D Cox

Lives in United Kingdom United Kingdom
Joined on Jan 17, 2011


Total: 18, showing: 1 – 18
In reply to:

Najinsky: Re: Stopped down AF.

Does this vary by body/lens combination. For example, on an A7R ii does it open up some lenses for AF but not others, like this one?

In your review of the A7R ii you noted this as a criticism only for AF-C

I would open up by two stops, not to fully wide open.
If you are shooting at f/11, the image at f/1.8 is so different from the final photo that the viewfinder becomes quite misleading.

Link | Posted on Apr 2, 2016 at 10:01 UTC
In reply to:

maridia: Two more interesting cameras from Sigma with great potential gimped AGAIN even before release due to Sigma's incomprehensible reliance on their SPP software and mostly incompatible proprietary raw file format. Ugh.

The best solution would be to export 16-bit TIF as well as JPG.

Not quite as recoverable as raw in case of overexposure, but still better than JPG.

Link | Posted on Feb 24, 2016 at 16:23 UTC
In reply to:

veritalens: Damned you SIGMA!!! I want to like this camera so much, but the selfish narrow-minded thought on the mount is killing this for me! WHY!?!?!?!?!??!

I won't buy one with a Canon, Nikon, Pentax, SA or any other SLR mount.

Any camera I buy has to be usable with all of these, and with other lenses (fully manual) that I have.

Still, they made the big steps forward of replacing the mirror with an EVF, putting some PDAF pixels on the sensor, and adding peaking. They are very near to offering a useful interchangeable-lens camera.

Link | Posted on Feb 24, 2016 at 16:20 UTC
In reply to:

Mike FL: Can DPR ask Sigma why the sensor is very poor in higher ISO?

"a one trick pony."

Yes, but the trick is producing superb still images in good light. That is quite useful.

They don't do video.

Link | Posted on Feb 24, 2016 at 16:12 UTC
In reply to:

GodSpeaks: Very interesting cameras, but why oh why did they use a DSLR flange distance? Had they used a shorter flange, AND produced Sigma, Canon, Nikon and Sony mount adapters, they would have sold a lot more cameras. Doubly so, if the mount adapters were AF capable.

Who wants to buy Sigma mount lenses, other than current Sigma owners?

"The majority I would say don't want to use adaptors"

The Adapted Lens forum here is pretty popular.

For me, the whole point of a mirrorless camera is being able to use a wide variety of lenses.

Link | Posted on Feb 24, 2016 at 16:05 UTC
In reply to:

Everlast66: Looks like for the design of the back panel they hired a washing machine designer ;p

Why is the finder in such an awkward position, and why make the grip shorter, when the main advantage of large bodies is a large grip.
They also made this gigantic body and didn't even put a flippable screen?

What you call a "macro ring" is the SA to E mount adapter that Sigma announced yesterday.

Link | Posted on Feb 24, 2016 at 16:02 UTC
On article Sony A3000 First Impressions Review (680 comments in total)
In reply to:

PORTRAIT: But,wait a sec., so the A3000 Sony is an "E" Mount system cam,same Nex series lenses right? Now what about "A" Mount ?? Can this cam carry the "A" mount?? or not? Or will Sony make another cam specific for "A" mount"..? I'm puzzled..

The camera shown above is marked Alpha 3000, not A3000.

One is a Greek letter, the other is a Latin letter.

Link | Posted on Aug 27, 2013 at 13:59 UTC
On article Sony A3000 First Impressions Review (680 comments in total)
In reply to:


Until now, Alpha stood for interchangeable lenses on the Alpha mount.

This is an Alpha branded camera with a NEX mount. Daft.

There is no upgrade path between this cam and the existing Alpha cams; if you buy this cam and decide to upgrade later to a bigger Alpha cam, you will then have to re-buy all your lenses.

If the idea was to produce a better handling camera for NEX, then they could easily have done that without changing the name to Alpha.

I don't even get the Alpha connection. What is it; just because it looks like an SLR?


But that aside, it seems like a very good entry level camera at a stupidly good price; Christmas shopping in camera stores is gonna be interesting.

The mount is the A mount, not the Alpha mount. A for Autofocus, I believe.

All NEX cameras are Alpha cameras - they come from Sony's Alpha division.

Link | Posted on Aug 27, 2013 at 13:55 UTC
On article Interview - Phil Molyneux, President Sony Electronics (132 comments in total)
In reply to:

tesilab: I hope Mr Molyneux will read these comments. There is NO contradiction between touch screen operation and the EVF. Touch-shutter is a critical tool for a certain style of photography. It simultaneously establishes both when to shoot and where to focus. It is also criticalyl for discreet street photography.

But many of us require an EVF for all those occasions where the LCD simply won't work, when we either need a steadier hold on the camera, or the LCD is unreadable in bright sun.

I agree. It is absurd to think that a user buys an expensive camera for only one type of photography. Many people will want to use the EVF in some situations (for instance sports) and the touch screen in others (such as macro).

Link | Posted on Oct 15, 2012 at 19:53 UTC
On article Just deployed: New dpreview.com forums system (699 comments in total)

The popup panels are quite annoying, and the popup EXIF data destroys the composition of any image you are looking at.

The larger size type is easier to read than the old. Blue on black is the worst possible colour combination for type, because of the low blue resolution of the eye.

Generally, it is all too jumpy and distracting, like a fairground.

I suggest you cut out all the features you are most proud of.

Link | Posted on Oct 4, 2012 at 07:47 UTC as 247th comment
On article Coming soon: Lens Reviews to return to dpreview.com (272 comments in total)

Will you be testing just one copy of each design, or a representative sample?

One of the biggest problems for a buyer is to know which lenses are consistently good and which vary from excellent to bad.

Link | Posted on Oct 2, 2012 at 16:35 UTC as 117th comment | 1 reply
On article Just Posted: Sony Cyber-shot DSC-RX100 review (373 comments in total)
In reply to:

Jens_G: I wish Sony would make one with a fixed, 35mm (even 40mm) equivalent fov lens, with even larger physical aperture. Imagine the IQ!

That would be practically the Sigma DP2M.

Link | Posted on Aug 29, 2012 at 13:13 UTC
On article Compositional Rules (120 comments in total)
In reply to:

ashwins: Very clear and informative article.

I agree. A good clear summary, especially for beginners.

Link | Posted on Aug 22, 2012 at 08:53 UTC
On article Compositional Rules (120 comments in total)
In reply to:

Camediadude: Thank you for the well illustrated article. I definitely appreciate the concepts of various "compositional aids" and arrangements, but it's just the act of calling them "rules" that has always irked me some! I mean not to minimise the effectiveness of it all, for I recognise that these "guidelines" (a name which I prefer!) have long been used to devastating effects by the giants of photography, for decades and by painter legends for centuries before that. Perhaps it is just semantics.. (Rules, at least those which do Not pertain to the keeping of some from harming others, often tend to rub me the wrong way! But that is personality-based mainly, from what I can tell.)

The photographic equivalent of the rules of grammar is not composition, but focussing, exposure and white balance.

If you want a literary equivalent of composition, it would be the pacing and contrast of scenes in a story. For example, the famous scene of the porter in Macbeth, where the comedy acts as a contrast to the prevailing darkness.

The "Rules of Composition" are starting points, not constraints like the rules of a sport.

Link | Posted on Aug 22, 2012 at 08:45 UTC
In reply to:

Elaka Farmor: Is the resoultion 46MP or 14.6MP?
Must be 14.6 because the final size is 4,800×3,200....hmmm.

It is 14.6MP, but a Bayer sensor that claims 15MP is really at best 5MP.

So if you are going to multiply one by three, you should multiply the other.

Link | Posted on Jun 29, 2012 at 16:08 UTC
In reply to:

VadymA: There are better alternatives than this camera for 99.999% of photographers.

From which it follows that there are many thousands of photographers for whom this is the best alternative.

Link | Posted on Jun 29, 2012 at 16:05 UTC
In reply to:

slncezgsi: Interesting to be honest. The optical quality of the previous DP models was very good and now with a new sensor it sounds interesting. I do not see a provision for clip-on EVF what is becoming a standard on this type of cameras. IS would have been nice. Also - nothing for movie makers :)

But what interests me personally most is performance at low ISO - colors and dynamic range. Detail should be very good - curios how it will compare to GXR M-module which has no AA.

Let's see about the price ...

Built in flash is really only useful as a fill light in bright sunlight. With a standard hot shoe, these new DP cameras should work fine with studio flash setups or with a hammerhead flash on a bracket.

Link | Posted on Feb 8, 2012 at 14:45 UTC
In reply to:

Keith Lommel: It's obvious they're using the 19/2.8 and 30/2.8 which they're also marketing for m43 and NEX.

Looking at the dimensions, it doesn't seem the lenses are very deeply integrated into the body... Seems they could have engineered some kind of lens mount so you could swap one for the other without increasing size that much. That might have made for a much more exciting product, rather than forcing foveon fans to pick one and only one focal length, or buy two (likely very expensive) cameras.

Or better yet, put a NEX mount on there. I'm sure a lot more people would try such a camera if they could add it to an existing system and feel like their lenses could be reused on future bodies...

I would buy a DP camera with a NEX mount in a flash.

Link | Posted on Feb 8, 2012 at 14:36 UTC
Total: 18, showing: 1 – 18