February 27, 2015, 12:21:54 PM

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.

Messages - drmikeinpdx

Pages: 1 2 [3] 4 5 ... 25
Lenses / Focus asymmetry - Canon 50mm 1.2 L
« on: December 28, 2014, 03:21:58 PM »
A few weeks ago I picked up a Canon 50mm 1.2 L from another local photographer at a decent price, $1050.  The lens appears to be in good condition and I'm using it on my 5D3.

I intend to use this lens for portraiture at about 4-6 feet, with the aperture wide open.  Since this will require very accurate focus, I conducted some of my usual autofocus tests in that distance range using the various autofocus points in the viewfinder of the 5D3.  All tests were done wide open, so focus shift with aperture changes would not be an issue.

The center focus point works great with no AFMA needed.  Accuracy is within one inch at 5 feet and very repeatable!

Unfortunately, the peripheral focus points tend to front focus.  The farthest point to the right will front focus by about 4-5 inches. The top one, about 3-4 inches.  The left and bottom points front focus by about two inches.  I use that farthest right point a lot since I hold the camera vertically and place that point on the subject's eye.  You only have about a two inch depth of field at 5 feet, at F/1.2.

As a control, I ran the same tests with my Canon 85mm 1.8 and all points were within one inch.  (Love that lens.)

I will probably send the L lens in to Canon for calibration.  I'm planning to call on Monday and ask if I should also send the body with it.

Anyone run into this before or have an idea what the problem is?  Anything I can do to help Canon diagnose and correct the problem?


Software & Accessories / CC on multiple devices?
« on: December 16, 2014, 11:55:44 AM »
Is anyone using Adobe CC on multiple machines?  Care to share your experience?

I'm retiring from my day job soon and will be free to do more traveling.  I can see myself doing a lot of processing on a laptop in addition to my main computer at home.  Maybe on the I-pad too.  It would be nice if I could use the CC license to put the latest version of the software on whatever machine I happen to buy.

I saw in a video that Scott Kelby carries his Lightroom database around in some kind of Drobo hard drive unit and plugs it into whatever computing device is handy at the time.  I can see the advantage in that for a photogapher who travels a lot.

Thanks, that's what I was wondering.  So it is a general purpose telephoto zoom then.  I can understand that.  :)

What genre do you guys use this type of lens for?   I'm having a hard time imagining what I would do with it.   At that price, I assume there is something it excels at?


Yes, that's my question... WHAT are people using this lens for?  Obviously it has some fans here on CR.  Most  lenses at this price point have some particular purpose.  Is it a sports lens, a walking around lens, a birding lens?  Do wedding photographers love it?   I'm just curious to know what justifies the price.  What does it do that you can't accomplish with cheaper lenses or one that you already own?

What genre do you guys use this type of lens for?   I'm having a hard time imagining what I would do with it.   At that price, I assume there is something it excels at?

Good discussion, I like the "go dreamy" comment!  LOL

Add me to the list of photographers who doesn't much like the in-camera light metering.  I had a spot meter back in my Ansel Adams period about 30 years ago, which was fun, but the photography I do now does not allow time for that.

I gave up on the histogram a long time ago.  Thanks for the tip about Magic Lantern using a RAW histogram.

For my professional work, where I can take a few seconds to compose and expose, I usually shoot on manual and just look at the LCD screen.  I've done it so much that I've developed a pretty good eye.

When doing scenic or travel shots, I often use a three shot exposure bracket burst.  When I get the images into Lightroom, I can choose the best exposure or combine them using Photomatix Pro for HDR.

Pricewatch Deals / Re: Deals of the Day: Canon EOS 6D Body
« on: November 28, 2014, 07:18:44 PM »
I only see one deal.  Is there a second one?

Pricewatch Deals / Re: Deal: Exclusive Sigma 50mm f/1.4 Art Lens Savings
« on: November 23, 2014, 12:15:55 PM »
Just by chance a Canon 50mm 1.2L popped up on Craigslist yesterday and the owner was willing to negotiate a reasonable price.  I decided to go for it and stop agonizing over my 50mm lens choice.

My reasoning is that I do not need absolute max sharpness, but I do need autofocus consistency.  I have had too many autofocus frustrations in the past and did not want to risk getting into that again. 

EOS Bodies / Re: Canon 5DIV: 36 MP US $ 3799 TBA in March 2015
« on: November 23, 2014, 01:38:24 AM »
36 mp?

Bet they put two of the ubiquitous 18 mp crop sensors together.  Will be called "Dual Sensor Technology."

Pricewatch Deals / Re: Deal: Exclusive Sigma 50mm f/1.4 Art Lens Savings
« on: November 21, 2014, 08:28:57 PM »
Wow, that's fabulous to get a discount on this lens so soon after release.  My written review is just getting the finishing touches (it will go live next week), but my video review just went live for those of you debating whether or not to buy.

The video review can be seen on YouTube here:  http://bit.ly/1xXyVhf

Great timing on posting your review, Dustin!  I'm really uncertain about this lens.  I'd love to have a 50mm lens that has more consistent autofocus than my quirky Sigma 50 classic that I've learned to live with.  On the other hand, at least half the people who review the Art lens comment on the quirky autofocus!  I just can't win!

I tried to do the smart thing and rent one from LensRentals.com.  I got one that had horrible front focus from the outer focus points, but the images where I used the center point were fabulous.  Sometimes I think the camera gods are just trying to torment me!

Maybe I will roll the dice and see if I get a good one, but be prepared to send it back as many times as needed to get a good one. 

Maybe I should sacrifice a goat or something?

Lenses / Re: EF 35mm f/1.4L II to Finally Come as Well? [CR2]
« on: November 14, 2014, 11:51:27 AM »
Don't need a 35 for my work.  I'm holding out for a new 50mm lens.  It may be a long wait!    :'(

It's really strange to be in a situation where there is nothing I can justify buying in the Canon (or Sigma) lineup.  I've been something of a fanboy for the last several years, but lately my disposable cash has been going elsewhere.   At least there is LensRentals.com to keep me interested in trying out new gear and help me use up my extra $.

EOS Bodies - For Stills / Re: I took the cheap road to FF
« on: November 11, 2014, 12:30:45 AM »
I cleaned the sensor on my 5D classic a couple of times with a product called  Sensor Swab along with a cleaning fluid called Eclipse E2.  It worked fine, although the products are rather expensive.  I'm pretty spoiled now by the self cleaning cameras.

Remember that the 5D classic does not have Micro Focus Adjustment.  Getting accurate focus with large apertures is pretty hit or miss.  On mine, some lenses worked well and others were unusable.  I would think that a lens like the 24-105 F/4 L would be a nice companion for a 5Dc.  I didn't have any L lenses the time.  Might have kept the camera longer if I did.

Oddly, the one lens that worked the best was a Tamron 28-75 F/2.8, probably just dumb luck.

Lenses / Re: Rented a big white and wow
« on: November 09, 2014, 12:09:01 AM »
Nice shot!  Looks like it came through just fine.

I enjoyed clicking back and forth between the 7D and the 7D2 at various ISOs.  I'd say less than one stop of improvement.  If you take into account the five year wait, it's definitely not very impressive to me.  I plan to keep my 7D classic as a backup to my 5D3.

However, I'm happy for you guys and gals who shoot sports and birds.  Looks awesome for you.  Hope you have fun with the new camera!

Third Party Manufacturers / Re: One Samsung Camera to Rule Them All
« on: November 02, 2014, 09:38:06 PM »
Going by my experience with my Samsung Galaxy 4, I bet their new camera has wi-fi capability.  I would also guess that you won't be able to keep Samsung from doing forced downloads of profitable bloatware.  I can just imagine myself photographing a hot model and having an ad for a some new ride sharing service take over my LCD screen!

Pages: 1 2 [3] 4 5 ... 25