David Naylor

David Naylor

Lives in Sweden Sweden
Works as a Web Editor
Has a website at http://davidnaylor.org/blog/
Joined on May 31, 2006

Comments

Total: 26, showing: 1 – 20
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On Sigma 18-35mm F1.8 DC HSM Review preview (320 comments in total)
In reply to:

David Naylor: Wow, this "AF issue" is being blown completely out of proportion. I've had this lens for over a month now and haven't had even the slightest indication that there is anything wrong with the AF. If there is any inconsistency I'd say it is well within the limits of what is normal for any lens using phase-detect focus.

And since the open-loop AF myth has been de-bunked (i.e. PDAF *does* confirm focus after shifting) then a large part (all?) of any inconsistency will be the fault of the AF sensor.

Thanks for the details. I'd really like to see this tested by Lensrentals.com too with a comparison vs a few other lenses. I just find it a little strange that this hasn't been noted anywhere else, and I believe I've read/watched pretty much every review out there.

Obviously, having bought this lens I know my view is probably biased, but I'm really trying to look at this issue objectively.

Btw, did you notice if the AF inconsistency was any different at 18 vs 35mm?

Direct link | Posted on Sep 3, 2013 at 09:30 UTC
On Sigma 18-35mm F1.8 DC HSM Review preview (320 comments in total)
In reply to:

David Naylor: Wow, this "AF issue" is being blown completely out of proportion. I've had this lens for over a month now and haven't had even the slightest indication that there is anything wrong with the AF. If there is any inconsistency I'd say it is well within the limits of what is normal for any lens using phase-detect focus.

And since the open-loop AF myth has been de-bunked (i.e. PDAF *does* confirm focus after shifting) then a large part (all?) of any inconsistency will be the fault of the AF sensor.

In fact, none of the previous reviews I have read have mentioned any AF issues.

Direct link | Posted on Sep 3, 2013 at 07:35 UTC
On Sigma 18-35mm F1.8 DC HSM Review preview (320 comments in total)

Wow, this "AF issue" is being blown completely out of proportion. I've had this lens for over a month now and haven't had even the slightest indication that there is anything wrong with the AF. If there is any inconsistency I'd say it is well within the limits of what is normal for any lens using phase-detect focus.

And since the open-loop AF myth has been de-bunked (i.e. PDAF *does* confirm focus after shifting) then a large part (all?) of any inconsistency will be the fault of the AF sensor.

Direct link | Posted on Sep 3, 2013 at 06:42 UTC as 65th comment | 7 replies
On Sigma 18-35mm F1.8 DC HSM Review preview (320 comments in total)

I own the Sigma 18-35mm f/1.8, the Canon 17-55mm f/2.8 IS, the Sigma 50-150mm f/2.8 IS, and two more lenses.

I don't find the Sigma's autofocus to be any more reliable or unreliable than any other lenses'.

This brings be on to a bigger question: Is it even technically possible for the lens to affect consistency in this regard? It is the camera's autofocus sensor that reports "sharp" or "not sharp", so how can this be the lens' fault?

I have always found this to be a problem with phase-detect AF, regardless of which lens I'm using. Is there really a lens out there which always delivers perfect focus using PDAF?

I have a personal theory that states that the wider a lens is, the harder it is for the PDAF sensor to tell the difference between in-focus and out of focus. This seems to be very much true for the two UWA lenses I have owned, as well as the wide end of my standard zooms.

Direct link | Posted on Sep 2, 2013 at 14:01 UTC as 98th comment | 5 replies
In reply to:

appelpix1: How many of you are now thinking like me: No full frame, staying with APS-C thanks to this lens!?

Is that a fact? How come then that this lens is a third the price of a Canon 24-70 f/2.8? Does the focal length range explain the price difference really?

Direct link | Posted on Jul 22, 2013 at 14:21 UTC
On Adobe launches Photoshop Lightroom 5 Public Beta news story (208 comments in total)

Wohoo! A real (kinda) clone tool!

Direct link | Posted on Apr 15, 2013 at 20:58 UTC as 59th comment
In reply to:

Cailean Gallimore: I was wondering what that drip, drip, dripping sound was, and I found out that it was the Canon/Nikon innovation timeline...

Go take pictures yourself. You're obviously lurking here just as much as everyone else.

Direct link | Posted on Mar 21, 2013 at 20:46 UTC
On Just posted: Hands-on preview of the Canon EOS 100D/SL1 news story (379 comments in total)
In reply to:

marike6: Making a DSLR smaller doesn't make it more usable. Chopping off the grip may appeal to m43 fans, who seem to believe that ALL cameras should be miniature because it's just too hard, too much effort to carry a normal sized camera, but it won't make the camera easier to shoot with, or balance better with telephoto lenses. It is much, much more tiring to shoot with a camera that has no grip. So I'm hoping this trend towards miniaturization ends soon.

As far as the sensor, it's strange that Nikon used the 16 mp Exmor in the D7000/D5100 for one release cycle and it was class leading for DR, color depth and ISO. Canon has this mediocre 18 mp sensor and they are using it over, and over, and over again. Go figure.

All that said, this camera actually looks pretty interesting, and at least it has a nice LCD and an OVF. If it had a slightly better sensor, it would be more compelling.

If it really was a new 18 MP sensor, Canon & DPreview would tell us so.

Direct link | Posted on Mar 21, 2013 at 20:19 UTC
In reply to:

David Naylor: Can't believe that Canon are pulling this on us. This is the 7th camera using the same old 18 MP sensor first seen in the 550D & 7D. That's like 4 years ago.

If Canon had updated the 18 MP sensor in any real way, they would have let us know.

Direct link | Posted on Mar 21, 2013 at 18:25 UTC
In reply to:

facedodge: Some websites are speculating that this is a NEW 18MP SENSOR.... no change in number of pixels, but a change in ISO performance. ISO range is now 100-12800 native - expandable to 25600. That is a one stop increase.

Maybe it's more noise reduction. We won't know until we get to test it.

If Canon actually *had* put a new 18 MP sensor in the 700D, they would not have let it slip by unnoticed.

Direct link | Posted on Mar 21, 2013 at 18:23 UTC
In reply to:

Clear as Crystal: Does no one else think this may be a minor upgrade just to get numbering system lined up for marketing? 700D, 70D, 7DII? Then the 600 gets removed leaving the 100 in its place (7000D being too like the Nikon D7000). From my point of view (an amateur) I always found it strange that the Nikon D7000 series had a numbering system which seems to suggest an earlier generation than the 3000 and 5000 series.

I know its not true but to a amateur who walks into a shop it could put them off buying the more expensive camera in favour of one which appears to be a newer generation if they lack the background knowledge to know better.

But they could just as well have released this 700D after the 70D and 7D II. Makes no sense to release it now, with almost no improvements.

Direct link | Posted on Mar 21, 2013 at 18:13 UTC
In reply to:

Ross the Fidller: I'm always glad to hear others whinge about Canon instead of bashing what I use.

What is it that the US models have to have their own (whacky) name for the models?

Yeah, I never understood Canon's weird naming policy. We live in a global world and shop camera accessories from across the planet. Just choose a name and stick with it.

Direct link | Posted on Mar 21, 2013 at 18:07 UTC
In reply to:

Earthlight: Is this really still the same old 18mp sensor? What is this, some weird alternate reality where sensor development does not exist?

The 18 MP sensor must have paid for itself aaages ago. The 7D, 550D and 600D surely sold in droves?

Direct link | Posted on Mar 21, 2013 at 08:53 UTC
On Canon EOS 700D Rebel T5i preview (154 comments in total)

Can't believe that Canon are pulling this on us. This is the 7th camera using the same old 18 MP sensor first seen in the 550D & 7D. That's like 4 years ago.

Direct link | Posted on Mar 21, 2013 at 07:20 UTC as 83rd comment | 2 replies

Can't believe that Canon are pulling this on us. This is the 7th camera using the same old 18 MP sensor first seen in the 550D & 7D. That's like 4 years ago.

Direct link | Posted on Mar 21, 2013 at 07:19 UTC as 79th comment | 5 replies

Yay, great news! Can't wait to see reviews of the new 30mm f/1.4.

Direct link | Posted on Mar 8, 2013 at 08:37 UTC as 30th comment
In reply to:

marike6: Nikon pulled out all the stops on this update. I'm sure some will still desire a D400, but it's hard to imagine a nicer DX camera specs wise.

Weather sealing, no OLPF, AF to f8 means my using TCs with my 70-200 f4 VR. Nice.

IQ should exceed the already superb D5200 and if video quality is as good as the that camera, it's going to be a monster all-around DX shooter.

Looks like my other body is getting a baby brother.

Lol, it is kinda funny how Nikon and Canon shooters use the other brand's latest cameras to demand new products from their own brand. Don't get me wrong, I love the competition.

Meanwhile, on the Canon forum, the D7100 is used to demand huge IQ improvements in the Canon 7D m2.

Direct link | Posted on Feb 21, 2013 at 13:28 UTC
In reply to:

Mssimo: Maximum shutter speed 1/8000 sec Good
(2, 3, 5 frames at 1/3 EV, 1/2 EV, 2/3 EV, 1 EV, 2 EV steps): 2EV stops! very good

Why the hell cant they do 2 EV stops in the D800?!?!?

In general, both Canon and Nikon have been very slow to create flexible bracketing. How can it be so hard?

Direct link | Posted on Feb 21, 2013 at 12:41 UTC
In reply to:

Edgar Matias: The 1.3x Crop Mode basically crops the sensor down to m4/3 size. Very cool.

Not sure I understand the point of that really. Make it 7 fps for real instead! =)

Direct link | Posted on Feb 21, 2013 at 12:39 UTC
On World Press Photo announces 2013 contest winners news story (298 comments in total)
In reply to:

Digitall: Too much PP for photojournalism pictures?

That's an interesting observation. Here in Sweden photojournalists tend to go further with their editing than what is common in the US and UK.

Direct link | Posted on Feb 15, 2013 at 22:47 UTC
Total: 26, showing: 1 – 20
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