Messages

286

EOS Bodies - For Stills / Re: ISO 50

« on: January 21, 2013, 09:49:24 AM »

There's a reason ISO 50 needs to be unlocked to be used. It's not actually ISO 50. It's ISO 100 being reduced in camera to ISO 50. The same as shooting ISO 100 and then in post bringing the exposure down a stop. I would never shoot with it.

Exactly.  There's no real benefit to ISO 50, except perhaps convenience if you're shooting in Av mode and want a stop slower shutter speed.  But if a highlight would be blown at ISO 100 with a given aperture/shutter combo, it'll be just as blown at ISO 50.

Neuro, my tests indicate differently to this. Iso 50 highlights are clearly more blown. I can never contradict you, so please tell where I am going wrong here..

287

EOS Bodies - For Stills / Re: ISO 50

« on: January 21, 2013, 09:47:26 AM »

Here is another picture that helps me understand this better.
I had shot this on 5d2 just when I was starting off with photography and I used to often wonder why certain portions of the clouds lacked detail. I hunted this photo down in an old HD and yes, it is shot at ISO 50.
Hmmm I too will now avoid ISO 50...

288

EOS Bodies - For Stills / Re: ISO 50

« on: January 21, 2013, 09:29:24 AM »

50iso is no 50 iso, it is equivalent to 100 iso over exposed 1 stop, what you gain is for example  slower exposure time which can be handy , running water etc but at the same time that the sensor is richer exposed you lose 1 stop of DR and that is in the highest levels= earlier clipping

Thank you for the explanation. To me, when I re examine the photos based on what you saying, it seems like ONLY the whites are getting overexposed, NOT the entire frame. Could I conclude that not the entire frame but only the whites get over exposed?

289

EOS Bodies - For Stills / Re: ISO 50

« on: January 21, 2013, 09:01:56 AM »

It should be more blown out, 50 iso is 100 iso over exposed 1 stop= 1 stop earlier clipping in highlights

Sir do not understand. Am not disputing, just unclear as to what you saying. Could you please expand?

290

EOS Bodies - For Stills / Re: ISO 50

« on: January 21, 2013, 08:01:06 AM »

My test.
1. It is unscientific, do not pounce on me. Am learning!
2. Stats: 1dx. 24-70 II. Manual focus, exposure, WB (tungston). f5.6 1/4 and 1/8.

Its all for us to see, but to my eyes:
1. The tint at ISO 50 is truer. (This is next to my desk and I can make a visual comparison)
2. The blown whites between the statue and lamp is blown more on 50 ISO.
3. 50 ISO shows marginal noise and sharpness improvement. (This could of course be just my eyes playing games.) Or is there a shake? I did use a sturdy tripod.

Do you think I should make another test? If yes, how should I improve?

Thank you.

Sanjay

291

EOS Bodies - For Stills / Re: ISO 50

« on: January 21, 2013, 01:17:36 AM »

Nice thread. Learning a lot.

I think this evening I will take two shots with ISO 50 and 100 and post them here for us to see and learn.

292

EOS Bodies - For Stills / Re: Kenrockwell comments on Canon 6d

« on: January 20, 2013, 02:14:11 AM »

....Anyone with that self professed knowledge and latest high tech gear at his disposal, should indeed have better results.  His work suffers from lack of any creativity whatsoever, and that alone, for me, destroys his credibility.  That's it.

I can appreciate that.  For more advanced professionals like yourself and most others on this site, what KR discusses is irrelevant.  Your career is driven by your own creative intentions and desires.  Superficial discussions about whether a 6D or 5Diii or 1Dx is better is pointless when you are trying to break new ground by producing photographs that are new, innovative and relevant.  Your need for information on gear and how to put a photo together is based solely on the inspiration that you have and the need to make it a reality. If anything, you'd be looking at advanced lighting and post production techniques - not KR.

OMG, I've written two posts on KR topic.  We need to spice things up with some new 7D2, 400mm f/5.6 IS, FF mirrorless, and high MP 3D rumours.

\

Hahahaha.

293

Canon General / Re: FYI: This Is The Gear Used To Take Obama’s New Official Portrait

« on: January 20, 2013, 02:11:29 AM »

85L at 7.1. What a waste!!!

I never understood why portrait and extremely shallow dof seem to be synonymous for some - it's certainly nice to have the *option* for subject isolation and extreme background blur esp. if the bg is crappy, but if either the eye *or* the nose is in focus it's not necessarily the most pleasing look to me and probably non-photogs that don't get high when looking at a super-creamy bokeh (if they know the word) :-o

I think you mostly use f/1.2 when you first get the lens - because you can, and then you start to get real realise that in order to shoot portraits with both eyes in focus, you do need to stop the lens down.
The real justification for shooting this lens wide open is when you are just desperate for light, or when you have a subject where you want to isolate one small part, but not for normal portraits.

Yes and no.

294

EOS Bodies - For Stills / Re: Request for Advice: 5D3 AF issues nightphotography

« on: January 19, 2013, 12:44:31 PM »

JR!! I do not know friend. These questions are far too technical for me... But if I get this info anywhere I will tell you. Wait I want to check something...

I just walked to the cupboard and checked. Yep, the 90 tilt shift has a hard stop. My 24 ts is out on rental so cant check but feel confident that it also has a hard stop. But f4 is not too good for stars...

295

EOS Bodies - For Stills / Re: Kenrockwell comments on Canon 6d

« on: January 19, 2013, 12:37:38 PM »

thx magnardo.
hobby shooter i wait!

296

EOS Bodies - For Stills / Re: Request for Advice: 5D3 AF issues nightphotography

« on: January 19, 2013, 11:57:45 AM »

I so prefer lenses with 'hard stops' like my zeiss 35 and 15 for this.

297

EOS Bodies - For Stills / Re: Request for Advice: 5D3 AF issues nightphotography

« on: January 19, 2013, 11:56:47 AM »

Yep live view is safer.

298

EOS Bodies - For Stills / Re: ISO 50

« on: January 19, 2013, 11:55:37 AM »

No JR.
I find 50 asa to be 'smoother' than 100.
And YES it seems like DR is reduced when shooting at 50, but if on a tripod you could bracket and merge in PS.
I so prefer to use ISO 50 when my camera is on tripod or when I have enough light.

Perhaps you should make a test and judge for yourself. If you do, I would love to know your thoughts. Please send me a personal message as I might miss your reply here.

This is of interest to me.

Best...

299

EOS Bodies - For Stills / Re: Kenrockwell comments on Canon 6d

« on: January 19, 2013, 11:50:41 AM »

Thanks for the tips. They seem valuable!

300

EOS Bodies - For Stills / Re: Request for Advice: 5D3 AF issues nightphotography

« on: January 19, 2013, 11:29:03 AM »

Pedro.
Use a little flashlight, set the focus on infinity and CHILL.