William Koehler

William Koehler

Lives in United States Alpharetta USA, United States
Works as a Software
Joined on Dec 12, 2005
About me:

Panasonic DMC-GH4
Panasonic 12-35mm F2.8 lens
Pentax *ist-DL
Pentax K-x
Pentax K-01
Sigma 17-50mm f2.8 lens for K-mount
Pentax FA 35mm f.20
Pentax DA 18-55mm f3.5-5.6
Pentax DA 55-30mm f4-5.6
Pentax ZX-5n (35mm film)
Pentax K1000 (35mm film)
Sony DCR-TRV320
Sony HDR-HC9
Canon HF-S200
Canon HF-G20
Adobe Photoshop CS5.5
Adobe Lightroom 6.0
Sony Vegas Pro 13


Total: 118, showing: 21 – 40
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In reply to:

Harry Shepherd: I've spent several hours trying to purchase an upgrade,all to no avail every link I try takes me to a brick wall. I guess I'm a little luckier than Rbrt at least I It's not cost me any money

I am assuming from Lightroom 5 to Lightroom 6. So far Lightroom 6 appears to be available ONLY as part of CreativeCloud. Unlike Lightroom 5, 6 appears to have no standalone version on Adobes website.

Direct link | Posted on Apr 23, 2015 at 18:22 UTC

As a Panasonic GH4 owner I am less interested in higher pixel count and more interested in improved low light sensitivity and dynamic range combined with lower noise.

Direct link | Posted on Apr 19, 2015 at 20:42 UTC as 7th comment | 1 reply
In reply to:

Aur: "The other thing is heat. Because the sensor is always on, it generates heat. So with current technology we believe the time is not right for us to make a large sensor mirrorless camera. "

I wonder what this means for the longevity of a full frame mirrorless. They hint they ran into heat problems obviously, I know a Sony mirrorless can actually physically shut down in a hot climate when you've been shooting for a long time, especially with video, and Nikon has some patents to try to cool down the sensor. The camera will simply shut down to try to protect the sensor from the heat.

It isn't so much the longevity of the sensor that is at issue but the fact that image sensor noise increases with temperature. The temperature at which the image sensor can return a high quality result is a lot less than the temperature that will cause damage.

Direct link | Posted on Mar 9, 2015 at 16:42 UTC
In reply to:

wildkat2: Good interview from a tough subject. And good on you for asking pointy questions about the AF speed. Pentax needs to hear that we expect more. Pentax is not quite as secretive as Apple used to be but they come from the same school of thought.

I disagree with you about the "bulkiness" of the K-01. Paired with the DA40XS it is a joy for traveling and only slightly bigger than your typical super zoom. I think its unfortunate that most people looked at the yellow version, said ugh and decided it was "bulky." I wish Pentax would make a "K-02" that fixes things like lack of WR, slow processor, etc. Now about that 15-450…….

I also have a K-01. A substantially reduced flange-back distance would not actually reduce the size of the camera that much. The need for a decently sized grip and battery is in fact the limiting factor. When I put my Pentax K-01 and Panasonic GH4 next to each other, it is the GH4 that is the larger.


Direct link | Posted on Mar 9, 2015 at 00:01 UTC
In reply to:

Leandros S: I feel the landing page summary glosses over the fact that for Vaio, being spun out looks like the beginning of the end as product support and sales were abandoned for all markets except Japan.

I would be sure that Sony, like IBM before them, is finding the margins of the PC business to thin to be worth their time.

Direct link | Posted on Feb 21, 2015 at 02:30 UTC
On DPReview Readers' best shots of 2014 article (58 comments in total)
In reply to:

noiseky: I mean, what particular camera was used for each winning entry? Hope the photographers can also share the settings. Secret perhaps in producing these kinds of captures?

Download picture, open, look at picture properties, all is revealed.

Direct link | Posted on Feb 5, 2015 at 22:40 UTC
In reply to:

AbrasiveReducer: I love Ricoh's better stuff and certainly nothing wrong with Takumar lenses. But what is the compelling reason people would pay these prices, plus buy a new body to go with their new lenses, and sell their Nikon/Canon/Sony at a loss? Unless its someone who can afford FF but won't buy one unless it's a Pentax, I guess.

Someone who has already invested in the Pentax system and is upgrading from a crop sensor body to FF. The FF camera is backward compatible with the DA lenses AND handles FF lenses properly as well. So they are not selling their Nikon/Canon/Sony cameras or lenses period, much less at a loss.

Direct link | Posted on Feb 5, 2015 at 22:03 UTC
In reply to:

mediasorcerer: that nx1 is HUGE for a mirrorless, when samsung gets the quality of ther lenses up to fuji/ oly/sony zeiss standards then it may help there sales, but the nx1 was a poorly thought out mirrorless camera as its way too big/ its a dinosaur and way too expensive, the lenses are huge too, defeats the purpose of milc.

no firmware can change these facts/nor marketing spin, thats why its a flop of a camera.

for the money, your way better off with ff canikony or equiv.

Yeah, you'll appreciate that small mirrorless camera size which provides a poor grip whenever you hang some heavy glass on the front of the camera....NOT.

The point of a mirrorless camera may be small camera size. It may be that it makes it easier to make a camera that does either still images or video equally well. And the two do not have to always happen at the same time.

Direct link | Posted on Jan 16, 2015 at 04:00 UTC
In reply to:

LukeDuciel: I am looking (eagerly) forward to A7s mark II.

I would expect 12 - 18 months between release of the original A7S and the Mark II. That's just the way product development and release typically go. But we can hope.

Direct link | Posted on Jan 13, 2015 at 20:40 UTC
In reply to:

select: when they will make a 50mm and 35mm f1.8 at the same price point of Nikon and Canon? (so it means around $250)
this system won't be successful if they don't make some good quality but cheap lens

Fast, good, and cheap - pick any two. And it applies in almost any business.

Direct link | Posted on Jan 13, 2015 at 20:38 UTC
In reply to:

nicolaiecostel: Everyone's announcing cameras and Ricoh is announcing announcements. What have they been smoking?

The Pentax 645Z is a great camera by all accounts, and very inexpensive by the standards of the other machines in Medium Format, but even so the volumes it will sell in are microscopic. It is a niche of a niche.

Direct link | Posted on Jan 7, 2015 at 16:50 UTC
In reply to:

nicolaiecostel: Everyone's announcing cameras and Ricoh is announcing announcements. What have they been smoking?

You nailed it. CES comes with Pentax having no new product to show says it all.

Direct link | Posted on Jan 6, 2015 at 16:56 UTC
In reply to:

qwertyasdf: Hey, I heard that Pentax will finally release a FF DSLR next year.....for the 10 past years.

I will believe Pentax is doing a FF DSLR when I see it and it's available for purchase and not a moment before.

Direct link | Posted on Jan 6, 2015 at 16:54 UTC
In reply to:

linzdoctor7d: Does that look like a hinge on the side for a flip screen?


Direct link | Posted on Jan 6, 2015 at 16:47 UTC
On Adobe to acquire Fotolia for $800 million cash article (25 comments in total)
In reply to:

Funduro: Adobe can take its CC thingy and stick it in Russia for all I care.

Here's betting Russia would love to have it.

Direct link | Posted on Dec 18, 2014 at 20:22 UTC
On Tamron 16-300mm Di II VC PZD real-world samples article (110 comments in total)
In reply to:

h2k: Why not mention the lens' s widest apertures in the headline or at least in the text?

It's in the first line of the article.

Direct link | Posted on Dec 8, 2014 at 23:23 UTC
On Price released for Brikk's 24k gold Nikon Df article (389 comments in total)
In reply to:

dougjgreen1: I was sure this was a joke when I first heard about it.

It still is.

Direct link | Posted on Nov 6, 2014 at 17:10 UTC
On Price released for Brikk's 24k gold Nikon Df article (389 comments in total)
In reply to:

Phenixburn: This has to be either the worst idea I have ever seen in the realm of photography, or a true stroke of brilliance that I simply do not have the capacity of understanding?

One thing is for certain, if you buy this, if you even think about buying this, you will no doubt be considered among the Douch-bag elite!

Look at it this way: Someone has pulled out all the stops, giving their all to make Hasselblad look good by comparison.

Direct link | Posted on Nov 6, 2014 at 17:03 UTC
On GoPro announces Hero4 lineup article (113 comments in total)
In reply to:

Jogger: Still no optical image stablisation.

I wouldn't expect it to. The way to make an action/indestructible cam is to eliminate as many moving parts as possible.

Direct link | Posted on Sep 29, 2014 at 19:10 UTC
On Sony SLT-A77 II First Impressions Review preview (684 comments in total)
In reply to:

Michael Ma: Sometimes GPS comes in handy when trying to remember exactly where you took it.

I think people are oversensitive to private data that no one would ever care about. OK, so you went to Yosemite National Park and a TGIF for a company dinner. Guess what, no one cares.

They added Wifi, they took away GPS. I imagine they did what they did because they figured out what most people will actually pay for and the eternal battery life/CIPA #pictures taken tradeoff.

Direct link | Posted on Sep 12, 2014 at 15:56 UTC
Total: 118, showing: 21 – 40
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