5.31.2006

Nikon 105mm f/2.8G IF-ED AF-S VR Micro-Nikkor User Report

Serious Flower Power

[ Our "User Reports" are observations by the user of an actual production unit in what can be considered normal use by a "serious user". We avoid the term "review", since the product is not put through the rigorous repeatable test systems and conditions of a product review. We do make pains to ensure, by offering as detailed a report as possible, that these are no less informative than a formal review. ]

Rumors of this lens came out late in 2005 when photos and specifications of the lens were leaked. These specifications were quickly discounted as fakes by armchair experts, many of whom believed that it was implausible simply because it was unthinkable or impossible that Nikon would come up with a "flower" lens with Vibration Reduction and Nano Crystal Coating. Early this year, Nikon did the impossible and came out with the 105mm f/2.8G VR Micro-Nikkor, making this probably the most advanced macro lens today in any of the 35mm lens lineups.

Build

The 105/2.8 VR is a big lens, much bulkier than the previous, non-VR, version of the 105/2.8 AF lens. Nearly a third of the length of the lens is dominated by the rubberized plastic focus ring. A plastic panel on the left side of the lens holds three plastic mode switches. The rest of the body is made of tough, cast metal alloy. The lens mount is also metal and has a rubber gasket to seal the mount from the environment when attached to a camera body. The 62mm lens thread is also in metal. The top of the lens has a clear window for a distance/magnification scale.



In the box, the lens comes with the excellent Nikon front and rear lens caps made of similarly durable plastic, and a lens hood. The included lens hood is a large HB-38 bayonet-type hood. It is made of tough plastic and reverses onto the lens for storage.

Handling

The first thing one has to get over with the Nikon 105/2.8VR is the size and weight. It is considerably bigger and heavier than other 105mm lenses, and literally eclipses its equivalents. With its big lens hood attached, the 105/2.8VR blocks the pop-up flash on the D50, causing undesired shadows (take the lens hood off or reverse it when shooting with the pop-up flash). Its bulk also blocks the AF assist lamp on the D50, even without the lens hood attached.

The Nikon 105/2.8VR is an AF-S lens with Silent Wave Motors. The focus ring's considerable diameter makes it easy to handle. The focus ring spins smoothly and precisely. Autofocus action is silent and fast, though it will occassionally hunt when focusing up close (this may be due to the lens shortening its focal length as it closes in focusing distance). It has an M/A mode that allows manual focus override while in autofocus mode. A focus limit switch lets you toggle from the full focusing range to a limited range (from infinity to 0.5 meters). It also has Internal Focusing, so the front element does not rotate, making it easier to use with circular polarizers and other filters.

The Vibration Reduction system engages and disengages with a slightly audible click when you half-press to focus, or when focus lock is activated either through AF-Lock. The VR action shows up clearly when shooting handheld. The image through the optical viewfinder visibly stabilizes as it counters camera shake. [More details on the VR system are in a separate section below.]

This is a G-type lens, so it does not have an aperture ring, and the aperture is instead set on the camera body.



The lens has a quoted closest focusing distance of 1 ft (0.314 meters). It also effectively changes focal length as it focuses closer. The maximum aperture changes as the focusing distance changes. Many new users of IF macro lenses are surprised to find that you cannot get the maximum f/2.8 aperture at less than 3 meters focusing distance. The maximum aperture goes down to as little as f/4.8 at the closest focusing distance.

Distance (meters)Magnification (1:x)Max Aperture
0.3141f/4.8

1.1f/4.5
0.331.2f/4.2
0.351.4f/4
0.37
f/3.8
0.42f/3.5
0.452.5f/3.3
0.64f/3.2
around 1.5nearly 10f/3
3 above
f/2.8

Image Quality

Impressively, the Nikon 105/2.8 VR shows center and corner sharpness through the entire aperture range. The sweet spot is said to be between f/5.6 to f/11, but inspecting 100% crops did not reveal much loss of sharpness at the larger apertures. This probably has a good deal to do with the ED glass element and Nano Crystal coating showing its worth, but it is also probable that the lens outresolves the 6-megapixel APS-C sensor on the test body (a Nikon D50), so any decrease in sharpness is not as apparent.


[ Nikon D50 and Nikon 105mm f/2.8G AF-S VR Micro-Nikkor with Nikon SB-600 and Lightsphere 2 PJ ]
[ 1/60s f/4 105mm ISO800 flash bounced handheld ]


[ Nikon D50 and Nikon 105mm f/2.8G AF-S VR Micro-Nikkor ]
[ 1/40s f/16 105mm ISO200 handheld ]

Likewise, color and contrast are also consistently well rendered through the range of apertures. The only flaws in this gem are flaring and chromatic aberration, which shows up in high contrast scenes from maximum aperture (f/2.8) and is minimized by f/5.6. This is, however, typical of many large aperture lenses at maximum aperture.


[ Nikon D50 and Nikon 105mm f/2.8G AF-S VR Micro-Nikkor ]
[ 1/50s f/16 105mm ISO200 handheld ]


Bokeh is one of the best traits of this lens, pretty much up there with some of the best Nikkor lenses, like the 85/1.4 AF-D. Out of focus areas are smooth, and the 9-bladed diaphragm helps to render out of focus point lights as circles rather than harsh geometric shapes.


[ Nikon D50 and Nikon 105mm f/2.8G AF-S VR Micro-Nikkor ]
[ 1/250s f/8 105mm ISO400 handheld ]


[ Nikon D50 and Nikon 105mm f/2.8G AF-S VR Micro-Nikkor ]
[ 1/320s f/8 105mm ISO400 handheld ]

Vibration Reduction (VR)

The "party piece" of the Nikon 105/2.8 VR is the Vibration Reduction II system, which stabilizes lens elements to correct for camera shake in various situations. VR-II is the latest iteration of Nikon's Vibration Reduction technology, and the system on the Nikon 105/2.8 VR is similar to the system on the megazoom Nikon 18-200mm VR. Unlike the VR-II on the 18-200, however, the VR-II on the 105/2.8 VR can only be turned "On" or "Off" and does not have a "Normal-Active" switch. It does interpret any sweeping horizontal movement as panning, and in this case will correct only for vertical movement. VR-II can also be used when the camera is mounted on a monopod or when in free movement on a tripod. On a stable, locked down platform or tripod, VR needs to be switched off, else the VR system will in some cases cause unnecessary shake and actually introduce blur.


[ Nikon D50 and Nikon 105mm f/2.8G AF-S VR Micro-Nikkor ]
[ 1/20s f/4 105mm ISO800 ]

The VR-II system allows stable, shake free shooting at up to 4 stops slower than normal shutter speeds. In practice, you could get sharp photos up to a ridiculously marginal shutter speed of 1/20s, and this is on a 105mm lens (the rule of thumb would have it at a minimum of 1/100s or 1/125s to avoid camera shake). The maximum effectiveness decreases as you get into closer focusing distance, but it is already a big help when shooting headshots and distant subjects handheld. In the macro range the effectiveness of VR can go down to as little as 1 stop worth of advantage. That one extra stop still means you can shoot at slower shutter speeds than normal but get acceptable results, or better, when combined with good handholding technique and AF-C focusing mode (this last one to correct for the forward and back movement that throws off macros and for which VR cannot correct). So for macros, in a pinch, when it is not possible to use a tripod, VR is a nice feature to have in your pocket.

* Battery Life

To get an idea of the impact that the VR system has on battery life, we tested a fully charged EN-EL3 battery with a Nikon D50. We had autofocus on and set at AF-A, Single AF mode, with the AF Assist lamp turned on. Image review was off but images were reviewed from time to time in what would be representative of normal use. This got us a total of only 218 shots on a single charge. We could probably have gotten in more shots if the AF Assist lamp had been disabled, since it is being blocked by the lens, hence it was not being useful anyway. Still, there is reason enough to consider getting extra batteries or a battery grip to supply the VR system with the needed power for a long shooting day.

Compatibility

The Nikon 105mm f/2.8 VR Micro is a G lens, and works with a limited number of later model Nikon F mount film bodies that are able to use Nikkor G lenses, but is compatible with all Nikon digital SLR bodies.

Conclusion

With all the badges it wears (AF-S, SWM, ED, N, VR), you could easily dismiss the Nikon 105mm f/2.8 VR as an overhyped "flower" lens. But there is more substance to it than even the hype suggests. The lens makes it easy to get sharpness on the subject and a smooth backdrop as a bonus. As a macro lens, it is unique in providing vibration reduction for those hard-to-get unstable shooting situations. As a portrait and tele lens, it is one of the few f/2.8 lenses that you can get with VR for the price.

Is it worth the premium? It all depends on how serious you are with your "flower" lenses.

For more concise technical reviews, check out:

Ghislain Simard reviews the Nikon 105mm f/2.8 G IF-ED AF-S VR Micro-Nikkor
Bjørn Rørslett reviews the Nikon 105mm f/2.8 G IF-ED AF-S VR Micro-Nikkor

[ Sample photos were shot with the lens being reviewed, attached to a Nikon D50 digital SLR. Photos of the product were shot with a Sony V3. ]

5.21.2006

CompactDrive PD70X User Report

Backing Up On The Cheap. Way Cheap.

If you are a serious digital shutterbug, you will no doubt be familiar with the problem: you are away from home or on a long trip, and however discriminatory you are with the photos that you keep on your cards, you eventually run out of flash memory.

If you can, you carry a laptop around and download your photos to its hard drive. But in some cases you may find that carrying a laptop around is at best inconvenient or at worst not possible.

You need not fret over that problem anymore, since device makers of all scales have heard your laments and now offer mobile hard drive-based photo backup solutions that do not need to be attached to a laptop and are available across the price scale. Somewhat at the top of the heap of the bottom end of this scale is where you will find the CompactDrive PD70X. At the fraction of the cost of an iPod, you can get something that is a fraction of an iPod and its ilk: the fraction that backs up photos.

You can get the battery-powered CompactDrive PD70X as a basic shell and install any 2.5 inch notebook hard drive within the 9.5mm thickness required (most are that thick, so usually no worries). You also need to add four Nickel Metal Hydride (NiMH) AA-sized batteries before you are locked and loaded and ready to take this to the field.

Build

CompactDrive's manufacturer claims that the PD70X is a more durable version of their PD7X. As they say, everything is relative. The body is made of thick aluminum held together in places with screws. On either end, there are plastic ends with doors for the batteries on one and the card reader slots on the other. The battery door, despite having been 'reinforced', still feels flimsy. When closed, the batteries in the bay seem to push on the door, and the door does not quite fit flush with the case. The card reader door closes well enough and has a positive locking action. The window over the LCD is made of clear plastic and scratches easily.

Your hard drive, with all of its precious contents, is not shock-protected in any way inside the CompactDrive, and CompactDrive claims no special protection. It is probably no less protected than the hard drive in an Apple iPod, but it could take just one hard fall with a copy in progress to mess up the drive.

I have not attempted it, but it seems if the PD70X ever fell on either of its plasticky ends, it would break. A padded case is included, and one would do well to keep the CompactDrive in the case at all times.



Handling

Control is accomplished through a three-way rocker switch that can be rocked left and right and pushed down. The LCD does not say very clearly what the rocker switch will do at any given time, but I managed to figure out how to copy and check backups by trial and error. This is not down to the intuitiveness of the interface but more because there are so few functions to stumble on.

The LCD is clear enough both indoors and outdoors but is not backlit. In normal operation it at all times displays a battery power meter whose accuracy is suspect. Even from fully charged, it unfortunately often fluctuates from fully charged level down to empty while copying is in progress, then goes back to fully charged when the copying is completed. When in ready state, the LCD also shows the space used in the hard drive, and rocking the switch down/left lets you browse through the numbered backup folders sequentially. While copying, it shows the progress of copying by counting up the number of files copied and the amount in Megabytes copied. When charging, it shows only a counter, which counts up the minutes elapsed, just to let you know how long it took to fully charge the batteries, which is great for reviewers but maybe less useful for actual users.

The CompactDrive has only two card reader slots, but both can read a number of different card formats. The top slot can read Memory Stick, Memory Stick Pro, XD PictureCard, SecureDigital and MultiMediaCard formats. The bottom slot can read Compactflash Type 1 and 2 (hence MicroDrive) formats. SmartMedia users are on their own.



Copying a card, thankfully, is a no-brainer. If you turn on the CompactDrive with a card already in one of the card reader slots, it will automatically initiate a copy operation without any intervention. If you need to copy in a hurry, pressing down on the rocker once starts the copy operation right away. The CompactDrive will happily copy any and all contents on the card into a new, sequentially numbered folder. You can initiate a copy again on the same drive and you can have as many backups as you want.

To get all your backed up files, you can connect the CompactDrive to a computer through the mini-USB port (a USB cable is provided). When connected to a PC running Windows XP, the CompactDrive shows up as a removable drive that you can browse. Unfortunately you will have to browse quickly, as the drive draws power from the batteries instead of leeching power from the computer when connected through USB. If you need to hook the CompactDrive up to your computer for prolonged periods, you will need to break out the included AC power adapter and find a spare outlet for it.

As a bonus, you can use the CompactDrive as a card reader. If a card is inserted in one of the card reader slots, it will show up as a second removable drive.

Performance

We tested the CompactDrive PD70X for battery charge time, battery life and copying speed. Overall the results were very good for this class of device, though we could not get the same results as claimed on the box. In all the tests we used an IBM-era Travelstar 40GB 4200RPM laptop drive.

* Battery Charge Time

The CompactDrive has a built-in quick charger that has been tested on NiMH AA batteries up to 2500mAh. On average, charging a set of four Energizer 2500mAh NiMH AA batteries takes 239 minutes, just a little under 4 hours.

* Battery Life

We tested the battery life of a set of four Energizer 2500mAh NiMH AA batteries by repeatedly copying a Toshiba 1GB SD card and a Toshiba 512MB SD card alternately to see how many GB of memory it could copy before finally running out of power to do a complete copy. We started the test with the batteries fully charged through the built in quick charger. In between copy operations, we turned off the CompactDrive.

We were each able to copy the 1GB and the 512MB SD cards 21 times, for a total of 31.5 GB memory copied on a single charge, and a total of 1 hour and 41 minutes of copying time before the CompactDrive issued the "Change the batteries" (No.20) error.

* Copying Speed

We tested copying times on a variety of flash cards to see if the CompactDrive could hold up to the 1GB per minute claim on the box. Timings listed below were done with a hand-operated digital stopwatch. The timing was started simultaneous with pushing the rocker button to begin copying, and then stopped when the OK sign comes up on the status LCD. Flash memory cards were loaded nearly up to the maximum with a mix of JPEG Fine, JPEG Basic and Nikon RAW (NEF) files to replicate a full memory card as it would be filled up in typical usage. For each kind of media, the average of ten runs was taken.

Flash Memory Card TypeCapacityAverage Copy Time
Toshiba/Kingston/Viking SD512 MB01:38.7
Toshiba SD1 GB03:11.8
Sandisk Ultra II SD1 GB03:09.9

For SD flash memory, a 1GB card, at a little over 3 minutes copying time, actually took three times longer to copy than claimed. As one might expect, a smaller 512MB card gets copied faster by a few seconds. But surprisingly, it mattered little whether you used faster rated flash memory, such as the Sandisk Ultra II cards, which probably means that the CompactDrive may not even able to read the SD cards at its maximum speed.

[ At this time we do not have any timings for CompactFlash memory, but the table above will be updated once data is gathered. ]

A Few Nits to Pick

While doing the performance tests, we encountered no less than 5 instances where the CompactDrive failed to copy a card, ominously reporting a "No. 12" error ("The memory card is not compatible"). This went away on its own when we repeatedly tried to copy the same card, but not before we were already resigned to having broken our new toy and corrupted our card at the same time.

Despite this glitch, the CompactDrive should serve you well enough, until that crucial moment when all your cards are full and a decisive moment is coming up, and the CompactDrive refuses to copy any of your cards. I would bet by then that you will wish you had saved up for something more expensive, but maybe 90% of the time you will not have to face this bout of buyer's remorse.

There are a few other "gotchas" with this drive:
1. The CompactDrive cannot draw power through USB. When connected, it has to run off the batteries, or else needs to be connected to the included AC power adapter.
2. The unit cannot be used in running mode or connected to a PC while charging the batteries. If you turn it on, it will switch to running mode and stop charging.

Conclusion

The CompactDrive PD70X does what you need it to do, which is back up your photos, quick, dirty, and on the cheap. But as the saying goes, you get what you pay for. If this is the mobile photo backup solution within your means, you need to be ready to handle the drive with kid gloves all the time and perhaps even tolerate the occasional read error.

[ Product photos were taken with a Nikon D50. ]

Twitter Delicious Facebook Digg Stumbleupon Favorites More

 
Design by Free WordPress Themes | Bloggerized by Lasantha - Premium Blogger Themes | Best CD Rates