Panasonic's development of the four-thirds sensor format (17x13mm approx.) continues apace with the DMC -G1 and its HD video endowed sibling, the GH1. Both cameras are fitted with the latest LIVEMos sensor developed by Panasonic in partnership with Olympus Optical Co Ltd.
1. The new Olympus Micro Four Thirds camera E-P1. The company promises further developments for this format and one can hope there might be an all black version, preferably in Urushi lacquer.Thus far, products from both companies deliver an extraordinary level of equipment and image sophistication for their sensor size, although it is apparent that both also arrive at visibly different levels of image aesthetic and technical quality.
2. This was made on the Panasonic G1 at approximately four times life size using an old Visoflex mirror box, a set of M bellows and the lens head from of an Elmarit f/2.8 90mm (first launched in 1959.). The image is exceptionally micro-detailed and sharp right in the centre of the full size image.I have limited experience of exploring files from Olympus kit. It includes hands-on an OM e400 and subsequent screen use and printing from that model; handling and inspection of large scale prints (A2) out of an e3 and whenever possible, assessing mechanical print reproduction of OM digital files from the earliest days of the e10 through e1 to the present time. Much more hands-on experience has been gained from reviewing all the models produced by Panasonic.
Each of the 4/3rds models so far produced by this company, the L1, L10 (as well as the rebadged Leica Digilux versions.) and now the G series, have some attractive features. These include - for the L1 and L10 - the excellent performance of the 25mm f/1.4 Summilux designed for use on those two models and more recently, high marks for the new Micro four-thirds 7-14mm Lumix Vario f4.
3. Arrival of a new warship on a really crap sea-misty morning. G1 with Lumix 14-45mm kit lens at ISO 200 captured in highest quality Jpeg mode. The image is sharp all over but small details are compromised by compression when enlarged. Noise levels at this ISO are also noticeably higher and far patchier than for equivalent ISO rated frames made on an APS-C/DX sensor.
4. Detail of a section of the side of the ship (5) when viewed at 100%. The noise patchiness is more apparent. In reproduction on the page, the effect is visible.Another attraction of the L1 is its unique styling and very high build quality. A pity the designer and engineers decided not to incorporate weather proof sealing for the tough magnesium alloy body; I think that would have made the model more attractive for professional use. As ever however, retail cost was already high compared with some other similarly specified products and sealing the L1 would have just pushed the numbers over the edge.
The L10 didn't grab the attention in the same way and while it produces a high level of image quality, I felt it lacked substance. Then along came the G1; Panasonic's first attempt at the Micro 4/3rds lens mount concept with integral electronic viewfinder.
Smaller still than the L10 and lacking a mirror box and opto-mechanical viewing system, the G1 is a compact with interchangeable lens facility. It is very well engineered using an outer magnesium alloy shell but still lacking the all-weather sealing which can be found on some
Dslrs. Despite this, it's a real joy to use, although some buttons and dials could do with a little ergonomic improvement.
As it stands, the G1 might almost fit the perfect shape and size requirement of many users. Together with the appropriate downsizing of lenses made for it, the current full kit offering 7mm - 200mm focal length coverage spread between three objectives seems lost in a medium sized gadget bag.
For some, these relatively lightweight Lumix lenses will cover all their needs. The super wide angle zoom is a particularly interesting piece of kit capable of returning exceptional image results. However, not content to let it rest there, Panasonic engineers have beavered away to produce a set of three lens adapters to enable the mounting of regular 4/3rds and Leica M and R type objectives on the camera which, in the case of the latter two, also retain the G1's 'manual focus assist' feature; a device which enlarges a small central segment of the screen image and upon which it is possible to refine focus whenever the focus ring of an appropriate lens is touched.
With these three adapters, the facility to employ a wide range of objectives of different brands is already in place. Further internet investigation reveals dozens more mechanical lens adapters which may also be used in combination with Panasonic's own to allow the mounting of a vast range of glass of many different focal lengths and marque. Users with armouries of
Canon,
Nikon,
Pentax,
Minolta, not to mention many independent brands, can all enjoy the benefits now offered.
I have found this to be a fascinating experience and during two lengthy review periods, explored the possibilities offered by my own collection of Leica glass mounted on the G1 using a cheap but well made adapter from China for the R type lenses and the VM adapter from Voigtlander for the
Leica M glass. Some of these lenses produced outstanding results; others less so, proving yet again that all digital capture devices need prime cuts of glass for the technology to perform at its highest level.
Not suprisingly perhaps, the performance obtained from some older Leica R telephoto lenses was lacking. In particular, the 1970 Telyt-R 250mm f/4, while capable of obtaining wonderfully smooth toned medium contrast images on
35mm Kodachrome, has such a high level of chromatic aberration, nothing obtained with it on the G1's 4/3rds sensor looked good enough for use beyond half a page on glossy magazine paper. The Telyt-R 400mm f/6.8 on the other hand, produced a usable result wide open; on 4/3rds format, the focal length equates to 800mm.
So far, good results have been obtained with a Summicron-R (1976)50mm f/2, the 1975 Apo-Telyt-R 180mm f/3.4, Summicron 90mm f/2 (for M) and Summicron-M 35mm f/2 ASPH, although the earlier version also produced a nicely rounded quality when stopped down to f/4.0. The Summilux-R 80mm f/1.4 struggled to get anything sharp except right in the centre of the image but stopping it down to f/2-2.8 brought improvements. The large aperture of this lens is useful in low light situations but for sheer handiness, the extra reach it offers and good image quality mark, the 90mm-M f/2 (and later ASPH version.) makes a useful 180mm.
When I mention 'good' in respect of image results I refer to a quality, which, in my subjective analyses of both screen and print reproductions, visibly exceeds results of similar motifs obtained with the designed-for-the-chip lenses of similar focal length. Using the
Leica lenses brings an increased tonal range and with it an increase in the visibility of subtle colour hues. Sharpness of small objects in the frame is high at the point of focus and the shape and construction of the multibladed diaphragms of Leica mechanical objectives lends a more rounded shape to out-of-focus objects.
The longer Panasonic zoom lenses do produce a good high contrast result but it is not the same as from some old primes mentioned above. On the other hand, the Lumix G-Vario 7-14mm f/4 zoom gave such a fine performance, I have yet to be persuaded there is a prime lens of equivalent focal length (when used on 4/3rds.) designed for use on 35mm capable of exceeding it.
Files out of the G1 made in Fine Jpeg mode are recorded at 180ppi default resolution at 22.5 inches on the longest side. Print industry standard resolution requirement for mechanical reproduction is 300ppi despite the fact that the majority of photographs supplied for newspaper use are at 200ppi. For the purposes of magazine repro, I supply files at 300ppi, and so far the number of printed samples seen used up to DPS (A3), or an equivalent size, have pretty much matched the high expectation of them first seen on screen.
But, some problems remain.
Where motifs incorporate large areas of single or similar colour from files made at an ISO 200 - 360, noise (grain) artifacts are visibly patchy in print. This effect was not commented on by viewers I showed examples to, so for them at least, the problem was not an issue. More disturbing perhaps, are the moire effects seen in a series of motifs obtained with a G1.
5. Again, shot with the kit lens in a moment of boredom but after I had discovered the fault in 7. The moire effect discussed in the text is clearly seen here.
6. And this is it (5) as seen at a 1:1 screen level. Panasonic claims it can't be fixed.The cause, according to Panasonic's DSC product development department, is that of the resolution of certain uniform pattern areas in the recorded motif exceeding the capacity of the camera's anti-aliasing filter to prevent moire. According to them, the filter is set at the theoretical limit of sensor resolution and lowering it would have affected the delineation and appearance of image micro detail.
This is where
Olympus and
Panasonic products differ. Results from the former have always struck me as being a little soft, not quite as sharp as one would like or is used to, as if a layer of something transparent has been added to the image. Small details are clearly seen but the overall effect lacks the more sharply edged appearance of large scale prints from the latter. An analogy might be the effect on print appearance similar to the one manifest by diffuser and condenser enlargers.
The trade-off in attempting to squeeze so much out of such a small sensor vacillates between these effects. One gives a very acceptable and smooth visual appearance while the other obtains a harsher (and noisier) but apparently sharper result when images from both are reproduced to the same size.
7. I made this frame out of a coach window (again, boredom.) and looked at it several times before spotting the moire effect (see red box.) caused by the even pattern and resolution of the netting. The frame wasn't made with this in mind, I was more interested in the distant ship at the time. The moire problem is one to watch out for as it could easily be manifest by any number of motif situations. Again, Panasonic were not keen to offer a solution.
8. And just in case you missed it first time around, here's the enlarged section. Frankly, if I had spent the money on this product, I'd be really pissed off by this problem. It doesn't happen with a Leica loaded with film.When post processing is applied with care, G1 large Jpeg files can just about nudge my A3 benchmark; not with the clarity or tonal creaminess of files from a D300 or D700, nor with the more filmic edginess of what can be squeezed from a D1X. The two formats give a different image appearance. GH1 image quality differs slightly as the sensor in this model is a modified version of the G1 sensor. RAW image files from the GH are on a par with those obtained from its older sibling, but Jpeg quality is down slightly compared with the G1, and further down in comparison with similar files captured on APS formats - the result of a/d signal processing attempts to better control noise artifacts.
The G1/GH1 compact design concept offers outstanding versatility with large scale repro image quality pegged at a considerably higher level than that obtainable from much smaller sensors found in pocket compacts like the
Ricoh GRII, GX and Panasonic LX models. The new Olympus Micro 4/3rds EP-1 (lead picture.) may offer improved pocketability, compared with the G1/GH, but it is again very different from those models.
Larger APS-C/DX format sensors produce excellent results for the purpose of most editorial reproduction and there can be little doubt that full frame 35mm ( equivalent) sensors are not now capable of emulating 6X4.5cm medium film format quality. Yet sophisticated small cameras have their own attractions and when these devices incorporate the technology required to deliver a good level of image quality, they invite inspection. It's how the
Leica rangefinder became the tool of choice for generations of photojournalists. Perhaps now, will mark a similar beginning for
micro four-thirds in the digital world.
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www.ajaxnetphoto.blogspot.com 2009.
www.ajaxnetphoto.com 2009.
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