3d. In the Field - Lenses
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Lenses: Lenses are the unsung heroes of photographic equipment. Many photographers will pontificate endlessly on the relative merits of different types of light-tight boxes, yet ignore the wonders of the lens. Without the lens there would be no photography as we know it (OK, slight exageration as pinhole camera users will attest:-). With one exception, the large format ("LF") lenses I use are now all obsolete - either no longer manufactured or superceded by revised models. But I dont feel penalised by not having the latest and greatest. Since the widespread implementation of multicoating and computer aided design and manufacturing in about the 1970s or so, modern lens formulations have resulted in barely discernible improvements in image quality. Instead, attention has focussed (pardon the pun) on improvements in the conflicting parameters of size, weight and focussing brightness. So provided you are using a lens from a reputable lens-maker and manufactured since about the late 1970s you will be enjoying optical performance that is as close to current as makes no difference. Amongst a collection of different relatively modern lenses sample to sample variation due to such as abuse or handling is more likely to impact a particular lens' optical performance than design specification. Of course, all this assumes you want modern standards of optical performance. In some circles there is a movement away from the razor-sharp modern lenses back to lenses from the 1800s or so. One of the nicer features of the lens is that provided its in good condition then it will not wear out or simply "stop working" - although shutters are a different matter... And speaking of shutters: A difference between LF and the smaller formats is that with LF, the shutter does not form part of the camera body, but rather each lens is mounted in its own shutter. And you'll note that the fastest shutter speeds are slow by smaller camera standards: the fastest speed on a Copal No.0 shutter is 1/500th of a second, while the larger Copal No.1 tops out at 1/400th. While this might be considered limiting, these cameras are not really designed for capturing high-speed action. In practice few of my exposures are quicker than 1/30th of a second. Another feature (advantage?) of large format photography is that you are not tied into a single manufacturer's system. In fact, as far as I am aware none of the "big-four" lens manufacturers (Fuji, Nikkor, Rodenstock or Schneider-Kreuznach) have ever made large format cameras. As a result almost any modern 4x5 LF camera will take almost any modern LF lens designed for 4x5 (although there are a few exceptions with ultra-wide and very long focal lengths). |
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The lenses I use are as follows (from widest to longest):
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A picture of the fleet:
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Top row - left to right (weight excl. lensboard and filter; front filter size; image circle; shutter size) N.B. The 90/f8 - top left - is mounted in a recessed lensboard (see another image below). The other lenses are all mounted on flat lensboards, although the 150/f5.6 - bottom row - is mounted in a generic (non-Linhof) lensboard.
The development of my lens kit may be of interest to others. The first lens that I ever purchased was the Apo-Symmar MC 150mm - a fairly standard focal length lens for 4x5. That lens served me extremely well as a learning tool and some of my favourite images have been made with it. But after a while I decided to supplement it with something from the wider and longer ends of the focal length spectrum. While my first lens was by Schneider-Kreuznach, when considering my next acquisitions I decided to go for a "best-of-breed" approach rather than sticking to a single maufacturer's range. There are pros and cons to each approach. Advantages of mixing and matching include:
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On the other hand, there are advantages to sticking to a single manufacturer's range. These include:
The truth of the matter is that in terms of optical performance, and assuming the particular lens is in good condition, you are unlikely to go far wrong with any relatively recent lens from one of the "big-four" (Fuji, Nikkor, Rodenstock or Schneider-Kreuznach - although Nikkor no longer make LF lenses). Your choice should therefore be determined by intended use. For example, studio shooters who use a lot of camera movements are more likely to place a premium on image circle but wont be so concerned about size and weight; those shooting architecture will place a premium on both image circle and size and weight, while those shooting landscape (where camera movements are not as extreme as in studio or architectural use) wont be quite so concerned about image circle and are more likely to place a premium on size and weight. By and large my choices were based on user feedback in various on-line forums and magazines etc., what my "heroes" (e.g. John Sexton) were using, and recommendations from sources such as Kerry Thalmann's pages. So why did I choose what I did?: |
Nikkor-SW 90/f8 mounted in recessed Linhof lensboard
For many years this 90mm - 150mm - 300mm, 3-lens kit served me well. But after a while I began to find that the spacing (gaps) between the wide, normal and long focal lengths was a bit wide. Too many images were falling between the three focal lengths (no such thing as zoom lenses in LF!). I was happy enough with the lenses at either end of the range, but was finding that the 150mm was often just a bit too short or just a bit too long. I've therefore recently revamped my lens kit by replacing the 150mm with two lenses: a 135mm lens and a 200mm lens. This new 90 - 135 - 200 - 300 kit means each lens is roughly 1.5x the focal length of the next widest lens - compared with the 1.7-1.8x spacing of my original three lens kit. So what factors influenced my choices for the two latest additions?:
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left to right (weight excl. lensboard and filter; front filter size; image circle; shutter size)
Nikkor-SW 90/f8 (355g, 67mm, 235mm, Copal No.0)
Rodenstock Apo-Sironar-S 135/f5.6 (215g, 49mm, 208mm, Copal No.0)
Nikkor-M 200/f8 (180g, 52mm, 210mm, Copal No.0)
Nikkor-M 300/f9 (270g, 52mm, 325mm, Copal No.1)
clockwise from top left (weight excl. lensboard; front filter size; image circle; shutter size)
Nikkor-SW 90/f8 (355g, 67mm, 235mm, Copal No.0)
Rodenstock Apo-Sironar-S 135/f5.6 (215g, 49mm, 208mm, Copal No.0)
Nikkor-M 200/f8 (180g, 52mm, 210mm, Copal No.0)
Nikkor-M 300/f9 (270g, 52mm, 325mm, Copal No.1)
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clockwise from top left (weight excl. lensboard and filter; front filter size; image circle; shutter size) Note the shutter on the Rodenstock lens (bottom row) has the fastest shutter speed (1/500th) at the right when viewed from above. Compare this with the Nikkors in the top row which have the fastest shutter speed on the left. Note also the fastest shutter speed of the Copal No.1 shutter on the 300/f9 (top right) of 1/400s compared with 1/500s for the other two lenses. |
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So, with my 4-lens kit settled, where to from here? Well, I'm not planning any change but if it occurs, it is likely to come at either end of the range:
But so much for dreaming. There is no doubt I'd be much better off getting out and making photographs with the gear I have instead of obsessing about the gear I dont have... |
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