ProfHankD

ProfHankD

Lives in United States Lexington, United States
Works as a Professor
Has a website at http://aggregate.org/hankd/
Joined on Mar 27, 2008
About me:

Plan: to change the way people think about and use cameras by taking advantage of cameras as computing systems; engineering camera systems to provide new abilities and improved quality.

Comments

Total: 441, showing: 1 – 20
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On Photokina 2014: Sony stand report article (60 comments in total)

Actually, photo 4 makes a lot of sense to me -- the QX1 seems like a great choice of remote-camera-back to stick behind a lens... and a remote pan/tilt mount often would be the right thing to sit it on. I can also see it as a microscope or telescope camera. Or on a UAV. The thing that doesn't make sense to me is sticking it on your cell phone (or your cell phone on it). ;-)

Hopefully, next year's QX model will use a FF sensor. :-)

PS: People who've been complaining about lack of Sony lenses should be happy with Sony this year, although I've long been happy merely having the largest choice of lenses of any camera despite very few being Sony branded.

Direct link | Posted on Sep 18, 2014 at 00:03 UTC as 4th comment
On Canon EOS 7D Mark II First Impressions Review preview (1554 comments in total)
In reply to:

Charrick: I don't want to be "that guy", but I guess I will be. I'm not terribly impressed. The autofocus system is a huge step up (from its predecessor, though not the 70D). Its sensor has the same number of pixels as the 70D, but I hope that it's a very different one and not just a slightly upgraded version. However, my gut feeling is that the Sony A77 II's performance will be better on DXOMark (even with its "translucent mirror"). Canon sensors lag behind (often more than a generation) what other cameras have in terms of color depth, dynamic range, and even high ISO ability. As usual, the "higher-level" camera lacks a flipping screen (because "pros" don't want that...or so Canon tells themselves). For some odd reason, some of you would-be pros say you don't want touchscreens or pop-up flashes (even though both are just extras and you don't have to use them!), and Canon has listened on the touchscreen front. Also, 1080p is aging and 4K would be impressive. The 7DmkII is OK but nothing special.

This is such an impressive camera five years ago! Oh wait. It's now. Maybe somebody should tell Canon...?

I guess I'm "that guy" too. Canon just keeps looking older every year. I buy lots of Canons for my research, but I wouldn't buy any of their cameras if it wasn't for the ability to program them using CHDK and ML -- which are externally-developed environments that Canon does not support. On the bright side, at least the lack of new stuff inside most new models makes it easy to port CHDK and ML to them. ;-)

Direct link | Posted on Sep 16, 2014 at 00:33 UTC
In reply to:

riskinhos: for that price just get full frame.

I don't think you appreciate just how tough it is to do BSI on a sensor this large... I'd bet it costs more to make than a FF non-BSI sensor. Uncompressed 4K and 15FPS full res too. In sum, pretty darn impressive, Samsung.

Direct link | Posted on Sep 15, 2014 at 11:33 UTC
On Sigma announces dp1 Quattro article (199 comments in total)
In reply to:

Tungsten Nordstein: The loupe is interesting. Let's hope it both annoys and alienates the traditionalists – especially the ones who crack lame 'lol' type jokes.

I've been using a similar device for years on the back of my NEX-5 -- a rigid-frame magnifying finder that cost under $20 via eBay (and unfortunately didn't have a diopter adjustment). It doesn't compete well with the NEX-7 or A7 EVF, and it's big enough to attract attention (which could be good or bad), but there is no question that it does work quite well. Given the odd form of the Quattro, I think the LCD eyepiece actually makes more sense than an add-on EVF.

Direct link | Posted on Sep 14, 2014 at 00:42 UTC

I don't see much technical detail here. Fuji has a very long history of making lenses with add-on apodization of various kinds, from sink-strainer-like things to circular gradient filters that remove central hot spots in wide-angle large-format lenses. The DPReview descpription "filter is a radial gradient filter designed to exactly compensate for any bright regions in the circles of confusion the lens projects" sounds like a hot spot filter -- the Minolta STF does exactly the opposite. To improve bokeh, you want a filter that isn't compensating for anything but gets darker toward the edges like the STF one does.

Any significant gradient will confuse PDAF sensors,but should not impact CDAF too severely. It sound like Fuji is just taking what they can easily get from using a lens design that already had hardware to move the focus -- precisely what one would expect.

One last note: it is exceedingly difficult to make high-quality circular gradient filters. +$500 sounds reasonable.

Direct link | Posted on Sep 11, 2014 at 00:46 UTC as 6th comment
On Zeiss introduces 'no distortion' Otus 1.4/85mm article (336 comments in total)
In reply to:

ProfHankD: Zeiss specs look excellent, although it's around 0.8% distortion so saying how minimal distortion is makes little sense. All the optical qualities look very good, and the CA issues are much more important -- APOs do things postprocessing can't fix for other lenses. I'll also admit that my Samyang's "close focus" behavior drives me nuts, and extensions tubes cause a huge degradation in IQ for that IF lens design. Then again, for 1/18 the price....

You haven't removed all distortion if there is fairly significant geometrical distortion. The stuff they have fixed is largely just compliance with the definition of APO.

Direct link | Posted on Sep 9, 2014 at 11:35 UTC
On Zeiss introduces 'no distortion' Otus 1.4/85mm article (336 comments in total)

Zeiss specs look excellent, although it's around 0.8% distortion so saying how minimal distortion is makes little sense. All the optical qualities look very good, and the CA issues are much more important -- APOs do things postprocessing can't fix for other lenses. I'll also admit that my Samyang's "close focus" behavior drives me nuts, and extensions tubes cause a huge degradation in IQ for that IF lens design. Then again, for 1/18 the price....

Direct link | Posted on Sep 9, 2014 at 10:38 UTC as 59th comment | 3 replies
On Beginner's guide: shooting high-key at home article (68 comments in total)
In reply to:

Photomonkey: Pretty risky showing us how to get around Amazon's patent.

So you did! I missed that (traveling); sorry.

Direct link | Posted on Sep 9, 2014 at 01:35 UTC
On Beginner's guide: shooting high-key at home article (68 comments in total)
In reply to:

Photomonkey: Pretty risky showing us how to get around Amazon's patent.

The Amazon patent is a very interesting bit of surreal reality, but figuring-out how to word things to ensure a patent will be awarded is what patent lawyers do. It isn't really relevant to this article. That said, it's a pity that DPReview didn't post an article on that photography-related Amazon patent controversy when it happened....

Direct link | Posted on Sep 8, 2014 at 17:25 UTC

It's nice to see Epson still has long-term plans in inkjet printing. The market has gotten very tough, and even companies like Lexmark have left the field. At the same time, inkjet tech is one of the most promising paths to printing active circuit components, etc., and I'm sure the ink flexibility and variable dot size of their new heads is intended to deal with a lot more than ordinary color ink....

Direct link | Posted on Sep 7, 2014 at 03:55 UTC as 14th comment

Nice little history. I'm a little... SHOCKED that the product they point to after 1995 is the 2012 EOS C300! Is that really the primary future direction of the company?

Direct link | Posted on Sep 2, 2014 at 19:31 UTC as 21st comment
On Rain shot in the I'm shooting in the rain challenge (1 comment in total)

This appears to be a duplicate entry. Beyond that, neither one seems compliant with the rules: "shots taken in heavy rain or spray that caused VISIBLE DROPLETS on your lens."

Direct link | Posted on Aug 30, 2014 at 12:24 UTC as 1st comment
On Kodak 760H in the Carousel challenge (3 comments in total)

Voting again reveals that clever isn't appreciated by most DPReviewers....

Direct link | Posted on Aug 30, 2014 at 12:08 UTC as 1st comment
On I'm shooting in the rain challenge (2 comments in total)

Many of the entries here do not show obvious signs of "VISIBLE DROPLETS on your lens," which is what this challenge is supposed to be about. Admittedly, there may be a fine line between droplets visible in the photo and droplets on your lens. Thus, I will not disqualify entries that appear to have been made in good faith.

Voting should strongly favor entries that clearly have droplets visibly present in the optical path, degrading the optical quality by blurring, obstructing, or distorting portions of the image. Just having droplets in a scene captured with an optically unimpaired lens isn't what this challenge is about.

Direct link | Posted on Aug 29, 2014 at 19:18 UTC as 2nd comment
In reply to:

Juraj Lacko: It would be so much more appealing to me if it was made in m42 mount since that is easy to adapt with cheap adapter almost to any system.

What auto exposure feature? It's an unchipped manual lens, right? You enable the poorly-named "shoot without lens" option on your body, and maybe use a chipped adapter (e.g., to enable IBIS in Sony A-mount bodies), and it works fine... pretty much no matter what mount it natively was. Sony E/FE bodies even allow the fancy multi-shot modes to work with fully manual unchipped lenses. The only problem: no EXIF data.

Direct link | Posted on Aug 27, 2014 at 15:20 UTC
In reply to:

Juraj Lacko: It would be so much more appealing to me if it was made in m42 mount since that is easy to adapt with cheap adapter almost to any system.

I'm a Sony E/FE mount user too (with a fleet of commercial adapters + ones I've designed and 3D printed myself), but I still have A-mount bodies and sometimes use a wide range of different cameras in my research. As such, I usually get this kind of thing in A mount, but it would be much more useful in M42 or T.... After all, the fact that there's a Nikon version says the glass has a large enough distance to the sensor.

Direct link | Posted on Aug 27, 2014 at 13:30 UTC
In reply to:

Juraj Lacko: It would be so much more appealing to me if it was made in m42 mount since that is easy to adapt with cheap adapter almost to any system.

Yes! I don't know why manufacturers keep insisting on making fully manual lenses in fixed mounts. M42 would work for everything but Nikon; a T thread would be even better because it would work on everything and T adapters allow rotational adjustment. There isn't some stupid old patent preventing Ts, is there?

Direct link | Posted on Aug 27, 2014 at 10:34 UTC
On Fujifilm X30 First Impressions Review preview (365 comments in total)

Hmm. 4 articles to announce one X30 camera. That's a DPReview record. Is the Fuji mark-up at GearShop that high? ;-)

Direct link | Posted on Aug 26, 2014 at 16:40 UTC as 63rd comment | 6 replies
On Fujifilm X30 First Impressions Review preview (365 comments in total)
In reply to:

veroman: I have yet to find any reason to go beyond my X10. The X10 gives me exceptional IQ in a wide range of environments and conditions and provides the best JPEGs of any camera I've owned so far, including my bigger Olympus E-bodies.

The X30 is almost certainly for newcomers and not X10/X20 owners like myself.

As the latest model in the series, I guess it fills the bill. But I don't see it as a worthwhile improvement over the older versions. I'm not even sure a 1" sensor would have made all that much difference. The X10 really does produce some remarkable imagery.

The X10 is a very appealing package, but, having studied it a lot (I'm the author of DeOrbIt), IQ never was a great reason to buy an X10 over competing cameras. The innovative sensor design and processing were both alpha-test quality rather than tuned products.

Hopefully, the X30 will deliver somewhat better IQ without alienating fans of the X10 look and feel. I have doubts about how many new buyers Fuji will pick up with the X30, but the EVF should draw some....

Direct link | Posted on Aug 26, 2014 at 14:16 UTC
On Hasselblad unveils pixel-shifting 200MP H5D-200c MS article (248 comments in total)
In reply to:

marcio_napoli: For those saying the price is absurd:

I'm a really, really small fish as a fashion photographer, I can't charge not even a fraction of what this camera cost.

But I've once heard that a big name, national level fashion photographer, charged 60 K for a fashion catalog.

There's another big name I can think of, that shoot bedding and product photography.

His average price is around 30, 40 k per job! I've once heard he charged 95 grand for a larger job.

See? That's where these cameras are finding homes.

For big name photographers, who have their huge reputation tested job after job, nothing makes more sense than a Hasselblad and Phase One.

3 k DSLRs like the D800 only complement their kit for specific needs (higher ISO, more flexibility, need for weather sealing on a beach shooting), and are not their main camera.

Phase and Hassel are their average DSLR.

I know of quite a few research, museum archive, and industrial projects where $50K for a camera would be a non-issue. In fact, it would be expected and easily within budget. PS: don't ask what some people are willing to spend on lenses.

Direct link | Posted on Aug 24, 2014 at 18:45 UTC
Total: 441, showing: 1 – 20
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