Alphoid

Alphoid

Joined on Jun 24, 2011

Comments

Total: 117, showing: 1 – 20
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In reply to:

Earthlight: Sony and Sigma have managed to pull off someting quite lovely. They are a breath of fresh air in this market.

Sigma needs to start cranking lenses out for the Sony mount. Would that not be a win-win scenario?

@wetsleet Some of the encumbrance of a dSLR. An aluminum tube is quite a bit smaller and lighter than a mirrorbox, pentaprism, etc.

@TheEulerId You changed your statement a bit. My claim is that legacy lenses can work as well with on-sensor PDAF as with dedicated PDAF, if not better. I did not compare optimized vs. unoptimized lenses. Regarding readout, it's already plenty fast enough to read out and integrate:

1. With PDAF lenses, you don't need especially frequent readout. You read distance, and focus.

2. You don't need it over the whole sensor; just near an AF point.

An A7s can do 1280x720 video at 120 fps. An A77ii can do full resolution at 12fps. 12fps is plenty fast for traditional PDAF. 1280x720 corresponds to taking 16%x16% of a 36MP sensor -- which is plenty of area as well. Even CDAF systems work fine there -- the GH1 was 60fps for CDAF. GH2 was 120fps. GH3 was 240fps.

We're way past the point where we have the technology already. We just need integration.

Direct link | Posted on Nov 24, 2014 at 01:29 UTC
In reply to:

Earthlight: Sony and Sigma have managed to pull off someting quite lovely. They are a breath of fresh air in this market.

Sigma needs to start cranking lenses out for the Sony mount. Would that not be a win-win scenario?

@TheEulerID Conversely, the dSLT/dSLR PDAF sensor only receive a fraction of the light of the main sensor. On-sensor PDAF can be substantially more sensitive.

There isn't a relation between pixel size and sensitivity. Per-pixel sensitivity is, of course, better for larger pixels, but overall sensitivity is a function of total surface area. Unless you run into limitations with fill factor or ADC (which modern dSLRs are far from), it doesn't matter whether you have 4 little pixels or 1 big pixel.

If you look at something like the 70D, the on-sensor PDAF has the potential to be *much* more sensitive than an independent sensor.

The question isn't about the dSLT 1/3 stop. It's a question of size, cost, weight, as well as the ability to use a modern, integrated autofocus system as new bodies come out.

Direct link | Posted on Nov 22, 2014 at 16:27 UTC
In reply to:

The outfitter: I wouldn't consider the high end Nikon and Canon flashes "overpriced crap".
The circuitry in them is frighteningly complex (and well made), called upon to direct precise bursts and pulses of high energy through that flash tube many times a second.
What they are is over-engineered, and that comes at a price.
It's not surprising many photographers are turning their backs on all that complexity and opting for simpler, cheaper units.
Unfortunately, Metz was never one for keeping things simple once the dedicated flash wars began.

"overengineered" means poorly engineered. It means the device is heavier and more expensive than it ought to be, with minimal improvement in reliability and functionality. That doesn't help anyone.

The circuitry in flashes isn't rocket science.

Direct link | Posted on Nov 22, 2014 at 02:25 UTC
In reply to:

Alphoid: Looks like I bought my a99 six months too early... This seems like a much better choice for what I do, but probably not worth the $MSRP upgrade. Still, it points to a very good direction

I'll be curious how the autofocus system works. I'll also be curious if it will be good enough to release something like the LA-EA4 without the mirror.

Aside from that -- which will surely be fixed -- it's hard to point out flaws. I lose GPS (but NFC+good cell apps could probably fix that). I prefer the larger A99 battery (but I'd be glad to put it in an external grip). I'm surprised it doesn't have 4k (but I guess that comes with the resolution). I think that might be all.

@draschan Sony has a history of shipping cameras with great specs which are barely usable in practice. I like to wait for reviews. Or play with one myself.

Direct link | Posted on Nov 22, 2014 at 01:21 UTC
In reply to:

Earthlight: Sony and Sigma have managed to pull off someting quite lovely. They are a breath of fresh air in this market.

Sigma needs to start cranking lenses out for the Sony mount. Would that not be a win-win scenario?

@Zeisschen 5 seconds is enough time to miss photos. I take off a lens, and put on a new lens. As is, I take out two A-mount lenses, swap adapter and rear lens cap, take off E-mount lens, and mount A-mount lens+adapter. That's a bit messy.

@TheEulerID That's true for CDAF. On-sensor PDAF and hybrid ought to be okay with screw drive.

Direct link | Posted on Nov 22, 2014 at 01:20 UTC
In reply to:

ekaton: And the A7III will have a touch screen and no AA filter and will be a available in 11 months. Oh, and the A7rII and A7sII will be launched in between.

The cell phone photos have relics from noise reduction, overprocessing, and overcompression. The cameras without AA filters have relics from aliasing. In good light, both are equally crappy. In poor light, of course, the bigger sensors pull ahead. Both are fine for casual shooting, but if I'm spending more than a few hundred dollars on a camera, I expect to not have relics, as with virtually any other modern camera.

Direct link | Posted on Nov 21, 2014 at 20:39 UTC
In reply to:

Earthlight: Sony and Sigma have managed to pull off someting quite lovely. They are a breath of fresh air in this market.

Sigma needs to start cranking lenses out for the Sony mount. Would that not be a win-win scenario?

It's almost pointless. We still need better adapters. $50. Built in screw drive motor, so it supports all lenses. No dSLT mirror. Electrical connection.

I'd take all my A-mount lenses, permanently mount adapters, and switch to E-mount. The $200/$350 per adapter doesn't do it for me. Nor does fumbling switching lenses around with one adapter.

It will happen. If Sony doesn't do it, someone else will.

The A7II is probably the third Sony camera I'm genuinely excited about. The first was the A700, which was brilliant. The RX100 series was the second. This is the third. I'm not sure if I'll buy it or wait for the A7III, and reviews might sway me otherwise, but from the specs, it seems close to a home run.

Direct link | Posted on Nov 21, 2014 at 15:34 UTC
In reply to:

ekaton: And the A7III will have a touch screen and no AA filter and will be a available in 11 months. Oh, and the A7rII and A7sII will be launched in between.

No AA filter. That sounds like a great idea! Sacrifice image quality for slightly better DxO numbers.

Idiots....

I almost bought a Ricoh GR or Nikon A before I saw that many of the photos looked no better than what I get off of my cell phone.

Direct link | Posted on Nov 21, 2014 at 15:25 UTC
In reply to:

Alphoid: Looks like I bought my a99 six months too early... This seems like a much better choice for what I do, but probably not worth the $MSRP upgrade. Still, it points to a very good direction

I'll be curious how the autofocus system works. I'll also be curious if it will be good enough to release something like the LA-EA4 without the mirror.

Aside from that -- which will surely be fixed -- it's hard to point out flaws. I lose GPS (but NFC+good cell apps could probably fix that). I prefer the larger A99 battery (but I'd be glad to put it in an external grip). I'm surprised it doesn't have 4k (but I guess that comes with the resolution). I think that might be all.

New stuff comes out every 6 months, but upgrades I really care about, a bit less often. Perhaps 4-5 years is a bit long for me, but maybe once every 2-3 years.

I was thinking of dumping all my A-mount for a nice, compact, OM-D system, but the A7II seems to fill the gap. It's one of the upgrades I really care about.

Oh well. I'll probably get the A7III. Or maybe I'll sell my A99 if I ever find time to sell stuff (which has never happened before).

Direct link | Posted on Nov 20, 2014 at 12:15 UTC

Looks like I bought my a99 six months too early... This seems like a much better choice for what I do, but probably not worth the $MSRP upgrade. Still, it points to a very good direction

I'll be curious how the autofocus system works. I'll also be curious if it will be good enough to release something like the LA-EA4 without the mirror.

Aside from that -- which will surely be fixed -- it's hard to point out flaws. I lose GPS (but NFC+good cell apps could probably fix that). I prefer the larger A99 battery (but I'd be glad to put it in an external grip). I'm surprised it doesn't have 4k (but I guess that comes with the resolution). I think that might be all.

Direct link | Posted on Nov 20, 2014 at 11:01 UTC as 237th comment | 4 replies
In reply to:

russbarnes: Also, can't believe they've released this before further lenses...

@russbarnes The metering and results are not questionable with the LA-EA1/2/3/4. E-mount and A-mount are designed for cross-compatibility.

Direct link | Posted on Nov 20, 2014 at 10:57 UTC
On Canon PowerShot G7 X Review preview (394 comments in total)

Nice... are we getting a rushed review on the LX100 too? 'cause it's a pretty sexy trio, the RX100III, the G7X, and the LX100.

Direct link | Posted on Nov 12, 2014 at 11:01 UTC as 49th comment | 1 reply
In reply to:

Menneisyys: "For those who prefer desktop computers over tablets Apple also introduced a new iMac with 5K Retina display that offers a whopping 5120 x 2880 screen resolution."

This is THE best news for me. (Even with the $2500 base model only sporting a weakish i5 and a severely underpowered GPU, meaning anyone wanting at least a semi-decent GPU will need to shell out $500 more for the CTO options.)

I REALLY hope the new iMac screens don't use PWM (see http://www.tftcentral.co.uk/articles/pulse_width_modulation.htm ) - that'd pretty much rule it out for me. (I hate the PWM screen of my iMac 2009.)

I'll buy a Dell 5k monitor as soon as they also release a graphics card which is stable, sane (not a 200 watt gaming monster with whirlwind fans), drives it reliably under any system (Mac, Windows, Linux), and generally just works. Ideally, they'll also release a laptop which can drive it. I'm okay with low performance here -- 30Hz, USB, or whatever. I do want it to just work, however.

Right now, the panels look great, but getting them working looks like a disaster.

Direct link | Posted on Oct 16, 2014 at 23:33 UTC
On Google launches Nexus 6 with 13MP and OIS post (101 comments in total)
In reply to:

RedFox88: Google sold off their Motorola phone business a few months ago at a huge loss hanging onto patents.

You know, they bought Motorola for the patents....

Direct link | Posted on Oct 16, 2014 at 01:11 UTC
On 'See Impossible': Canon counts down to... something. article (1667 comments in total)

Either:

1. Something minor
2. A new mirrorless system
3. A lightfield camera

I'm secretly hoping for #3. The 70D was a prototype lightfield camera.

Direct link | Posted on Oct 6, 2014 at 10:11 UTC as 813th comment
On Photokina 2014: Hands on with the Tamron 15-30mm F2.8 article (36 comments in total)

I'm not sure if the premium Tamron thing will play out. Virtually all of their lenses fail with moderately heavy use, and they don't really honor warranties. That's not the kind of reputation higher-end consumers would go for. Moving up-scale from there would either involve dramatically shifting economics on their low-end craptics, and starting to make things out of materials which don't fail with a bit of use, starting to honor warranties, etc. It would break economics on everything they make, and it would take years for reputation to catch up.

Price leader is where they are, and probably where they should stay. Or a clear split in branding.

Direct link | Posted on Sep 18, 2014 at 16:51 UTC as 7th comment | 7 replies
On Photokina 2014: Olympus stand report article (75 comments in total)
In reply to:

duckling: Next time you visit an exhibition put a polarizer in your pocket. It might help with them reflections.

Indeed. I'm consistently disappointed with dpreview's photographic technique...

Direct link | Posted on Sep 18, 2014 at 10:25 UTC
On Relonch brings APS-C image sensor to the iPhone post (40 comments in total)

Not a bad idea. Horrible implementation...

Direct link | Posted on Sep 18, 2014 at 09:04 UTC as 18th comment
On Photokina 2014: Sony stand report article (78 comments in total)

Speaking of photography, this would be a good time for a showcase of your skills. The things-cut-in-half photo was horrific. I'd love to have a nice, high-res shot to appreciate the lens internals.

Direct link | Posted on Sep 17, 2014 at 12:33 UTC as 21st comment | 1 reply

Seems nearly perfect. I'll wait for reviews. A few questions remain:

1. Is it programmable?
2. Does it have full manual controls?
3. Will it break in my pocket after 15 minutes regular use? How is that nice lens protected?

I'd actually much rather have the whole thing be the thickness of the lens, and perhaps fill that extra body with battery. I wouldn't mind a thick phone nearly as much as I would one with a lump sticking out for the most delicate part.

Direct link | Posted on Sep 16, 2014 at 02:09 UTC as 57th comment | 1 reply
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