December 20, 2014, 08:25:31 PM

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Messages - cdn_photog

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1
Animal Kingdom / Re: Show your Bird Portraits
« on: December 13, 2014, 12:09:31 AM »
@ Jack - Great waxwing shots. Hope to see some eagle photos from you soon as well.

2
Animal Kingdom / Re: Portrait of your "Best friend"
« on: November 04, 2014, 01:43:59 AM »
My best friend as long as I was the one throwing the stick. Taken with 5D3 & Canon 70-200 F4L IS.  Processed with DXO Optics 10 (lens softness module & vignetting which brightened the whole image so I brought down the exposure by .25).

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Taken in August 2010 with my new-at-the-time 7D in Inglewood Bird Sanctuary in Calgary.  Canon 70-200 F4 lens.  Recently reprocessed with DXO Optics 10 which is giving new life to my old files.  I upgraded from the 7D to a 5D3 and don't regret it for one second, but if I had a program like DXO back then I might have kept the 7D.

4
Landscape / Re: Fall colours
« on: October 13, 2014, 09:08:39 PM »
The leaves are falling quickly around here - not many left.

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Thanks mackguyver.

6
I had a chance to try again. I cleaned the contacts per Canon's advice, hung my camera bag from the tripod for extra stability, and used better lighting. It was a big improvement over the first attempt (at the same AFMA setting, so that wasn't the problem). Still not 100%, but probably 98% so I am happy with that.  Just goes to show how many little details there are that affect picture quality. Thanks again for all the advice & tips.

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@mackguyver - Thanks for the tip about lighting. I think I had the camera locked down pretty tight on the tripod, but probably could have used more light. I will try that.  IS was off. I was shooting from about 20 feet, 25x 280mm is ~23 feet so not quite where I need to be but that is the longest stretch of hallway I have.

@valvebounce - I'm sure I attached the extender to the lens first, and will make sure I do when I try again.

I emailed Canon and they recommended cleaning the contacts before giving up and sending it in for service, so there are still a few variables I need to eliminate.  Thanks all for the tips & advice.

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@mt spokane - thanks. I will try renting a v2 extender and a different copy of the lens to see if that makes any difference. If my combo is the only one with this issue then I probably will have to send it in.

@horshack - I have tried AFMA settings on either side of this setting and this is the best one, with consistent results. I didn't test other focal lengths because if I have the extender on the lens is always at 200mm.

9
Thanks horshack.  I think I have the AFMA at the best possible setting, based on multiple tests, it just isn't quite as sharp as when focusing with Live View.

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That is an interesting point. I should rent a v2 1.4x extender along with the 70-200 f4L IS and test all the combinations. It looks like I can get both.

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The 1.4 extender is version 3.  Purchased last year, as was the 70-200 f4L IS.

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I just did some more quick test shots. Using the 70-200 at 200; 24-105 at 105; and 100L macro. The shots taken with live view vs viewfinder look to be very consistent in terms of sharpness. So it must be something to do with the extender. Odd.

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Not really, but I could always rent one. Maybe I should try to rent a different 70-200 f4L IS to see if the same thing happens. If I rent anything better than what I already have that will likely lead to upgrading.

The result I got, with a bit of sharpening in software, was enough of an improvement over what I was getting that I was pretty happy with it.  Until I saw how much better the live view version is. I usually photograph outside, birds, animals, etc, so using live view is not a practical option most of the time.

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This is the only combination that I am struggling with. I used FoCal on my others (100L macro, 24-105L, and 35 f2.0 IS) and they all seem to be working as expected.  The 70-200 on its own seems to be working fine too.

15
Thanks neuro. But if it is an issue with the camera, lens, and/or extender, wouldn't both images be the same?  i.e. show the same defect?  It seems to me that I almost need a 0.5 adjustment as 1 either way made the image worse.  Although I'm not even sure if this is a front/back focusing problem. The lines on the ruler in front of and behind the 9 don't seem any sharper than on the 9 itself.

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