Canon EF 300mm f/4L IS USM Telephoto Lens for Canon SLR Cameras

Sale! Canon EF 300mm f/4L IS USM Telephoto Lens for Canon SLR Cameras

• EF mount; telephoto lens
• Ultra-low Dispersion glass with Fluorite elements; inner focusing ring; full-time manual focus; image stabilizer
• 300mm focal length
• f/4 maximum aperture
• Micro UltraSonic Motor (USM)

• Canon EF 300mm f/4L IS USM Telephoto Lens for Canon SLR Cameras
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• Canon EF 300mm f/4L IS USM Telephoto Lens for Canon SLR Cameras > Canon > 2530A017 > B00009R6WW

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Specifications Type: Super-telephoto Construction: 15 elements in 11 groups (UD glass in G2, G5) View of Angle: 8 degrees 15' Aperture Range: f/4-f/32 Closest Focusing Distance: 4.9 ft. (1.5 m) Shooting Distance Range: 4.9/11.5 ft. (1.5 m/3.5 m) to infinity Filter Size: 77mm Function: AF, AE operation, Auto Aperture, Full Aperture Metering, Manual Focus also possible IS Max Correctable Angle: +/-0.5 degrees (at infinity) IS Function: Stabilizer Mode 1 (bidirectional image stabilization); Stabilizer Mode 2 (unidirectional image stabilization) AF System: Rear-group focusing, with Ultrasonic Motor (USM) Diaphragm: Pulse control system using Electromagnetic Diaphragm (EMD) Coating: Super Spectra Dimensions: 3.5 diameter x 8.7 length (90mm x 221mm) Weight: 42.3 oz (1.2 kg) Lens Hood: Built-in (Locks when pulled out) Compact L-series telephoto lens with an Image Stabilizer which compensates for camera shake with the equivalent effect of a shutter speed two stops faster. Two Image Stabilizer modes are provided: Stabilizer Mode 1 (the same mode featured on the EF 75-300mm f/4-5.6 IS USM) and the new Stabilizer Mode 2 which steadies the image during horizontal or vertical panning. Mode 2 detects the panning direction automatically. The closest focusing distance is 4.9 feet (1.5 m).

( Product Infomation Posted On Time : Apr 01, 2012 06:20:39 View Last Update Infomation At Amazon)

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Garmin Forerunner 201 Waterproof Running GPS

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Post Date : Jan 28, 2012 08:38:48
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Amazon.com Review Combining powerful performance-tracking features with a GPS receiver, the Garmin Forerunner 201 offers runners and hikers a unique way to track their exercise regimens and goals. Unlike its main competitor, Timex's BodyLink sport monitoring system, the Forerunner 201 integrates the GPS receiver into a single body (BodyLink has separate housings for watch and GPS).

101 201 301 1. Allows you to set up profiles for running, biking, and another sport. 2. Set up workouts with specific durations and targets (speed or heart rate). Speed Pace Distance Calories burned Heart rate Sports profiles1 Advanced workouts2 PC interface (serial) (USB) Analyze workout data on PC Size (inches, WxDxH) 3.3 x .9 x 1.7 3.3 x .7 x 1.7 3.3 x .7 x 1.7 Weight (ounces, with batteries) 2.6 2.75 2.75 Batteries 2 AAAs, 15 hours Rechargeable, 15 hours Rechargeable, 14 hours

At first, the device felt a little bulky on my wrist, both in weight and in size (it measures 3.26 by 1.71 by 0.69 inches). But it really is light enough (less than 3 ounces) that it felt comfortable and transparent. I did, however, position the band a bit higher up my arm to ensure full mobility of my wrist, as the length of the Forerunner tended to get in its way.

The large display--with equally large, easy-to-read characters--helps you avoid having to squint at the readout. Just a quick glance at your numbers and you'll maintain your training concentration. The six rubber buttons on the front of the chassis are easy to access (unless you're wearing bulky gloves). I easily got the promised 13 hours out of the rechargeable lithium-ion battery. At the end of the day, I'd just recharge it for around two hours and it would be ready for me the next morning.

While this is definitely a workable GPS receiver, the Forerunner is slim on overall GPS features--which is not to its detriment (think of it as a performance monitor with a dash of GPS). That said, the Forerunner was able to pick up a GPS signal just about wherever I went outside (though it had very slight hiccups in the center of downtown). But if you're looking for a full-fledged tracking device, the Forerunner isn't for you. (You'll want to start with a basic GPS unit like Garmin's eTrex.)

The Forerunner 201 has a variety of helpful tracking, monitoring, and navigational features. The History function enables you to view your workout statistics broken down by individual days, cumulative weeks, or your entire workout history (if you track different workouts during the same day, they'll be broken out as different laps). You can even view a map of your route. And much like other GPS units, you can save waypoints (called "locations" in Forerunner parlance) to mark the coordinates of a place you want to return to later.

Most interesting is the Virtual Partner mode, which enables you to set goals for a workout which will then be completed by a digital character displayed on the Forerunner's screen. You can then see how far off the time, pace, or distance you are of your virtual training buddy's; your digital character even stops when you do (though the buddy keeps on going). I found that, unless you've got a good idea as to your pace or distance, you'll have a couple of trial-and-error training sessions to get in sync with your buddy. I cut short my first attempt after my buddy got so far ahead of me that he disappeared off the screen (which I'd like to believe was not due to my woeful pace).

I was disappointed at not having the LogBook software, which enables you to keep a journal of your exercise activities (it was not available at the time of this test). But overall, the Forerunner 201 is a very useful exercise-monitoring system that will be prized by anyone involved in serious physical training. --Agen G.N. Schmitz

Auto Menu: Timer pauses when you stop running. Auto lap logs your performance over a predetermined distance.

History: Review training history by day or week.

Map: Navigate back to the start or to a stored location.

Virtual Partner: Set time, pace, and distance goals, and train with a "virtual partner."

Pros:

• Loaded with performance-tracking features for the serious athlete
• GPS functionality a bonus, especially in referring back to previous routes
• Virtual Partner feature offers a fun, competitive way to keep you concentrated on training

Cons:

• Lack of Logbook software at time of test
• Virtual Partner feature takes some trial-and-error adjustments

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