October 26, 2014, 02:13:59 AM

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Messages - infared

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1
Lenses / Re: Sigma 50mm Art for $858?
« on: October 24, 2014, 09:37:55 PM »
Instead of skimping with a questionable retailer(that this appears to be)...If I was you...I would buy from someone VERY reliable with a no-questions-asked return policy...especially considering that there is a significant chance that you may get a bad copy  of this particular lens and have to return/exchange it.  I used B&h...got a bad copy, called them up and told them what was up and they graciously sent me another lens immediately.  You may not get one lens from a fly-by-night outfit...and you certainly won't get top-rate customer service from them.

2
EOS Bodies - For Stills / Re: clown* photographer
« on: October 24, 2014, 05:58:07 PM »
Clown photographer
Hey phenix...I guess My President has the camera pointed straight at YOU,

3
EOS Bodies - For Stills / Re: clown* photographer
« on: October 24, 2014, 02:32:27 PM »
I am reminded of...

http://www.youtube.com/watch?v=xyVTIjTDTg4&list=PLD78DF1BFEAAE0C1B

LOL!....I think they wrote the vid for me!!!! LOL!....I actually don't care how anyone else does their shooting, though....to each their own....I really do care about how I am going about it...that's all.

4
The Sigma 50A is an optically fantastic lens, with a very poor and unstable AF system. As I have stated in other threads, I do not understand how Sigma can push something as inconsistent as this to the market.

It is hard to reconcile the diverse opinions about this lens.  Some people like yourself report poor & unstable AF.  But reading the reviews on B&H, some seem to find the lens outstanding in every way, including AF.  So many reviews absolutely glow with praise!  I will have to try the 50A for myself at some point.  Is it possible that some copies are truly excellent while others are defective?
Yes...I got a defective one from B&H...spent a day screwing around with the Sigma Dock..etc...was making me CRAZY and I though..."why am I doing someone else's work for them??? on a $950 lens no less..."
I called B&H and told them the situation..and they were well aware of the issue..at least in a one-on-one situation and they sent me out another lens right away.  It was great...just some minor little tweeks on the Sigma Dock... Works great for my needs. BTW I am running the latest version of firmware on my 5DIII....but my experience would tell me that it is a lens issue..not a firmware issue...
For how the lens WOW's me....I thought that it was certainly worth the hassel.  ...and let's face it..the experience that I had is total bull S___!  LOL!

5
EOS Bodies - For Stills / Re: clown* photographer
« on: October 24, 2014, 12:25:28 PM »

[head spinning] Wow, I am simply floored by the ingenuity and creativity of some of you folks. I never cease to be amazed by those who will create such inventive systems by assembling a variety of disparate tools. Thanks for explaining that setup, and showing one of the resulting images. [/head spinning]

As for the original post, I expecting to be treated to an image of the iPad flying out of its user's hands, pulled by the turbulence from the flyover...

On the other end of things...I have NEVER shot an image with my Dumb Phone or my iPad.  LOL!
(its would just be too insulting to my craft!  LOL!  :-X)

6
However, from what I've read and saw in person, the extra special coatings on the Sigma, actually seem to make it a bit slower than 1.4.  It almost seemed that it was about 3/4 of a full stop slower than the Canon.
I'm still wavering, but at this point, I'm leaning towards the 50L 1.2.  I was able to shoot some MIGHTY dark bars with this and no additional lights with the 1.2 wide open.
So for when you need very low light...at this point, I'm leaning towards getting the canon 50L 1.2.
There are some topics relating experiences with F1.4 lens in Canon digital cameras, I did not find now, but the conclusion is surprising:

A member of CR did a test with an F1.4 lens (at F1.4) mounted on a Canon DSLR camera with all manual settings, and photographed a target with controlled lighting. Then he repeated the shot with everything the same, except that he put duct tape on the electrical contacts of the lens, so the camera could not identify which lens was being used.

He found that the picture looked darker when the camera could not identify which lens was being used. Neuro then gave a simple explanation and terrifying:

Digital cameras (unlike film) do not capture well the light that hits the sensor at a very tilted angle. How F1.4 lenses (and more luminous) many light rays arrive at quite tilted sensor, and do not penetrate well into the photodiodes. To circumvent this problem, Canon pushes the ISO (in secret) to simulate the use of light rays that exists in the film. Ie. When you select ISO100, the camera secretly push the ISO up to 153 (for example) and compensates for the lower utilization of light rays.

If you select ISO 1600, the camera pushes secretly up to ISO 2129 (for example), and compensates for the lower utilization of light rays. In this case, the noise will be larger than an ISO 1600 "true".

If the lens is not manufactured by Canon itself, ISO not be pushed secret, and the lens will appear darker than a Canon lens that had the ISO pushed.

Terrifying?... I save that adjective for things like Ebola and perhaps automatic weapons pointed at me. LOL!  8)

7
Infrared and VeloDramatic...   Glad you are having good luck with the 50 Art lens.

What body are you using your 50 Art on?

Do you use the outer focus points or mainly the center point?

5DIII single focus point...but move it around on the screen to where I want focus.  It is a WOW lens...and I totally disagree with those that are saying I must use it at f/1.4... That is just foolish.  I use it at varying f stops to get in focus what I want in focus in a particular image...could be f/1.4...or it could be f/3.5...whatever...and it is still sharper than all 3 of Canon's lens offerings as far as I am concerned.

8
EOS Bodies - For Stills / Re: clown* photographer
« on: October 24, 2014, 12:07:13 AM »
Wait...wait...I thought that I resembled that remark????....  8)
Infrared, is that a DIY ring light and power box?  If so, would you mind showing off the business end and telling us about it?

I'm always fascinated by DIY lighting.

oh boy..you just had to ask...didn't you...LOL! It's complicated. It is a light painting set-up.
Yes...I built the whole thing myself....using remote control car servos, fiber optics, wood, ammo box, etc...
It is a light painting set up that I built maybe 25 years ago...but I broke it out to shoot the clowns. (There was no photoshop back then...the stuff used to blow the minds of the guys at the lab..the wanted to know what the hell I was doing..LOL!!!!). The "box like" thing that I am shooting through has an opening and two "filters" that can be put in the window in front of the camera lens. One is soft diffusion the other is black out. (it is not a light source).
The box with the hose is an old army surplus ammo box...loaded with a projector bulb, mounted to shoot light on command down the giant encased fiberoptic "hose" ... The switches (levers) on the front side of the ammo box remote control the filters in the box in front of the camera, via radio transmitters from remote control cars. I can put the diffusion filter in or take it out in front of the camera at will as I light paint an image on the camera sensor.  On the end of the fiber optic hose I have a "flashlight-like" set-up... There is a lens inside the flashlight to focus the light if need be...I push the red button there and the light comes on whenever I want to "paint". I have all kind of attachments and filter holders...mini soft boxes, etc..that I can put on the head of the "flashlight" to shape and control the nature of the light.  Soft, hard, focused etc.
You turn out all of the lights.  Do a soft background exposure with the diffusion in front of the camera lens...to get a "base image" started on the camera sensor.....
Then I pulled out the diffusion filter in front of the lens by throwing a switch on the ammo box and start direct focused "flashlight" painting on all of the areas that I wanted to be sharp and call the eye's attention to.... 
You get into a groove...it is kind of like you are making a painting...lots of things to play with ...no two exposures are ever the same....
I used to do this with a 4x5 view camera and do tests on polaroids...and then just make like 20 images...on transparency film and see what came back from the lab... It can be quite wonderful.  ..and it is a bit time consuming ..but with a digital camera it is a lot more immediate and adjustable.
Fun stuff! It has a unique look that I really cannot recreate in PS...plus...it is really nice to interact in the real world and play... 8) People look at the photo and like it or not...but they have NO IDEA what went into making it...and I kindof get a kick out of that.
Yes...I spend a lot of time ..alone.!!!!! LOL!

9
The lens is quirky ...but awesome!
I had to send my first lens back...but the second one seems to be very good.

10
EOS Bodies - For Stills / Re: clown* photographer
« on: October 23, 2014, 01:37:42 PM »
"Pull magic knob"  Snicker.

I know...and this is supposed to be for kids...hence "Evil Clowns"! LOL.

11
EOS Bodies - For Stills / Re: clown* photographer
« on: October 23, 2014, 12:44:03 PM »
Wait...wait...I thought that I resembled that remark????....  8)

12
HDR - High Dynamic Range / Re: Post your HDR images:
« on: October 22, 2014, 11:04:25 PM »
Nice shots everyone!!!! Love the vehicles!

Great photo!

THANKS Candyman!

13
HDR - High Dynamic Range / Re: Post your HDR images:
« on: October 22, 2014, 05:51:12 PM »
Nice shots everyone!!!! Love the vehicles!


14
5D MK III Sample Images / Re: 5D MK III Images
« on: October 19, 2014, 07:27:29 PM »
Here are a couple more....
First one is my 5DIII..Second one is from my Olympus again..... :P

15
Reviews / Re: Camera Store Trashes New G7X
« on: October 19, 2014, 08:35:41 AM »
I am not in the market for one of these cameras but I think that the Panasonic LX100 may be the best option in that arena for an experienced photograper. It doesn't reach to 100mm but it has the Sony and definitely the Canon beat pretty much everywhere else...
I am an MFT fan along with my FF Canon, so perhaps I am a little biased. I use Oly's not Panny's...but the spec sheet on the LX100 is impressive all the way around, truly. Maybe someday canon will make a mirrorless camera, too?!  :P
With the phones the camera market is so turned on its head theses days.
I went outside yesterday (I live at the beach) with my 5DIII to shoot som clouds for backgrounds, and I was sitting on a bench with my camera next to me and a woman said "oh look, he has a "real" camera! (We had a hurricane going by off the coast and the waves were spectacular and we had a lot of day trippers ALL of whom were taking pics with their phones...I REALLY a stood out with The Beast! LOL! )
That is where this whole thing is headed. Me..I have a crappy little "dumb" phone and have never insulted my art by creating a photograph with it.  :-X

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