Thomas Kachadurian

Thomas Kachadurian

Lives in United States Traverse City, United States
Works as a Photographer
Has a website at
Joined on Dec 29, 2002


Total: 73, showing: 1 – 20
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On What is equivalence and why should I care? article (1726 comments in total)
In reply to:

forpetessake: Will this article finally stop those f2=f2=f2 stupid arguments? I doubt it. Stupid arguments come from stupid people: those same people who were explained the equivalence to many times before without any success.

But it IS when you are talking about exposure. But only exposure. You don't expose a M43 lens differently than a FF lens if you are using a handheld meter. Unless you are using extension tubes and there is bellows factor, exposure is the same.

Direct link | Posted on Jul 7, 2014 at 20:04 UTC
On What is equivalence and why should I care? article (1726 comments in total)

The one clarification that is missing is that this does not hold with exposure.

If I expose a photo at f4-1/125-iso400 with my Canon 6D and a 50mm lens, and it is the correct exposure, then make second photo in the exact same conditions f2-1/125-iso400 with my Olympus EM-10 and a 25mm lens the second photo will be 2 f stops over exposed.

Exposure for that scene will be f4-1/125-iso400 with any lens camera combination a Sony RX100II, a Panasonic GH4, A Nikon d7000, a Canon 5D3, or a Hasselblad film camera. Crop factor does not change exposure.

I cannot tell you how many of my students come to me confused about their photos because they read about equivalency on the web and adjusted their exposure accordingly.

Direct link | Posted on Jul 7, 2014 at 19:59 UTC as 226th comment | 9 replies
On Nikon D810: What You Need to Know article (137 comments in total)

This might be the best assessment of "What's New" for any camera I've seen. I'm not even a Nikon guy, but this lays it out. Great work DPR staff. I hope you'll do this more often with other cameras.

Direct link | Posted on Jun 27, 2014 at 16:21 UTC as 12th comment

Sorry, not too moved by these photos.

I hope its the fact that they're on the web and not in person.

Direct link | Posted on Jun 24, 2014 at 00:23 UTC as 11th comment | 1 reply

I can find DNG converter 8.5, but not ACR 8.5. My CS6 is still running 7.xx.

Anyone know how I get to 8.xx

Direct link | Posted on Jun 20, 2014 at 19:00 UTC as 5th comment | 1 reply
On Never lose your lens cap again with HACkxTACK article (165 comments in total)

And pockets don't work why?

Direct link | Posted on Apr 15, 2014 at 23:17 UTC as 71st comment | 1 reply

too long.

Direct link | Posted on Mar 27, 2014 at 13:24 UTC as 33rd comment

One reason. Prices too high. Canon issues an overdo update, calls it mark II and doubles the price. The way tech prices evolve the canon 5d3 should be 2,000, tops.

We're still buying stuff, but we're buying it used.

Direct link | Posted on Feb 25, 2014 at 02:54 UTC as 43rd comment
On A look inside Sigma's lens factory article (89 comments in total)

Kinda depressing with the cold and music.

Direct link | Posted on Feb 15, 2014 at 15:50 UTC as 33rd comment | 2 replies
On AP cuts ties with Pulitzer-winning photographer article (170 comments in total)
In reply to:

LeitzKameraAktion: Nick Ut's famous 1972 Vietnam image of naked 9 year old Kim Phuc running down a road, after being burned by Napalm, looks far more dramatic and scary when seen in its familiar cropped version, which eliminates almost half the right side of the image. The full image lacks the intensity and concentration of the cropped version, because the figures on the right seem uninterested and unconcerned about the drama taking place just ahead of them. Cropping the image focuses one's attention on the traumatised children, and their anguished expressions. For me. Contreras' manipulation was done in much the same spirit; to eliminate distracting detail in order to focus one's attention on the essentials. While the end result might not be literally accurate, it does not falsify the reality or authenticity of what's being depicted - the core-truth if you like. Suppose Contreras had physically removed the video camera BEFORE taking his shot; how is that morally different to doing it electronically?

Excellent point. It's not a question of what was removed but how.

Direct link | Posted on Jan 24, 2014 at 12:27 UTC

Are these supposed to make me want to get on the CC bandwagon. Nope.

Direct link | Posted on Jan 16, 2014 at 19:19 UTC as 39th comment | 2 replies
On Nikon AF-S Nikkor 58mm f/1.4G review preview (414 comments in total)

Just as FF didn't matter when nikon didn't have it, and 12 megapixels was enough when that was the best Nikon could do, DPR is shilling for Nikon.

How about comparing it to the $500 sigma 50?

Silver award? I think I've got to go out to my recycle bin, I might have some silver award winners in there. Never mind. They say Coke, not Nikon.

Direct link | Posted on Jan 1, 2014 at 01:47 UTC as 70th comment
On Have Your Say: Best Lens of 2013 article (89 comments in total)

For me there was nothing new I wanted.

Direct link | Posted on Dec 20, 2013 at 00:40 UTC as 15th comment | 1 reply
On Backstory of Phantom Flex4K video shot at 1,000 FPS article (91 comments in total)

Yawn. High resolution and detail are only worth something if the video holds your interest. There's a point where this sort of slowed pace makes it dull and hard to watch.

Direct link | Posted on Dec 16, 2013 at 14:57 UTC as 8th comment

Seems odd that the hard to find Samsung NX, with a limited lens line is chosen over the many Panasonic and Olympus offerings. These days you can buy an EM5 with a 14-42mm for under $1000. and they are practically giving G6s away.

Direct link | Posted on Dec 5, 2013 at 16:08 UTC as 2nd comment
On Adobe expands Photoshop and Lightroom offer article (628 comments in total)
In reply to:

ShelNf: It's going to interesting in the future if/when CS6 doesn't support the latest cameras. Something will have to give...

PS isn't so valuable as a raw converter, just as an editor. You can convert your raw files in many programs, then edit them in your old photoshop. Or use the latest free DNG converter.

Direct link | Posted on Nov 21, 2013 at 20:57 UTC
On Adobe expands Photoshop and Lightroom offer article (628 comments in total)

Still not buying. I'm plenty happy with CS6 and look forward to years of using it without having to learn new twists and turns every 18 month.

Software subscriptions. See ya.

Direct link | Posted on Nov 21, 2013 at 20:49 UTC as 148th comment | 2 replies
On PPE 2013: Hands-on with Panasonic's newest cameras article (37 comments in total)

Orange? Really? Does it have to be Orange?

Direct link | Posted on Oct 25, 2013 at 18:53 UTC as 18th comment | 2 replies
On Panasonic DMC-GM1 preview (639 comments in total)

DPR is struggling to find something to complain about. Sure it's small, that's the point. There may be only one new lens but my trusty m43 lenses will all fit just fine.

It's the PERFECT companion to a GX7 or EM5 travel system as a back up body that will work with all the lenses in a pinch and is the perfect thing to slip into a pocket with the 28mm when going to dinner or those times when you don't take the full kit. I'll buy one.

Direct link | Posted on Oct 17, 2013 at 21:05 UTC as 85th comment | 2 replies
On iPhone 5s Studio Comparison article (263 comments in total)

It would be more helpful to compare it to a real camera. Why are the all turned off?

Direct link | Posted on Sep 22, 2013 at 22:47 UTC as 26th comment
Total: 73, showing: 1 – 20
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