Canon EF 70-300mm f/4-5.6 L IS USM

Designed to deliver ultra-high quality images along with lightning fast operation, the new Canon EF 70-300 f/4-5.6L IS USM telephoto zoom lens brings a favorite zoom range to the celebrated Canon L-series of lenses. It features two Ultra Low Dispersion (UD) elements for improved image quality and reduced chromatic aberration, incorporates a floating focusing mechanism for sharpness from close up to infinity, plus an IS system that increases usability by approximately four stops. The Image Stabilization system also features a function that allows it to continue to operate, even when used on a rigid tripod. An optional Canon Tripod Mount C (W II) is available as an accessory, for balanced mounting on a tripod or monopod. Gleaming white on its exterior, the lens is dust- and water-resistant, and now also features a newly-developed Fluorine coating that resists smears and fingerprints, and significantly eases lens cleaning. For any serious and critical EOS user, this new L-series lens represents an excellent and portable solution to versatile telephoto lens shooting.

Specifications,

Focal Length & Maximum Aperture	70-300mm 1:4-5.6
Diagonal Angle of View	34° - 8° 15'
Focus Adjustment	Lens extension via inner focusing and focus cam plus floating mechanism
Closest Focusing Distance	1.2m/ 3.9ft
Filter Size	67 mm dia., P=0.75 mm /1 filter
Max. Diameter x Length, Weight	3.5 x 5.6 in, 2.31 lbs. / 89 x 143mm, 1050g

Difference between a Canon EF lens when compared to a EF-S lens

Pre 2003, all Canon digital SLR cameras were compatible with a standardized EF lens. EF stands for Electro-Focus and refers to its lens mount. You can recognize EF lenses by its red dot, where you line up the dot on the lens mount to a similar looking one on the camera body.

However, if your Canon camera lens has both a red dot and a white square to line up the body to when mounting the lens, then it is an EF-S lens. EF-S is stands for Short Back Focus. EF-S lenses were first developed in 2003, when Canon bought out its EOS 300D/Digital Rebel/Kiss range of digital SLR cameras.

What are the main differences between an EF and EF-S lens?

• The differences between the two lenses are purely cosmetic. The EF-S lens has been made to sit deeper into the camera's body when connected. Hence the reason EF-S stands for short back focus, as there is less space between the lens and the sensor.
• The idea behind developing EF-S lenses in the first place, was to create a more cost effective solution (especially when talking about wide angle zoom lens), aimed at the mid range SLR camera user. Therefore, this is usually considered a good thing as far as beginners are concerned.
• Many experts have noticed no differences in the end result of the actual photograph.

Are there any disadvantages to EF-S lens?

• The main disadvantage to using an EF-S lens is that they are only compatible with Canon EOS cameras that contain both a red dot and a white square on the lens mount. The red dot means the camera supports EF-S lenses. Whereas the white square means it also supports a standard EF lens. Therefore, if in future you want to upgrade your digital SLR camera to a more professional model, you may need to also replace any lens that is an EF-S model

Considering this limitation, should you buy an EF-S lens?

• If cost is the main consideration when purchasing a quality lens, then yes certainly think about purchasing an EF-S lens. When compared to Canon's L (professional) series, it was very low cost as well. Especially for someone first starting out in SLR photography.
• As explained earlier, if you're planning to upgrade your camera to a more professional body any time in the future, then you may want to stick to buying an EF lens, for compatibility reasons. EF lenses are compatible with all Canon EOS camera bodies. Whereas, EF-S is only compatible with mid range camera's (EOS 20D and Digital Rebel bodies) that support them.

How to know if your digital SLR camera is compatible with an EF-S lens?

• Have a look on your digital SLR camera where the lens mounts onto the body. If you see a red circle and a white dot / square, then your camera is compatible with EF-S lenses

 

Canon EOS 60D

The Canon EOS 60D is a digital single-lens reflex camera from Canon. It is part of the Canon EOS line of cameras and succeeds the EOS 50D. It was publicly announced on August 26, 2010 with a suggested retail price of US$1099.00

Canon's X0D series has throughout its life appealed to a wide range of photographers, from enthusiasts and semi-pros through to some pros who appreciated having a lightweight option. Each model offered a high enough specification (usually in terms of build quality and AF sophistication) to ensure it was both aspirational and attainable for users who had out-grown their Rebel/XX0D series. However, the feature set always left a sizeable gap below the company's full-blown 'pro' models.

The arrival of the EOS 7D, with its highly configurable 19-point AF system and 8 frames per second continuous shooting capability changed much of this - here was a 'mini 1D' that drew the attention of many people who previously would have been X0D customers. However, the price tag (a 30% premium over the 50D at launch) pushed it beyond the reach of most people who weren't making at least a bit of money from their photography.

The 50D (and by extension the X0D range) was starting to look somewhat redundant: expensive (and in some ways outdated) compared to the rebel T2i (EOS 550D), underpowered compared to the EOS 7D. It seemed obvious that Canon needed something to balance out the EOS range to fill the big gap between the Rebel and the 7D. And so we have this, the EOS 60D.

With the 60D Canon has unashamedly moved the X0D range out of the 'semi pro' bracket and instead focused on the enthusiast photographer looking to upgrade from their Rebel. As a result, it's not the obvious continuation of the 30D - 40D - 50D pattern that its naming might suggest. Instead it sits pretty well precisely in the same market position as was once-upon-a-time occupied by the 'Elan' series of 35mm film SLRs (which in Europe were not-so-coincidentally given double-digit model numbers).

So gone is the magnesium alloy construction that featured in previous models, replaced by a lighter weight plastic shell. Naturally the 60D gains some key 'step up' features from the Rebel line (top panel LCD, rear control dial, higher burst rate), including a few that have trickled down from the EOS 7D. There's also a video- (and tripod-) friendly 3:2 ratio articulated LCD. In imaging terms it brings the EOS mid-range in line with those above and below by upping the sensor resolution to around 18MP and adding full HD movie capture.

The EOS 60D also gains a couple of brand-new features of its own. There's now a wide range of color variations (or 'Ambiences') which can be applied to the image when using the scene modes, and whose effect can be previewed on screen in Live View. The 60D also finally gains the ability to convert raw files to jpeg in-camera, including the option to correct for lens aberrations including distortion and chromatic aberration. As an added bonus, you can retrospectively apply new 'Creative Filters' to files you've shot, including 'Grainy Black and White' and 'Toy Camera' looks.

And so, from a spec and feature point of view, the EOS 60D sits almost exactly half-way between the EOS 550D and the EOS 7D, with a few new tricks of its own. Which, we think, is exactly where it should be (regardless of the inevitable howls of protest at the apparent 'dumbing down' of the venerable X0D line).

Key features

• 18MP APS-C CMOS sensor
• ISO 100-6400 (expandable to 12,800)
• 5.3 fps continuous shooting
• 1080p HD video recording with manual controls
• SD / SDHC / SDXC storage
• In-camera raw development
• Subject modes with 'Ambience Selection' (Standard, Vivid, Soft, Warm, Intense, Cool, Brighter, Darker and Monochrome)
• In-camera Creative Filters (special effects)
• Fully articulated 3.0" screen (3:2)