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: 174, showing: 1 – 20
« First‹ Previous12345Next ›Last »
On article Gear of the Year 2017 - Richard's choice: Sony NP-FZ100 (247 comments in total)
In reply to:

Abrak: Sony pulled off a very neat trick with this battery. Battery-wise, Sony users fell into 2 Groups - those that didnt want a bigger battery because they didnt want a bigger camera and those who wanted a bigger batter necause the 'needed' longer battery life. Sony satisfied both Groups by increasing battery life without a sizable increase in the battery or camera.

A side effect of the bigger battery is a bigger, more appropriately sized grip for handling the large, heavy lenses often hanging off the front of the camera.

Link | Posted on Nov 30, 2017 at 18:01 UTC
On article Gear of the Year 2017 - Richard's choice: Sony NP-FZ100 (247 comments in total)
In reply to:

shademaster: That's the sexiest product photo of a battery I've ever seen!

I detect an under-current of animosity.

Link | Posted on Nov 30, 2017 at 17:57 UTC
On article Gear of the Year 2017 - Richard's choice: Sony NP-FZ100 (247 comments in total)
In reply to:

yslee1: Come on, it's not like this is the first big battery that has made its way to a mirrorless. The GH3 and the EM1 II both have had DSLR-sized batteries before the Sony.

Indeed. A few years ago I went on a trip to Israel. Hiking from Nazereth to Sea of Galilee (4 days, 40+miles/60+ Km) was part of it. I chose a GH4 over Sony's offerings and battery life was part of the decision.

Link | Posted on Nov 30, 2017 at 16:21 UTC
In reply to:

Roland Karlsson: OK. Nice. Videos with talking people. Giving nice and cozy non tech talks.

OK - I also know what light filed is.

But - what can this thingie actually do?

And - how is it exactly used? What do you gain to normal cameras? Maybe show some examples of its awesome tricks?

It allows them to fill up their storage space even faster than ever before. Thought 4k/6K/8K Raw was high data rate? You've likely seen nothing compared to this. I'd like to know how many GigaBytes/second this thing generates.

Link | Posted on Nov 30, 2017 at 15:57 UTC
In reply to:

cosinaphile: what do they expect with bullwinkle running things??


Correction: Bullwinkle is the CFO, so I have to assume Rocky is the CEO.

Link | Posted on Nov 15, 2017 at 17:56 UTC
In reply to:

SirSeth: Do you think an A7iii is on the heels? That's what I was expecting next. What would Sony hold back to differentiate? Maybe dual SD, battery, and 36mp without the FPS of the A9 or resolution of the A7Riii?

I would bet the A7M3 will stay @ 24MPixel, just as the A7RM3/A7RM2 has stayed at 43MPixel and the A7SM1/A7SM2 has stayed at 12 MPixel. But I'm also hoping it gets the larger battery as a change in body for one likely means a change in body for all. Whether it's the A7 series or A6xxx series, Sony has gotten beaten up for years now about small batteries/poor battery life. I'm hoping the A7M3 also finally gets 4K video with a sensor that doesn't overheat as well.

Link | Posted on Oct 25, 2017 at 17:39 UTC
In reply to:

armandino: ehehe, I feel the D850 crown was shortlived...

Not really - They are all very, very good.
Feel free to pick your poison and shoot away.

Link | Posted on Oct 25, 2017 at 17:29 UTC
In reply to:

User1040523857: What is the real need for a second storage card? They are currently available in huge sizes and almost never fail. Is Video driving this need, or a suspicion that even if you haven't ever had a card malfunction, and your friends haven't either, that there will be one where you need a card that is backing up what is already being stored on your original card? I understand that it is nice to have, but why is it essential? A better solution would be a small battery powered hard drive with communications that could store photos or video as taken in the same way tethered works.

1. Huge sizes - yes video is driving this. If you use the camera to record a locked off shot (seminar, wedding) 4K @ 100 Mbs is about two hours on a 128 GB card.

2. "...and almost never fail". For some, almost is not good enough. Any sort of one time event like a wedding, seminar, concert or legal deposition, or flying to the other side of the world event, be it professional or personal. It's called running all the odds in your favor.

Link | Posted on Oct 25, 2017 at 17:18 UTC
In reply to:

CaPi: High-Pixel-Count 10fps..
PC software pixel shift for even more pixels

Who are you building this for Sony?
The D850 now this?
Hoe many cameras for niche markets does the world need?

The A9 for the Sports Pro Markets..

Its not for me.. all of it.

Sane cameras for real world challenges please.

You do understand when the new model rolls out the previous one(s) drop in price? Providing products for multiple levels of budget & features?

Link | Posted on Oct 25, 2017 at 17:10 UTC
In reply to:

mike emerson: Just put in a search for yashica.com and this is what you get. A blank page. Get my drift?

It isn't blank...but there isn't a whole lot there.

Link | Posted on Oct 16, 2017 at 21:46 UTC
In reply to:

linzdoctor7d: Something tells me A-mount won't be included!

Given the article picture from Manfrotto shows a Sony A9, I think E-mount is a given.

Link | Posted on Oct 6, 2017 at 15:53 UTC
In reply to:

Tommygun45: If Leica gets in on this partnership we are all in trouble. (That's a WWII joke)

@ TommyGun45
I think Zeiss already has things covered...

Link | Posted on Oct 4, 2017 at 17:34 UTC
In reply to:

Matt J Photo: gotta do what you gotta do to get the shot.

And....The legal system is about to give them its best shot.

Link | Posted on Sep 7, 2017 at 03:51 UTC
In reply to:

cosinaphile: still, the investors who paid for the r and d and paid heartily for the privilege of owning this are still screwed .... if there was justice then the money the equity firm paid would be made public and would be used to give panono backers their products at production cost

I'm glad this was saved but sorry for the backers who were screwed .... the sale should have been structured to put the full force of fulfilment as the highest priority .. as it stands its just a slightly convoluted instance of the ongoing corporate theft poisoning, ....well ....everything

and leaving the small guy screwed to serve the interests of the powerful

"well those sponsors invested their money"

No, they gave it away. And bankruptcy of the company means the possibility of getting a cheap, first round release of the product, the only return they ever might possibly see, went poof! For those angry that this is what crowdfunding means, welcome to the real world.

The only possible reason for Professional360 to honor those early crowdfunders isn't some vague "moral obligation" or "justice". It's positive PR.

Link | Posted on Jul 14, 2017 at 00:25 UTC
On article Sony a9 Full Review: Mirrorless Redefined (2756 comments in total)
In reply to:

K1000usr: My ignorance shows here, but why are these mirror-less cameras beholden to such huge lens designs .!?

The bodies are shrinking, since there is no mirror involved. But look at this lens shown above in the title page. (Yes, it is a zoom lens, and some lenses shall be big/huge..)

Is this a reason why Olympus will still keep on shining? (Sony has impressive performance specs, no doubt. The camera looks compact, and really solid. I would want to own it. But only if its combination with a 24-70mm zoom is less voluminous than my K-1 with Pentax 24-70mm!)

The bottom line is lens size is proportional to sensor size. If you are expecting significant reductions in lens sizes you need to move to cameras with smaller sensors. Removing the mirror from the camera is irrelevant to lens size.

Link | Posted on Jun 19, 2017 at 15:16 UTC
On article How do you know you need a new camera? (410 comments in total)
In reply to:

stanic042: I wonder how long will I bang the Pentax K5IIs around :)

People have been predicting the end of Pentax since forever. Pentax has ALWAYS been using someone else's sensor - be it Samsung, Sony, or film. I really don't think Sony had anything to do with the sale of Pentax by Hoya to Ricoh. Hoya had stripped out of Pentax what they wanted - medical imaging - and Ricoh was eager for an established point of entry into the DSLR market. They both got what they wanted.

Link | Posted on Jun 1, 2017 at 13:52 UTC
On article How do you know you need a new camera? (410 comments in total)
In reply to:

stanic042: I wonder how long will I bang the Pentax K5IIs around :)

If it makes you feel any better, I'm still using a K-01.
But given I also shoot video - with a GH4 - the K-01 is probably my last Pentax.

Link | Posted on May 31, 2017 at 05:19 UTC
In reply to:

sibuzaru: see, if they used USB-C 3.1 it wouldn't need a dummy battery to connect to the camera

Agreed. I think whoever came up with micro-HDMI should be shot. I have it on my GH4 and hate it - it's so tiny, fiddly, and fragile. mini-HDMI was much, much better.

Link | Posted on Apr 27, 2017 at 18:47 UTC
In reply to:

Pritzl: I don't get it. Don't we buy mirrorless cameras to save on size/weight? How is lugging that lump along a good solution? I'm disappointed by the slow pace of development in battery technology.

Battery technology development has pretty much ALWAYS been slow. Big changes usually involve different materials. I would not look for this to change anytime soon.

Link | Posted on Apr 27, 2017 at 18:31 UTC
In reply to:

rz350: At last. Someone with a more expensive 360 camera than Nikon.

This is nothing. Check this one out at triple the price:


Link | Posted on Apr 12, 2017 at 23:47 UTC
Total: 174, showing: 1 – 20
« First‹ Previous12345Next ›Last »