Would you consider the 70D to be

Started Jul 7, 2013 | Discussions thread
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Re: No
In reply to oklaphotog, Jul 8, 2013

oklaphotog wrote:

Karl Gnter Wnsch wrote:

No 100% viewfinder, slower fps, slower card writing speed, slower card format, less durable shutter, less viewfinder magnification, less usable body (lacking many direct access controls), smaller, lacks the dedicated AF processor and some important AF modes - so no, the 70D is for the most part quite a severe downgrade on the 7D...

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Karl Günter Wünsch

I would agree. For me the biggest kicker is the plastic body.

Frankly, I prefer the composite body. Modern plastics are extremely resilient, dissipate impact shock better, are lighter, are far less prone to cracking and denting, compared to magnesium. Magnesium is very stiff, but as a result it's not as resilient so it's more prone to cracking. It's also rather brittle. Plus, paint can chip and scratch off a magnesium body, which isn't an issue with a composite body.

Here are a few examples of cracked magnesium bodies:

View: original size

View: original size

View: original size

Many people may not realize this, but all of Canon's prosumer magnesium DSLR bodies actually have plastic bottom plates. This includes the Canon 7D. The following image shows what happens when a Canon 7D is dropped at a location that impacts both the plastic body panel and one of the magnesium body panels:

View: original size

As you can see, due to the brittle and less-resilient nature of magnesium, the magnesium panel cracked and broke off, whereas the plastic panel just suffered some scratches and a compression dent, but it did not break or crack. So magnesium isn't quite what it's cracked up to be (no pun intended). My point is that one should not have a knee-jerk reaction and automatically assume that a plastic body is inferior, or that a magnesium body is superior.

I also like the fact that plastics are lighter. No point in lugging around more weight than you have to.

Plastic is also widely used in modern military weaponry, again for its light weight, resilience, shock-dissipating properties, etc.

Plastic-bodied Smith and Wesson M&P15

Plastic-bodied Smith and Wesson M&P15

Heckler & Koch HK416 (top) and Tavor-21 (bottom) assault rifles, both using plastic composite bodies.

Of course, I understand some people prefer the "feel" of magnesium under their hands. But I think that's kind of weird, too, since your hands are mostly on the rubber grip anyways. And while people seem to look down on plastic when used in the camera body, apparently no one seems to be bothered by the fact that every hotshoe flash made by every manufacturer is made of plastic!  Buying a Canon 600EX-RT flash?  Plastic body.  Nikon SB-910 flash?  Plastic body.  Obviously, all these plastic-bodied flashes are plenty durable and resilient, and no one is petitioning camera manufacturers to switch to metal or magnesium-bodied speedlites.

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