Yearly Archives: 2010

Latest iMac 27″ bench tests

Compared to the HackPro.

When FU Steve built the HackPro to replace my fried 24″ iMac the goal was simple – make something reliable and fast for photo processing with superior heat management and using inexpensive off-the-shelf parts.

Technology marches on and Apple has now released its latest iMac which in its best configuration includes the latest Intel i7 CPU and a 27″ display. Is it better than the HackPro?

Summer 2010 27″ iMac.

HackPro (under the desk!) running two Dell 2209WA monitors, fall 2009 vintage.

The proof of the pudding is in test scores using Geekbench (CPU and memory performance) and Cinebench (video and graphics speed).

The specifications compare as follows, both machines using Snow Leopard 10.6.4:

HackPro:

CPU: 2.83gHz Intel Core2Quad, Q9550
GPU: EVGA Nvidia 9800GTX+ with 512mB GDDR3 memory
RAM: 8gB DDR2 800mHz

iMac 27″ i7:

CPU: 2.93gHz Intel QuadCore i7
GPU: ATI Radeon HD5750 with 1gB GDDR5 memory
RAM: 8gB DDR3 1333mHz

Here are the test results using Geekbench and Cinebench, both in 64-bit mode:

Geekbench 2.1.6 64-bit:

HackPro (my tests):

Overall: 6731
Integer: 6430
Floating point: 10142
Memory: 3385
STREAM: 2545

iMac (Apple Insider tests):

Overall: 10052
Integer: 8868
Floating point: 15764
Memory: 5028
STREAM: 4258

Cinebench 11.5 64-bit:

HackPro (my tests):

OpenGL: 23.44 fps
CPU: 3.16 pts

iMac (Bare Feats tests):

OpenGL: Not stated, but I would guess 20-30% faster
CPU: 5.50 pts

What’s the fastest that Cinebench has tested? Here are the results from their database (12C/12T means 12 Cores and 12 Threads):

Cinebench R11 OpenGL test results – HackPro in orange.

Cinebench R11 CPU test results – HackPro in orange.

The bottom line is that the top of the line iMac i7 CPU model smokes the HackPro with faster video, CPU and RAM performance. The price is competitive too. The top of the line iMac i7 with 8gB RAM sells for $2,399. The HackPro with a like screen (the Dell U2711), CPU, GPU and RAM would cost $2,000 to make.

So what’s to choose?

  • The iMac is $400 more
  • The iMac needs zero construction time. It takes an experienced worker 3-4 hours to assemble the HackPro, and klutzes need not apply
  • The iMac uses an LG 2560 x 1440 IPS display with a glossy glass cover; the screen only accommodates 72% of the AdobeRGB gamut. 1 year warranty.
  • The Dell U2711 uses the same LG display with a matte plastic cover; the screen accommodates 96% of the AdobeRGB gamut. 3 year warranty.
  • Reliability of the iMac is unknown.

So the iMac is a good buy if you can get over the unanswered reliability issue and think you can properly profile that garish screen with the very limited adjustments provided. My experience is that Apple makes some of the most unreliable hardware on earth, with heat managment consistently compromised at the altar of appearance. However, if this new iMac proves reliable then it’s getting very hard to justify the 100% premium asked for the separate box MacPro.

There’s no arguing with the value this time around. Further, if you want a second 27″ display, Apple’s newly announced (glossy, of course) Cinema Display will run you $1,000, which is much the same that Dell is charging for its comparable Ultrasharp 2711.

Am I tempted to upgrade? Not remotely. While I can increase the HackPro’s CPU performance by 20% by simply overclocking the CPU there is no incentive to do so, given my needs. The enhanced speed means little to me as my primary use is Lightroom 3 (where everything is super fast on my rig) and I do no video processing; were I doing the latter for a living I would certainly think about it, if I could get comfortable with the glossy screen and its poor handling of the Adobe RGB gamut. The most likely upgrade in my future is to a pair of larger Dell monitors – either the 24″ U2410 ($500 each) or the 27″ U2711 ($1,000). But that’s a discussion for another day. Stated differently, for my use the HackPro’s processing speed is at the point of diminishing returns, meaning I would have to spend a lot more for a relatively modest increase; the graphics display card remains state-of-the art and can drive anything out there but there are now considerably better and larger displays available, albeit at a price. Indeed, for my day job of money management, which uses lots of stock price, bond yield and live news data feeds, the only thing I would like in the HackPro is more screen real estate. It seems there’s never enough display space available in our information overloaded world.

As a matter of interest, as the HackPro is assembled from readily available off-the-shelf PC components, upgrading to the CPU and RAM specifications of the latest top-of-the-line iMac would necessitate a new motherboard, CPU and RAM at at total cost of $700. The GPU in the iMac is close in specs to that in the HackPro so no upgrade is called for. Everything else in the HackPro – case, coolers, drives, card reader, wireless, can be reused. Not something you can say of the iMac. And given that most of the HackPro’s components come with 3-5 year warranties, a fairer price comparison suggests adding AppleCare at $169 to the cost of the iMac which extends the one year warranty to three years.

How cool does the HackPro run with its five fans (two set on medium – case cooler and HDD cooler, three variable speed – CPU, GPU and power supply coolers)?

The spikes are from running the demanding Cinebench video benchmarks.

Sure would be nice to have that data for the new iMac; when running Lightroom the temperatures barely budge on the HackPro.

If you are spending someone else’s money, not your own, here are the latest MacPro prices, all without a monitor:

Prices for dopes.

Leitz 400mm f/6.8 Telyt

Another funky lens.

Templeton sunset. Leicaflex SL, 400mm Telyt f/6.8 with adapter #14127,
1/125, f/6.8, Kodak Gold 100, handheld with shoulder brace.

Continuing the saga of odd lenses, here’s another one I used for years before it gave way to modern automated technology.

This one is at the opposite end of the range to the 20mm Russar profiled the other day and is none other than the magnificent Leitz 400mm f/6.8 Telyt.

Leitz has a long and storied tradition of making great 400mm lenses, starting with the 400mm f/5 Telyt made for the 1936 Olympics – you know, the games where Jesse Owens so disappointed German hopes for white supremacy. Indeed, you can bet there are many images documenting his four gold medals taken on this very lens. The pre-war model was uncoated and once America had recapitalized them on the sound principle that a fat German was safer than a hungry one, the Germans updated it post-war with a new mount and lens coatings to reduce flare. While the lens was fairly special for its time – f/5 at that length was really fast – it used a conventional rotating helicoid to focus and was a handful to use owing to its great weight. Handling was hardly helped by the fact that the Leica screw mount body user had to first fit a mirror box, the Visoflex, to permit focusing and viewing. This device did Rube Goldberg proud. To make matter worse, Leitz also offered a simple mounting tube and an optical viewfinder, though how on earth you focused or, for that matter, composed accurately with that remains a mystery to me.

So Leitz went back to the drawing board and conceived a handy follow focus mount with a trigger. The user held the grip and, on pressing the trigger, could change focus with a trombone sliding action, with fine focus being accomplished with a turn wheel under the thumb.

The focusing device, the Televit, came in Leica M and R mounts for use on the fine Leicaflex cameras and accepted the lens heads from the 200 f/4 and 280 f/4.8 existing lenses plus two new head units designed specially for the Televit.

These were the 400mm and 560 f/5.6 Telyt lens heads, which could only be used with the Televit, unlike the 200mm and 280mm lenses which came with a traditional, and detachable, helicoid focus mount. The Televit was a big improvement in the focusing department but the whole thing still weighed a ton.

So Leitz tried yet again and, in the 1970s, released their best effort yet, the 400mm and 560mm follow focus Telyts with a modest maximum aperture of f/6.8. These used a simple two element construction and were long focus not telephoto, meaning the 400mm lens really was 400mm (16 inches) long. Like the Televit, the heads for the two optical units were interchangeable and the lens came with a shoulder stock. This was a nice idea but in practice was a pain to assemble, so most dispensed with it. I always preferred a monopod with a QR base with mine and mostly used the lens at f/6.8. Sharpness did not improve on stopping down and you generally wanted to avoid doing that as the aperture control was as rudimentary as on the pre-war f/5 predecessor, meaning click stops with no preset mechanism. Ugh!

I used my 400mm f/6.8 Telyt first on my M2 and M3 with a Visoflex 2 or Visoflex 3 mirror box (much improved versions of the earlier Visoflex 1, but still Goldbergish), then on my Leicaflex SL film body with an adapter where it worked well if slowly – exposure metering was a match-the-needles affair. A nicely balanced outfit. But it really came into its own when the Canon 5D came along and one more adapter ring now allowed use of the lens on a modern high definition full frame body with aperture priority exposure automation.

The 400mm f/6.8 Telyt dismantled for transit.

Assembled.

Built-in filter slot.

The focus release button for the trombone movement.

When I first bought the lens it had been sitting unused for many years and the grease in the trombone slide had dried out. $80 later it was relubricated and working superbly. You really needed no fine focus control as it was so nicely balanced that achieving fine focus just using the sliding motion was easy. This was probably as good as traditional manual focus technology every got with a lens of this length. They can be found for a song on the used market; just prepare to have yours relubricated before use.

As you can see the lens was no slouch:

Egrets off Highway 1, California. Canon 5D, 400mm f/6.8 Telyt with #14127 Leica-M to Leica-R
and Leica-R to Canon EOS adapters, 1/125, f/11, ISO 200, monopod.

The Telyt was sold (as it was in mint condition it went to a collector, needless to add – what a waste) and replaced with the Canon 400mm f/5.6 ‘L’ which is superior in every way – sharper, auto aperture, superb autofocus. Technology had moved on and it’s the reason you will never see a pro using a Leica at a soccer game – they still do not make autofocus long lenses to this day, and without autofocus you cannot compete. That Canon lens has, in turn, been largely superseded by the magical Panasonic 45-200 (90-400mm FFE) which offers 400mm equivalent length at the long end at f/5.6 and – here’s the magical bit – fits in your jacket pocket and weighs under one pound. And did I mention that it includes anti-shake technology?

Apple Battery Charger hype

The latest in spin from Cupertino.

Traditional rechargeable batteries have a short shelf life. They self-discharge quickly and cannot handle many charge cycles before dying.

Apple has introduced a charger with six AA rechargeables using enhanced technology rechargeable batteries. At $29.95 it’s not a bad value as things Apple go, though you are limited to recharging only two batteries at a time and have to avoid the gag reflex when reading the usual hype on their web site. Still, given the low self-discharge rate, that’s not a big deal. Charge two, charge two more, etc. They claim that the recharger has very low static current draw but it would seem to me that any sane person would not leave the charger plugged in unless it was actually charging, so hardly a feature.

The Apple device actually uses Sanyo Eneloop batteries which have been around a while. You can read about the technology here.

And, needless to say, you can do much better on the price by buying the Sanyo four battery charger which comes with eight AA and 2 AAA batteries for $29.45 from Amazon. It also comes with C and D size adapters which take your AA batteries but that’s dumb as small AA batteries will not run long in a high drain device like a flashlight (English: ‘Torch’, which is far more accurate) which typically uses C and D cells. So you get more batteries and a four cell charger for less than the Apple device. No surprise there. Plus the recharger will also charge AAA cells; at least one of my remotes uses those.

Additional AA/AAA Eneloop batteries are very inexpensive at Amazon if you need more than the eight/two supplied. Eight AAs sell for $20 with 4 AAAs at $9, meaning you are getting the charger for all of $5 in the kit.

The model of Sanyo recharger is 110 volt only, but there are multi-voltage versions out there is you look. I cannot tell from the hype on Apple’s web site which voltages their charger works with.

What’s the downside? These batteries can deliver no more than 2000 mAh of current, compared with 2700 for fresh, throw away alkalines. So if you have very high current draw devices, they will seem weak. On the other hand typical uses – Bluetooth wireless keyboards, computer mice, TV remotes, clocks, etc. – will pose no problem.

The upside? Less toxic waste and you always have a battery handy when needed. These will work fine with the Apple wireless keyboard (four in the white original, three in the first aluminum one, two in the current aluminum one) and, best of all, with Pentax DSLRs as Pentax seems to be the only manufacturer out there with the common sense to use regular AA batteries in its fine SLR cameras.

Once my supply of disposable AAs is exhausted I’m buying this little kit. And you can bet I’m not falling for the Apple recharger hype, a device marketed by a company which increasingly regards its customers as stupid.

The Russar 20mm lens

Major league strange.

The Unfinished Church, Bermuda, 1999. Leica M6, 20mm Russar, Kodachrome 64.

Mention of the quirky Leitz Stemar stereo lens yesterday got me to thinking of some of the stranger lenses I have owned. Without a doubt on of the oddest was the 20mm Russar-M f/5.6.

Mine came in black – the Russar 20mm f/5.6 ultra-wide angle lens.


This was a super wide angle Leica thread mount lens without rangefinder coupling. Not that any was needed as at 20mm pretty much everything was sharp all the time. I got mine shipped from the UK for under $200 and it came with the best wide angle viewfinder I have yet seen. Not only was the image clear and relatively undistorted in the finder, the field of view was accurately defined and the whole thing was superbly made using light alloys. None of these atrributes apply to the awful Leica 21mm finder, now in plastic and costing a ridiculous $750 today. Further, the Russian finder had a swivelling foot which allowed you to tilt it down for parallax correction at close distances. A masterpiece.

But the lens was even better. When the Russians took possession of eastern Germany in 1945 one of the priceless properties there was the old Zeiss, Jena factory. I cannot confirm this but am fairly certain that the 20mm Russar was optically identical to the 21mm Zeiss Biogon and like designs, meaning a deeply protruding rear element which rested very close to the camera’s shutter and required a deep rear lens cap for storage. The oddest ‘feature’ of this lens was the aperture ring which was deeply recessed within the front of the lens so you had to stick your finger almost into the lens to change f-stops.

This placement, of course, precluded the use of a filter as with one in place you could not adjust the aperture.

Viewfinder and Russar 20mm on the Kiev copy of the Contax II. The lens also came in a Contax bayonet mount.

The definition was excellent at all apertures and best at f/8. In practice you would simply take a wild guess at the correct focus distance (in meters, not fun for one brought up to estimate in feet!) sight through that wonderful finder and bang away. I kept it permanently mounted, using a screw to bayonet adapter, on my Leica M6 which had such a poor viewfinder (can you say flare? – I shoot into the sun a lot) that it made a natural mule for the Russar. What’s more, it amused me no end to have a Russian lens mounted on what was then Germany’s finest.

The lens was an inexpensive alternative to the Leitz Super Angulon f/3.4 (the earlier f/4 was a real dog) and later Leitz Elmarit and Aspherical Elmarit f/2.8 designs which cost and arm and a couple of legs. The Aspherical variant remains in the catalog at $4,400, so you get the picture. When my Russar-M finally moved on, replaced by that same unbeatable Aspherical Elmarit (it was one of my ‘more money than sense’ moments, I confess) I found myself missing the Russar’s compactness and built-in ‘hood’. The Elmarit was gargantuan by comparison, and the even larger hood an object of ridicule. I never used it. When the Aspherical Elmarit was finally sold I did at least have the pleasure of doubling my money on it, Leica gear prices having gone through the roof.

The equipment pictures above are from the excellent USSRPhoto site which has masses of information on all sorts of Russian camera gear.

Bermuda Sky, 1999. Leica M6, 20mm Russar, Kodachrome 64.

A 20″ x 16″ print of the above over the mantlepiece at home testifies to the quality of the Russar.

Panasonic 3D lens

The Stemar is back!

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Sold in very limited numbers in the mid-1950s, Leica’s Stemar lens was an elegant way of making stereo pictures with your rangefinder Leica.

The 33mm f/3.5 dual lens Stemar

The Stemar lens (the name derives from STEreo elMAR – meaning a simple four element design like the 50mm Elmar) would take two images, each 18x24mm on a standard 24x36mm film frame and came in a kit with a tailored lens hood, a 33mm clip-on viewfinder, a close up lens/prism, and a binocular viewer to permit 3D examination of the transparency image. There was also an even rarer attachment for your slide projector to project the twin images on a large screen. All are visible in the picture below.

Stemar outfit.

Given that it came in a Leica screw mount, easily adapted to the latest Leica M cameras, there’s no reason why it wouldn’t work every bit as well with the latest M7 Leica film camera or even the M9 full frame digital, though I’m not sure how you would create viewable transparencies with the latter; doubtless possible with some ingenuity.

As the picture shows, the lens was something of an ugly duckling, screws showing prominently on the front plate, the ugly protruding finger focus tab, the many gadgets needed to make it work, and definition cannot have been that great. The four element Elmar design works reasonably at 50mm and 65mm (the latter on the Visoflex SLR ‘mirror box’) and well at 90mm but is probably poor at 35mm. Leitz made a 35mm full frame Elmar pre-war and it was soon replaced with the excellent six element Summaron. Compare with the Panasonic lens, below and see what stylish modern design is all about.

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As with all low production Leica hardware, the Stemar has now acquired that awful epithet of ‘collectible’, meaning it’s doomed to a china cabinet and commands a $6,000 price tag at auction. I find this every bit as damnable as the $1mm Ferrari treated in like manner rather than thrashed on the backroads, which was the design intent.

Now a Stemar was not something I ever owned. Even a few years ago when it was actually affordable it would have been no use to me, as a childhood eye defect forever rendered me incapable of seeing in three dimensions. My brain – such as it is – cannot fuse the disparate images, with the happy result that I read with my right and drive with my left eye. It makes for interesting moments when trying to pour red wine in a white tablecloth restaurant, as I have no depth perception, and is the reason you will invariably find me delegating the task! I have experienced too many reddening tablecloths to want to repeat the experience, testimony to my having missed the glass completely ….

But I console myself that my infirmity has been all to the good. Like the blind man with an overly developed sense of hearing, this One Eyed Jack simply tries harder with what he has. While motorcycling near the cliff edge can be an unusually unnerving experience, I grit my teeth and try harder, consoling myself as the journey ends that I am a better and stronger person for the experience! Further, I get to save money and weight on binoculars, as a monocular is fine, the second optic being wasted on me.

But 3D is the coming thing. In one of those mail catalogs I simply cannot seem to unsubscribe from, the assorted big screen TVs for sale were dominated by one thing – labels screaming ‘3D’. Motion pictures are a hit in the format (or so my 8 year old assures me – I cannot go with him as I cannot actually see anything but a head-splitting mess on the screen) as Hollywood discovers the latest in moneymaking technology. More power to them. I get to save on the entry price to the 2D theater.

Many of those 3D TVs in the catalog come, of course, from Panasonic, which is a pioneer of the technology. So it’s hardly a surprise that they will shortly release a 3D lens – just like the Stemar but auto-everything – for the G-series of micro Four-Thirds camera bodies.

Panasonic’s modern Stemar.

I don’t know the focal length but would assume 16mm or so, as the Full Frame Equivalent of 33mm used in the Stemar is ideal for 3D images – anything much longer and the subject tends to lose the 3D effect. Or so I am assured by those with binocular vision. I think it’s a tremendously exciting development as the images taken with this optic will simply be ported to your Panny 3D TV set for viewing with those funky glasses, a far superior experience to the Stemar’s hand-held binocular viewer, I would guess. In that case, your ‘collectible priced’ Leica M9 may finally fulfill the potential, with its equally collectible Stemar, which the latter so under-delivered on over fifty years ago. The G-body + Panny 3D lens will run you some $12,000 less, by the way.

Just goes to show, doesn’t it? There really is not that much new under the sun.

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Here’s Panasonic’s press release on the subject; check the double asterisked note – you can bet Panny’s designers have a Stemar or two in their labs. The English may be stilted but the awareness of the predecessor design is clear:

And here’s the 1954 audience enjoying the predecessor anaglyph system – one lens red, one green: