Canon 6845A004 Review, Compare, Prices, Discounts

Tuesday, January 26th, 2010 at 11:18 am

Canon 6845A004 Review, Compare, Prices, Discounts.

Product: Canon 6845A004

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The 1.4X II teleconverter is a modest update to Canon's earlier 1.4X TC. The sign II allows this extender to be stacked with another of Canon's extenders (either another 1.4X II or the 2X II) without having to separate the two with an extension tube (although the loss of sharpness from stacking extenders may not be acceptable to you) . Otherwise, the quality of the newer 1.4X II is supposed to be very similar to the older model, which I've never owned.

The 1.4X II is a spacious contrivance to extend the advance of compatible lenses. Mark that not every Canon lens is compatible with this extender. The following is from Canon's Web site: "This tele extender can be worn with fixed focal length lenses 135mm and longer (except the 135mm f/2.8 Softfocus lens), and the EF 70-200 f/2.8L, 70-200 f/2.8L IS, 70-200 f/4.0L, and 100-400 f/4.5-5.6L IS zoom lenses."

I exhaust it frequently with my Canon 70-200mm f/2.8L IS, which turns it into a 98-280mm zoom. The extra approach it adds is not spacious, but it's very welcome when I unprejudiced need a runt more than what the lens alone can give me.

I've found no appreciable loss in sharpness from using the 1.4X. Of course, any extender is going to slit sharpness to some degree, but with normal examination, I can't distinguish photos taken with the 70-200mm that spend the 1.4X from those that don't. The fact that the 70-200mm f/2.8L is a very intriguing lens to open with helps in this department.

Using the 1.4X decreases your lens' widest aperture 'capability' by one end. With some lenses, that can be more vital than it appears on the surface; when using a non-pro Canon body (such as my 20D) the lens must have a minimum wide-open aperture 'capability' of f/5.6 for autofocus to work. The lens doesn't have to be state at f/5.6, it unprejudiced has to be 'capable' of at least f/5.6 after adjusting for the one conclude loss from the 1.4X. That means with some camera/lens combinations, adding the 1.4X will force you to focus all of your shots manually. (Note: There is a known 'fix' for this that restores autofocus. I've never needed to try it, but it involves taping over some connector pins on the 1.4X to fool the camera body. Recede with caution if you try this, and do a Google search to learn how to do it apt before attempting it.)

The 1.4X also reduces focus hasten very slightly. I've only old-fashioned it on my 70-200mm IS, which has Canon's USM and is a fast-focusing lens to open with, but the decrease in hurry is so petite I really don't peep it. And it does not affect IS (Image Stabilization) at all.

The 1.4X is built to the quality of Canon's L-series lenses, which means that it is weather sealed and will sustain a Canon pro body and L-series lens weather sealed when old with them.

If you're considering this extender, you're probably also considering Canon's 2X II teleconverter. I do not occupy the 2X but did a lot of research on it before ultimately deciding to go with the 1.4X. The 2X decreases your aperture by two stops, and is reported to have a noticable decrease in sharpness--more than some photographers are willing to live with. On the other hand, I've never read a review that complained about the loss of sharpness from the 1.4X.

If you've already invested a lot of money in telephoto lenses, the 1.4X II is a relatively inexpensive design to fetch even more arrive (and value) out of your investment while adding only a modest amount of bulk to your camera bag. Highly recommended.

I have both the 1.4x and 2x teleconverters from Canon. Neither, despite what people say, produces an image that impartial as intriguing as the fresh lens. But images through the 2x are noticably awful from even a casual inspection while images through the 1.4x absorb up very well. Carefully controlled test shots are the easiest plan to really study the problems in this converter. But for the most allotment the 1.4x won't be a liability in sharpness.

The 1.4x loses one terminate of light. So while this does work on a 100mm-400mm f/4.5-5.6 IS L lens, I wouldn't reccommend it. Effect this for the 200mm f/2.8 L, and the 300mm f/2.8 IS L, and any bigger primes you have.

I have aged the 1.4x II extender for over a year. It gives me astounding detail with my 70-200L f/4 lens on a 20D. I expend it mostly for wildlife and butterflies. Dissimilarity is well-behaved with colors that pop. When shooting on a sunny day the shutter speeds are peaceful expeditiously with the f/5.6 and the background is blurred beautifully. In shade areas and vulgar light a tripod is a must! There hasn't been any sacrifice in subject detail. I can ogle individual hairs on butterfly bodies even when shooting wide begin. This is a sizable blueprint to come by closer without paying a distinguished amount for a supertelephoto lens.

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