September 01, 2014, 10:06:27 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Topics - TrumpetPower!

Pages: [1]
1
EOS Bodies - For Stills / Networkable DSLRs trivially hacked
« on: March 25, 2013, 11:29:18 PM »
Here're a couple security researchers giving an hour-long presentation at Shmoocon. They demonstrate that the 1Dx is basically an open sieve when it comes to security.

http://www.youtube.com/watch?v=u7RjJNLnWF8

If you turn on WiFi or plug in a network cable to your DSLR, basically anybody can do anything they way to it. Read all the pictures off the card; upload whatever they want to the camera (think of somebody uploading something really nasty and then tipping off the police officer standing right over there); even turn the camera into a remote surveillance device without your knowledge.

I'm sure Canon will fix this; they won't have any choice. I'm also sure it'll take a while, and that they won't get it right the first or even the umpteenth time. That's just the way that big companies new to networking react...they'll ignore it for a while, then grudgingly make a half-assed attempt at fixing things that won't do anything, and eventually reach a state where there're constant minor updates to stay on top of with the odd more major one just to keep things interesting.

But, in the mean time, you would be well advised to only turn on WiFi in areas where there is no possibility of anybody hostile being within physical range of your camera's WiFi signal. Similarly, only plug the camera's ethernet cable into a secured and trusted network fully firewalled from the Internet.

It's a same, because I was just thinking of how neat all this WiFi control stuff could be. Ah, well. Some day....

Cheers,

b&

2
HDR - High Dynamic Range / Here comes the Sun!
« on: January 27, 2013, 11:33:13 PM »
This past summer, a ring of fire set over the Grand Canyon. I was there, at Lipan Point, attempting the hardest photographic challenge I've tried yet: to capture the experience of an annular solar eclipse over the Grand Canyon. I think I might have succeeded. At this resolution, the dot of the Moon is just barely visible in the composite, but at full size it's as visible as in the black-and-white crop.

The composite was shot on a 5DIII with the TS-E 24 II. Three masked frames from the seven-shot two-stop bracket make up most of the composite. Another two frames make up the black-and-white crop, which I then layered in with the rest with a bit of Photoshop reconstruction.

If anybody else has attempted to photograph the Sun and something else in the same frame, and managed to retain detail in both, I'd love to see it!

Cheers,

b&

3
Lenses / Ultimate giclée lens?
« on: January 26, 2013, 11:38:59 AM »
So, I do a bit of fine art reproduction / copy / giclée work, and I'm expecting to do more in the future.

I get great results with the Canon 50mm f/2.5 Compact Macro.

More is always better, of course, which is why this question.

Can anybody offer a recommendation of a significantly better lens to use (with a 5DIII)?

At optimum aperture (presumably somewhere in the f/5.6 - f/11 range), it must be visibly (not just measurably) superior in all these categories, in this order of importance:

  • Distortion. The CM is virtually distortion-free. Any candidate lens must have no more distortion than the CM.
  • Sharpness. The CM at f/8 is very sharp, but I suspect there might be even sharper lenses by now.
  • Corner sharpness. The CM is very good in the corners at f/8, but not quite as good as in the center.
  • Light falloff. Again, at f/8, this is well controlled with the CM. A candidate lens shouldn't be worse, but my workflow already compensates for less than perfectly even illumination so it's my least important criteria.

I'm confident that the CM is far and away the best lens that Canon offers for this type of work...the question is if there's anything anybody else offers that's even better.

I'm aware of the Zeiss f/2 Makro-Planar, but the distortion comparison at The Digital Picture

http://www.the-digital-picture.com/Reviews/Lens-Distortion.aspx?FLI=0&FLIComp=0&Lens=727&Camera=453&LensComp=287

shows, to my eye at least, visibly more distortion for the Zeiss, which makes it a non-starter. (If the difference is more due to lack of proper alignment of the test target in Bryan's comparison, I'll reconsider.)

Given the versatility of the Canon mount with adapters, I'm willing to consider anything that can be physically attached to the camera. Basically everything is on the table, including even medium format lenses. But the Canon 50 CM seems to have the least distortion of any of the competition in Bryan's database, which makes it a very hard act to follow.

So...any suggestions, or is this already as good as it gets?

Thanks,

b&

4
Software & Accessories / RSS L-plate for 5DIII w/ BG-E11 grip
« on: July 01, 2012, 11:52:21 PM »
My L-plate from RSS just arrived, and it's sweet. All rounded, fits like a glove, couldn't be smaller, and it's easy to get to the batteries and ports.

What's more, the grip actually feels good in the had when held in portrait orientation (unlike the RSS L-plate for the gripped 5DII). My initial thought is that I just might not take it off. Indeed, with the Black Rapid attached to one of those little Wimberley clamps attached to the side (not bottom) of the clamp, the camera feels (almost) as good in the hand in portrait orientation as in landscape. Honestly, the worst part is that the center of gravity shifts to the outside (which, of course, is what the grip does all by itself). Other than that...well, again, it feels good. The L-plate is more of a continuation of the grip than something bolted on as an afterthought.

Yeah, the whole rig is big and bulky and heavy -- of course. But it's not at all uncomfortable.

Cheers,

b&

Pages: [1]