Best Value DSLR - Sony A58

Started 5 months ago | Discussions thread
tbcass
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You're post is full of innacuracies
In reply to Midwest, 5 months ago

Midwest wrote:

In-body stabilization only makes any sense whatsoever on a camera with an EVF. Not to say that it is better than optical, it's probably not - but at least with an EVF it gives a stabiized view through the viewfinder and the AF and metering are also working with a stabilized image.

Not true. IBIS only kicks in the instant the shutter is pressed. Sony and others made numerous OVF cameras that had IBIS. While it's true the image may be shaky it just means you have to concentrate more on holding the camera steady like we did before IS even existed. A steady image in the viewfinder is one of the advantages of IBIS.

On a DSLR with IBIS, the viewfinder (especially at longer focal lengths) is going to be twitchy and jerky and shaky because nothing gets stabilized except the image recorded by the sensor. The photographer has to work with an unstabilized, twitchy image and so do the AF sensors and metering sensors. Is it any surprise that the Pentax DSLRs with their IBIS systems continue to lag behind in AF tracking? Not to me. Their AF sensors have a tough row to hoe. How can they lock in and track something that's in constant motion?

How little you understand about cameras and the way they work. IBIS does not have any detrimental effect on the AF or metering because it kicks in only at the instant the photo is taken. On a traditional DSLR the mirror flips up so AF and metering functions do not function then either. In either case the moment is so brief it has no detrimental effect.

With optical stabilization on a DSLR, the viewfinder and the sensors all get the benefit of a stabilized view of the subject which is an advantage to the user and to the sensors. There is a reason Canon and Nikon DSLR's have optical stabilization, it's because it is functionally the only way to do it that makes sense. When I bought my first DSLR (a Canon) at first I despaired when I found out I could have gotten one (Pentax) with IBIS; now that I understand the functional difference, I am more than happy with my choice.

I'm glad for you but you were wrong about the IBIS being a problem.

Saying that the A58's IBIS is an advantage only serves to drive home that it is not a DSLR; it's IBIS would be a DISadvantage on a camera that is really a DSLR.

No, you are wrong.

So it's not a DSLR, there's no shame in that so why do some people keep insisting it is one? If someone wants a DSLR so badly then there are plenty they can buy. Not from Sony, but there's a good selection from Canon and Nikon.

In the traditional sense an SLT is not a DSLR but since there is no official meaning for the term people can call it one if they like. Of all the things you wrote it's probably the only thing that has even a bit of accuracy. Other than that you really have no idea what you are talking about. As an old timer I don't think an SLT is a true DSLR but I won't bother telling others they shouldn't call it one because I don't care.

One last thing. There have been some tests done using 2 versions of the same lens, one with OIS and one without. In those tests it has been shown that lenses with OIS have poorer optical properties due to the extra unstable lens. This was true even when IS was turned off. Optical IS also uses up battery power so in the end, while useful it is not the panacea many people think it is.

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Tom
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Miss use of the ability to do 100% pixel peeping is the bane of digital photography because it causes people to fret over inconsequential issues.
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