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 K-01
Pentax K-x
Pentax *ist-DL
Sigma 10-20mm f3.5 lens for K-mount
Sigma 17-50mm f2.8 lens for K-mount
Pentax FA 35mm f2.0
Pentax DA 18-55mm f3.5-5.6
Pentax DA 55-300mm f4-5.6
Pentax ZX-5n (35mm film)
Pentax K1000 (35mm film)
Canon HF-G20
Canon HF-S200
Sony HDR-HC9
Sony DCR-TRV320
Adobe Lightroom 6.0
Adobe Photoshop CS5.5
Sony Vegas Pro 13


Total: 130, showing: 21 – 40
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In reply to:

CaPi: This article raises a point: We enthusiasts are willingly being exploited. The rest of the population isn't willing to be part of that. I currently take part in a metal cruise. I carry primes.. Zooms .. the works. The mix of bad lighting indoor misc scenes and daylight scenes when on trips takes it all. I have a list of new stuff I believe I need. The other participants humor me and use their top of the line phones. Guess who has pictures up first? The use apps that let them process and post in only two steps. Me? I get to stay up late and fire up a notebook to post process. Guess who will se the difference when posting pics on web? Only us enthusiasts. No one else. Why pay for the nose for gear and software and be a mule carrying it all over the planet? That's the killer for this industry. Use case driven development wins the day. Gear for the sake of fractional improvemt is only for us camera romantics

@Anthony Mazzeri
You mean like this?: http://www.sony.com/electronics/interchangeable-lens-cameras/ilce-qx1-body-kit

Link | Posted on Sep 2, 2015 at 17:08 UTC
In reply to:

kdt82002: I still use P & S because I find smartphone pictures to be inadequate when viewing on 23+ inch computer screens. A phone picture can be noisy and even a little out of focus but still look "great" on a phone screen. Bring it up on a big screen and its flaws are revealed.

This is a big reason I instantly upload NOTHING to the internet. I like to review EVERYTHING I shoot on a big screen, do a little sweetening of the image (If I keep it at all) and then maybe upload it.

I think the real reason the camera market is cratering is DSLR's have gotten really, really good. The huge upgrades in resolution & dynamic range are no longer there to be had. Most folks, even at the high end, are basically happy with what they have. So the camera market is doing a fundamental reordering from buy the latest-new-and-improved to the buy-when-it-breaks model.

Link | Posted on Sep 2, 2015 at 16:39 UTC
In reply to:

Xenol: It's a Northrop T-38 Talon, not an F-18.

Your argument doesn't make sense or the article has been corrected. The picture of the plane is clearly a T-38. The article says "The next stage involved using a T-38 supersonic jet ...".

Link | Posted on Sep 2, 2015 at 15:43 UTC
In reply to:

boinkphoto: T-38, beautiful but ancient plane. Amazed they're still flying the things...

Small, simple, and cheap...sounds like just the ticket for a trainer.

Link | Posted on Sep 2, 2015 at 15:29 UTC
In reply to:

bluevellet: lol

At the official website, in 'm43' mode, the lenses become the heaviest and biggest of all of the different mounts. Not to mention the least useful focal lenghts.

Sooooo, you would prefer the lenses not be available in u4/3 mount?

Link | Posted on Aug 20, 2015 at 22:01 UTC
In reply to:

belle100: Judging from the price, they must all be much higher quality. However, I don't understand why it needs to be higher quality than their still counterparts. I mean the resolution of 4K is 4096x2160, which is much lower than those of still image (typical 24MP) required.

The problems are not of resolution. For video+film the first problem is accurately setting focus manually. Still lenses these days usually have a very short level of rotation or "throw" from close up to infinity. Cinema lenses have a much longer "throw", upto 350 degrees on some Zeiss lenses. Imagine shifting focus accurately back-and-forth manually between two actors having a conversation and you will get the idea. Problem #2 is still lenses are more prone to "breathing", ie. the Field of View noticeably changes with changes in focus. The video+film guys hate that.

Link | Posted on Aug 12, 2015 at 03:26 UTC
On article Sony reportedly shifting focus to full-frame cameras (447 comments in total)
In reply to:

Samuel Dilworth: Full-frame suits Sony’s image of itself if not necessarily its brand image as perceived outside Minato City.

I hope this move strengthens Micro Four Thirds, which is to me the most useful mirrorless platform.

And I hope it gives Nikon and Canon a kick up the fundament, assuming said fundament is accessible given that they’ve been resting on their full-frame laurels for the past five years.

@ Mordi
If you are wanting to slam Micro Four Thirds, this is the better comparison: http://camerasize.com/compare/#525,624

Having said that, the lenses remain smaller than either their APS-C or FF equivalents. And against Nikon or Canon DSLR's they remain tiny: http://camerasize.com/compare/#525,290

Link | Posted on Aug 6, 2015 at 19:18 UTC
In reply to:

nathantw: This is really cool. I enjoyed it.

As for using the D810 and sticking out like a sore thumb, he probably wouldn't if he decided to use a small prime lens instead of a hulking giant lens like the 24-70mm f/2.8.

The Nikon D810 is a pretty big body. Here it is compared to another FF body, the Sony A7R II: http://camerasize.com/compare/#557,624

Link | Posted on Jul 16, 2015 at 21:37 UTC
On article Panasonic Lumix DMC-G7 Review (495 comments in total)
In reply to:

RingoMan: I cannot see the advantage of the electronic shutter if the noise is this bad! Not only bad noise but severely shifted colors in shadows! Further, is the flash sync limited to the mechanical shutter? And why would this low shutter speed sync make this camera attractive to the flash fill shooter?

The advantage of electronic shutter is that it is completely silent. This means you can get BTS pictures/video without disturbing a shoot already in progress. I would imagine wildlife would also appreciate silence. They usually do.

Link | Posted on Jul 8, 2015 at 23:24 UTC
On article Canon warns about dangers of counterfeit camera gear (154 comments in total)

I've saved a few dollars on batteries for a camera vs. buying OEM batteries, but there I relied on the reputation of the seller, B&H.

Link | Posted on Jul 3, 2015 at 00:11 UTC as 52nd comment | 1 reply
In reply to:

jabz: So can someone please tell me how I can achieve this with a Sony a7 II, which lens do I need?

The lens needed is a tad more expensive than the camera used in this article. Enjoy:


Link | Posted on Jul 1, 2015 at 21:52 UTC
In reply to:

sdh: I saw martians building a military base - somebody warn the president!!

He'll read about it in the newspaper - just like everybody else.

Link | Posted on Jul 1, 2015 at 21:49 UTC
On article Accessory Review: Western Digital My Passport Wireless (84 comments in total)
In reply to:

gmarmot: I've always wondered why devices such as this and other standard external drives, are not made with solid state components. I have an Apple MacBook with solid state drive, and it's been flawless. For me, I'd pay the extra money for this feature and it's accompanying ruggedness (I assume it would not be over double the price?).

You might be willing to pay the price, but a lot of folks will not. My own inclination would be to use/buy a bunch of 32GB/64GB/128GB SDHC/SDXC cards and a SD card wallet. I end up with the storage capacity of this unit without the shock resistance/ruggedness worries. Explicit in that is offloading images/video is done only after the trip is over.

I recently did this with a two week trip to Israel. Worked great.

Link | Posted on Jul 1, 2015 at 21:43 UTC

Especially with the release of the new Sony A7RMII, the pricing on these is about to get blown into the weeds. I think they'll be getting rid of another CEO soon as well. I wonder what his golden parachute is?

Link | Posted on Jun 15, 2015 at 19:11 UTC as 8th comment
On article Sony rides wave of US Mirrorless sales surge (733 comments in total)
In reply to:

colwilliams: Mirrorless and DSLR's and compacts and cameras-on-phones will sit side by side in the marketplace.

but for sometime now the mirrorless vs DSLR arguing has been simmering, similar to the Mac vs PC and Nikon vs Canon.

But, DSLR's are not dying and mirrorless are not taking over. It is not a war or a battle.

DSLR's are still chunkier and fit my hands much better than any mirrorless I've held. Plus battery life on mirrorless is not so great when you are exclusively using EVF and LCD to frame. The optical viewfinder on DSLR's is still more user friendly with no energy usage.

All I am saying is that there will always be a demand for all format cameras, without one eradicating the other.

@Stan Chung
Battery life is highly variable. On the GH3/4 series, it really isn't a problem. The Sony A7 series on the other hand...

Link | Posted on Jun 8, 2015 at 03:28 UTC
In reply to:

Don Karner: Where can we buy said adapter?

The point is it isn't out yet so there is no 'where' yet.

Link | Posted on Apr 26, 2015 at 01:42 UTC
In reply to:

Don Karner: Where can we buy said adapter?

"The EF-MTF adapter is due to go on sale in May at a price of $285."

Link | Posted on Apr 26, 2015 at 01:16 UTC
On article Interview: Canon's Chuck Westfall on the new XC10 (352 comments in total)
In reply to:

ThePhilips: "It’s important to remember that part of the story of this camera is to reduce the size, weight, and cost."

I LOLed.

All true, but given the M series is aimed at the lower end of the market, you would not have a camera Canon could try to charge $2500 for as they are attempting to do with the XC10.

Link | Posted on Apr 26, 2015 at 01:08 UTC
On article Interview: Canon's Chuck Westfall on the new XC10 (352 comments in total)
In reply to:

Papi61: Let's see, for about the same price you can get this Canon thing or a Samsung NX1 with a 16-50 f/2-2.8 lens.

Gee, which one do you think would give you better quality video and stills? ;)

Not arguing your point on aps-c at all. Just adding to the available alternatives at the price.

Link | Posted on Apr 26, 2015 at 00:46 UTC
On article Interview: Canon's Chuck Westfall on the new XC10 (352 comments in total)
In reply to:

BaumBoyPhoto: This camera may be useful, and the ergonomics are intriguing to say the least. I will probably end up renting it as a B-Cam for one of my run of the mill video gigs just to see how it handles. I don't plan on buying it, though. Definitely not at this pricepoint.

I mean, Chuck repeats often that some limiting design decisions were made to reduce cost, but I fail to see him convince us that the $2,500 is worth what is offered. I just don't see it. It definitely feels like paying a premium for slightly better ergonomics, bit rate, and the Canon name tag, while sacrificing the flexibility of Interchangeable lenses.

$2,500 can get you solid photo performance.
$2500 can get you decent video performance.

If you are heart set on a 4K hybrid, just about everyone in this thread has pointed out how much $2,500 can get you in that market.

It's just not a great pricepoint for Canon.

Here's your pricing hint on the Sony PXW-X70


Link | Posted on Apr 26, 2015 at 00:41 UTC
Total: 130, showing: 21 – 40
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