Web Analytics RiceHigh's Pentax Blog: Sony A57 is Announced

Tuesday, March 13, 2012

Sony A57 is Announced



See the official feature highlights and full specifications here:-

http://store.sony.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10551&storeId=10151&langId=-1&productId=8198552921666433223#specifications

The sensor is the same one used in the K-5 and K-01. It has a fine and large EVF with 100% coverage as EVF is actually the policy of Sony. Furthermore, the Full HD 1080p at 60 frames (per second) capability should be noted. As usual, Sony SLT is able to continuous auto-focusing and track the subject during video recording. So, every time whenever some Pentax boys still told that K-01 is new and strong in video recording, this really makes me laugh! :-D Indeed, what to rave about actually? H.264 motion compression in MP4 was what could be found in the old Pentax Optio MX, which I also had. Besides, re-focusing upon the press of a button was what the Canon DSLRs could do a few years ago! Nonetheless, we should also note that lately PF has commented that the AF is really slow under the video mode, too.

Of course, there are a lot of features that exist in the A57 but are missing from the K-01. The size and weight of the two bodies are close. Price wise I don't think the difference is huge. So, if you are just not a die-hard old fan of Pentax but have to choose a *large* new interchangeable lens camera based on features, price and performance, what would you choose? (I think the answer is clear cut!)

Comments (29)

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bandymelis's avatar

bandymelis · 681 weeks ago

And the videos that use autofocus during the movie taking make me laugh.
Only manually focused videos using a good follow focus system look normally.
Autofocus makes the thing look amateur, same as other settings in auto (ISO, Sv, Av).
4 replies · active 681 weeks ago
Thes Sony really looks nice. If only it was available with k-mount
1 reply · active 681 weeks ago
Dave's clichés's avatar

Dave's clichés · 681 weeks ago

It is with some stretch of the imagination that the author of this article is comparing the Sony A57 to the Pentax K01. This is a DSLR and as such it's not at all pitched against the K01,this is a bad comparison! If one is going to compare,then it must be like to like.
An other thing, I've noticed an awful lot of criticism from disappointed Sony DSLR owners of the EVF system taking over from the OVF, there are already many jumping ship, we have not yet seen the new EVF Sonys being a great success so far!
The K01, as always at launch, is a bit expensive, but after a while the price will drop and I am sure like the K5 against the D7000 (the K5 is 2/3 rds the price of the K7000 now), the great attraction will be that it will be one of the bargain compacts taking thousands of Pentax lens without adapters giving DSLR quality photos. OK I would have liked to see a VF whatever it's form.
1 reply · active 681 weeks ago
DPR studio shots aren't bad
http://www.dpreview.com/previews/sonyslta57/5

K01 IQ might be marginally better (due to no SLT mirror), but as overall package (continuous AF in 10 fps, video AF, EVF, tiltable LCD), it falls behind.
Rice -
did it ever occur to you that Sony is financially much more capable? So what is your point in stating that Sony has an offer that in one respect (video AF speed) is better? It is the overall package that counts, and please give the smaller company a break.
Do you think the world would be better with only Sony, Canon and Nikon remaining? Reading your blog, I get the impression you think so.
C
1 reply · active 681 weeks ago
Of course Sony is standing behind the EVF...... It's the main manufacturer for this technology. Sony will make $ with every single EVF that is being used on a camera. So Sony has a profitable objective to push for the SLT /mirrorless trend of the camera industry. To most manufacturers, It's replacement cost to the mirror and pentaprism.. and EVF is an electronic component that is also subject for replacement...... To us, do you want to pay the replacement of the EVF after the warranty period or the replacement of a mirror flipper. Pick your poison.
1 reply · active 681 weeks ago
> To anybody with the slightest idea of engineering it is obvious that SLT saves a lot of money compared to DSLR.
Not that much. They still has PDAF array that needs to be adjusted. The translucent mirror isn't particularly cheap too.

> Resolution >10MP
Not that much again. The 5Mp is enough. SLR OVFs are also limited by their matte focusing screens and the better for MF means the lesser resolution.

> dynamic range >20bit
Don't confuse human overall scene DR and the instant DR of human vision. The latter is limited by 10-16 (depends on the moon phase, cannot be measured since it can vary during a day, etc) stops and it's the case when we are looking through the VF. Today EVF DR is limited by sensor LV output, that only has 6-8 EV stops DR capability. In the near future Sony (and Samsung too) will introduce larger sized sensor with RGBW pattern, where the W pixel will meter luminosity level and this will help to increase DR capability (at the cost of color resolution though). In that case the EVF may become the limiting factor (16.6 stops if declared 1:100000 contrast for OLED VF values are truth), but this is avoidable with the use of some DR compressing methods, like exposure fusion, etc.

Anyway, if you will shoot mostly with AF, then EVF is not your choice today. Even the latest sony NEX-7 one is still inferior IQ-wise to even tunnel like penta-mirror OVFs, it's just not ready yet. And the A57 VF is even worse, it's the last generation LCD EVF from A55, so I would not advise anyone to buy this piece of cr4p.
The only thing where the EVF is actually better choice is MF with focus assists accuracy over APS-C viewfinders.
Sony could make this even better, but they left thing half baked, as usual (I meant better method to choose magnification center without touching the joystick)

But, to say, the EVF of A57 is not that one from A77, NEX-7, etc, but from A55, which is known to be the CRAP.
So, I would nevery advise anyone this camera.
7 replies · active 681 weeks ago
The SLT mirror affect amount of light reaching the sensor. Most kinds of semi transparent mirrors, thin films will have declining transparency with age. The mirror may need to be replaced from time to time adding to the cost of the user.
2 replies · active 681 weeks ago
You lose half a stop of light to the mirror.
The EVF is ok but it can't compare to an OVF and it's a Sony which should scrub it off anyone's list.
But yes it makes more sense than the K-01..but then so does every other camera
RIP Minolta....:(

Long live plastic bodies, EVFs, semi transparent mirrors and etc b@lshits.
Sony should very well be ahead in terms of AF for video use... I had a Sony videocamera from 1991.

The EVF of the a55 was so so... quite good, but not there yet. I'm curious to see how the a57 will be.

I'd probably pick the Pentax though, it just looks so much better.
Pentax backlash's avatar

Pentax backlash · 680 weeks ago

Sony do save money but the buyer does not so what's the point of SLT then?

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