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Sigma DP0 Firmware 2.0

in Sigma , Tuesday, May 02, 2017

The recent very welcome and generous firmware update (2.0.1) for Sigma’s DP Quattro cameras has added several new dimensions to working with the output. The update brings two major new features:

  • DNG Output
  • SFD (Super Fine Definition mode)

Of the two, DNG is probably the most significant: it means that it is no longer necessary to use Sigma Photo Pro to process raw images.  They can now be opened directly in various DNG compatible applications. I’ve tried Adobe Lightroom, Photoshop, Photo Mechanic, Alien Skin Exposure, Iridient Developer. They all work fine. This is a huge boost to workflow, and opens up Sigma Quattro cameras to all those put off by having to use Sigma Photo Pro (which, by the way, is actually nowhere as awful as the internet echo chamber would have you believe).

On top of this, you can now use software such as XRite ColorChecker to create customer camera profiles to use in compatible applications.

SFD is a bit more esoteric. SFD mode combines 7 standard frames automatically shot at different exposures to obtain a single file with extended shadow and highlight detail, and lower noise. Basically an auto-HDR, but thankfully without the kitsch. Unlike, say, Olympus in-camera HDR, here all individual frames are saved as RAW and can be selected, discarded, or individually edited in Sigma Photo Pro, if you wish to go too that level of detail (no DNG here).  I’d read some pretty negative opinions of SFD from Sigma SD Quattro owners, so I was curious but not all that excited.

So, yesterday evening I went out to grab a few shows to try all this stuff out. Please note this was just a “kick the tyres” sort of thing, in a context of taking photos that I might actually be interested in, not “testing”, taking a million shots of the pot plant, brick wall, or cat nearest to the couch.

DNG output

The addition of DNG output makes a huge potential difference to workflow enhancement. The question is, what, if anything, are we losing? There are a lot of drawbacks to using Sigma Foveon cameras, but there are also two big plusses, resolution, and colour character. Compromising on either of those arguably makes using the cameras pointless. So, using a frame which is not far off a torture test, with deep shadow and bright highlights, not to mention abundant, potentially troublesome green tones, let’s dive in.

I’ve taken two identical shots, one recorded to X3F file, and the other to DNG. I have processed the X3F file in Sigma Photo Pro (SPP) using “Auto” settings - I don’t usually use Auto, but here it seemed to make sense, as I assume something similar must happen internally in-camera to create RGB data for the DNG file. I’ve opened the DNG file in Lightroom, on default settings, but changed the camera profile to Standard to match SPP. Here are the full frames, compared in Lightroom Library module.

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X3F on the left, DNG on the right

Ok, you’re not going to be able to tell much from these, but the idea is to get an overall feel. The colour in the DNG file seems a little muted compared to the X3F. We’ll look at that a bit later.

The top left corner of the shot is a bit troublesome - again, we’ll look at this when discussing the SFD mode, but let’s see how X3F and DNG compare.

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Top left crop, DNG version

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Top left crop, X3F version

Well, there are some minor differences, but nothing I’d personally lose sleep over. What gets interesting is looking at the potential for colour calibration.  Using the XRite Colorchecker Passport, a made a quick Lightroom profile for the SD0.

Sd0 dng colour profile

Left, custom profile, right, Sigma standard

The difference there is quite clear. I’m not yet entirely sure I prefer the custom profile version, but I think it is probably more accurate. Personally I actually like the somewhat muted saturation that the Sigma standard profile gives, but well, it’s certainly opening up a whole new dimension. It will be interesting to compare a Sigma custom profiled shot of an identical scene shot with another camera.

Lightroom actually has all the built-in SPP colour modes as profiles under calibration. I assume these come in with the DNG. If Adobe had actually put some effort into actively supporting Sigma Quattro cameras, I think we’d have heard about it.

As I said above, I’m not all that unenthusiastic about SPP, but even so, there are a lot of good arguments for using DNG, and so far, I don’t see any significant drawbacks. The out of camera DNGs are huge - about 110Mb to the 60-ish Mb of a corresponding X3F, but apparently running them through Adobe DNG converter shrinks them with no adverse side effects. I haven’t tried it yet.

SFD Mode

A couple of shots here demonstrate the usefulness of SFD mode. Unfortunately I was in a bit of a hurry, and the location I was shooting from was a bit precarious, so I wasn’t very careful about details and the non-SFD version is shot a f/4.5, so the background is not sharp.  Note that this sort of shot, where there is moving water, is not supposed to work in SFD mode.  I found it to work fairly well. The significant thing here is the highlights, in the patches of bright water. The SFD mode has yielded a lot more highlight detail.

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Full scene, SFD mode

Now, two close ups of the two modes.

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Close up, standard mode (auto exposure)

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Close up, SFD mode

Note, the white balance is different in SFD mode. It was actually much cooler, but I made a rough adjustment in Photoshop. The differences in sharpness are irrelevant, as mentioned above, they are down to to wide an aperture on the non-SFD shot. However, what is significant is the extra detail in the bright water patches in the SFD shot. In the non-SFD shot they are completely blown.  Also, note, from this example, the SFD rendering of blurred water is comparable to the non-SFD. However, at the edge of the full frame, there was some minor leaf movement, and there artefacts do show up. Sometimes they will be acceptable, sometimes not. Indeed, I took a different SFD shot with moving water, and in that case some of the patterns were a bit weird.  But it looks like it could be useful, in some situations.

Note, I didn’t encounter any of the processing time nightmares broadcast on the forums. On my computer, Sigma Photo Pro 6.5.3 took under 2 minutes to process an SFD set (.XFI file). That seems reasonable to me.

A second example was aimed more at shadow detail. The full frame is below (in this case I was more interested in shadow detail).

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Looking in detail at the debris in shadow in the lower left:

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Close up, standard mode (auto exposure)

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Close up, SFD mode

I would say that is pretty conclusive.

However, the highlights (sky patches, top left) are blown in both cases. The sky was completely overcast, so that is fine, however the loss of detail in the foliage isn’t so impressive. Here the SFD version does a better job, but neither is brilliant. An extreme case, maybe, but also just one of the Foveon sensor’s weak points.

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Close up, top left, standard mode (auto exposure)

DP0Q0659 X3i tl

Close up, top left, SFD mode

I’m not sure how much I might end up using SFD mode. I would imagine it is more generally useful for static subjects in controlled, indoor conditions, but from this very brief trial, it does seem more useful for outdoors photography than I expected. Anyway, I’m certainly not going to complain.

Thanks very much to Sigma for this update - they don’t really get a lot of publicity, but I doubt there is a company today more dedicated to making great photography equipment at reasonable prices. And they just keep improving.

 

 

Posted in category "Sigma" on Tuesday, May 02, 2017 at 08:39 PM

Sigma stuff for sale

in Site Admin , Wednesday, March 08, 2017

SORRY, NOW ALL SOLD As explained here, I'm having a bit of a clearout, and offering various bits and pieces of Sigma gear for sale at JAW-DROPPING prices.

Everything here is used, but in good condition and full working order. There are some minor marks, but nothing has been dropped or badly handled. If it was damaged, I wouldn't sell it, I'm just not that guy. Everything was bought new, by me, through official importers.

I'm located in Switzerland, which is not in the EU. For EU customers, I can easily send by (registered) Italian post - which is perfectly reliable, whatever prejudice may say. Otherwise I can send worldwide by Swiss parcel post or by DHL (but DHL is very expensive here for private customers). Within Switzerland, I will cover the cost. Otherwise, we can negotiate. From previous sales I have satisfied customers from USA to New Zealand and China.


All prices are given in Swiss Francs (CHF), which are more or less 1:1 EUR and USD. Rounding errors can be negotiated. I've tried to keep the prices fair, and low. Generally I would request payment on receipt of goods by PayPal.

Anyway, here's the stuff.

1. Sigma DP-2 Merrill



Sigma DP-2M with original packaging and accessories including 2 batteries, with following extras:

- Sigma lens shade
- Sigma VF-21 Optical Viewfinder
- JLM grip / baseplate (see review here)

sale1703 - 8

sale1703 - 9

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Asking Price: CHF 400

2. Sigma DP-3 Merrill



Sigma DP-3M with original packaging (USA version, this was bought from B&H) and accessories including 2 batteries, with following extras:

- Sigma lens shade
- Voigtländer 75mm Optical Viewfinder perfectly adapted for DP3M

sale1703 - 10

sale1703 - 11

sale1703 - 12

Asking Price: CHF 400

SPECIAL OFFER



Both cameras together, with a total of SIX Sigma BP41 batteries for CHF 700.
Posted in category "Site Admin" on Wednesday, March 08, 2017 at 03:14 PM

New Panoramics

in Photography , Wednesday, August 17, 2016

Wide format, or "panoramic" photography for me has been synonymous with film and my Hasselblad XPan, since the turn of the century. Well, it seems, no more. On my recent trip to Iceland, for the first time, it stayed at home, and its usurper, the Sigma DP0, came instead. And I really enjoyed using it. You'll find all sorts of opinions and views all over the darker corners of the photo-net droning on about how awful it is, but I ignored all that stuff and just used it. Once you get into the groove, it's really fun to use. The weird shape makes total sense when holding it, and it's a great conversation starter (if you like conversations that start with "what the hell is that!?").

These little renditions below don't really do justice to the jaw-dropping impact of the detail and delicacy seen on a print or big screen, but they go somewhere, I hope, to explaining why the unconventional approach and, er, idiosyncratic software is worth the trouble. Speaking of which, maybe I'm just lucky, but unlike for certain well known pundits, Sigma's PhotoPro software is 100% rock solid for me. I can't remember the last time it crashed, if ever.

But anyway, it's all about the photos, not the gadgetry, and I'm pretty happy with this set.


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So... anybody want to buy an XPan ?
Posted in category "Photography" on Wednesday, August 17, 2016 at 09:10 PM

The Digital XPan, by Sigma

in Sigma , Wednesday, March 09, 2016

I bought my first Hasselblad XPan in 2000, and in the following 15+ years, I’ve accumulated a large shelf full of binders of negatives and (mainly) slides. I bought it because I liked the widescreen format, and I still do. Although a niche camera, the XPan was pretty popular, initially principally with landscape photographers, many of whom used one alongside an SLR. For me, it was the other way around - the SLR was the “second camera”. The XPan started to fade from view with the advent of DSLRs, and Hasselblad/Fuji stopped producing it in 2006, citing some story about a circuit board not being compliant with some convenient European regulations on lead content.

In recent years it has seen something of a revival, and secondhand prices for good copies have risen higher than the original retail. It seems to be riding a lot on the “back to film” movement, and the accompanying mystique. But there do not seem to be many people around who, like me, bought one back near the release date and never stopped using it.  And even fewer people who shoot slide film (still). It seems to be quite popular nowadays for “street” photography, where the unusual frame gives a novelty effect that compensates for many a shortcoming in the photograph. However, with the lenses having a maximum aperture of f/4, and rangefinder focusing, I’m not personally convinced it is that ideal for street. But I’m no authority on the matter.

For me the biggest frustration with the XPan has nothing directly to do with the camera, but with the rapidly shrinking availability of slide film.  My favourites, Kodak E100G and Fuji Velvia 100F (nothing like the infamous Velvia 50 by the way) have long since departed, Fuji Provia 400X is more or less gone, and the only serious choice left is Fuji Provia 100F, which I never much liked. The revival of Ferrania Film is, so far, inconclusive - initial batches of new film are close to a year overdue. Of course the choices in negative film are a little wider. I like Kodak Porta 400, but it only really suits brightly lit urban scenes. Kodak Ektar 100 is ghastly. And I’m a colour photographer by instinct, not black & white. On top of all of this, the bottom has fallen out of both semi-pro E6 processing, and of the semi-pro film scanner market.  So not only is the writing on the wall, but it’s on every wall in every direction.

So, there’s been a lot of calls, directed mainly at Fuji and Hasselblad, to produce a “Digital XPan”. There’s a snag there, though, because a digital sensor covering the full 65x24 XPan format - two “full frame” sensors side by side -  would be horrendously expensive, even though this seems to be what people want. So the question arises, what do we actually mean by “Digital XPan” ? What are the key features ? Would everybody agree? The answer to the last question is obviously a resounding “no”.

The key features of the XPan, technical and otherwise, are:

  • Native “panoramic” double-frame format
  • On-the-fly selectable standard 35mm frame format
  • Rangefinder manual focussing
  • TTL electronic metering
  • Offbeat, unusual camera
  • Built like a tank
  • Interchangeable lenses
  • Very high quality - and expensive - glass
  • Oh yeah… film

Personally, the key feature is the first: a camera which records what-you-see-is-what-you-get panoramic format with a dedicated panoramic viewfinder. In-camera composition is very important to my way of doing and enjoying photography, and for me cropping in Photoshop as some kind of afterthought rarely produces a strong, satisfying image. I emphasise, for me: clearly other people have different opinions. As for film, I’ll fall back again on a quote from one of my heroes of panoramic photography, Stuart Klipper, who when asked why he (still) uses film, replied “because that’s what the Linhof takes”.

So, yes, you can certainly obtain a panoramic frame from any digital camera through post-processing. Many compact cameras also have a 16:9 framing option which you can squint at while holding the camera at arms length in front of your face. But this is simply not the “XPan experience” for me. It doesn’t inspire me, and it doesn’t give me the thrill that seeing the world through the XPan rangefinder does.

And that’s a good time to introduce you to the other camera on the stage here, the Sigma DP0.

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Sigma DP0 with viewfinder, and Hasselblad XPan

I’ve been using Sigma cameras with their unique Foveon sensor since the 50mm-equivalent DP2 Merrill. As I, and many others have written, when these cameras get their ducks in a row, they are truly fabulous. The rest of the time they’re a disaster area. A while back, Sigma introduced a new lineup, using the revised Quattro sensor. They also introduced what would be politely described as an unusual body design. A lot of people were aghast at this. I thought it was fantastic. But I didn’t buy one at the time, as the DP2M & DP3M I already owned were quite enough.  But then came the announcement of the DP0 ultra wide (21mm equivalent), and buried deep down in the specification, the 21:9 framing option. It seemed that somebody in Japan was thinking along the same lines as me.

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The DP0 21:9 aspect ratio

So eventually, after a lot of indecision, I got one, along with the hood viewfinder attachment which allows eye-level composition, which as I have said is a must-have for me, and has the additional benefit of making an already strange looking device look downright weird. It’s certainly a conversation starter.

The 21:9 aspect ratio is a bit deeper than the XPan. It is about halfway between the standard 6x12 and 6x17 ratios - the XPan is slightly taller than 6x17. This is actually fine by me. I often found the XPan format a smidgen too wide, and I’ve always pined for a 612 camera. The resolution of the 21:9 DP0 image (5424 x 2324) is approximately half that of an XPan frame scanned at 4000dpi (around 12200 x 4700), but of course the two are not directly comparable. The actual information content is very similar. Of course, the DP0 has a fixed lens, whereas the XPan has three native lenses to choose from (as well as some other fairly dodgy choices via adaptor). The DP0’s 21mm equivalent lens gives a field of view roughly equivalent to the XPan 45mm lens. And they’re both f/4. And both extremely good quality lenses.

Anyway, that’s an awful lot of babble before getting on to the core of the matter: how do they actually compare ? Well, I don’t do “tests” as such, I really cannot be bothered. But recently I took the DP0 to make a few photos in the nearby Golle della Breggia, in a location I remembered shooting with the XPan a few years back.

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XPan, 45mm lens, Kodak E100G, scanned on Minolta Dimage Scan Multi Pro

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Sigma DP0, processed in Sigma Photo Pro v6.3.2

Of course, these photos are taken at different times of the year, different times of the day, and with different framing, never mind with completely different technology. The only common factor was the photographer. Given that, to my eyes at least they have a quite remarkably similar rendering of colour and tonality. The Minolta scanner, which I have now replaced, also developed a tendency to exaggerate red in the midtowns, which I clearly did not sufficiently correct here. I could certainly get the two photos to look very close in rendition with a few minutes work, but that isn’t the point: what I’m looking to decide is if the DP0 can assume the role of the XPan for me, and I’m tending to believe it can, so far.

It is also interesting to compare resolution. Here again, there is a degree of subjectivity, as the scan is not necessarily optimum, and here no sharpening has been applied (although Sigma Photo Pro allegedly always applies some sharpening). I’ve tried to match two roughly similar areas of the photos, with the DP0 crop at 1:1, and the XPan reduced more or less to match.

DP0

Sigma DP0

XPAN

XPan

So, very, very subjective, but it does look like the Sigma’s Quattro sensor is a match for 4000dpi scanned 35mm Kodak E100G. Not actually a big surprise, although it is probable that with a bit of work I could extract a little more detail from the film.

The XPan still has at least two advantages - the 30mm and 90mm lenses. But in terms of overall end to end user experience, there is a remarkable similarity between the two cameras. Indeed, it can be as time consuming to extract a processed file from Sigma Photo Pro as it is to make a good film scan…

One are where the DP0 wins outright, however, is low light photography. You can do long exposures on film, but dealing with reciprocity failure is painful, especially with slide film. The DP0, on the other hand, will cheerfully make an exposure up to 30 seconds (but no more, let’s not carried away here).  Also, I really like the way the Foveon sensors (both Merrill and Quattro) render tungsten lighting. So to wrap up here are a few shots from my first major outing with the DP0 in Venice.

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It is tempting to draw a conclusion from the fact that since I’ve owned the DP0, the XPan has sat on the shelf. But it is early days yet, and there haven’t really been many opportunities to use it recently. I certainly wasn’t going to take it to Colombia. There are also some situations in which I don’t really trust the Sigmas, in particular snow and ice.  And although the Quattro has much better battery life than the Merrill, it’s still pushing it to reach 100 shots.  Then again, processing 100 shots in Sigma Photo Pro takes roughly a decade, so perhaps it’s just as well.

But I’ll repeat what I’ve said before: the Sigma DP0, with the LCD viewfinder, set at 21:9, is the closest digital camera I’ve found so far in terms of handling and user experience to the Hasselblad XPan. And it’s a great camera in its own right, fun to use and with devastatingly high quality output.

 

 

Posted in category "Sigma" on Wednesday, March 09, 2016 at 12:23 PM

Back in the Crazy City

in Photography , Tuesday, December 15, 2015

Once again, I’m back in Venice. I arrived this afternoon after a 4 hour drive dodging trucks and insane Italians (all of whom - the insane ones that is - drive Audis, for some reason). The idea is some seriously needed rest & recuperation, wandering around Venice with a camera. Or five. Well, I did leave a few at home. With me are my brand new Sigma DP0 Quattro and Olympus E-M1, both the result of a recent what-the-hell retail therapy binge.

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A pseudo XPan shot from the DP0 in 21:9 mode

Things have not got off to a good start, really. I spend the late afternoon on a wide wander from Dorsoduro to Piazza Roma, Cannaregio, San Marco and back, generally fairly disconsolate and wishing I hadn’t bothered. I not exactly “in the Zone”. In fact I don’t even know where or what the Zone is. I’m not even getting the buzz of being in Venice.

I came here with a concept I’ve had in mind for a month or so. I’m not going to go into it now, in case somebody steals it, but I think it is a pretty good concept. Of some Artistic Worth, even. The problem is, although I can express the idea verbally, I’ve really no clear idea of how to approach it photographically. So, the pressure of this, added to the counter-attraction of playing with new toys (despite the fact that I really, but really don’t get much thrill out of that any more), and a general mental exhaustion after a fairly tough year, result in total creative block.

Later, after a chance meeting with another photographer (hi Daniele) - Sigmas are really good conversation starters - a later, a small but tasty risotto ai fungi porcinei, and a glass of prosecco, I started to feel a little better, and played around doing some night shots.

Maybe tomorrow will be a little brighter.

Footnote: since the only thing I seem to be able to put my mind to is playing around with gadgets, I suppose I can allow myself one little bit of geekery. Below is a 1:1 sample of the centre part of the image above, at the end of the passageway. Personally I find it pretty impressive…

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Posted in category "Photography" on Tuesday, December 15, 2015 at 10:40 PM

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