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Messages - drmikeinpdx

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Sounds like I should just do my own testing! :)

I recently got a 24-105, that's the F/4 lens I was thinking about.  I know the F/4 max aperture disables some of the focus sensors that need F/2.8, but the general performance of the autofocus in that lens is so impressive that I wonder if it will offset the small aperture limitations.  Guess I'll just have to find out.

To complicate matters, I sent my Sigma 50 in for a tune up last week and won't have it back in time for my shoot. 

I do have a 28mm F/1.8 and an 85mm F/1.8 that could be good performers. I am reluctant to try hand holding my 135 L lens, but that could be an option.

I'll just have to set up a low light focus test and see what happens. 

Happy Canoning!

I'm going to be doing some nighttime urban shots without a tripod using available light from streetlights and nightclubs.  I'm expecting to make use of the high ISO abilities of my 5D Mark 3.  A grainy, black and white motif is the plan.

I am wondering about which lenses to take along on this shoot, and here is my question:

How much does the maximum aperture of a lens affect autofocus performance in low light conditions?  I can select from lenses with max apertures ranging from F/1.4 to F/4.   Will the Mark 3 be able to focus better in marginal light with the larger aperture lenses?  Or does it depend more on the mysterious magic of the autofocus system in each particular lens and how it talks to the corresponding microprocessor in the body?

I've seen some discussion of the 6D being able to focus down to EV-1, or something like that, but nobody ever says if that varies with the lens that is attached to the camera.  It seems to me like it should.  Hopefully one of our resident experts can bring this issue into sharp focus!  LOL

EOS Bodies - For Stills / How about the Looney 11 rule?
« on: June 23, 2013, 12:35:08 AM »
Just thought this was interesting, although maybe not too useful in an era when we have LCD screens on every camera.

http://en.wikipedia.org/wiki/Looney_11_rule    8)

Software & Accessories / Re: Favorite new feature in LR 4/5
« on: June 22, 2013, 01:57:02 PM »
I'm loving the radial gradient thingy.  The enhanced "spot removal" is quite nice too and keeps me from using photoshop on many images that used to require a quick hop over to PS.

EOS Bodies / Re: Any news on the SL1 sensor?
« on: June 22, 2013, 09:11:00 AM »
I also handled one at my local Costco.  To me it felt so small that it didn't balance well with the kit zoom lens.  Not enough body to hold on to.   It might feel right to me with the 40 pancake, but I have an S-90 and a T2i for those times when I need a small camera.  I don't see the SL1 filling any useful role for me and since the sensor is nothing special, it's a big yawn here.

Lenses / Re: The real reason to buy a "Big White" Canon lens
« on: June 21, 2013, 09:28:25 PM »
Better lock your door and call your lawyer - Mayor Bloomberg's goon squad is about to arrest you for possession of an illegally large soft drink!

Canon EF Zoom Lenses / Re: Canon EF24-105mm f/4L IS USM
« on: June 14, 2013, 06:40:49 PM »
I finally replaced my ancient Tamron 28-75 2.8, when the price of the 24-105 got down to $725 last week.  It came in a white box with lens hood, pouch and US warranty registration papers.  I assume it was part of a kit.

First I did a focus test.  The point of focus at F/4 was within the depth of field at both ends of the zoom range, but being a bit obsessive about focus accuracy I put in +1 AFMA at both ends to make it closer to perfect.  Then I took the new lens and my 5D3 to the Portland Rose Garden for some practice.

I have to say I am very impressed with the autofocus, center sharpness and color rendering.  Edge sharpness is not very important in my work, so I can't comment on that.  The folks at LensRentals.com mention this lens as one of their least troublesome lenses, so hopefully it will continue to work well for a long time.

Here is a shot at F/4, 1/400, ISO 200.  It's been a while since I had an image that wasn't too naughty to post here!

EOS Bodies / Re: Eos 6D for $1562
« on: June 11, 2013, 03:41:29 PM »
Newegg.com has a discount code that brings the price down to $1521.19 with shipping.  Good for about the next five days it says.


Third Party Manufacturers / Re: Sigma 50mm 1.4 AF issues question
« on: June 04, 2013, 04:55:08 PM »
Autofocus performance is in general a mysterious and frustrating topic.  I have had a Sigma 50mm F/1.4 for around 3-4 years.  I got it to use on my 5D classic, but it front focussed enough to be annoying and there is no micro-adjust on that body.  (Canon calibrated the body for me shortly after I bought it used.)  I managed to get some use out of it for portraits by focusing on the subjects ear, then the eyes would be sharp!  ::)

When I got my 5D III last Fall, the Sigma worked great with it, needing very little MFA.  I use it a lot now for full body portraits at about F/2.0 to F2.8 to get just the right background blur.  Sorry I don't have any acceptable images to post right now, most of my work is not appropriate for this site.  ;)

Third Party Manufacturers / Sigma USB dock
« on: June 04, 2013, 04:12:12 PM »

I'm hoping for reports from some of our Sigma 35 owners soon!

Canon General / Re: Noooooooo....!!!!!!!!!!!!!!
« on: June 01, 2013, 03:30:55 PM »
You can expect a lot more of this kind of thing as more newspapers spiral around the drain before they go down.

Not only has technology changed, but most newspapers insist on pushing a biased political agenda that automatically alienates about half of their prospective customers.  I stopped reading newspapers about a decade ago and stopped watching television about five years ago.  I don't need elite journalists telling me what to think.   I'll end this here, as this is not really the place for such a discussion.

Lenses / Re: Canon 85mm f/1.8
« on: May 26, 2013, 01:08:55 PM »
Since Dylan mentioned an interest in the F/1.8 non-L 85, I thought I'd offer my two cents worth.  I'm using the 1.8 on my 5D3 and love it for my portrait/glamour/boudoir work.  It is light and fast focusing.  I like bokeh, but I don't often want the super-shallow DOF that you get at F1.2, so I find myself using the lens primarily between 2.0 and 2.8

The shot below was taken at: ISO 100, F/2.0, 1/3200.  I picked it because it shows the minor flaws of this lens, which I don't normally notice.

As you can see, it is not super sharp at F2.0 but it does improve rapidly as you get to F2.8 or so.

If you look at the cropped image, you will see the chromatic abberration on the fence cables.  You get green behind the subject and purple in front of the subject.  You can remove this with Lightroom, but I've never had to do that.  Note that there is no CR on the subject.  In any case, the CR is gone at F2.8

I'm a big fan of this lens.  If the price, weight and focus speed are important to you, I think it is much more attractive than the 1.2 L version. I'm pretty sure your clients will never notice the difference. :)

EOS Bodies / Re: New AF Technology Coming in July? [CR1]
« on: May 25, 2013, 01:55:03 PM »
“D— —– —- AF”

I don't think that's the name of the new technology, I think it refers to what we've had in the past.   Before I got my 5D3 I was always saying:  Damn autofocus!

Canon EF Prime Lenses / Re: Canon EF 85mm f/1.8 USM
« on: May 19, 2013, 01:46:00 AM »
Since I got my 5D III, with it's incredible autofocus system, I can now use my prime lenses to good effect.  One that has become a favorite is the 85mm 1.8 USM lens.  I shoot mostly people these days who are moving and posing, so a light, compact lens is very helpful.  This shot was at 1/200, ISO 200 and F/4.  The light was very flat due to the bright overcast sky, so I increased the contrast in Lightroom.  I can do so much in Lightroom now that I really question the need to have heavy, expensive prime lenses that give a bit better contrast or color rendering than the mid-range primes like the 85/1.8.  I have a 135L that is fun to use, but I can't pick out the 135L images from the 85/1.8 images without cheating.

This is not one of the better images from this shoot, but the model was quite the exhibitionist and there weren't many images suitable for this forum.    ;)

EOS Bodies - For Stills / Re: my new 5D3 battery life
« on: May 17, 2013, 12:14:16 PM »
So far I have not had to change batteries during a shoot and I've gone a bit over 1,000 shots.  Note that I don't use Live View, do you?

I'm not sure how accurate the battery condition report in the menu is. In any case, it is good practice to always carry a spare battery.

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