Alphoid

Alphoid

Joined on Jun 24, 2011

Comments

Total: 95, showing: 1 – 20
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Now if there were only laptops with sensible resolution screens. It's funny to see cell phones get this far ahead of Microsoft. That's a (former) 20-year old monopoly for you.

Direct link | Posted on Aug 6, 2014 at 01:42 UTC as 13th comment | 2 replies
On Canon EF-S 10-18mm F4.5-5.6 sample gallery article (99 comments in total)
In reply to:

Polytropia: It does not give "a 16-29mm equivalent range". That makes no sense. 16-29mm equivalent to what? Depth of field is not the same as a 16-29mm lens. A 16mm lens would have a different angle. How is that equivalent?

Stop lying to people, DPReview. And stop promoting 135F-format every freaking chance you get. Only a small minority even cares anymore about 135F-format. It's not helpful to continually relate focal lengths to a format that only represents a tiny percent of the market.

It's 2014 not 2004. Please get with the times and start using degrees to describe angles, instead of relating everything to a format few people use anymore.

I will bet anyone here $10,000 USD that less than 5% of photographers have ever looked through a 16mm lens on a 135F camera, let alone owned one or taken a picture with one. So how is it useful to make the analogy of this lens to that particular focal length and not even state that's what you're doing?

@Richard Although I bought a FF camera a few weeks ago, I'm actually with Polytropia here. I have an intuitive feeling for what "18mm FF equivalent means" simply because I've been shooting for half my life. Even I get confused at the ultrawide (8mm vs 4mm? I'm clueless). My wife? My mom? My kid? My coworkers? None of them will have any idea. It's a broken nomenclature. The instant you start talking about 45 degrees or 90 degrees or 5 degrees, more people will understand. That's only a good thing.

Us geeks? We'll figure it out too, with time.

On a sidenote, thumbs up for finally adopting equivalent aperture. That also simplifies things.

Direct link | Posted on Jul 30, 2014 at 01:35 UTC
In reply to:

Michael Ma: Instead of shrinking the sensor size to a fraction of what it is now, why not just put a 4x4 array of existing 1/3.2" sensors? Wouldn't that be cheaper than building your own sensor from scratch?

@Rishi you're very confused here. It's the combined surface are of the sensors that determines shot noise performance. Period. That accounts for all light loss due to inter-sensor spacing, etc.

The only things it does not account for are aperture, and any losses in the lens (difference between f/stop and t/stop).

Direct link | Posted on Jul 29, 2014 at 11:23 UTC

If it's waterproof, Android-based, has a large sensor and fast lens, and full manual controls, I'll buy it, effectively no matter the price. If Sony marks at $2k, I'll drop it in a second.

Direct link | Posted on Jul 23, 2014 at 23:14 UTC as 5th comment
In reply to:

Beat Traveller: Meh. I've tried to use MIT's MOOC stuff before, from the neuroscience courses, and I found it to be massively over-hyped. It's basically just the slides, lecture notes and references from each course: material that costs them nothing extra to produce because they put it up for the students anyway.

Without more detailed explanations it's useless as a learning tool. You might as well borrow a textbook from a public library.

You're confusing MIT MOOC stuff with MIT OCW. The MOOC stuff is pretty good. Of course, the photography stuff is not the MOOC stuff (yet).

Direct link | Posted on Jul 19, 2014 at 20:47 UTC
On Tamron SP 150-600mm F/5-6.3 Di VC USD Lab Test Review preview (218 comments in total)
In reply to:

Ramjager: So where is the test of the AF performance like tracking etc.
There is more to a lens test than lines per millimetre.
Take a browse around the forums to see the more important part of the review DXO completely omit.
Its not pretty.
When oh when will DXO start testing properly and include AF performance which is far more important than an extra 5lines per mm of sharpness.
Try tracking a bird with this lens..good luck.

DxO is not a camera review site. They make software for correcting issues with lenses and camera sensors. They collect data to help allow that. They generously share some of the data with the public.

If you'd like to see a culprit, it's dpreview.

Direct link | Posted on Jun 26, 2014 at 09:33 UTC
In reply to:

m_o_b_y: What is the reason to discuss about completly exaggerated and useless ISO ?
To stupefy the poor client ?
:-)

Because it depends on the application. Not everyone is a studio photographer.

Direct link | Posted on Jun 22, 2014 at 12:48 UTC
On Sony Cyber-shot DSC-RX100 III First Impressions Review preview (2978 comments in total)
In reply to:

aerorail: shoot some hard scenes like snow capped mountains on a clear blue sky day with dark foreground rock/trees

I'm wondering how it would do for photojournalism. Would you mind some shots in the Niger Delta region?

Direct link | Posted on Jun 11, 2014 at 00:18 UTC
On Sony Cyber-shot DSC-RX100 III First Impressions Review preview (2978 comments in total)

I'd like to see how video compares with limited light. Full frame readout should help there substantially.

Direct link | Posted on Jun 2, 2014 at 14:10 UTC as 215th comment
In reply to:

Tord S Eriksson: Encouraging others to steal copyrighted pictures is still a criminal offence, I bet, not only in the US.

And why would this seem to be applauded by Facebook is not that surprising, as that company tell you explicitly that Facebook have the right to freely access your uploaded photos, to do what they want with them! And they always strip the EXIF from your photos for that reason only, I bet!

If anyone here believed the water-stamp on your pictures was fraud-proof, then you have a very naive conception of the world around you!

I do not believe you. To the best of my knowledge, contributory liability is a common law concept which requires a much more substantial enabler (for example, the original Napster passed the test, but even then, barely). Please cite the law.

Direct link | Posted on May 29, 2014 at 11:18 UTC
On Sony Cyber-shot DSC-RX100 III First Impressions Review preview (2978 comments in total)
In reply to:

Alphoid: This may seem like a highly unusual request, but please do compare digital zoom in the review. The RX100 is a bit short on the telephoto end. It has a 1" sensor, high megapixels, and a fast lens. A 2x digital zoom would still place it at, hypothetically, identical performance to a 5 megapixel image 1/2.3" camera with f/2.8 lens at 140mm equivalent, or a 1/1.7" 7MP sensor camera with an f/2.8 120mm-equivalent lens.

That's plenty for portraits in most settings if it works well.

"If it works well" is the key question. How does the autofocus system hold up? Do issues with lens sharpness kick in? Is it usable in that mode? Etc.

@PicOne Digital zoom isn't the same as a crop. In terms of RAW image to JPEG, it is, but before then, the camera has an autofocus system, an EVF, etc. Digital zoom is supposed to behave the same as normal zoom -- without, for example, reduced resolution or refresh in the EVF. If you're in automatic mode, it shouldn't pick a focus target outside of the zoomed-in area. Because you're cropping, it's a bit more sensitive to focus errors. Etc. I don't care about 'Clear Image' upscaling, but I do care about how all those other things work. At least on paper, a crop from an f/2.8 lens should outperform an f/4.9 lens, so the RX100III may just be better than the I/II. But if the ergonomics or AF or similar are broken, it might not be.

Direct link | Posted on May 17, 2014 at 11:57 UTC
On Sony Cyber-shot DSC-RX100 III First Impressions Review preview (2978 comments in total)

This may seem like a highly unusual request, but please do compare digital zoom in the review. The RX100 is a bit short on the telephoto end. It has a 1" sensor, high megapixels, and a fast lens. A 2x digital zoom would still place it at, hypothetically, identical performance to a 5 megapixel image 1/2.3" camera with f/2.8 lens at 140mm equivalent, or a 1/1.7" 7MP sensor camera with an f/2.8 120mm-equivalent lens.

That's plenty for portraits in most settings if it works well.

"If it works well" is the key question. How does the autofocus system hold up? Do issues with lens sharpness kick in? Is it usable in that mode? Etc.

Direct link | Posted on May 16, 2014 at 22:55 UTC as 564th comment | 6 replies
On Sony Cyber-shot DSC-RX100 III First Impressions Review preview (2978 comments in total)
In reply to:

Alphoid: Seems like another home run. Sadly, not quite worth the upgrade for me. There's a half dozen possible ifs that would push it over, but most likely, I'll go for the IV. If Sony can keep up this momentum, it'll be hard to resist whatever that upgrade will bring.

If it was a few hundred less, I'd do it.
If it had a mike input and audio levels, it'd replace carrying video equipment. I'd do it. (I'm especially excited by this with the full frame readout)

The EVF certainly does justify the price hike, as does the faster glass. If I were buying new, I'd get the MKIII for that alone, not to mention wifi, full frame video readout, etc. There's nothing else in the class. It's definitely worth the $350 more than the RX100 to me. It's just not worth the $800 more for someone who already owns an RX100.

Direct link | Posted on May 16, 2014 at 19:20 UTC
On Sony Cyber-shot DSC-RX100 III First Impressions Review preview (2978 comments in total)

Seems like another home run. Sadly, not quite worth the upgrade for me. There's a half dozen possible ifs that would push it over, but most likely, I'll go for the IV. If Sony can keep up this momentum, it'll be hard to resist whatever that upgrade will bring.

If it was a few hundred less, I'd do it.
If it had a mike input and audio levels, it'd replace carrying video equipment. I'd do it. (I'm especially excited by this with the full frame readout)

Direct link | Posted on May 16, 2014 at 11:19 UTC as 659th comment | 5 replies

I'd be interested to know what they did to merit the price... The Canon and Nikon branded 70-200 f/4 sell for less.

Direct link | Posted on May 16, 2014 at 11:03 UTC as 46th comment | 1 reply
On Canon PowerShot G1 X Mark II Review preview (657 comments in total)
In reply to:

BRPWS: After all the bad things you guys wrote about this camera how does it get a silver award? Your review and your award contradict each other.

@Barney Britton If you were truly editorially independent, you'd comment about the battery door issue.

Direct link | Posted on May 8, 2014 at 10:12 UTC
In reply to:

Marvol: Maybe Sony can fix the unfortunate omission of GPS via a firmware upgrade*...

[*yes yes I know... Sony doesn't do firmware upgrades ;P]

I hope they do. It has NFC+wifi. A cell phone has GPS. Adding GPS via firmware update and cell phone app would be great.

It's a great camera, but not worth the upgrade from the A77. Loss of GPS is a big part of that.

Direct link | Posted on May 1, 2014 at 13:00 UTC

Ya know, I would pay good money for a high quality, autofocus mirror lens. Like the Minolta and early Sony. Compact. Sharp. No CA. Only downsides are fixed aperture and donut bokeh. The cheap ones on the market today are worthless.

Direct link | Posted on Apr 28, 2014 at 21:33 UTC as 5th comment

Wow! For just $600, I'll be able to get ugly photos all the way from 16mm up to 300mm for months, maybe even years, until the lens breaks!

Thanks, Tamron!

Direct link | Posted on Apr 12, 2014 at 01:24 UTC as 12th comment | 7 replies

I'm increasingly feeling the love for MFT...

Direct link | Posted on Apr 8, 2014 at 02:00 UTC as 19th comment | 1 reply
Total: 95, showing: 1 – 20
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