But it doesn't change the fact that it weighs 810g... the same as my
Canyon 5D.
Chuck Norcutt
khen lim wrote:
> On 21/10/2007, C.H.Ling <ch_photo@xxxxxxxxxxxxx> wrote:
>>
>> Smaller sensor means smaller mirror, smaller pentaprism, smaller shutter,
>> less area occupied by the sensor area.... that is enough to make the
>> camera
>> smaller and lighter than the others, right?
>>
>> C.H.Ling
>
>
> It does sound like you're right but I have to disagree. I do wish it was
> this simple. On paper and in principle, a small sensor has a chain benefit
> of everything else being small but once demands on performance become
> higher, these principles will take a hit. In the case of the E-3, this was
> apparent during the development stages.
>
> Let's have a look at that mirror you referred to. The need to offer 1/8000
> sec max shutter speed forces the entire 'direct drive' assembly to be
> re-evaluated and that includes not just the shutter mechanism but also the
> entire mirror box. If a small mirror was first designed to support 1/4000
> sec, doesn't logic suggest that something needs to be done to beef up the
> mirror, change the mirror, toughen the mirror etc etc to help it to cope
> with a speed that is now twice as fast? I think so.
>
> OK. Now let's look at the pentaprism. In the E-3, the development team knew
> of the experiences that many including those here in the List complained
> about 'tight,' tunnel-like etc etc. How do you bring in more light to
> brighten it? How do you enlarge the view so that people stop complaining
> it's tunnel like? It's not as simple as moving a few rows in a cinema to
> look at a wider screen. So something needed to be done to the prism itself.
> I will assure you that the first course of action was to retain the same
> prism and try to extract as much as they can without resorting to a larger
> solid glass prism that has higher refractive index and larger light flux.
> What I'm saying here is that we should consider giving the engineers the
> benefit of the doubt that they always have Mobility in their mind and they
> do try their best to get the most without allowing the camera to gain weight
> and/or size.
>
> Next, shutter mechanism. Olympus did succeed in this area as they learned
> the trick from Maitani with the OM. They simplified the mechanism by
> removing as many gears as they could and replace them with a direct
> closer-in-contact cam. This helped to lighten the mechanism BUT once it is
> lighter, it was also more vulnerable in other ways. So the mechanism itself
> had to be toughened also.
>
> One other thing. With all these secondary vibrations coming through, a very
> compact camera body has a larger tendency to send them straight to the
> sensor and cause problems. These harmonic problems cannot be dealt with by
> any in-camera or, worse, in-lens Image Stabilisation system. Simply put, the
> gyro measures a completely different pattern of vibrations. So if we are to
> have a compact body, the components are going to be more tightly tucked in
> the way of one another. And this brings about additional solutions to help
> create paths for these vibrations to be channeled away from the sensor.
> These paths can add weight and girth.
>
> There are a lot of 'black-art' type sciences involved today in the making of
> a DSLR that make it so different from even a high-end film SLR such as the
> OM-4. There is every wish within Olympus to aim for that and they're trying
> to do that. Until technologies are available that give the necessary
> breakthrough, we just have to soldier on with whatever improvements that
> come their way. After all look at every other 'complex' industry like
> automobiles...to get to where we are with CVT, air-con that works all the
> time, auto cylinder shutdown, commonrail diesel etc etc etc, it took the
> industry decades to achieve. Those who lived during periods where these
> weren't at all possible technologically would probably have moaned in the
> way we all are about our cameras today.
>
> So take heart. They will come. Cut them some slack.
>
> K.
>
>
>
>
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