Tag Archive for DSLR

Dispensing with temptation

The compact system camera arena is a burgeoning one with many manufacturers having followed Olympus into the fray. In latter months of last year, Nikon finally took the plunge though Canon have yet to do the same. Seeing offers on Olympus E-PL1 kits with a 14-42 mm zoom lens had me tempted, particularly with a price tag of the order of £250. In fact, I even got to looking into the competition too and a shortlist emerged. This also featured the Samsung NX-11 and the Sony NEX-C3 as well as the big brother of the latter, the NEX-5N.

What eventually countered the allure of shiny objects was the question as to why I needed such an item. After all, I already possess a Pentax K10D DSLR and a Canon Powershot G11 and these have been satisfying my photographic needs for a while now. The DSLR may date from 2007 but it is still working well for me and, if it ever needed replacing, I’d be going for another Pentax with the K-5 being a strong contender. The Canon is doing what’s asked of it so the recent launching of the G1 X isn’t so tempting either.

The whole dalliance has me wondering about how photographic equipment changeovers come about. After all, it was around a decade ago with the DSLR revolution was in the offing if not in progress. Until then, film photography was predominant but it looks as if it got as far as it could from a technological point of view when I look back at what happened. The digital photography area was new and untapped so moving there offered new possibilities and purchases more easily justified. The end result is that very few film cameras are being made nowadays. Ironically, it’s film photography that now is untrammeled terrain for many and it is holding its own too in an era when digital photography predominates.

The same sort of newness that came with digital photography also applies to CSC‘s to a certain extent. From the heritage of half-frame 35 mm film photography, Olympus has fashioned a different type of digital camera: essentially a compact with interchangeable lenses. Was it the fact that I have no CSC that caused me to be tempted and has it happened to others too? Also, is that what got digital photography going in the first place?

It almost feels as if camera manufacturers have to keep bringing to market new models and new types of camera in order to stay in business. After all, Minolta had to sell out to Sony when they failed to get going in the DSLR market quickly enough. The same thing might have happened to Pentax too with the marque passing to first to Hoya and then to Ricoh after the firm lost its independence.

What doesn’t help is the lack of longevity of camera models. The coming of digital photography has exacerbated this situated with models being launched at a frenetic rate. In the days of film photography, a model could last on the market for a few years and there was once a time when a twenty year lifetime wouldn’t have looked so ridiculous though there were incremental improvements made over that time too. For instance, a Pentax K1000 wouldn’t be exactly the same at the end of its production run as it was at the start though the model number may be the same. That world is gone.

Camera types have done better with the SLR design lasting around 50 years so far. However, mirror-less camera technology is adding pressure like never before. Even compact cameras allow live TTL type viewing and Olympus dug into its film camera heritage to add an interchangeable lens mount to give us the first E-P1. The original PEN cameras were half-frame 35 mm affairs and, appropriately enough, their descendants have small sensors in the micro four thirds mould. Then, there’s Sony’s efforts with translucent mirrors that do not move like their SLR counterparts. Canon tried this in the 1980′s with film cameras but never pursued the genre. After that, there are mirror-less SLR-style cameras from Samsung and Panasonic that make you wonder if a full size equivalent is in the offing with live viewing and an electronic viewfinder. Olympus is doing a teaser advertising campaign at the moment and it has some wondering if an OM-D is in the offing.

In parallel with all this, Sony is making a good impression with their CSC’s, the NEX series. These have APS-C sized sensors like many DSLR’s and in compact bodies as well. However, the feel very much is that of a compact camera and some have complained of a like of buttons on them though the photographic quality is very good. Samsung have gone for the same sensor size in their NX-11 thought they have gone for SLR styling. That may be more suitable for some than having to find settings buried in menus.

In summary, we are in an exciting if unnerving time in camera technology at the moment. On one hand, we are seeing a great deal of miniaturisation and what formerly were still cameras can do movie making as well. The latter may not be an interest of mine and it looks like a time-consuming hobby too. A lot is in flux right now and a recent court case reminded us of the difficulties in doing original work these days with image processing in Photoshop forming the basis of a victorious copyright claim. Because the number of images that are getting created everywhere, it could be hard for some to avoid this one and that could be exacerbated if the government changes the law so that intellectual property claims can be processed in the small claims courts. That sort of thing makes film photography seem attractive and it does seem that it isn’t disappearing either, even if Kodak has its financial problems. Novelty seems to change photographic tastes and it seems that film photography is novel again. It’s a changing world and who knows where it take us. Maybe a new DSLR body might make a good purchase in case CSC’s usurp their place entirely. Photographic technology is interesting yet again.

All that was needed was a trip to a local shop

In the end, I did take the plunge and acquired a Sigma 50-200 mm f4-5.6 DC OS HSM lens to fit my ever faithful Pentax K10D. After surveying a few online retailers, I plumped for Park Cameras where the total cost, including delivery, came to something to around £125. This was around £50 less than what others were quoting for the same lens with delivery costs yet to be added. Though the price was good at Park Cameras, I was wondering still about how they could manage to do that sort of deal when others don’t. Interestingly, it appears that the original price of the lens was around £300 but that may have been at launch and prices do seem to tumble after that point in the life of many products of an electrical or electronic nature.

Unlike the last lens that I bought from them around two years ago, delivery of this item was a prompt affair with dispatch coming the day after my order and delivery on the morning after that. All in all, that’s the kind of service that I like to get. On opening the box, I was surprised to find that the lens came with a hood but without a cap. However, that was dislodged slightly from my mind when I remembered that I neglected to order a UV or skylight filter to screw into the 55 mm front of it. In the event, it was the lack of a lens cap needed sorting more than the lack of a filter. The result was that I popped in the local branch of Wildings where I found the requisite lens cap for £3.99 and asked about a filter while I was at it. Much to my satisfaction, there was a UV filter that matched my needs in stock though it was that cheap at £18.99 and was made by a company of which I hadn’t heard before, Massa. This was another example of good service when the shop attendant juggled two customers, a gentleman looking at buying a DSLR and myself. While I would not have wanted to disturb another sales interaction, I suppose that my wanting to complete a relatively quick purchase was what got me the attention while the other customer was left to look over a camera, something that I am sure he would have wanted to do anyway. After all, who wouldn’t?

With the extras acquired, I attached them to the front of the lens and carried out a short test (with the cap removed, of course). When it was pointed at an easy subject, the autofocus worked quickly and quietly. A misty hillside had the lens hunting so much that turning to manual focussing was needed a few times to work around something understandable. Like the 18-125 mm Sigma lens that I already had, the manual focussing ring is generously proportioned with a hyperfocal scale on it though some might think the action a little loose. In my experience though, it seems no worse than the 18-125 mm so I can live with it. Both lenses share something else in common in the form of the zoom lens having a stiffer action than the focus ring. However, the zoom lock of the 18-125 mm is replaced by an OS (Optical Stabilisation) one on the 50-200 mm and the latter has no macro facility either, another feature of the shorter lens though it remains one that I cannot ever remember using. In summary, first impressions are good but I plan to continue appraising it. Maybe an outing somewhere tomorrow might offer a good opportunity for using it a little more to get more of a feeling for its performance.

A tendency for overexposure?

A recent trip to Sweden saw my Canon PowerShot G11 being put to rather more use than was expected. If I had known what might have been coming my way, I may even have eschewed the principle of lightweight packing to bring along my Pentax DSLR. Nevertheless, the little Canon did what ever was asked of it when light was plentiful.

Once thing that I have noticed in comparison with the Pentax is the Canon’s tendency to overexpose a scene. To a point, this can be explained by the former having proper spot-metering and the latter having the less specific partial metering. In fact, that might explain why a Canon EOS 10D SLR in my possession has the same tendency. Maybe it’s time to make more use of the Sekonic light meter that I have but that adds bulk that doesn’t fit in with the idea of carrying a compact camera around with you.

That leaves getting more practice with exposure corrections at processing time (I do capture all my photos in raw format). Going further, I am finding that the same consideration appears to apply to image sharpening too. It’s almost as if you need to develop a feeling for the results produced by a camera before satisfaction with any acquired photos will follow. Having decent lighting at capture time and not having muck on the sensor helps too as I have discovered with the photos made used my Pentax K10D on a recent visit to Arran and Argyll. The state of the sensor needs sorting (even if it has an anti-dust system on board) but I sometimes wonder if my judgement of lighting is what it used to be or whether my aspirations have gone too high. Maybe I need to slow down a little so as to set aside time for working on getting better results and with the right light, a quantity that should come with autumn and winter. In the meantime, I’ll stick with making the best of the British summer.

A new acquisition

Back in the early days of this blog, I mulled over the idea of having a high-end digital compact camera to complement a DSLR that then was delivering very dusty images; that Canon EOS 10D was cleaned since then and comes in for occasional use to this day. That was nearly three years ago and a first generation Ricoh GR Digital was the item that then was catching my eye. At the time, I failed to justify spending that much money on such a thing and ended up acquiring a new Pentax K10D DSLR instead. The question that rattled about my head was this: what was the point of spending DSLR money on a compact camera? Its one that never really went away and comes to mind when you see the prices of interchangeable lens compacts like Olympus’ Pen and equivalent offerings from Panasonic and Ricoh (there, it’s interchangeable lens units rather than actual lenses).

The strongest counterpoint to the cost conundrum is the little matter of size. SLR (film or digital) cameras are sizeable things and there is a place for having something that drops into a pocket. It is that which has propelled me into taking delivery of a Canon PowerShot G11. It may need a good-sized pocket but, unless you are going out with no jacket, it shouldn’t be a problem most of the time. For those shorter sorties when I don’t fancy bringing an SLR out, it well-built and looks the business though some acclimatisation is in order to make the best of the knobs, buttons and menus. Nevertheless, the included manual will help with this process (there’s a paper quick start guide and more detailed documentation on CD).

Canon PowerShot G11

The camera hasn’t seen extensive use just yet so here are a few early impressions. Firstly, there’s the matter of size: it’s even smaller than the first camera that I ever bought (more than fifteen years ago) and that was a Ricoh 35 mm compact film camera. That comparison is even more striking when you consider the feature sets. The Ricoh was a fixed 35 mm lens affair with things like date and time stamping, ISO choice and a nod towards scenic mode selection. In contrast, the much newer Canon is loaded with the sorts of things that normally are found almost exclusively on SLR’s, starting with its effective 28-140 mm focal length range.

Exposure modes such as manual, aperture priority and shutter priority complement scene-based modes and another for movies (not a concern of mine, it has to be said). As if that weren’t enough, there’s exposure compensation too. It came as a surprise to me to find a form of manual focussing included though it is not as convenient as turning a focussing ring on a lens. You can see the inbuilt flash above but there’s also a hotshoe and a place to attach a tripod too. Settings like white balance and file format are accessed using the Function/Set button with the lever underneath the shutter release button controlling the focal length of the lens. In addition, there’s also image stabilisation and that’s important when you’re using live view to compose a photo. Spot metering and focal point selection are other things that find their way into the package. Some may be excited by other things but exposure and focussing are essential for any photographic efforts.

An optical viewfinder is included and it has dioptre settings too but my first impressions are that live view though the rear screen trumps it and I see no need for such things on SLR’s. That also flips out from the camera body and can be rotated either for self-portraiture or for folding back in on the camera body for use like a non-articulated screen. Another use is with those occasions when the subject means holding the camera in positions that would be impossible with a conventional screen; holding the camera over your head or down low on the ground are the sorts of situations that come to mind.

Of course, there’s more there than those features that I have listed and the specifications on the Canon website are as good a place to start as any. So far, my only testing has been of the cursory checks variety and to make sure that the thing works properly. Still, this has given me more of a feel for the camera and how it operates. As you’d expect, high ISO settings are noisy but a bigger surprise was that the smallest aperture setting is f/8. Being used to SLR’s, I was expecting to get f/16 and its like on there but a spot of internet investigation showed that I should have been taking the size of the sensor into account with my expectations. Any trials so far have been in dull weather so I’d need to use it in a wider variety of conditions before giving it the sort of wider appraisal that you’d find in the likes Outdoor Photography (who liked it, it has to be said). For what it’s worth, I have found no major criticism so far though I cannot see it usurping my SLR’s but that never was the intention anyway.

ImageMagick and Ubuntu 9.04

Using a command line tool like ImageMagick for image processing may sound a really counter-intuitive thing to do but there’s no need to do everything on a case by case interactive basis. Image resizing and format conversion come to mind here. Helper programs are used behind the scenes too with Ghostscript being used to create Postscript files, for example.

The subject of helper programs brings me to an issue that has hampered me recently. While I am aware that there are tools like F-Spot available, I am also wont to use a combination of shell scripting (BASH & KSH), Perl and ImageMagick for organising my digital photos. My preference for using Raw camera files (DNG & CRW) means that ImageMagick cannot access these without a little helper. In the case of Ubuntu, it’s UFRaw. However, Jaunty Jackalope appears to have seen UFRaw updated to a version that is incompatible with the included version of ImageMagick (6.4.5 as opposed to 3.5.2 at the time of writing). The result is that the command issued by ImageMagick to UFRaw – issue the command man ufraw-batch to see the details – is not accepted by the included version of the latter, 0.15 if you’re interested. It seems that an older release of UFRaw accepted the output device ppm16 (16-bit PPM files) but this should now be specified as ppm for the output device and 16 for the output depth. In a nutshell, where the parameter output-type did the lot, you now need both output-type and output-depth.

I thought of decoupling things by using UFRaw to create 16-bit PPM files for processing by ImageMagick but to no avail. The identify command wouldn’t return the date on which the image was taken. I even changed the type to 8-bit JPEG’s with added EXIF information but no progress was made. In the end, a mad plan came to mind: creating a VirtualBox VM running Debian. The logic was that if Debian deserves its reputation for solidity, dependencies like ImageMagick and UFRaw shouldn’t be broken and I wasn’t wrong. To make it fly though, I needed to see if I could get Guest Additions installed on Debian. Out of the box, the supported kernel version must be at least 2.6.27 and Debian’s is 2.6.26 so additional work was on the cards. First, GCC, Make and the correct kernel header files need to be installed. Once those are in place, the installation works smoothly and a restart sets the goodies in motion. To make the necessary Shared folder to be available, a command like the following was executed:

mount -t vboxfs [Shared Folder name] [mount point]

Once that deed was done and ImageMagick instated, the processing that I have been doing for new DSLR images was reinstated. Ironically, Debian’s version of ImageMagick, 6.3.7, is even older than Ubuntu’s but it works and that’s the main thing. There is an Ubuntu bug report for this on Launchpad so I hope that it gets fixed at some point in the near future. However, that may mean awaiting 9.10 or Karmic Koala so I’m glad to have the workaround in the meantime.

Ubuntu upgrades: do a clean installation or use Update Manager?

Part of some recent “fooling” brought on by the investigation of what turned out to be a duff DVD writer was a fresh installation of Ubuntu 8.10 on my main home PC. It might have brought on a certain amount of upheaval but it was nowhere near as severe as that following the same sort of thing with a Windows system. A few hours was all that was needed but the question as to whether it is better to do an upgrade every time a new Ubuntu release is unleashed on the world or to go for a complete virgin installation instead. With Ubuntu 9.04 in the offing, that question takes on a more immediate significance than it otherwise might do.

Various tricks make the whole reinstallation idea more palatable. For instance, many years of Windows usage have taught me the benefits of separating system and user files. The result is that my home directory lives on a different disk to my operating system files. Add to that the experience of being able to reuse that home drive across different Linux distros and even swapping from one distro to another becomes feasible. From various changes to my secondary machine, I can vouch that this works for Ubuntu, Fedora and Debian; the latter is what currently powers the said PC. You might have to user superuser powers to attend to ownership and access issues but the portability is certainly there and it applies anything kept on other disks too.

Naturally, there’s always the possibility of losing programs that you have had installed but losing the clutter can be liberating too. However, assembling a script made up up of one of more apt-get install commands can allow you to get many things back at a stroke. For example, I have a test web server (Apache/MySQL/PHP/Perl) set up so this would be how I’d get everything back in place before beginning further configuration. It might be no bad idea to back up your collection of software sources either; I have yet to add all of the ones that I have been using back into Synaptic. Then there are closed source packages such as VirtualBox (yes, I know that there is an open source edition) and Adobe Reader. After reinstating the former, all my virtual machines were available for me to use again without further ado. Restoring the latter allowed me to grab version 9.1 (probably more secure anyway) and it inveigles itself into Firefox now too so the number of times that I need to go through the download shuffle before seeing the contents of a PDF are much reduced, though not completely eliminated by the Windows-like ability to see a PDF loaded in a browser tab. Moving from software to hardware for a moment, it looks like any bespoke actions such as my activating an Epson Perfection 4490 Photo scanner need to be repeated but that was all that I needed to do. Getting things back into order is not so bad but you need to allow a modicum of time for this.

What I have discussed so far are what might be categorised as the common or garden aspects of a clean installation but I have seen some behaviours that make me wonder if the usual Ubuntu upgrade path is sufficiently complete in its refresh of your system. The counterpoint to all of this is that I may not have been looking for some of these things before now. That may apply to my noticing that DSLR support seems to be better with my Canon and Pentax cameras both being picked up and mounted for me as soon as they are connected to a PC, the caveat being that they are themselves powered on for this to happen. Another surprise that may be new is that the BBC iPlayer’s Listen Again works without further work from the user, a very useful development. It very clearly wasn’t that way before I carried out the invasive means. My previous tweaking might have prevented the in situ upgrade from doing its thing but I do see the point of not upsetting people’s systems with an overly aggressive update process, even if it means that some advances do not make themselves known.

So what’s my answer regarding which way to go once Ubuntu Jaunty Jackalope appears? For sake of avoiding initial disruption, I’d be inclined to go down the Update Manager route first while reserving the right to do a fresh installation later on. All in all, I am left with the gut feeling is that the jury is still out on this one.

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