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: 139, showing: 21 – 40
« First‹ Previous12345Next ›Last »
In reply to:

Mssimo: I think the number 4 is thought to be unlucky in Japan if I remember correctly. Maybe that is why the skipped D400 name. No idea why they kept D4 and others.

And there is also the Panasonic GH4.

Link | Posted on Jan 7, 2016 at 03:39 UTC
On article Kodak revives Super 8 with part-digital cine camera (362 comments in total)
In reply to:

Francis Sawyer: I was going to applaud Kodak for creating this somewhat perplexing but bold product... until I saw the price. The price for the camera is too high, but the price for the film is PREPOSTEROUS. Why in hell would anyone pay that, when most people have no way to project film and the included scan isn't going to be as good as what you can shoot with a BlackMagic Pocket Cinema camera?

This whole thing is baffling.

Not only will the included scan not be as good as a Black Magic Pocket Cinema Camera, it won't be as good as a Panasonic GH3, a body almost half the cost of a BMPCC.

Link | Posted on Jan 7, 2016 at 03:15 UTC
On article Ricoh teases spring 2016 full-frame Pentax DSLR debut (520 comments in total)
In reply to:

RedFox88: So this will be a sony camera (sensor ) with a k mount.

You do realize many, maybe even most, of Nikon's camera have a Sony sensor? I don't think that makes them Sony cameras.

Link | Posted on Sep 21, 2015 at 13:40 UTC
On article Ricoh teases spring 2016 full-frame Pentax DSLR debut (520 comments in total)
In reply to:

LincolnB: Is it possible to verify from the photo that it is still a K-mount?

If it isn't K-mount, then Pentax likely just went bankrupt.

Link | Posted on Sep 21, 2015 at 09:35 UTC
On article Ricoh teases spring 2016 full-frame Pentax DSLR debut (520 comments in total)

What would you like to see from a full-frame Pentax DSLR?

Available for purchase.

They announced that it was nine months in the future, now it's another six months in the future, at this rate by the time it is released its time will be passed.

Link | Posted on Sep 21, 2015 at 09:29 UTC as 27th comment | 3 replies
On article Sony brings uncompressed Raw to a7S II, a7R II and... (562 comments in total)
In reply to:

Earthlight: This is really good news for starfield shooters. I will start saving my pennies for this camera and a metabones adapter.

With this resolution, DR and lossless RAW this cam will serve me for a long long time. The only thing that worries me is battery life, but I can probably plug in a USB power bank and be set for loooong sequences in cold climates.

Something like this? https://vimeo.com/125775652

Link | Posted on Sep 18, 2015 at 00:33 UTC
In reply to:

Create: All the Canon and Nikon fanboy neurotics are at it again, 4 Sony cameras in the top ten, and yeah i know about clicks.

What makes that funny is Nikon uses Sony sensors, as does Pentax.

Link | Posted on Sep 11, 2015 at 04:28 UTC
In reply to:

chse: If you ask yourself why Sony is using that lossy compressed RAW, the answer is simple:
50% guaranteed compression lets you
- use older or cheaper components towards external memory
- use exising designs (save development cost) towards external memory
- use a bigger sensor - say 42MP instead of 24MP - without to much effort
- look better in the continuous shoot department
- sell the same cam under a differnt name as "professional" version

That sounds good except to take advantage of the higher quality 2K & 4K video recording modes of these new cameras you are required by Sony to buy newer SDXC U3 memory cards.

For cameras at this level there is no excuse anymore for using 7 bit offset compression schemes. Even in a Rebel there is little reason for these kinds of tricks. Storage space is not the issue it was 10 years ago.

Link | Posted on Sep 11, 2015 at 04:25 UTC
In reply to:

Steve in GA: Let's say you're on vacation, as I was recently in New Mexico. And, you have your wife, daughter and granddaughter with you. And, you're visiting one of the absolutely spectacular sights that NM has to offer, such as El Malpais National Monument.

At the natural bridge in the national monument, the clouds are moving across the sun, periodically changing the lighting. You want to get photos not only of the natural bridge itself, but also photos of your family enjoying the experience of being in such an exotic location.

That's going to mean that you're going to need to focus and expose on different elements in the scene. Sometimes people, sometimes the sky, sometimes the rocks.

Making your DSLR go through its paces to get all this done, and done well, is fun to me. I don't know, maybe I'm just an old nerd that enjoys making a complicated machine like a DSLR do what I want.

You're just an old nerd that enjoys making a complicated machine like a DSLR do what you want. And so am I.

Link | Posted on Sep 2, 2015 at 17:15 UTC
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 (494 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
Total: 139, showing: 21 – 40
« First‹ Previous12345Next ›Last »