’s awareness as he or she build quality, the PS945 can also act as, if sees photographically. This is what could you will, a visioning tool. make the PS945 a visioning tool for some photographers. The large format camera serves two basic roles, that of previewing, then capturing Overall the body of knowledge about the the image. Capturing the image PS945 is relatively sparse. There are a encompasses all of the techniques and few good resources from which one can technologies, whether digital or analog, learn about the PS945. With the lens, that ultimately resulting in converting the Cooke includes a CD that has an article image to some sort of presentation format. from Jay Allen and a few pictures by Clive In its previewing role, the large format Russ. Jay’s article gives some good hints camera, essentially the lens and ground about how to get the most out of this lens. glass, is an aid to photographic seeing. Though the lens has been on the market for about 2 years, and certainly many One of the first exercises in Betty photographers in that time have been Edwards´ book, “Drawing on the Right exposed to the lens at workshops, so far Side of the Brain,” is to draw an upside- few users have shared out their down picture of Igor Stravinsky. The idea experiences. Searching the Internet yields is to shut down the left-brain that wants to some nuggets of knowledge about the name objects, and to allow the right brain PS945, but of course in no organized to take over. The ground glass serves fashion. Most of the search returns, exactly this purpose in the preview role. however, lead to questions about the lens Edwards also asserts that drawing and in many cases speculations about requires five basic skills, the perception of how the lens performs. edges, spaces, relationships, lights and shadows, and the whole (gestalt). The To augment the body of knowledge, this lens has the task of projecting the image article shares my first learnings about the onto the ground glass, an image that characteristics and behaviors of the contains edges/lines, spaces, PS945. My experimentations so far have relationships, etc. centered around getting a handle on the basic characteristics of the lens: soft- The PS945, just like any other large format focus, its uncommon optical behaviors, lens, fulfills its role of projecting an image. and some mechanical notes. I conclude The way it forms the image is what gives it with a proposal about building a added value in making a picture. One has community of PS945 users that could be to make a choice whether to render an aimed at extending the body of edge or line in the image as soft or sharp, knowledge. which means one has to pay attention to the line. One has to decide whether to The Cooke PS945: A Visioning Tool page 1 of 10 http://www.photoverge.com © 2004 Donald M. Tsusaki. All rights reserved. Republication or redistribution of content by the author, including by framing or similar means, is prohibited without the prior written consent of the author. 'PhotoVerge' is a trademark of Donald M. Tsusaki. v 1.4 The Cooke PS945: A Visioning Tool In spite of its rarity, the Quality IV became “You may not, and probably will not find known for its imaging qualities. out their full possibilities for some time. I had one lens in my possession for over Does the PS945 exactly duplicate the two years before I discovered that it was imaging characteristics of the Quality IV? the best one I owned.” Having never used a Quality IV I have no point of reference. Based on dialogs I Alvin Landon Coburn, 1920, describing have had with representatives from Pinkham and Smith lenses Cooke, I am convinced that they are being genuine with their claims. My belief is that FIRST IMPRESSIONS the passion of the Cooke lens team to capture that je ne sais quoi of the Quality Coburn may have had to discover the IV in their design dominated the creation value of his lens over two years, but these process. days one needs to get a return on investment much quicker. At least, a Beyond historical verisimilitude, the PS945 photographer would want to achieve the is successful in its own right. Its modern greatest amount of satisfaction from his or design surely improves upon the original. her PS945 as quickly as possible. Coburn The manufacturing process most certainly surely did not have any means as effective produces more consistent results today. as the Internet to acquire knowledge. The Copal 3 shutter makes exposure Today it is possible to speed up the predictable, and of course it is completely learning process by accessing the compatible with electronic flash. The lens experiences of others. Structuring a body coatings are superb. Even in strong of knowledge makes the learning process backlight there is no ghosting or flaring. even quicker. However, reading and One could argue that the lens coating research ultimately satisfies mainly the makes it impossible to exactly replicate the instant gratification needs of the left brain; behaviors of the uncoated Quality IV for in the spirit of Coburn’s quote, one should which flare may have been a key quality. expect to spend some time using the Part of what makes the PS945 so versatile PS945 in artistic endeavors to really is that the design fuses the best of modern discovers its full possibilities. optics and manufacturing with the imaging characteristics of its famous forebear – If the PS945 anywhere near approximates and it is readily available today. the imaging characteristics of its ancestral predecessor, the Pinkham and Smith What makes the PS945 “versatile”? The Visual Quality IV must certainly have been most obvious characteristic that a wonderful tool to use. Though Coburn distinguishes it from other modern lenses may not have been talking specifically is its ability to produce a range of image about the Visual Quality IV, it is reflective qualities from soft to sharp. In the middle of the way Pinkham and Smith brought of the soft-sharp spectrum it can produce lenses to the market – designing lenses images with a nice buttery feel. And on based on the specific requirements of sharp end, it is equally competent as other certain photographers and producing them lenses for f/64-type, all-over sharp images. in relatively small quantities. According to In parallel, the PS945 gives slightly lower Barbara Lowry’s history article, also contrast for some subjects on the soft end included on the PS945 CD, J. Wallace and crisp high contrast on the sharp end. It Gillies requested Pinkham and Smith to performs well for distant subjects as well create the lens that was dubbed the Visual as in the macro range. The 229mm focal Quality IV. Following their customary length is a very good compromise business model, P&S produced few of between the normal lens range and the these lenses. Perhaps by shunning typical portrait focal lengths. It has a marketing P&S was able to keep demand slightly wider maximum aperture within scope of their production capacity. compared to most lenses available today, The Cooke PS945: A Visioning Tool page 2 of 10 http://www.photoverge.com © 2004 Donald M. Tsusaki. All rights reserved. Republication or redistribution of content by the author, including by framing or similar means, is prohibited without the prior written consent of the author. 'PhotoVerge' is a trademark of Donald M. Tsusaki. v 1.4 The Cooke PS945: A Visioning Tool and can reach a smaller aperture (f/90) contain links to larger versions of these than many lenses provide. Specialty lens pictures on the PhotoVerge website.) is hardly an apt description. The first couple of pictures show how soft- focus varies with f/stop. Illustrations 1 and SOFT-FOCUS 2 were taken deliberately against a cluttered background, in part to get a feel The soft-focus behavior of the lens is non- about the “bokeh” of the lens. linear. If you use a reasonably strong loupe, perhaps 6x or more, it is educational to observe how soft-focus dials in as you vary the aperture. This is easiest to notice by looking at a specular highlight or a very distinct line created between a light and a dark object. Going from f/11 to f/8 there seems to be little soft-focus introduced, and one has to look hard for any differences. Between f/8 and f/5.6 the soft-focus starts to become easily noticeable.